ADDENDUM NO.3
June 10, 2016
INDIANAPOLIS INTERNATIONAL AIRPORT
Electric Bus Charging Infrastructure
IAA Project No. I-16-060
CONTENTS
ADDENDUM NO. 3 TEXT
ITEMIZED PROPOSAL
SPECIAL PROVISIONS
PAGES 2-4
PAGES 5-7
PAGES 8-73
Date: June 10, 2016
Page 1 of 4
ADDENDUM NO. 3
Electric Bus Charging Infrastructure
IAA Project No. I-16-060
INDIANAPOLIS INTERNATIONAL AIRPORT
TO: All Plan Holders of Record
The following addendum items modify, change, delete from or add to, the
requirements of the contract documents for this project. The articles contained
in the addendum take precedence over the requirements of the previously
published contract documents. Where any article of the contract specifications
or any detail of the contract drawings is modified or any paragraph,
subparagraph or clause thereof is modified or deleted by the articles contained
in this addendum, the unaltered provisions of that article, paragraph,
subparagraph or clause shall remain in effect.
All Contractors shall
acknowledge receipt of this Addendum in the space provided in the Bid
Proposal Packet.
Item No. 1 – Changes to Bid Drawings
A.
Drawing 00.E.008 – Remove references to installing concrete encased
ductbank for all Horizontal Directional Drill (HDD) installations as
indicated by Section 1/E-14 call-outs. The HDD installations will not be
concrete-encased.
B.
Drawing 00.E.009 – Note that Section 1/E-14 calls for HDD installation,
and need not be concrete encased.
C.
Drawing 00.E.012 – Plan B – Contractor shall route underground ductbank
to avoid Bus Shelter 13, adjacent trees, and other utilities.
D.
Drawing 00.E.13A – Plan A – The primary service entering the proposed
15 kV switch (far left of plan) shall be concrete encased as shown on
Section 1/E-14.
E.
Drawing 00.E.13B – Plan A – The primary service entering the proposed
15 kV switch (far left of plan) shall be concrete encased as shown on
Section 1/E-14
F.
Drawing 00.E.014 – Section 1 – Concrete encasement will be required
only on open cut installations (such as those shown on Drawings
00.E.13A and 13B) and not on Horizontal Directional Drill (HDD)
Page 2 of 4
installations. For HDD installations, strap the #4/0 bare copper ground
to one of the conduits.
Item No. 2 – Itemized Proposal
A.
Replace the itemized proposal with that included within Addendum #3.
Item No. 3 – Special Provisions
A.
Add the following special provisions within Addendum #3. These special
provisions shall complement and not replace the existing special
provisions.
1. 16015 – Electrical Systems Analysis
2. 16121 – Medium Voltage Cable
3. 16380 – Medium Voltage Load Interrupter Switches
4. 16425 – Low Voltage Switchboards
5. 16430 – Dry Type Pad Mounted Transformers
Item No. 4 – Questions from Bidders and Responses
B.
Who will supply the 800amp 600volt disconnect switch for OHC-1?
1. Contractor
is responsible for furnishing
equipment shown on the Drawings.
C.
is responsible for furnishing
equipment shown on the Drawings.
is responsible for furnishing
equipment shown on the Drawings.
is responsible for furnishing
equipment shown on the Drawings.
installing
all
and
installing
all
and
installing
all
and
installing
all
Who will supply transformer T-1 75kva for PIC-3?
1. Contractor
is responsible for furnishing
equipment shown on the Drawings.
G.
and
Who will supply panel RP-1 400amp 120/208volts for PIC-1 and PIC-2?
1. Contractor
F.
all
Who will supply the MPZ-1 mini power zone for OCH-2?
1. Contractor
E.
installing
Who will supply the outdoor 1200 amp 600volt Enclosed Unitized Power
Center for OCH-2?
1. Contractor
D.
and
The drawings call out for PVC coated GRC conduit for everything? Is this a
requirement?
Page 3 of 4
1. Rigid metal conduit is required.
AIRPORT UNDERGROUND
CONDUITS.
H.
Refer to specification L-110 –
ELECTRICAL DUCT BANKS AND
Do you have specifications for all material we are providing?
1. Refer to the Technical Provisions and Special Provisions for the
specifications on equipment and material to be provided.
Page 4 of 4
Itemized Proposal
Indianapolis International Airport
ELECTRIC BUS CHARGING INFRASTRUCTURE
Project No. I-16-060
Item
Item
Code
Description
Qty
Unit
Base Bid
1
M-102
Maintenance of Traffic
1
LS
2
M-103
Construction Engineering
1
LS
3
M-104
Project Security
1
LS
4
M-105
Mobilization/Demobilization
1
LS
5
P-151
Clearing & Grubbing
1
LS
6
P-152
Excavation
1
LS
7
P-401
Plant Mix Bituminous Pavement (Restore Existing)
1
LS
8
P-501
Concrete Pavement and Sidewalks (Restore Existing)
1
LS
9
P-620
Pavement Marking (Restore Existing)
1
LS
10
D-754
Concrete Gutters, Ditches, and Flumes (Restore Existing)
1
LS
11
L-108
Underground Conduit and Wiring – Section 1 (HDD)
808
LF
12
L-108
Underground Duct Bank and Wiring – Section 1 (2-conduit)
with concrete encasement
30
LF
13
L-108
Underground Duct Bank and Wiring – Section 2 (14-conduit)
170
LF
14
L-108
Underground Duct Bank and Wiring – Section 3 (4-conduit)
212
LF
15
L-108
Underground Duct Bank and Wiring – Section 5 (2-conduit)
465
LF
16
L-108
Underground Duct Bank and Wiring – Section 8 (10-conduit)
68
LF
17
L-108
Underground Duct Bank and Wiring – Section 10 (10-conduit)
62
LF
18
L-108
Underground Duct Bank and Wiring – Section 11 (3-conduit)
35
LF
19
L-108
Underground Duct Bank and Wiring – Section 12 (15-conduit)
20
LF
20
L-110
Exposed Electrical Duct – Section 6, including necessary
supports, pull boxes, and associated work. Sheet E.00.011 only
– Plug-In Charger 3
300
LF
BP 5.1
Unit Price
Total Price
21
L-110
Exposed Electrical Duct – Section 7 (Option A), including
necessary supports, pull boxes, and associated work. Sheet
E.00.010 only – Overhead Charger 2
22
L-115
23
850
LF
4’x4’ Electrical Handhole, Complete
3
EA
L-115
6’x6’ Electrical Handhole, Complete
1
EA
24
T-901
Seeding
1
LS
25
T-905
Topsoiling
1
LS
26
T-908
Mulch
1
LS
27
16000
Install Overhead Electric Charger, Complete
2
EA
28
16000
Install Plug-In Charger, Complete
3
EA
29
16000
Install Outdoor 600A, 15KV Switch, Complete
1
EA
30
16430
Install Pad-Mount Exterior Dry-Type Transformer T-1 and Pad
1
EA
31
16000
Install Outdoor Enclosed Unitized Power Center #1, Complete
1
EA
32
16000
Install Mini Power Zone MPZ-1, Complete
1
EA
33
16000
Install Outdoor Enclosed Unitized Power Center #2, Complete
1
EA
34
16425
Install Interior 5000-Amp Switchboard and Pad, Complete
1
EA
35
16000
Install 200-Amp Breaker in Existing Panelboard, Complete
1
EA
36
16000
Allowance for IPL Utility Costs for Primary Electric
Connections*
1
LS
37
16000
Electrical Grounding
1
LS
$50,000
$50,000
TOTAL BASE BID AMOUNT IN WORDS:
NAME OF FIRM:
SUBMITTED BY:
TITLE:
ADDRESS:
* Note:
IPL allowance shall be carried by all bidders in the base bid. After IPL completes the work, a change order will be issued to rectify the
costs to the actual costs incurred and invoiced by IPL, which will either increase or decrease the contract value.
BP 5.2
Itemized Proposal
Indianapolis International Airport
ELECTRIC BUS CHARGING INFRASTRUCTURE
Project No. I-16-060
Item
Item Code
Description
Qty
Unit
Alternate #1
1A
L-110
2A
16000
3A
16000
Delete: Item 21 from Base Bid – Exposed Electrical Duct –
Section 7 (Option A). Sheet E.00.010 only – Overhead
Charger 2
Add: Exposed Electrical Duct, including necessary supports,
pull boxes, and associated work. – Section 6 (Option B).
Sheet E.00.010 only
Install Outdoor 600A, 15KV Switch and Pad, Complete
(Option B)
Install Pad-Mount Exterior Dry-Type Transformer T-2 and Pad,
Complete (Option B)
TOTAL ALTERNATE #1 AMOUNT IN WORDS:
NAME OF FIRM:
SUBMITTED BY:
TITLE:
ADDRESS:
BP 5.3
900
LF
1
EA
1
EA
Unit Price
Total Price
© 2016 CDM Smith
All Rights Reserved
June 2016
SECTION 16015
ELECTRICAL SYSTEMS ANALYSIS
PART 1 GENERAL
1.01
SCOPE OF WORK
A. Provide both a preliminary and a final power system study including short circuit, coordination
and arc flash study as specified herein and as shown on the Drawings.
B.
C.
Obtain and pay for the services of the electrical equipment manufacturer, subject to the approval
of the Owner, to provide a complete power system study on all new electrical equipment.
1.
The power system study shall begin at the Owner’s 13.2 kV Main Switchgear protective
device and include all of the electrical protective devices down to and including the
protective devices on all transformer primaries, switchboards, distribution panels,
panelboards, and packaged electric bus charging equipment at 480V and 120/208V.
2.
All information required to perform the study shall be obtained by the entity performing
the study.
Submit the preliminary power system studies prior to submittal of electrical equipment package.
The aforementioned shop drawings will not be reviewed until the preliminary power system
study is approved by the Engineer. No exceptions will be allowed. The preliminary study shall
include but not limited to:
1.
Short circuit, protective device coordination, and arc flash studies performed on nationally
recognized computer software such as SKM System Analysis, EDSA, ETAP, or approved
equal.
2.
Obtain and verify with the utility and/or Owner’s representative, all information needed to
conduct the study. Obtain and verify with the Owner ratings of existing electrical
equipment to be included in the study.
3.
Current transformers' ratio and burden calculations shall be based on a 10 percent
maximum ratio error per ANSI C57.13. Identify current transformers that will not allow
the protective devices to operate within acceptable ANSI error margins and recommend
corrective action.
4.
The preliminary study shall verify equipment is being applied within the published ratings
and electrical protective devices will coordinate.
5.
Make adjustments to all protective devices being provided to ensure proper ratings and
coordination.
6.
Recommend changes and/or additions to any existing equipment as required to adequate
protection and coordination.
7.
Submit any such changes and additions as a part of the study.
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8.
June 2016
Field settings of devices, adjustments, and minor modifications to equipment that are
required to accomplish conformance with the approved power system study shall be
carried out by the Contractor at no additional cost to the Owner.
D. After release of electrical equipment by the manufacturer, but prior to energizing the electrical
equipment, submit the power system study as specified herein.
1.
Provide the completed short circuit, protective device coordination, and arc flash studies
for review and approval. The study shall include but shall not be limited to:
a. Full compliance with applicable ANSI and IEEE Standards.
b. Preformed on nationally recognized computer software such as EDSA, SKM System
Analysis, ETAP, or equal.
2.
Provide a report summarizing the power system study including: one-line diagram of the
system input and each set of study results, relay and breaker setting tabulation,
coordination curves, circuit breaker curves, all study calculations.
1.02
RELATED WORK
1.03
SUBMITTALS
A. Submit, in accordance with GP-50-03, the following:
B.
1.
The number of years the manufacturer has been in the business of performing coordination
studies.
2.
Identification of each of the three qualifying projects for each of the past three years
including:
a. A brief description of each study.
b. Name of owner of installation on which study was performed with address, telephone
number, and contact person.
c. Date of study.
d. Any other information indicating the firm's experiences and ability to perform the
work and business status.
Preliminary Short Circuit, Coordination, and Arc Flash Study Report shall include but not
limited to:
1.
The study reports shall be bound in a standard 8-1/2-in by 11-in size report. Each study of
section shall be tabbed and include a table of contents.
2.
Provide electrical distribution system, data input, short circuit levels, and arc flash level
one-line diagrams. One line diagrams shall be legible on printed paper and shall not exceed
11 x 17-in in size unless required to clearly illustrate the system and related data.
3.
Provide detailed “Input Data” report that identifies all input parameters associated with the
equipment depicted on the system one line diagrams including but not limited to the Utility
and Owner data, conductor sizes and lengths, protective device sizes and rating,
transformer sizes and ratings, motor types and sizes, etc.
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C.
June 2016
4.
Provide current transformers' ratio and burden calculations to confirm that the current
transformers will not saturate prior to operation of the protective relays and confirming the
current transformers used with differential protection will not saturate under any fault
condition.
5.
Tabulation of each protective device, its short circuit rating, the available fault current
available at the device and an indication whether or not the device is adequately rated for
the available fault current and voltage at which it is applied.
6.
Preliminary graphic time-current curves showing how the protective devices proposed by
the equipment suppliers will coordinate as being applied. TCC’s shall be produced and
printed in color to assist the reviewing engineer in the graphical analysis of the protective
device coordination. Each device on a TCC shall be a different color and where devices are
shown on multiple TCCs the color for the device shall be constant on each TCC that the
devices are shown on.
Final Short Circuit, Coordination, and Arc Flash Study Report shall include but not limited to:
1.
The study reports shall be bound in a standard 8-1/2-in by 11-in size report. Each study of
section shall be tabbed and include a table of contents.
2.
The selection of all protective relays types, current transformers, fuse types and ratings
shall be the responsibility of the manufacturer and shall be based on the preliminary
coordination study
3.
The complete study shall be approved by the Owner before any equipment is shipped. The
report shall include the following sections and information:
4.
An executive summary outlining the distribution system, the information received from the
power company, assumptions made to complete the report, statement of the adequacy of
the distribution equipment to safely clear any fault currents, the adequacy of the
distribution equipment to close in on a fault, identify any problem areas with
recommendations for resolving the problem.
5.
Provide electrical distribution system, data input, short circuit levels, and arc flash level
one-line diagrams. One line diagrams shall be legible on printed paper and shall not exceed
11 x 17-in in size unless required to clearly illustrate the system and related data.
6.
Provide detailed “Input Data” report that identifies all input parameters associated with the
equipment depicted on the system one line diagrams including but not limited to Utility
data, conductor sizes and lengths, protective device sizes and rating, transformer sizes and
ratings, motor types and sizes, etc.
7.
Provide current transformers' ratio and burden calculations to confirm that the current
transformers will not saturate prior to operation of the protective relays and to confirm the
current transformers used with differential protection will not saturate under any fault
condition.
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8.
Transformer differential protection calculations including current transformer mismatch
relay setting and charts. Provide differential current transformer wiring schematics
including polarity and wiring connections based on the winding configuration of the actual
power transformers being supplied.
9.
Tabulation of all protective devices, circuit breakers, fuses, current transformers, etc. The
tabulation shall indicate the device, manufacturer, catalog number, recommended setting,
etc.
10. Industry standard graphic time current, protective relay and protective device curves,
showing equipment and material damage curves, relay, circuit breaker, fuse curves,
available fault currents at the equipment, transformer inrush currents, etc., for each piece of
equipment. TCC’s shall be produced and printed in color to assist the reviewing engineer
in the graphical analysis of the protective device coordination. Each device on a TCC shall
be a different color and where devices are shown on multiple TCCs the color for the device
shall be constant on each TCC that the devices are shown on.
11. Tabulation of each protective device, its short circuit rating the available fault current
available at the device and an indication whether or not the device is adequately rated for
the available fault current and voltage at which it is applied.
12. Calculations and required documentation including copies of correspondence with
involved entities such as utility fault contribution coordination.
D. Submittal of Digital Data and System Model
1.04
1.
Following final approval of any of the above mentioned studies, the Contractor shall
provide a digital copy of all reports submitted as part of the project. Reports shall not be
password protected and shall be free manipulated by the engineer or owner.
2.
Following final approval of any of the above studies, the Contractor shall provide the
complete digital system model and system library used to build the model and complete the
studies. All files needed to accurately recreate the study completed by the Contractor must
be furnished and a backup of the system library used to define all system components must
be provided.
REFERENCED STANDARDS
A. Institute of Electrical and Electronic Engineers, Inc. (IEEE):
1.
Plants
2.
Standard 241, Recommended Practice for Electrical Power Systems in Commercial
Buildings
3.
Standard 242, Recommended Practice for Protection and Coordination of Industrial and
Commercial Systems
4.
Standard 399, Recommended Practice for Industrial and Commercial Power System
Analysis
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© 2016 CDM Smith
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B.
1.05
June 2016
5.
IEEE Std. 519- Recommended Practices and Requirements for Harmonic Control in
Electrical Power Systems, 1992
6.
IEEE Std. 1584- IEEE Guide for Arc Flash Hazard Calculations, 2002
7.
NFPA 70E 2012.
8.
IEEE Std. 242-2001
American National Standards Institute (ANSI):
1.
Standard C37.90, IEEE Standard for Relays and Relay Systems Associated with Electric
Power Apparatus
2.
Standard C37.91, IEEE Guide for Protective Relay Applications to Power Transformers
3.
Standard C37.95, IEEE Guide for Protective Relaying of Utility-Consumer
Interconnections
4.
Standard C37.96, IEEE Guide for AC Motor Protection
5.
Standard C57.12.59, IEEE Guide for Dry-Type Transformer Through-Fault Current
Duration
6.
Standard C57.13, IEEE Standard Requirements for Instrumentation Transformers
7.
Standard C57.109, IEEE Guide for Liquid-Immersed Transformer Through-Fault-Current
Duration
QUALITY ASSURANCE
A. Manufacturer’s Experience
1.06
1.
The Manufacturer shall have been in the business of the type of work specified, for at least
the past five years.
2.
The Manufacturer shall have a minimum of three projects of equal or greater size, service,
with the type of equipment specified for each of the past three years.
B.
Manufacturer shall be incorporated in the State of Indiana in which the equipment will reside
and shall have a licensed, in the same jurisdiction, professional engineer as a full time
employee, to supervise and seal the report.
C.
All electrical studies shall be stamped and signed by a professional electrical engineer. The
engineer shall be registered in the State of Indiana where the equipment will reside.
SHORT CIRCUIT STUDY
A. Perform a short circuit study in accordance with ANSI Standards C37.010 and C37.13 to check
the adequacy and to verify the correct application of circuit protective devices and other system
components within the construction package. The study shall address the case when the system
is being powered from the utility source as well as from the on-site generating facilities, normal
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Indianapolis International Airport
Electrical Systems Analysis
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© 2016 CDM Smith
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June 2016
and alternate (bus tie closed) modes of operation. Minimum and maximum possible fault
conditions shall be covered in the study. It shall be the responsibility of the Contractor
performing the study to determine the operating parameters of the system and to derive the
worst case fault conditions. Assumptions of plant operation shall not be allowed.
B.
Consider the fault contribution of all motors operating during the maximum demand condition
of the motors.
C.
Calculate short-circuit momentary duties and interrupting duties on the basis of an assumed
bolted 3 phase short circuit at each high and medium voltage switchgear bus and controller, low
voltage switchgear bus, switchboard, motor control center, distribution panelboard, pertinent
branch circuit panelboard and other significant locations throughout the systems. The short
circuit tabulations shall include X/R ratios, asymmetry factors, KVA and symmetrical faultcurrent. Provide a ground fault current study for the same system areas. Include in tabulations
fault impedance, X/R ratios, asymmetry factors, motor contribution, short circuit KVA, and
symmetrical and asymmetrical fault-currents.
D. The studies shall include representation of the site power system, the base quantities selected,
impedance source data, calculation methods and tabulations, one-line diagrams, conclusions and
recommendations.
E.
Provide the following:
1.
The available fault current at each bus within the limits of the study shall be identified and
listed.
2.
The momentary and interrupting rating of all elements of the distribution system shall be
listed. The maximum available fault current available at each element shall be calculated
3.
Determine the adequacy of the electrical protective devices to withstand the maximum
available fault at the terminals of the equipment. Provide an equipment list, the equipment
rating (both momentary and withstand), the maximum available fault rating and the
adequacy of the equipment to withstand the fault. The results shall be tabulated in the form
of a PASS/FAIL device evaluation table Equipment that does not have adequate ratings
shall be identified immediately and brought to the attention of the Engineer.
4.
The short circuit portion of the report shall include:
a. Executive summary describing the distribution system, the procedures used to develop
the study, utility related information furnished by the utility company including the
name and telephone number of the individual supplying the information, identify all
assumptions made in the preparation of the study, identify any problem areas and
provide a definitive statement concerning the adequacy of the distribution system to
interrupt and withstand the maximum possible fault current.
b. Computer printout of the input data.
c. Computer printouts for the three phase and ground fault studies. Printouts shall
indicate the fault current available at each major equipment, distribution bus within
the high, medium and low voltage distribution systems.
d. Table listing all the electrical distribution and utilization equipment (including VFDs),
the equipment interrupting and withstand ratings, the available fault current at the
terminals of the equipment and the ability of the equipment to interrupt and/or
withstand the fault.
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e.
F.
The short circuit study shall be prepared using approved computer software and must
include complete fault calculations as specified herein for each proposed and ultimate
source combination. Source combinations may include present and future Power
Company supply circuits, large motors, or generators.
Automatic Load Transfer
1.
1.07
June 2016
Provide a detailed study demonstrating the interrupting capacity of automatic transfer bus
ties and switches, as well as the fault withstand capabilities. The following shall be
considered:
a. X/R ratio fault-current of circuit at point of transfer.
b. X/R ratio and fault-current rating of the transfer device.
c. Length of time fault may persist prior to protective device opening.
d. Magnetic stress withstand rating.
e. I2t withstand rating.
f. Transfer device maximum interrupting duty compared to load interrupting duty.
PROTECTIVE DEVICE COORDINATION
A. Provide a protective device time-current coordination study in accordance with ANSI/IEEE Std.
242, with coordination plots of protective devices plus tabulated data, including ratings and
settings selected. In the study, balance shall be achieved between the competing objectives of
protection and continuity of service for the system specified, taking into account the basic
factors of sensitivity, selectivity and speed.
B.
Provide separate plots for each mode of operation: (1) "double-ended mode" (double-ended
substation with bus tie open); (2) "singled ended mode" (single incoming utility feeder
energized all switchgears single ended with bus ties closed); (3) "stand-by mode" (on-site
generation solely providing power to the system; (4) "peak shaving modes" (a.) (double-ended
substation with bus tie open with on-site generation paralleled) and (b) (single-ended with bus
ties closed with on-site generation paralleled). Show maximum and minimum fault values in
each case. Multiple power sources shown in one plot is not acceptable.
C.
Each primary protective device required for a delta-to-wye-connected transformer shall be
selected so the characteristic or operating band is within the transformer parameters, which,
where feasible, shall include a parameter equivalent to 58 percent of the ANSI C37.91
withstand curve to afford protection for secondary line-to-ground faults. Separate low voltage
power circuit breakers from each other and the associated primary protective device, by a 16
percent current margin for coordination and protection in the event of line-to-line faults.
Separate the protective relays by a 0.3-second time margin for the maximum 3 phase fault
conditions to assure proper selectivity.
D. The protective device characteristics or operating bands shall be terminated to reflect the actual
symmetrical and asymmetrical fault-currents sensed by the device. Provide the coordination
plots for 3 phase and phase-to-ground faults on a system basis. Include at least all devices down
to largest branch circuit and largest feeder circuit breaker in-each motor control center and/or
power distribution panelboard. Include all adjustable setting ground fault protective devices.
E.
Select relay types (i.e., inverse, very inverse, extremely inverse, over current with or without
voltage restraint, timers, etc.), current transformer ratings and types, fuse, residually or zero
sequence connected ground faults protection, etc., that will allow the system to be protected to
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June 2016
within the equipment fault ratings and provide the maximum possible coordination between the
protective devices.
F.
Multifunction Solid State Relays
1.
Where multifunction solid state relays are already installed, it shall be the responsibility of
the Contractor to obtain the current and complete list of software setpoints programmed
into the device. These setpoints shall be evaluated for potential impacts on the protective
device coordination.
2.
Where multifunction solid state relays are being install, it shall be the responsibility of the
Contractor to provide all setpoints needed for the specified operation of the relay. These
settings include but are not limited to:
a. The complete pickup settings of all protective elements specified by the designer and
shall not be limited to only the overcurrent pickup settings. Settings for protective
elements such as reverse power, synchronization, frequency and voltage control, etc.
shall be provided in full.
b. Differential pickup and zone settings necessary for the relay to operate as specified
and designed and to protect the zone it is intended for. Zone of protection calculations
and balance equations shall be completed entirely by the Contractor based on the
equipment as furnished and designed.
c. The complete protective relay logic map and logic equations. The relay logic is
responsible for translating the pickups of the protective elements into relay output
events and device trips. All logic necessary to create the specified output of the relay
based on the specified protective elements shall be furnished with the protective
device coordination report.
d. Any and all miscellaneous settings necessary for the relay to communicate with the
installation systems and the mirroring of data to other installation systems as specified
or designed.
3.
Contractor shall be responsible for the programming of relays prior to the field testing and
start up requirements of this contract. The Contractor shall be responsible for all time
needed to complete the relay settings in order to furnish a completely functional system as
specified and required by the approved protection device settings.
G. Arc Flash Mitigation and Reduction Modes
1.
Where devices are furnished with alternative trip settings intended to mitigate arc flash
hazards, the Contractor shall coordinate these alternative pickup settings and provide
representation of their tripping characteristics via TCC’s. The alternative pickup settings
shall be coordinate with the associated load and shall be set to provide the fastest device
response time while avoiding nuisance trips during normal plant operation.
H. The Time Current Characteristic (TCC) Curves shall include:
1.
The coordination plots shall graphically indicate the coordination proposed for the several
systems centered on full-scale log forms. The coordination plots shall include complete
titles, representative one-line diagrams and legends, associated upstream power system
relays, fuse or system characteristics, significant motor starting characteristics, significant
generator characteristics, complete parameters for power, and substation transformers,
complete operating bands for low voltage circuit breaker trip devices, fuses, and the
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associated system load protective devices. The coordination plots shall define the types of
protective devices selected, together with the proposed coil taps, time-dial settings and
pick-up settings required. The short-time region shall indicate the relay instantaneous
elements, the magnetizing inrush, and ANSI transformer damage curves, the low voltage
circuit breaker and instantaneous trip devices, fuse manufacturing tolerance bands, and
significant symmetrical and asymmetrical fault-currents.
1.08
2.
No more than six devices shall be shown on one coordination plot. Of these six curves, two
(the largest upstream device and the smallest downstream device) shall repeat curves
shown on other coordination plots in order to provide cross-reference. Give each curve in
the study a study-unique number or letter identifier to permit cross-reference between
plots.
3.
The coordinating time interval between primary and back-up protective devices shall be as
per Table 15-3, Section 15.6, IEEE Std. 242-2001.
4.
Include a detailed description of each protective device identifying its type, function,
manufacturer, and time-current characteristics. Tabulate recommended device tap, time
dial, pickup, instantaneous, and time delay settings. A tabulation shall include settings for
every overcurrent protective device, timer, power system relays (e.g., ANSI 25, 27, 32, 67,
87, etc.), circuit breaker, recommended fuse and current transformer ratings, etc. Include
C.T. ratio, burden and all other calculations required for the determination of settings.
Provide recommended settings for all protective devices furnished under Division 16 and
furnished with those furnished with Variable Frequency Drives and associated
transformers, generators and associated paralleling and distribution switchgear.
ARC FLASH
A. Provide an arc flash study that utilizes the fault current values calculated in the short circuit
study and the minimum clear times of the upstream protective device selected in the
coordination study to calculate the incident energy at each fault location.
B.
The Arc Flash study shall be in accordance with the procedure outlined in NFPA 70E.
C.
Calculate the incident energy levels at each faulted bus for each mode of operation: (1) "doubleended mode" (double-ended substation with bus tie open); (2) "singled ended mode" (single
incoming utility feeder energized all switchgears single ended with bus ties closed); (3) "standby mode" (on-site generation solely providing power to the system; (4) "peak shaving modes"
(a.) (double-ended substation with bus tie open with on-site generation paralleled) and (b)
(single-ended with bus ties closed with on-site generation paralleled). Determine arc flash
incident energy values for both maximum and minimum fault values in each case.
D. Extent of Study
1.
The arc flash study shall include analysis for all equipment that would normally be
serviced while energized and cannot be easily shut down during maintenance periods. The
contractor shall coordinate with the owner to ensure that all equipment that is expected to
be analyzed is included in the study. The extent of the analysis includes but is not limited
to:
a. Switchgear, MCC’s and distribution equipment
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b.
c.
E.
June 2016
Low voltage lighting panels, even those covered by certain calculation exceptions
must be modeled and provided with a unique device label
Low voltage control equipment such as 120-600V control panels.
Arc Flash Labels
1.
The arc flash study shall produce a single set of label templates that shall not be printed
until the final arc flash study has been approved.
2.
A single set of labels shall be printed and affixed to the equipment analyzed if the
equipment is continuous. Double ended equipment shall have individual labels for each
side of the gear. Equipment that is not continuous shall have a single label placed on each
piece of continuous gear.
3.
Where applicable, LINE and LOAD labels shall be produced for equipment. Examples of
equipment that require these labels include the main breakers of switchgear and MCC’s. In
these cases, the LINE side breakers shall be affixed to indicate the hazard associated with
the line side of the equipment and the LOAD label shall be affixed to indicate the hazard
associated with the rest of the gear.
4.
Labels shall be affixed where they are clearly identifiable with the equipment they depict.
Labels shall not obscure any other signage on the equipment unless they are used to
completely cover a previous arc flash label.
5.
Labels shall meet the following requirements:
a. Labels shall be indoor/outdoor rated weather resistant vinyl or polyester with a UV
resistant over laminate. The label shall have a minimum thickness of 5 mil. Labels
shall be backed with pressure sensitive permanent cold temperature adhesive rated for
a minimum 5 year life in the environment in which they are installed.
b. All lettering shall be black and printed via thermal transfer. Backgrounds shall be
orange for hazard risk categories 1-4 and red for “Dangerous” areas.
c. Where subjected to degrading or corrosive environments, the labels shall be provided
with a tinted fiber glass cover.
d. The label shall match any pre-existing facility or client specified formatting. The
contractor shall be responsible for obtaining this formatting information prior to
submitting label templates.
e. A single label for equipment is acceptable where equipment is continuous. In the
event of split busses or equipment not arranged in a continuous fashion, multiple
labels shall be provided.
f. Line side labels for equipment main breakers shall be included in addition to load side
labels.
g. Labels shall be DANGER/WARNING type conforming to the NFPA 70E and ANSI
Z534.4 standards. Labels are required to have the minimum information specified by
these standards printed on them. Labels shall be legible and standard throughout the
plant.
h. Labels templates shall be provided to the engineer and client for final approval and
shall be printed and affixed by the contractor. Contractor shall be responsible for all
work required to print and affix the labels to the equipment. Labels shall be affixed in
accordance with the direction of the client.
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6.
F.
June 2016
Contractor shall produce all arc flash labels and coordinate affixing them onto all
equipment.
Arc Flash Mitigation and Reduction Devices
1.
Where devices are furnished with alternative trip settings intended to mitigate arc flash
hazards, the Contractor shall provide an alternative arc flash lookup table associated with
these alternative settings.
2.
Labels shall have only the worst case hazard risk category (without the arc flash reduction
settings) depicted. Multiple labels for different device settings shall not be accepted.
3.
Devices such as differential protection relays which limit incident energy by limiting the
magnitude of the available fault and/or minimizing the fault clearing time may be used to
calculate hazard risk categories. The use of these devices in the calculations shall only be
permitted where permitted by the standards and code guidelines used to complete the arc
flash analysis. If not explicitly stated by the standard as an acceptable method for
calculating arc flash hazard, it shall not be permitted.
G. Arc Flash Hazard Mitigation
1.
Acceptable hazard risk categories shall be coordinated by the contractor between the owner
and engineer. Where there are no guidelines determining acceptable arc flash levels, the
Contractor shall actively attempt to reduce all hazard risk categories greater than 2.
Contractor shall list all areas greater that category 2 in the conclusion of the report and
shall give reasons for the high incident energy.
2.
The Contractor shall be responsible for proposing and evaluating arc flash mitigation
measure including but not limited to:
a. Adjustment of protective devices in an attempt to better balance the system
coordination and the incident energy available to an arcing fault.
b. Equipment that could be used to physically remove the operator from the arc flash
hazard boundary (mimic panels, remote switching/racking).
c. Equipment that could be used to limit the amount of incident energy or reduce the
protective device pickup time (maintenance mode bypass, differential relaying).
3.
Proposing an evaluating these arc flash mitigation measures shall include evaluating the
cost and implementation of the options as well as reevaluating and reporting the hazard
risk category associated with their installation.
PART 2 PRODUCTS (NOT USED)
PART 3 EXECUTION
3.01
QUALITY ASSURANCE
A. Adjust relay and protective device settings according to values established by coordination
study. Setting shall be made in accordance with Section 16000.
B.
Make minor modifications to equipment as required to accomplish conformance with the short
circuit and protective device coordination studies.
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C.
June 2016
Notify Consulting Engineer in writing of any required major equipment modifications.
END OF SECTION
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June 2016
SECTION 16121
MEDIUM VOLTAGE CABLE
PART 1 GENERAL
1.01
SCOPE OF WORK
A. Furnish, install and test the medium voltage cables and accessories as shown on the Drawings
and as specified herein.
B.
This Section shall apply to all temporary and permanent feeders used on the project.
1.02
RELATED WORK
1.03
SUBMITTALS
A. Shop drawings and product data in accordance with GP-50-03, showing materials of
construction and details of installation:
B.
C.
Submit, in accordance with GP-50-03, the following:
1.
Product data sheets
2.
Factory and field test reports
3.
Cable samples
4.
Pulling tension and sidewall pressure calculation
Statement of Qualifications:
1.
Cable Accessories: The manufacturer shall be able to document a minimum of five years
successful field experience as well as demonstrating technical life assessment as requested.
The manufacturer shall establish and document a Quality Assurance Program
implementing suitable procedures and controls for all activities affecting quality. The
program shall provide documentation that verifies the quality of production joint kits and
traceability back to inspection records, raw material and the original designs and design
proof tested joints.
D. Warranties:
1.
1.04
Cable: The manufacturer shall warrant the cable against failures for a period of 20 years
from date of installation and shall remove and replace failed cables at his own expense
during this warranty period.
REFERENCE STANDARDS
A. Medium voltage cables shall meet or exceed the specifications and requirements of the latest
Insulated Cable Engineers Association (ICEA) and the Association of Edison Illuminating
Companies (AEIC) publications, except as modified by this Section.
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B.
Ethylene-propylene rubber (EPR) insulated shielded cable shall meet or exceed ICEA S-93-639,
NEMA WC-74, CSA 68.3 and AEIC CS-8.
C.
Ethylene-propylene rubber (EPR) insulated non-shielded cable shall meet or exceed ICEA S96-659 and NEMA WC-71.
D. Cables shall comply with Underwriters Laboratories (UL) Standard 1072.
E.
Cables shall comply with IEEE 383 and IEEE 1202 Flame Tests where installed within
buildings.
F.
Field testing and commissioning shall be done in accordance with the latest revision of the
"Acceptance Testing Specifications for Electrical Power Distribution Equipment and Systems"
published by the International Electrical Testing Association (NETA Standard ATS-2005)
unless otherwise modified by this Section.
G. National Electrical Code (NEC) NFPA 70.
H. Where reference is made to one of the above standards, the revision in effect at the time of bid
opening shall apply.
1.05
QUALITY ASSURANCE
A. Qualifications:
1.06
1.
Cable: The general construction of the cable and the insulation material used shall be
similar to that used for cable of the same size and rating in continuous production for at
least 20 years and successfully operating in the field in substantial quantities.
2.
Cable: Upon request, the manufacturer shall submit a copy of his Quality Assurance
Manual detailing the quality control and quality assurance measures in place at his facility.
3.
Cable: The manufacturer shall have available for audit detailed descriptions of the method
by which his various manufacturing processes and production test are recorded, thus
enabling the "traceability" of the completed cable. All steps in the manufacturing process,
from receipt of raw material to the final tests, are to be included. Where multiple records
are used, the method for cross-referencing shall be noted.
4.
Cable shall be UL listed as Type MV-105.
DELIVERY, STORAGE AND HANDLING
A. Acceptance at Site:
1.
B.
Check for reels not completely restrained, reels with interlocking flanges or broken flanges,
damaged reel covering or any other indication of damage.
Storage and Protection:
1.
Unload reels using a sling and spreader bar or by two lifting forks perpendicular to the reel
ends. The lift shall not contact the cable.
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2.
Roll reels in the direction of the arrows shown on the reel and on surfaces free of
obstructions that could damage the cable.
3.
Do not drop reels from any height.
4.
Store cable on a solid, well drained location. Unjacketed armored cable shall be stored
indoors. Cover cable reels with plastic sheeting or tarpaulin. Do not lay reels flat.
5.
Seal cable ends with heat shrinkable end caps. Do not remove end caps until cables are
ready to be terminated.
PART 2 PRODUCTS
2.01
GENERAL
A. The use of a manufacturer's name and model or catalog number is for the purpose of
establishing the standard of quality and general configuration desired.
B.
The manufacturer's name, the voltage class, type of insulation, thickness of insulation,
conductor size, UL listing and date of manufacture shall be printed on the jacket.
C.
Cables shall be suitable for use in partially submerged wet locations, in non-metallic or metallic
conduits, underground duct systems and direct buried installation.
D. Cables shall be able to operate continuously at 105 degrees C conductor temperature, with an
emergency rating of 140 degrees C and a short circuit rating of 250 degrees C. Emergency
overloads shall be possible for periods of up to 500 accumulative hours during the life time of
the cable.
E.
Medium voltage cable shall be shielded unless specifically shown otherwise on the Drawings.
F.
Medium voltage cables shall have the following physical characteristics in accordance with
ICEA, AEIC and UL standards:
1.
Conductors: Annealed, uncoated Class B copper, compressed concentric lay, stranded per
ASTM B-8 or compact concentric stranded per ASTM B-496.
2.
Insulation: Thermosetting dielectric based ethylene propylene rubber (EPR) compound
over an extruded, non-conducting high dielectric stress control strand screen layer, with a
semi-conducting screen layer applied directly over the primary insulation.
G. Acceptable manufacturers:
1.
Okonite Company, Inc.
2.
General Cable Co.
3.
The Kerite Company
4.
Or approved equal
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2.02
June 2016
CABLE SHOP TESTING
A. Perform manufacturers standard production testing and inspection in accordance with Section 6
of the referenced ICEA standards. If requested by the Engineer, the manufacturer shall submit
certified proof of compliance with ICEA design and test standards.
B.
Provide certified test reports indicating that the cable has passed the following tests:
1.
C.
2.03
Vertical tray flame test in accordance with IEEE 1202 where applicable to the size cable.
Pulling Eyes: After completion of the factory test on cut lengths of cable, individual pulling
eyes shall be installed on single or triplexed conductor length of cable. Pulling eyes shall be
suitable for maximum allowable pulling tension on the conductors and they shall be sealed
against entrance of water.
CABLE RATINGS AND TYPE
A. 15 kV Cable
2.04
1.
Cable type: Single conductor.
2.
Insulation level as required as required by UL 1072: 220 mils/133 percent.
3.
Operating voltage; 13,200 Volts, 3 Phase, 60 Hz, grounded distribution system.
CABLE SHIELDING SYSTEM
A. Insulation Shield
1.
B.
C.
The insulation shield shall consist of a layer of semi-conducting material extruded directly
over the insulation.
Metallic Shield
1.
5 mil copper tape helically applied with a nominal 25 percent overlap.
2.
Longitudinally applied corrugated tin coated copper wires embedded in the insulation
shield.
3.
33 percent rated concentric neutral (URD) copper conductors wrapped around a semiconducting polymer jacket.
Cable Jacket
1.
Provide an overall, moisture, heat, abrasion, UV and ozone resistant jacket over the
metallic shield. Jacket material shall be chlorosulfonated polyethylene (CSPE/Hypalon),
Low Smoke Zero Halogen.
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2.05
June 2016
CABLE ACCESSORIES
A. General
B.
C.
1.
Cable termination and splicing material shall be as manufactured by Raychem; 3M Corp.;
Elastimold or equal. All material used in terminating and splicing medium voltage cables
shall be as recommended by the cable manufacturer. Cables shall be terminated and spliced
in accordance with the kit supplier's Drawings.
2.
Cable terminations shall meet or exceed IEEE Standard 48, Class I requirements.
3.
EP insulated cable splices shall be hand wrapped and shall meet or exceed the requirements
of ANSI C119.1 and IEEE 404.
4.
Cable accessories shall be by one manufacturer to assure adequate installer training and
application assistance.
Indoor Cable Termination (15 kV)
1.
Single conductor shielded cable terminations for indoor applications shall be one piece,
track resistant EPDM rubber with top seal and ground strap assemblies.
2.
Termination shall have a current rating equal to, or greater than the cable ampacity.
3.
Termination shall accommodate any form of cable shielding or construction without the
need for special adapters.
4.
Acceptable products:
a. 3M Corp. Cold Shrink Quick Term QT III, 7620-T Series.
b. Raychem Corp., HVT Series.
c. Elastimold, Separable Connectors
Outdoor Cable Terminations (15 kV)
1.
Single conductor shielded cable terminations for outdoor protected or exposed locations
shall be one piece, track resistant silicone rubber with top seal, rain skirt and ground strap
assemblies. Cable compartments of outdoor metal clad switchgear shall be considered as
outdoor locations.
2.
Termination shall have a current rating equal to, or greater than the cable ampacity.
3.
Termination shall accommodate any form of cable shielding or construction without the
need for special adapters.
4.
Acceptable products:
a. 3M Corp. Cold Shrink Quick Term QT III, 7620-S Series.
b. Raychem Corp., HVT Series.
c. Elastimold, PCT-1/35.
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D. Single conductor 15 kV concentric neutral cable terminations shall be 3M Corp., Cold Shrink
7640-T Series (Indoor), Cold Shrink 7640-S Series (Outdoor), except where load break elbows
are specified in Section 16431.
E.
F.
Tape Shielded Inline and Tee and Multi-point Cable Splice
1.
Splice all shielded cables rated 15,000 Volts or less with conductor sizes ranging from No.
4 to 1,000 Kcmil in accordance with the instructions provided with inline cold shrink splice
kits, 3M Corp. QS-III, 3M Scotch Brand Tape Splicing Kits 5717, 5718, 5719 and 5720,
Raychem Corp., CAS Series, or equal.
2.
Shielded cable splices shall be capable of normal continuous operations at the rated voltage
and current on the cable it is to be used on (15 kV maximum). The splice kit shall contain
all of the necessary materials required to make three splices including cable preparation
materials, such as solvents, rags and abrasive materials. The primary insulating tape shall
be an all-voltage linerless tape. A comprehensive step-by-step instruction sheet shall be
included with each kit.
3.
Separable connector system 15 kV Class 200 AMP Loadbreak, rack installation in
accordance with the instructions provided with the connector system by 3M Corp.
5810/5811 Loadbreak Series; 5815 Modular Technology Series, or equal by Raychem,
Elastimold, or equal.
Transition Splices
1.
Splice transition from PILC to EPR cables shall utilize an oil stop design equal to Adalet,
Type 35TT, MAC Products, Type RP1T/RP3T or 3M Corp. QS-2000T Series.
G. Heat Shrinkable Bus Connection Kits
1.
Bus kits shall be capable of insulating bus bars 2-in to 6-in wide and for connection of one
to four cables. Kits shall electrically insulate and environmentally seal the connection and
be easily re-enterable.
2.
Cable-to-bus bar connection kits shall be rated up to 15 kV class and tested in accordance
with ANSI C37.20c, Section 5.2.1.4 Test for Bus Bar Insulation and Section 5.2.9 FlameRetardant Test for Applied Insulation. Kits shall be Raychem Corp., Type HVBC, or equal
by 3M Corp., Elastimold, or Engineer approved equal.
H. Cable end caps shall be heat shrinkable polyelofin, 3M Corp., Type SKE, or equal.
I.
Lugs and Connectors
1.
Copper lugs and connectors shall be crimped with standard industry tooling. All
connections of copper stranded wire in sized No. 6 AWG through 1000 kcmil shall be
made electrically and mechanically secured. The lugs and connectors shall have a current
carrying capacity equal to the conductors for which they are rated and meet UL 486
requirements. Lugs larger than 4/0 AWG shall be two-hole lugs with NEMA spacing. The
lugs and connectors shall be rated for operation through 35 kV. The lugs shall be of closed
end construction to exclude moisture migration into the cable conductor.
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J.
June 2016
Electrical Grounding Braid
1.
Conducting metal braid shall be woven from 240 strands of 30 AWG tinned copper wires
and be capable of carrying fault current comparable to that of 6 AWG copper wire, 3M
Corp., Scotchbrand 25, or equal.
K. Cable Marking Systems
L.
1.
A 7-mil, flame retardant, cold and weather-resistant vinyl plastic electrical tape shall be
used for phase identification, 3M Corp.; Scotch 35 Tape, or equal.
2.
Cable tags shall be heat stamped nylon secured by polypropylene cable ties, Thomas &
Betts No. TC228-9, or equal.
Separable Surge Arresters
1.
2.06
MOV surge arresters with IEEE 386 interface, fully shielded, fully submersible, 15 kV
Class, type BSA Elastimold, or equal.
PULLING COMPOUNDS
A. Pulling compound shall be nontoxic, nonflammable, noncombustible and noncorrosive. The
material shall be UL listed and compatible with the cable insulation and jacket.
B.
Acceptable manufacturers are Ideal Company; Polywater, Inc.; Cable Grip Co., 3M Corp. WL
Series, or equal.
PART 3 EXECUTION
3.01
GENERAL
A. Determine the cutting lengths, reel arrangements and total lengths of cable required and shall
furnish this data to the cable manufacturer as soon as possible to assure on-time delivery of
cable.
B.
3.02
Make use of the field engineering services available from the cable manufacturer.
INSTALLATION
A. Install cable and cable accessories as required or shown on the Drawings and in accordance
with manufacturer's instructions and approved shop drawings.
B.
Cable Installation
1.
When temperature is below 50 degrees F, cable reels shall be stored at 70 degrees F for at
least 24 hours before installation.
2.
Do not exceed manufacturer's recommendations for maximum pulling tensions and
minimum bending radii.
3.
Use loose pulling eyes unless factory pulling eyes have been installed.
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C.
June 2016
4.
Pull cables from direction that requires the least tension.
5.
Feed cables into raceway with zero tension and without cable crossover at raceway
entrance.
6.
Provide continuous monitoring of cable tension during the cable pull. Owner shall witness
the cable installation and tension. Submit certified field testing reports indicating cable
tensions during the pull to the Engineer within five days of the completion of the
installation.
Splicing and Terminating
1.
Cables shall be installed with a minimum of splices. Proposed splice locations shall be
submitted to the Engineer for approval.
2.
Splices and terminations shall be made with either manufactured splice and termination
kits or premolded cable accessory components.
3.
Separable connector junctions and accessories shall be mounted on a metal rack system.
4.
The work area shall be kept warm, dry and ventilated during splicing and terminating of
the cables.
5.
Splicing and terminating shall be performed by electricians having at least 80 hours of
formal training and a minimum of five years field experience in this type of work.
6.
Prepare cables in accordance with splice or termination kit manufacturers installation
details.
7.
Clean cables for splicing or terminating with cleaning kits included with the splice or
terminating kit. If a cleaning kit is not provided with the kit use a 3M Corp. CC-2
preparation kit, or equal.
8.
Maintain shield continuity around splices. Bond cable shields at each terminal or splice
location.
9.
Install a neoprene tape wrap around each splice and bonding jumper to provide a watertight
environmental seal.
10. Insulate and seal each cable-to-bus termination with heat shrinkable bus connector kits.
D. Electric Arc and Fire Proofing
1.
In manholes, cable trays and exposed locations where threat of fire exists or communicated
fault can occur, wrap medium voltage cables with one half-lapped layer of Scotch Brand
77 Electric Arc and Fireproofing Tape. Tape shall be secured with a two-layer band of
Scotch Brand 69 Glass Electrical Tape over the last wrap.
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E.
Marking and Identification
1.
3.03
June 2016
Plastic nameplates shall be installed in each manhole, pull box and at splice and
terminating points. These nameplates shall show the phase and feeder designations and the
date when the cable was installed or splice or termination was made. The feeder
designation shall be as indicated on the Drawings. Nameplates shall be tied to each cable
with self-locking nylon ties.
FIELD TESTING
A. Inspect and test the installed cables prior to energization. Provide all material, labor, equipment
and technical supervision to perform the tests and inspection. Notify the Owner at least two
weeks prior to scheduling any testing.
B.
C.
Equipment testing and inspection shall be performed in accordance with NETA Standard ATS
and shall include the following:
1.
Visual and mechanical inspection.
2.
Shield continuity test.
3.
Insulation resistance test.
4.
DC Hipot test per IEEE Standard 400.
When new cables are spliced into existing cables, the DC high potential test shall be performed
in accordance with Paragraph 3.03B above on each old and new cable prior to splicing. After
test results are approved and the splice is completed, an insulation resistance test and a shield
continuity test shall be performed on the length of new and existing cable including the splice.
After a satisfactory insulation resistance test, a DC high potential test shall be performed on the
cable utilizing a test voltage recommended by the testing firm and approved by the Engineer.
D. Submit certified copies of the test results and leakage plots to the Owner in accordance with
GP-50-03 within five days of completion of the tests.
E.
Immediately notify the Owner and do not energize the cables if any of the following conditions
occur:
1.
Cable damage.
2.
Improper installation or grounding.
3.
Shield discontinuity or high resistance.
4.
Dielectric absorption ratio and polarization index below 1.5.
5.
Abnormal plot of leakage current versus voltage.
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F.
June 2016
Defective or Damaged Cables
1.
The Engineer shall make sole determination of the acceptability of the cables based on the
submitted test reports. Do not energize cables until the test reports have been reviewed and
approved by the Engineer.
2.
If, in the opinion of the Engineer, the cables, terminations or splices are determined to be
damaged or defective, provide the following remedial actions at no additional cost to the
Owner:
a. Remove splices and terminations and completely re-test the cables to determine
whether the cables are damaged or defective.
b. Remove and replace damaged or defective cables as directed by the Engineer.
c. Remake terminations and splices with new kits.
d. Completely re-test cable, splices and terminations in accordance with Paragraph
3.03B above.
END OF SECTION
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SECTION 16380
MEDIUM VOLTAGE LOAD INTERRUPTER SWITCHES
PART 1 GENERAL
1.01
SCOPE OF WORK
A. Furnish all labor and materials required and installed. Complete as shown on the Drawings and
as specified herein.
B.
1.02
Furnish and install the metal-enclosed medium voltage load interrupter (MEI) switches
equipment as shown on the Drawings and as specified herein.
RELATED WORK
A. Substation transformers and low voltage switchgear are included in other Supplemental
Specifications within Division 16.
B.
Concrete for equipment pad is included in P-610.
C.
Concrete for equipment pads shall be furnished under this Section and comply with P-610.
D. Excavation shall be furnished under this Section and comply with P-152.
1.03
SUBMITTALS
A. Submit shop drawings and product data in accordance with GP-50-03.
B.
Shop drawings shall include the following information.
1.
Master drawing index
2.
Front elevation view
3.
Floor plan layout
4.
Top view
5.
Dimensions, weight, and shipping splits
6.
Single line diagrams
7.
3-phase elementary and schematic diagrams
8.
Nameplate schedules
9.
Component list including metering, accessories and control equipment
10. Conduit entry/exit locations
11. Assembly ratings including
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a.
b.
c.
d.
June 2016
Short-circuit rating
Voltage
Continuous current
Bus material and ratings
12. Major component ratings including
a. Voltage
b. Continuous current
c. Interrupting ratings
d. Basic impulse level
13. Cable terminal lug sizes
14. Product data sheets and catalog numbers for fuses and components. List all options and
accessories furnished specifically for this project.
C.
Submit the following additional information where applicable
1.
Busway connection
2.
Connection details between close-coupled assemblies
3.
Composite floor plan of close-coupled assemblies
4.
Key interlock scheme drawing and sequence of operations
5.
Detailed shop drawings of the utility metering compartment to the Power Company for
review.
D. Design Data
E.
1.
Provide manufacturer's published time-current curves of the fuses.
2.
Provide seismic anchoring details, coordinated with the equipment mounting provision,
prepared and stamped by a licensed professional engineer. Mounting recommendations
shall be based upon manufacturers shake table tests used to verify the seismic design of the
equipment.
Test reports
1.
When requested, submit design test reports. Furnish documentation showing the results of
design tests on a product of the same series and rating as that provided by this
specification.
2.
Submit production test reports showing results of testing performed on the actual
equipment for this project. These tests include:
a. 60-hertz dielectric tests
b. Mechanical operation tests
c. Instrument transformer case grounding tests
d. Electrical operation and control wiring tests
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3.
F.
June 2016
Submit field test reports showing results of testing performed on the actual equipment for
this project.
Submit manufacturer's installation instructions for the complete assembly and each major
component:
1.
Shipping, storage, and handling instructions
2.
Installation bulletins
3.
Supplemental instruction bulletins.
4.
Application software
5.
Instructions necessary for proper seismic mounting of the equipment.
G. Statement of Qualifications
1.
When requested, submit qualifications of factory service representatives for approval.
2.
When requested, submit an acceptable list of installations with similar equipment to
demonstrate compliance with this specification.
H. Manufacturer's Field Report
1.
I.
J.
When requested, submit manufacturers field inspection reports.
Project Record Documents:
1.
Submit record document information in accordance with GP-50-03.
2.
Submit the following information for record purposes:
a. A complete set of manufacturers "As Built" shop drawings incorporating all changes
made during the manufacturing process.
b. "As Built" point-to-point wiring diagrams for metering and control circuits. Show
wire and terminal numbers.
c. Field wiring interconnection drawings illustrating all field components and electric
connections to the systems supplied under this Section.
3.
Furnish electronic copies of switchgear drawings, one-lines, and wiring diagrams in
AutoCAD native file format. Drawings shall include any field modifications or changes to
reflect actual as built conditions after completion of start-up and final acceptance by the
Owner.
Operation and Maintenance Data
1.
Submit operation and maintenance manuals in accordance with GP-50-03.
2.
Provide equipment operation and maintenance manuals with each shipped assembly
including instruction leaflets, instruction bulletins and renewal parts lists for the complete
assembly and each major component.
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3.
1.04
June 2016
Manuals shall include the following as a minimum:
a. A comprehensive index.
b. A list of the equipment supplied, including serial numbers, ranges and pertinent data.
c. Full product specifications for each item.
d. Service, maintenance and operation instructions for each item.
e. Special maintenance requirements particular to this system shall be clearly defined,
along with set up and test procedures.
f. Renewal parts list with stock numbers.
REFERENCE STANDARDS:
A. American National Standards Institute (ANSI)
B.
1.
ANSI/IEEE C37.20.3 Standard for Metal-Enclosed Interrupter Switchgear
2.
ANSI C37.20.4 - Standard for Indoor AC Switches (1 kV-28kV) for Use in MetalEnclosed Interrupter Switchgear
3.
ANSI/IEEE C37.22 - American National Standard Preferred Ratings and Required
Capabilities for Indoor AC Medium-Voltage Switches Used in Metal-Enclosed Switchgear
4.
ANSI/IEEE C57.13 Requirements for Instrument Transformers
5.
ANSI C37.90.1 - Surge Withstand Capability (SWC) Tests for Relays and Relay Systems
Associated with Electric Power Apparatus
National Electrical Manufacturers Association (NEMA)
1.
C.
NEMA SG5 – Power Switchgear Assemblies
Electrical Equipment Manufacturers Association of Canada (EEMAC).
1.
EEMAC G8-3.3 Metal-Enclosed Interrupter Switchgear Assemblies
D. National Fire Protection Association (NFPA)
1.
E.
International Electrical Testing Association (NETA)
1.
F.
1.05
NFPA 70 - National Electric Code.
NETA ATS - Acceptance Testing Specifications.
Where reference is made to one of the above standards, the revision in effect at the time of the
bid shall apply.
QUALITY ASSURANCE
A. Qualifications
1.
The equipment furnished under this Section shall be the product of a manufacturer who has
produced this same type of equipment for a period of at least ten consecutive years.
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B.
C.
1.06
June 2016
2.
The switchgear equipment shall be designed, assembled and tested by the manufacturer of
the major components and circuit protective devices used within the switchgear assembly.
3.
Manufacturer shall maintain permanent records of the production test results.
Regulatory Requirements
1.
Equipment, materials, installation, and workmanship shall be in accordance with the
mandatory and advisory provisions of NFPA 70 (NEC) unless more stringent requirements
are specified or indicated.
2.
The equipment and major components shall be suitable for and certified to meet all
applicable seismic requirements of the International Building Code (IBC) for zone 4
application. Guidelines for the installation consistent with these requirements shall be
provided by the manufacturer and be based upon testing of representative equipment. The
test response spectrum shall be based upon a 5% minimum damping factor, IBC: a peak of
2.45g's (3.2-11 Hz), and a ZPA of 0.98g's applied at the base of the equipment. The tests
shall fully envelop this response spectrum for all equipment natural frequencies up to at
least 35 Hz.
Certifications
1.
The manufacturer shall maintain a documented ISO 9001 or 9002 quality assurance
program implementing suitable procedures and controls to monitor all aspects of
production and testing.
2.
The switchgear shall be UL certified. Design tests, to verify ANSI/IEEE ratings shall be
documented as required by ISO 9001 and available for review and inspection.
3.
Integrated fuse/switch momentary and fault close ratings shall have been verified by test
and UL and CSA certified.
4.
The equipment manufacturer shall certify that the equipment will function following a
seismic event, including both vertical and lateral required response spectra referenced in
the specified codes.
SYSTEM DESCRIPTION
A. General
1.
Furnish and install free-standing, metal-enclosed load interrupter (MEI) switches
consisting of dead front, completely metal-enclosed vertical sections containing load
interrupter switches and fuses of the rating and type as specified or indicated on the
Contract Drawings.
2.
Provide a transition compartment as needed to close couple to a transformer or unit
substation equipment shown on the Drawings. Insulating barriers shall isolate the
switchgear bus from the transformer enclosure.
3.
Provide outdoor rated enclosures where required for outdoor locations as shown on the
Drawings.
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B.
System Responsibility:
1.
C.
June 2016
Equipment specified under this Section shall be furnished as an integrated assembly by the
manufacturer who shall have sole responsibility for furnishing all the parts and components
required for a complete and operable system.
Design Requirements:
1.
Nominal Voltage Rating: 13.2 kV, three phase, three wire, solidly grounded, 60 hertz
system.
2.
All switches shall be rated to withstand mechanical forces exerted during short-circuit
conditions at the available fault current. Coordinate with the Owner to confirm available
current or match short circuit ratings of the next upstream equipment.
3.
The equipment and components shall operate continuously at its rated current under the
specified environmental conditions without damage or degradation of operating
characteristics or life:
a.
b.
c.
d.
e.
Operating Ambient Temperature: 0 degrees C to 40 degrees C maximum ambient
temperature.
Storage Temperature: -30 degrees C to 65 degrees C.
Relative Humidity: 0 to 95%, non-condensing.
Altitude: Operating to 6500 ft, de-rate for higher elevations.
Vibration: Per IBC or State Code
4.
The bus shall be designed to carry its rated continuous current in the specified ambient
temperature without exceeding the temperature rise limits specified in ANSI Standard
C37.20.2.
5.
Minimum short circuit interrupting rating: buses, bus supports and connections shall
withstand stresses that would be produced by currents equal to the momentary ratings of
the switches, and shall be braced to withstand the specified fault currents.
6.
Switchgear shall be capable of extension from either end at a future date without
modification to existing structural members.
7.
The manufacturer shall develop logic and interlocks and provide all programming as
required to implement the key interlocking schemes, metering and network
communications as specified and indicated on the Drawings.
D. Performance Requirements – 15kV Equipment
1.
Main bus continuous current rating: 600A. Bus connections to switches shall be rated to
carry the full continuous current of the device.
2.
Switch ratings: per ANSI Standard C37.22.
a. Maximum Voltage: 15 kV
b. BIL Rated: 95 kV
c. Continuous and load break current ratings shall be 600 Amperes
d. 2-Second short circuit current rating: 38 kA RMS Symmetrical
e. Momentary and fault closing rating: 60 kA RMS Asymmetrical
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E.
1.07
June 2016
Power System Coordination and Protection
1.
Provide a coordinated power system as specified in Section 16425.
2.
The switchgear manufacturer shall confirm all fuse ratings agree with the coordination
study recommendations.
DELIVERY, STORAGE AND HANDLING
A. Packing and Shipping
B.
1.
Equipment shall be handled and stored in accordance with manufacturer's instructions.
2.
Shipping groups shall be designed to be shipped by truck. Indoor groups shall be bolted to
skids. Fuses and accessories shall be packaged and shipped separately.
Acceptance at Site
1.
C.
Storage and Protection
1.
1.08
Switchgear shall be equipped to be handled by crane. Where cranes are not available,
switchgear shall be suitable for skidding in place on rollers using jacks to raise and lower
the groups.
Refer to Section 16000.
PROJECT/SITE REQUIREMENTS
A. General Requirements
B.
1.
Provide dry protected storage for all equipment.
2.
Coordinate with the Owner and provide equipment in accordance with Owner’s directives.
Field Measurements
1.
1.09
Make all necessary field measurements to verify that equipment will fit in allocated space
in full compliance with minimum required clearances specified in National Electrical
Code.
MAINTENANCE
A. Provide the following materials in the quantity specified. Materials shall match those installed
in all respects and where possible shall come from the same production lot. Materials shall be
properly packaged for long storage and containers shall be clearly and indelibly labeled on the
exterior.
1.
One quart of touch-up paint.
2.
One dozen each of cover bolts, spring nuts and door fasteners.
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B.
Spare Parts
1.
Provide the following spare parts for each switch in the quantities specified:
a.
b.
c.
d.
e.
2.
C.
1.10
June 2016
Three replacement power fuses or refills for each switch.
One arc chute assembly.
One main interrupter blade assembly.
Two switch insulators and connector links.
One set of replacement fuses.
Spare parts shall be boxed or packaged for long term storage and clearly identified on the
exterior of package. Identify each item with manufacturers name, description and part
number.
Tools
1.
One fuse handling tool
2.
One set of three 10 ft grounding jumpers and storage bags.
3.
One audio visual voltage tester with batteries, storage case and clamp stick adapter.
4.
One shotgun clamp stick with canvas storage bag.
WARRANTY:
A. Provide a one year warranty on parts and labor for a minimum of one year after final
acceptance.
1.11
NOMENCLATURE AND IDENTIFICATION
A. Provide engraved laminated plastic nameplates on all doors for unit load description and for
each control or indicating device. Nomenclature shall be as shown on the Drawing or as
directed, using lettering approximately 3/8-in high for unit identification nameplates and 1/4-in
high elsewhere. The nameplates shall use white letters on a black background. The engraving
shall extend through the black exterior lamination to the core. Nameplates shall be screw
fastened.
B.
The manufacturer shall fasten a master NEMA nameplate to the front of the switchgear
indicating model number, serial number, order number, manufacturing date, bus amperes, volts,
overall short circuit rating, etc.
C.
Each switch shall be identified with an individual serial number permanently mounted by means
of a metal nameplate.
D. Provide permanent electrical hazard warning signs marked per OSHA requirements.
E.
Provide permanent arc flash PPE signs.
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1.12
June 2016
MANUFACTURERS' SERVICES
A. Provide services of a manufacturer's service representative for testing and start-up, as required
in Section 16000.
B.
Provide services of a manufacturer's service representative for training, as required in Section
16000.
PART 2 PRODUCTS
2.01
GENERAL
A. The use of a manufacturer's name and model or catalog number is for the purpose of
establishing the standard of quality and general configuration desired.
B.
C.
2.02
Products of the following manufacturers are acceptable.
1.
Eaton / Cutler-Hammer
2.
General Electric
3.
S&C Electric
4.
Square D – HVL
5.
Or approved equal.
Like items of materials/equipment shall be the end products of one manufacturer in order to
provide standardization for appearance, operation, maintenance, spare parts, and manufacturer's
service.
MATERIALS
A. Wiring
1.
Low voltage instrument and control wiring: UL/CSA approved stranded copper, minimum
size No. 14 AWG, with 600 Volt, 90 degree C, flame retardant, Type SIS. Current
transformer circuits shall utilize minimum size No. 10 AWG wire.
2.
Low level signal and communication circuit wiring: twisted shielded pair cables to
minimize electromagnetic interference. Shielded wire grounded at one point.
3.
Physical protection: Enclose control wiring in a grounded metal raceway when routed
through a high voltage compartment. Exposed wiring shall be neatly bundled and secured
with nylon wire ties and protected against contact with sharp metal edges by protective
grommets. Control wiring passing from cubicle to door shall be spiral wrapped to prevent
damage.
4.
Control circuit protective devices: dead-front pullout fuse blocks shall be used for circuit
protection and disconnect.
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B.
C.
June 2016
5.
Control wiring terminations: provide insulated locking spade terminals, except where
saddle type terminals are provided integral to a device. Current transformer secondary
leads shall first be connected to conveniently accessible shorting type terminal blocks
before connecting to any other device.
6.
Terminal blocks: Groups of control wires leaving the switchgear shall be provided with
terminal blocks with numbering strips. Provide a minimum of 10% spare terminals on each
terminal block.
7.
Wiring identification: provide molded plastic clip-sleeve or heat shrinkable type wire
markers at each termination point, marked with identification corresponding to appropriate
designations on manufacturer's wiring diagrams, color coding per ANSI standards and the
NEC.
8.
Component identification: fuse blocks, relays, pushbuttons, switches, etc., shall be marked
with identification corresponding to appropriate designations on manufacturer's wiring
diagrams.
9.
Power cable terminations: two hole NEMA bus pads with provisions for attaching clamp
compression/crimp type cable terminals suitable for copper cable of the number and sizes
shown on the Drawings. Provide adequate vertical clearance for electric stress cone cable
terminations.
Buses
1.
Main and riser bus: tin-plated copper. The main bus shall be fully insulated with sleeve
type insulation. Where joints are made, the joints shall be sealed with molded covers.
2.
Bus supports: high strength, high creep support providing 10.5-inch of creep distance
between phases and ground. Molded fins shall be constructed of high track resistant aramid
nylon, silicone rubber, or cycloaliphatic epoxy.
3.
Standoff insulators for 15kV fuse and switch mounting: glass polyester or cycloaliphatic
epoxy.
Grounding
1.
Ground bus: provide a plated copper ground bus extending throughout the entire length of
the switchgear, firmly secured to each vertical section structure and equipped with lugs for
external ground connections, sized for cables shown on the Drawings.
2.
Make provisions for connection of incoming and outgoing cable sheaths and for the copper
grounding conductors shown on the Drawings.
3.
Grounding lugs: provided in the incoming line section for connection of the main
conductor with additional lugs for supplemental grounding conductors as indicated on the
drawings.
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D. Potential Transformers
E.
1.
Potential transformers: Two-winding, encapsulated stationary type with primary and
secondary fuses. Voltage ratings and accuracy shall be as required for the application in
accordance with ANSI C57.13. Voltage transformers shall have 120 volt secondaries
unless otherwise specified and a burden capacity equal to twice the initial load.
2.
Voltage transformers shall be designed to withstand the basic impulse level of the
switchgear. Current limiting fuse protection shall be provided on the primary side of each
voltage transformer.
Surge Arresters
1.
2.03
Provide distribution class surge arresters in each incoming circuit section.
EQUIPMENT:
A. Each switch and fuse assembly or auxiliary unit shall be mounted in an individual, free
standing, self-supporting, metal enclosed cubicle constructed of sheet steel. All enclosing covers
and doors shall be fabricated from steel whose thickness shall be equal to or greater than those
specified in ANSI/IEEE C37.20.3.
B.
Where shown on the Drawings, cubicles shall be bolted together to form a group lineup of
multiple switch assemblies and auxiliary sections. Group lineups shall have full height sheet
steel barriers between adjacent cubicles. Provide adequate ventilation within the enclosure.
C.
All sections of the switchgear shall be front and rear aligned with depth as shown on drawings.
Make provisions for top or bottom cable entrance as shown on the Drawings. Structures shall be
front accessible only.
D. Each vertical section containing a switch shall have a single, full-length, flanged front door and
shall be equipped with two rotary latch-type padlockable handles. Provision shall be made for
operating the switch and storing the removable handle without opening the full length door.
Front doors shall be hinged and gasketed. The door shall be interlocked with the switch so that:
E.
1.
The switch must be opened before the door can be opened.
2.
The door must be closed before the switch can be closed.
The following features shall be supplied on every vertical section containing a three-pole, twoposition open-closed switch.
1.
A high-impact viewing window that permits full view of the position of all three switch
blades through the closed door.
2.
Provision for padlocking the switch in the open or closed position.
3.
Green OPEN, Red CLOSED switch position indicators.
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F.
2.04
June 2016
4.
A hinged grounded metal barrier that is bolted closed in front of every switch to prevent
inadvertent contact with any live part, yet allows for a full-view inspection of the switch
blade position.
5.
Full depth interphase and side barriers of insulating material in switch and fuse
compartments. Horizontal barriers between the switch and cable terminals or fuse supports
(when required) shall be provided.
6.
Tubular type space heaters operated at half voltage for long life shall be supplied. 500-volt
or 250-volt rated heaters shall be used at 240 or 120 volts, respectively.
Outdoor NEMA 3R Enclosure
1.
Switch enclosure: outdoor NEMA 3R enclosure conforming to all applicable requirements
of UL designed to withstand wind velocities of 110 mph.
2.
Undercoating: apply to all surfaces in contact with the foundation surface to retard
corrosion.
3.
The enclosure shall be provided with hinged padlockable doors with wind stops for each
section.
4.
Ventilating openings: provide complete with replaceable fiberglass air filters, removable
from the exterior of the enclosure.
5.
Space heaters: thermostatically controlled of adequate wattage to prevent the accumulation
of moisture within the compartments.
6.
Power for the space heaters shall be obtained from a control power transformer within the
switch. Supply voltage shall be 120/240 volts AC.
LOAD INTERRUPTER SWITCHES:
A. Load interrupter switches: 3 Pole, two position, gang operated, bottom hinged stationary load
break type, mounted on a rigid, welded steel frame. Main switch blades shall be high
conductivity, hard drawn copper. Mechanical linkages shall be porcelain or epoxy, with leakage
and flashover distances equal to the mounting insulators. Circuit interrupting arc shall be
completely contained and vented within the arc chutes.
B.
Manual switch operator: Quick make, quick break, non defeatable, high speed, stored energy
operating mechanism actuated by an external operating handle. Opening and closing shall be
accomplished by a single upward or downward stroke of the handle. The operating speed of the
interrupter switch shall be independent of the operator handle speed.
C.
Power fuses: fault protection shall be provided by fuses with continuous ratings as shown on the
Drawings.
1.
Current limiting fuses: self-contained, current limiting type designed to provide fault
interruption with minimum let through current and with no expulsion of gases or vapor.
Fuses shall be Eaton Cutler-Hammer Type CLE, NX, EJO-1 or equal.
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D. Provide a mechanical Kirk Key interlocks as required to interlock the transformer primary and
secondary protective devices:
2.05
1.
The primary switch must be open in order to open the secondary protective device.
2.
The primary switch must be closed before the secondary protective device is closed.
AUXILIARY CONTROL POWER
A. Control power: ac source shall be taken from a control power transformer internal to the switch
assembly.
B.
2.06
AC Control Power
1.
Control power transformer shall be sized for switch space heaters.
2.
Control power transformers: Two-winding dry type with primary fuses, secondary circuit
breaker, sized for the application per NFPA 70 (NEC).
3.
Control power transformers shall be fixed mounted.
4.
Secondary winding shall be 120/240VAC, single phase, 60Hz, 3 wire unless otherwise
specified.
SURFACE PREPARATIONS AND SHOP COATINGS
A. All exterior and interior steel surfaces of the switchgear shall be properly cleaned and provided
with a rust-inhibiting phosphatized coating.
B.
Equipment shall be finished with electrostatically applied, heat fused powder coating, 1.5 to 2
mil thickness. The paint finish shall be rated for 1000-hour salt spray, per ANSI C37.20.3.
Color and finish of the switchgear shall be ANSI 61 light gray.
C.
Outdoor equipment color shall be manufacturers standard gray.
D. Unpainted non-current carrying parts shall be galvanized to prevent corrosion.
2.07
SHOP TESTING
A. Perform manufacturers standard production testing and inspection in accordance with ANSI
/IEEE C37.20.3 and C37.20.4 standards., including:
1.
Check component bill of material for proper quantity, description, and part number.
2.
Check physical dimensions against approved drawings.
3.
Perform primary current injection tests to determine proper operation of all current
sensitive components.
4.
Perform primary voltage injection tests to determine proper operation of all voltage
sensitive components.
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June 2016
5.
Perform a low frequency withstand (AC high potential) test performed on the complete
assembly to assure insulation system integrity.
6.
Mechanical operation tests.
7.
Electrical operation and control wiring tests including correctness of wiring and insulation
tests, polarity, verification and sequence tests.
8.
Instruments, meters, protective devices and associated controls shall be functionally tested
by applying the specified control signals, current and/or voltages.
9.
Effectiveness of grounding of instrument transformer case or frame grounding
PART 3 EXECUTION
3.01
GENERAL
A. Install the switchgear as shown on the Drawings in accordance with the manufacturer's
instructions and approved shop Drawings.
3.02
FIELD CONNECTIONS
A. Provide a minimum of (2) 3/4", 10’0” copper clad driven ground rods as specified in Section
16000. Connect ground conductors to the upper end of the ground rods by exothermic weld or
compression connector. Provide compression connectors at equipment ground bus.
B.
Provide bare copper cable not smaller than No. 4/0 AWG not less than 24 -inches below grade
connecting to the grounding electrode system.
C.
Make wiring interconnections between shipping splits.
D. Install bus splice plates and torque the connections.
E.
Install medium voltage cables per Section 16121. Bond cable shields to the switchgear ground
bus per NEC requirements.
F.
Field low voltage wiring shall be grouped by circuit and tie wrapped. Terminations shall not be
stressed.
G. Insulate the primary cable connections to bus pads and lightning and surge arrestors. Fill voids
around bolted connections with 3M Brand SCOTCHFIL electrical putty and apply tape
insulation or heat shrink insulating boots in accordance with the switchgear manufacturer's
installation instructions.
3.03
INSTALLATION
A. Remove temporary lifting angles, lugs and shipping braces. Remove all current transformer
shunts after completing secondary circuits.
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B.
The equipment shall be leveled and anchored directly to a concrete equipment pad or finished
floor as shown on the Drawings. Provide hardware and metal shims for installation. Grout and
caulk all voids beneath the equipment base. Anchor bolts shall be sized and installed in
accordance with the Manufacturers recommendation to meet seismic requirements.
C.
The assembly shall be bolted directly to floor sills set level in concrete per manufacturer's
recommendations. Floor sills are not required if the floor is level to 1/8-inch per 3-foot distance
in any direction. Provide all necessary hardware to secure the assembly in place.
D. Locate conduit and cable entrances in the space designated by the equipment manufacturer.
Install conduits to prevent water from entering the enclosure. Bond all conduits including stubs
to the equipment ground bus. Seal voids around conduit openings in the slab with water- and
oil-resistant caulking or sealant. Cut off and bush conduits three inches above slab surface.
3.04
E.
Where field painting of enclosures is required to correct damage to the manufacturer's factory
applied coatings, provide manufacturer's recommended coatings and apply in accordance with
manufacturer's instructions.
F.
Repair damage to galvanized coatings using zinc rich paint.
FIELD TESTING
A. Perform physical, electrical, and mechanical inspections in accordance with the manufacturer's
recommendations and the following. Provide all temporary power for testing.
1.
Compare equipment nameplate data with specifications and approved shop drawings.
2.
Inspect physical, electrical, and mechanical condition.
3.
Verify appropriate anchorage, required area clearances, and correct alignment.
4.
Inspect all doors, panels, and sections for paint, dents, scratches, fit, and missing hardware.
5.
Verify that current transformer ratios and polarity correspond to approved shop drawings.
6.
Confirm correct operation and sequencing of electrical and mechanical interlock systems.
7.
Inspect insulating materials and structure for evidence of physical damage, reduced
clearances, or contaminated surfaces.
8.
Verify that field wiring is adequately separated from live busses. Physically secure the
field wiring to withstand the effects of fault currents.
9.
Check all devices for damage and make all necessary repairs or replacements, prior to
energizing.
10. Verify correct phase barrier installation.
11. Exercise all active components.
12. Inspect all mechanical indicating devices for correct operation.
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June 2016
13. Verify that vents are clear.
14. Inspect control power transformers.
15. Verify all ground connections have been made.
16. Verify operation of space heaters.
17. Verify that all maintenance devices such as special tools and gauges specified by the
manufacturer are available for servicing and operating the equipment.
18. Verify the unit is clean.
19. Verify correct blade alignment, blade penetration, travel stops, arc interrupter operation,
and mechanical operation.
20. Verify that fuse sizes and types are in accordance with drawings, short-circuit study, and
coordination study.
21. Verify that expulsion-limiting devices are in place on all holders having expulsion-type
elements.
22. Verify that each fuseholder has adequate mechanical support and contact integrity.
23. Perform all mechanical operation tests on the operating mechanism in accordance with
manufacturer's published data.
24. Inspect bolted electrical connections for high resistance using one of the following
methods
a. Use of low-resistance ohmmeter.
b. Verify tightness of accessible bolted electrical connections by calibrated torquewrench method in accordance with manufacturer's published data.
c. Perform thermographic survey.
25. Verify appropriate lubrication on moving current-carrying parts and on moving and sliding
surfaces.
26. Record as-found and as-left operation counter readings.
B.
Perform electrical acceptance tests on the switchgear in accordance with NETA ATS, including
1.
Conduct an electrical insulation resistance test to verify that the equipment and field wiring
are free from short circuits and grounds. Test phase-to-ground, phase-to-phase, and phaseto-neutral, with the switches opened.
2.
Insulation-resistance test on control wiring; do not perform this test on wiring connected to
solid-state components.
3.
Control wiring performance test.
4.
Phasing check on double-ended switchgear to ensure correct bus phasing from each source.
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C.
June 2016
5.
Conduct earth resistance ground testing.
6.
Insulation power factor and resistance test for surge arresters.
Perform the electrical acceptance tests on interrupter switches and fuses in accordance with
NETA ATS, including;
1.
Contact resistance tests across each switchblade and fuseholder.
2.
Perform insulation-resistance tests for one minute on each pole, phase-to-phase and phaseto ground with switch closed, and across each open pole.
3.
Perform a dielectric withstand voltage test on each pole with switch closed. Test each poleto ground with all other poles grounded.
4.
Measure fuse resistance.
5.
Test instrument transformers.
D. Perform the following before energizing the equipment
E.
3.05
1.
Retighten all accessible electrical connections to the manufacturer's torque values.
2.
Place all switches in the OPEN position before energizing the bus.
3.
Reinstall all parts and barriers removed to facilitate wiring and installation.
4.
Before closing the enclosure, remove all metal chips, scrap wire, and other debris from the
switchgear interior. Remove accumulated dust and dirt by using a brush, vacuum cleaner or
clean, lint-free rags.
5.
Install covers, close doors, and make certain that no wires are pinched and that all
enclosure parts are properly aligned and tightened.
Performance Test.
1.
Verify complete system operation including all hardware, software and communication
devices.
2.
Verify networking performance with all interfacing systems by other manufacturers.
ADJUSTMENT
A. Perform field adjustments and programming as required to place the equipment in final
operating condition. The settings shall be in accordance with the approved short circuit and
protective device coordination study.
B.
Provide the following services for starting up and programming of the power management
system and metering devices
1.
Set all the adjustable or programmable parameters of all devices in the equipment.
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2.
3.06
June 2016
Coordinate startup with other manufacturers’ equipment.
CLEANING
A. Remove all rubbish and debris around the switchgear. Remove dirt, dust, and concrete spatter
from the exterior of the equipment using brushes, vacuum cleaner, or clean, lint free rags.
END OF SECTION
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June 2016
SECTION 16425
LOW VOLTAGE SWITCHBOARDS
PART 1 GENERAL
1.01
SCOPE OF WORK
A. Furnish all labor and materials required to provide and install complete, the low voltage
switchboard equipment as shown on the Drawings and as specified herein.
1.02
RELATED WORK
A. Power system studies are included in Supplemental Specification 16015.
B.
Substation transformers and primary switches are included in other Supplemental Specifications
within Division 16.
C.
Concrete for equipment pad is included in P-610.
D. Concrete for equipment pads shall be furnished under this Section and comply with P-610.
E.
1.03
Excavation is included in P-152.
SUBMITTALS
A. Submit shop drawings and product data in accordance with GP-50-03.
B.
Shop drawings shall include the following information:
1.
Master drawing index
2.
Front elevation view
3.
Floor plan layout
4.
Top view
5.
Dimensions, weight, and shipping splits
6.
Single line diagrams
7.
Schematic diagrams
8.
Nameplate schedules
9.
Component list including metering, protective relays, accessories and control equipment
10. Conduit entry/exit locations
11. Assembly ratings including:
a. Short-circuit rating
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b.
c.
d.
June 2016
Voltage
Continuous current
Bus material and ratings
12. Major component ratings including:
a. Voltage
b. Continuous current
c. Interrupting ratings
13. Cable terminal lug sizes
14. Product data sheets and catalog numbers for circuit breakers and fused switches. List all
options, trip adjustments and accessories furnished specifically for this project.
C.
Submit the following additional information where applicable
1.
Busway connection
2.
Connection details between close-coupled assemblies
3.
Composite floor plan of close-coupled assemblies
4.
Key interlock scheme drawing and sequence of operations
D. Design Data
E.
1.
Submit the preliminary short circuit and selective coordination study prior to submittal of
equipment shop drawings. The equipment shop drawings will not be reviewed until the
preliminary power system study is approved by the Engineer.
2.
Provide manufacturer's published time-current curves of the main breaker and feeder
devices per Section 16000.
3.
Provide seismic anchoring details, coordinated with the equipment mounting provision,
prepared and stamped by a licensed professional engineer. Mounting recommendations
shall be based upon manufacturers shake table tests used to verify the seismic design of the
equipment.
Test reports
1.
When requested, submit design test reports. Furnish documentation showing the results of
design tests on a product of the same series and rating as that provided by this
specification.
2.
Submit production test reports showing results of testing performed on the actual
equipment for this project. These tests include:
a. 60-hertz dielectric tests
b. Mechanical operation tests
c. Electrical operation and control wiring tests
d. Ground fault sensing equipment test.
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3.
F.
June 2016
Submit field test reports showing results of testing performed on the actual equipment for
this project.
Submit manufacturer's installation instructions for the complete assembly and each major
component:
1.
Shipping, storage, and handling instructions
2.
Installation bulletins
3.
Supplemental instruction bulletins.
4.
Application software
5.
Instructions necessary for proper seismic mounting of the equipment.
G. Statement of Qualifications
1.
When requested, submit qualifications of factory service representatives for approval.
2.
When requested, submit an acceptable list of installations with similar equipment to
demonstrate compliance with this specification.
H. Manufacturer's Field Report
1.
I.
J.
When requested, submit manufacturers field inspection reports.
Project Record Documents
1.
Submit record document information in accordance with Section GP 50-03.
2.
Submit the following information for record purposes:
a. A complete set of manufacturers "As Built" shop drawings incorporating all changes
made during the manufacturing process.
b. "As Built" point-to-point compartment wiring diagrams for metering, relay and
control circuits. Show wire and terminal numbers.
c. Field wiring interconnection drawings illustrating all field components and electric
connections to the systems supplied under this Section.
d. Confirm and record all protective device settings.
3.
Furnish electronic copies of switchboard drawings, single line diagrams, and wiring
diagrams in AutoCAD native file format. Drawings shall include any field modifications or
changes to reflect actual as built conditions after completion of start-up and final
acceptance by the Owner.
Operation and Maintenance Data
1.
Submit operation and maintenance manuals in accordance with Section GP 50-03.
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1.04
June 2016
2.
Provide equipment operation and maintenance manuals with each shipped assembly
including instruction leaflets, instruction bulletins and renewal parts lists for the complete
assembly and each major component.
3.
Manuals shall include the following as a minimum:
a. A comprehensive index.
b. A list of the equipment supplied, including serial numbers, ranges and pertinent data.
c. Full product specifications for each item.
d. Service, maintenance and operation instructions for each item.
e. Special maintenance requirements particular to this system shall be clearly defined,
along with set up and test procedures.
f. Renewal parts list with stock numbers.
REFERENCE STANDARDS
A. American National Standards Institute (ANSI)
1.
B.
C.
ANSI C37.50 - Test Procedures for Low-Voltage AC Power Circuit Breakers Used In
Enclosures.
National Electrical Manufacturers Association (NEMA)
1.
NEMA PB 2 - Deadfront Distribution Switchboards.
2.
NEMA PB 2.1 - General Instructions for Proper Handling, Installation, Operation and
Maintenance of Deadfront Distribution Switchboards Rated 600 Volts or Less.
Institute of Electrical and Electronics Engineers (IEEE)
1.
ANSI/IEEE C37.13 - Low-Voltage AC Power Circuit Breakers Used in Enclosures.
2.
ANSI/IEEE C37.90.1 - Surge Withstand Capability (SWC) Tests for Relays and Relay
Systems Associated with Electric Power Apparatus
D. Underwriters' Laboratories (UL).
E.
1.
UL 891 - Dead-Front Switchboards.
2.
UL 489 - Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker
Enclosures.
3.
UL 1066 - Low-Voltage AC and DC Power Circuit Breakers Used in Enclosures.
National Fire Protection Association (NFPA)
1.
F.
NFPA 70 - National Electrical Code.
International Electrical Testing Association (NETA)
1.
NETA ATS- Acceptance Testing Specifications.
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G. Where reference is made to one of the above standards, the revision in effect at the time of the
bid shall apply.
1.05
QUALITY ASSURANCE
A. Qualifications
B.
C.
1.06
1.
The equipment furnished under this Section shall be the product of a manufacturer who has
produced this same type of equipment for a period of at least 10 consecutive years.
2.
The switchboard equipment shall be designed, assembled and tested by the manufacturer of
the major components and circuit protective devices used within the switchboard assembly.
Regulatory Requirements
1.
Equipment, materials, installation, and workmanship shall be in accordance with the
mandatory and advisory provisions of NFPA 70 (NEC) unless more stringent requirements
are specified or indicated.
2.
The equipment and major components shall be suitable for and certified to meet all
applicable seismic requirements of the International Building Code (IBC) for Zone 4
application. Guidelines for the installation consistent with these requirements shall be
provided by the manufacturer and be based upon testing of representative equipment. The
test response spectrum shall be based upon a 5% minimum damping factor, IBC: a peak of
2.45g's (3.2-11 Hz), and a ZPA of 0.98g's applied at the base of the equipment. The tests
shall fully envelop this response spectrum for all equipment natural frequencies up to at
least 35 Hz.
Certifications
1.
The manufacturer shall maintain a documented ISO 9001 or 9002 quality assurance
program implementing suitable procedures and controls to monitor all aspects of
production and testing.
2.
All sections and devices shall be UL listed and labeled. Service equipment shall be UL
labeled as suitable for use as service entrance equipment.
3.
The equipment manufacturer shall certify that the equipment will function following a
seismic event, including both vertical and lateral required response spectra referenced in
the specified codes.
SYSTEM DESCRIPTION
A. General
1.
It is the intent of these Contract Documents that the Contractor furnish and install, where
indicated, free-standing, dead-front type low voltage distribution switchboard equipment,
utilizing compartmentalized feeder circuit protective devices as specified herein, and as
shown on the contract Drawings.
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B.
2.
Provide a transition compartments as needed to form a close coupled unit substation with
the substation transformer equipment shown on the contract drawings. Insulating barriers
shall isolate the switchboard bus from the transformer enclosure.
3.
Switchboards shall be installed in a NEMA-1 or NEMA-32 enclosure in accordance with
the location where installed on the Drawings.
System Responsibility
1.
C.
June 2016
Equipment specified under this Section shall be furnished as an integrated assembly by the
manufacturer who shall have sole responsibility for furnishing all the parts and components
required for a complete and operable system; however, all equipment need not be
manufactured by a single manufacturer.
Design Requirements
1.
The switchboard shall be arranged so that the uppermost operating handle shall not exceed
6-ft 6-in from the floor when the switchboard is mounted on a 4-in high equipment pad.
2.
Equip useable blank spaces and spaces indicated on the Drawings for future devices with
all hardware necessary for the future addition of a protective device including doors, bus,
device supports, mounting plates, and connections.
3.
Provide key interlocks on main breakers as required to interlock the primary and secondary
disconnects on the unitized power centers or unit substations.
D. Performance Requirements
1.
Minimum short circuit interrupting rating:
a. The assembly shall be rated to withstand mechanical forces exerted during shortcircuit conditions when connected directly to a power source having available fault
current in accordance with the final power system study provided in Section 16000.
2.
Voltage and current ratings: as indicated on the Drawings.
3.
Surge Withstand Capability: per ANSI/IEEE C62.41 without damage.
4.
The equipment and components shall operate continuously at its rated current under the
following environmental conditions without damage or degradation of operating
characteristics or life:
a. Operating Ambient Temperature: 0 degrees C to 40 degrees C maximum ambient
temperature.
b. Storage Temperature: -40 degrees C to 65 degrees C.
c. Relative Humidity: 0 to 95%, non-condensing.
d. Altitude: Operating to 6500 ft, de-rate for higher elevations.
e. Vibration: Per location and code requirements.
5.
Metering accuracy: minimum accuracy of the complete system, including current sensors,
auxiliary CTs, and the meter display, shall be +/- 1% of full scale for current values, and
+/- 2% of full scale for power and energy values.
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E.
F.
June 2016
Power System Coordination and Protection
1.
Provide a coordinated power system as specified in Section 16015.
2.
The switchboard and protective devices shall be fully rated for the specified short circuit
current. Systems employing series connected ratings shall not be used.
3.
Power circuit breaker: provide the following minimum independent time-current curve
shaping adjustments for each power circuit breaker:
a. Adjustable long time pick-up and delay.
b. Adjustable short time pick-up, delay, and I2t settings.
c. Adjustable ground fault pick-up, delay, and I2t settings.
d. Adjustable instantaneous pickup.
4.
Molded case circuit breaker: provide the following minimum independent time-current
curve shaping adjustments for each molded case breaker with an electronic trip unit:
a. Adjustable long-time setting (set by adjusting the trip setting dial or rating plug)
b. Adjustable short-time setting and delay with selective curve shaping
c. Adjustable instantaneous setting
d. Adjustable ground fault setting and delay
5.
Protective features: provide the following adjustable protective features at each main
breaker location. This protection may be integral to the manufacturer's standard trip unit
offering, or may be provided via separate protective relays, however it shall be furnished as
a complete and functional package:
a. Voltage phase loss.
b. Current phase loss.
c. Line voltage phase unbalance, selectable from 5 to 40 percent of nominal in 5 percent
increments.
d. Voltage phase reversal.
e. Overvoltage, selectable from 105 to 140 percent in 5 percent increments.
f. Undervoltage, selectable from 95 to 60 percent in 5 percent increments.
g. Time delay (adjustable from 0 to 8 seconds in 1 second intervals) for overvoltage,
undervoltage, and phase unbalance trip and alarm settings.
Metering Requirements
1.
Basic metering: display the following minimum metered values at each breaker location.
This metering may be integral to the manufacturer's standard trip unit offering, or may be
provided via separate metering devices, however it shall be furnished as a complete and
functional package:
a. Instantaneous value of phase current
b. Instantaneous value of line-to-line voltage
2.
Enhanced metering: meter and display the following values at each incoming main circuit
breaker location:
a. AC Phase Amperes +/- 0.5%
b. AC Phase Voltage +/- 0.5%
c. Watts +/- 1.0%
d. VA +/- 1.0%
e. Vars +/- 1.0%
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f.
g.
h.
i.
j.
k.
l.
m.
n.
o.
p.
q.
3.
1.07
June 2016
Power Factor +/- 2.0%
Frequency +/- 0.1 Hz
Watthours +/- 1.0%
Varhours +/- 1.0%
VA hours +/- 1.0%
Watt Demand (10-, 15-, 20-, 25-, 30-, 45-, 60-minute interval)
Voltage (minimum/maximum)
Current (minimum/maximum)
Power (minimum/maximum)
Power Factor (minimum/maximum)
Frequency (minimum/maximum)
Peak Demand
Power quality monitoring: display the following values at each incoming main circuit
breaker location:
a. %THD (through 31st harmonic)
b. Peak % THD
DELIVERY, STORAGE AND HANDLING
A. Packing and Shipping
1.
B.
Acceptance at Site
1.
C.
The assembly shall be provided with adequate lifting means for moving into the
installation position.
Storage and Protection
1.
1.08
Equipment shall be handled and stored in accordance with manufacturer's instructions and
NEMA PB 2.1.
Refer to Section 16000.
PROJECT/SITE REQUIREMENTS
A. Environmental Requirements
1.
1.09
Provide dry storage for all electrical equipment in accordance with the Owner’s direct.
MAINTENANCE
A. Provide the following materials in the quantity specified. Materials shall match those installed
in all respects and where possible shall come from the same production lot. Materials shall be
properly packaged for long storage and containers shall be clearly and indelibly labeled on the
exterior.
1.
One quart of touch-up paint.
2.
One dozen each of cover bolts, spring nuts and door fasteners.
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B.
1.10
June 2016
Spare Parts
1.
Provide the following spare parts in the quantities specified
a. (12) Fuses of each type and size.
b. (1) Spare static trip device.
c. (24) Pilot lamps of each type.
2.
Spare parts shall be boxed or packaged for long term storage and clearly identified on the
exterior of package. Identify each item with manufacturers name, description and part
number.
WARRANTY
A. Provide a warranty for parts and labor for a period of one year after final acceptance.
1.11
NOMENCLATURE AND IDENTIFICATION
A. Provide engraved laminated plastic nameplates on all doors for unit load description and for
each control or indicating device. Nomenclature shall be as shown on the Drawing or as
directed, using lettering approximately 3/8-in high for unit identification nameplates and 1/4-in
high elsewhere. The nameplates shall use white letters on a black background. The engraving
shall extend through the exterior lamination to the core. Nameplates shall be screw fastened.
B.
The manufacturer shall fasten a master NEMA nameplate to the front of the switchboard
indicating model number, serial number, order number, manufacturing date, bus amperes, volts,
overall short circuit rating, etc.
C.
Provide permanent electrical hazard warning signs marked per OSHA requirements.
D. Provide permanent arc flash PPE labels per Section 16015.
1.12
MANUFACTURERS' SERVICES
A. Provide services of a manufacturer's service representative for testing and start-up, as required
in Section 16000.
B.
Provide services of a manufacturer's service representative for training, as required in Section
16000.
C.
Furnish the services of a manufacturer's representative for a minimum period of four, 8-hour
days for setup and programming of the metering devices. The manufacturer's representative
shall be factory-trained and shall have a thorough knowledge of the software, hardware, and
system programming.
PART 2 PRODUCTS
2.01
GENERAL
A. The use of a manufacturer's name and model or catalog number is for the purpose of
establishing the standard of quality and general configuration desired.
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B.
C.
2.02
June 2016
Products of the following manufacturers are acceptable.
1.
Eaton / Cutler-Hammer
2.
General Electric
3.
Siemens
4.
Square D
5.
Or approved equal.
Like items of materials/equipment shall be the end products of one manufacturer in order to
provide standardization for appearance, operation, maintenance, spare parts, and manufacturer's
service.
MATERIALS
A. Wiring
B.
1.
Low voltage instrument and control wiring: Stranded copper, minimum size No. 14 AWG,
with 600 Volt, 90 degree C, flame retardant, Type SIS, bundled and secured with nylon
ties. Provide wire markers at each end of all control wiring.
2.
Control wiring terminations: provide insulated locking spade terminals, except where
saddle type terminals are provided integral to a device. Current transformer secondary
leads shall first be connected to conveniently accessible shorting type terminal blocks
before connecting to any other device.
3.
Terminal blocks: Groups of control wires leaving the motor control center shall be
provided with terminal blocks with numbering strips.
4.
Wiring identification: provide heat shrinkable wire markers at each termination point,
marked with identification corresponding to appropriate designations on manufacturer's
wiring diagrams, color coding per NEMA standards and the NEC.
5.
Component identification: fuse blocks, relays, pushbuttons, switches, etc., shall be marked
with identification corresponding to appropriate designations on manufacturer's wiring
diagrams.
6.
Line and load terminations: mechanical type terminals, suitable for 75 or 90 degrees C,
copper or aluminum cable of the size indicated on the Drawings.
7.
Grounding lugs: provided in the incoming line section for connection of the main
conductor with additional lugs for supplemental grounding conductors as indicated on the
Drawings.
Buses
1.
Buses: non-tapered, tin-plated copper. Provide a fully rated neutral bus where a neutral bus
is indicated on the Drawings.
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C.
2.03
June 2016
2.
Bus bracing: exceed the specified equipment short circuit current rating, but not less than
65,000 amperes RMS symmetrical.
3.
Bus joints: welded connections or accessible bolted joints with high-tensile strength, zincplated hardware and conical spring-type washers.
4.
Ground bus: provide a copper ground bus extending throughout the entire length of the
switchboard, firmly secured to each vertical section structure and equipped with lugs for
external ground connections, sized for cables shown on the Drawings.
Control and Metering Transformers
1.
Potential transformers: Two-winding, encapsulated type with primary and secondary fuses.
Voltage ratings shall be as required for the application. Thermal rating and metering
accuracy per ANSI Standard C57.13.
2.
Current transformers: 600 volt rated, toroidal type with accuracy class per ANSI Standard
C57.13 requirements for the specified metering application.
3.
Control power transformers: Two-winding dry type with primary fuses, secondary circuit
breaker, sized for the application per NFPA 70 (NEC).
EQUIPMENT
A. Switchboard shall consist of the required number of vertical sections bolted together to form a
rigid assembly. The sides and rear shall be covered with removable bolt-on covers. All edges of
front covers or hinged front panels shall be formed. Provide adequate ventilation within the
enclosure.
B.
1.
All sections of the switchboard shall be rear aligned.
2.
Devices shall be front removable and load connections front accessible enabling
switchboard to be mounted against a wall.
3.
Side access shall not be required.
4.
All connections and bus maintenance shall be from the front or the top.
Enclosure
1.
NEMA 1 enclosure consisting of side, top and rear covers bolted to steel frame structure
members. Front doors shall be hinged and gasketed with captive quarter turn fasteners.
2.
Outdoor NEMA 3R Enclosure
a. Outdoor enclosure shall be non-walk-in and meet applicable NEMA 3R UL
requirements.
b. Enclosure shall have a roof sloping downward toward the rear.
c. Outer sections shall be the same widths as indoor structures, except each end of the
outdoor assembly shall have an end trim.
d. The enclosure shall be provided with rear hinged doors for each section.
e. Doors shall have provisions for padlocking.
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f.
g.
h.
C.
June 2016
Ventilating openings shall be provided complete with replaceable fiber glass air
filters.
Provide thermostatically controlled space heaters for each structure with adequate
wattage to prevent the accumulation of condensed moisture.
Power for space heaters, lights and receptacles shall be obtained from a control power
transformer within the switchboard. Supply voltage shall be 120/240 volts AC.
Customer Metering
1.
Where indicated on the drawings, provide a separate customer metering compartment with
a front facing hinged door and include the following:
a. Current transformers for each meter. Current transformers shall be wired to shortingtype terminal blocks.
b. Potential transformers including primary and secondary fuses with disconnecting
means.
D. Main Section
E.
1.
Main section: consists of an incoming cable compartment with main lugs or a main
disconnecting device as shown on the Drawings.
2.
Main lug terminations: provide adequate space for the type and size and quantity of cable
as indicated on the Drawings. Lugs shall be standard mechanical screw with anti-turn
feature.
3.
Main breaker: individually mounted and draw out.
Distribution Sections
1.
F.
The distribution sections shall consist of compartmentalized molded or insulated case
circuit breakers as indicated. Feeder sections shall be isolated from main section, and from
adjacent feeder sections. Feeder devices shall be mounted in individual compartments with
an external operating handle located on the compartment door.
Draw Out Cells: where draw-out applications are specified or indicated on the Drawings, equip
the breaker cell with draw out rails and primary and secondary disconnecting contacts, and
safety interlocks.
1.
Power disconnecting means: moving finger contacts on the power circuit breaker studs to
engage stationary contacts extending through a glass polyester insulating support barrier
only in the connected position. Provide multiple silver-to-silver full floating high-pressure
point contacts with uniform pressure on each finger maintained by springs.
2.
Secondary control power disconnecting means: gold-plated and pin and socket type plug-in
connectors mounted on the removable unit and engaging floating plug-in connectors at the
front of the compartment. Maintain contact engagement in the CONNECTED and TEST
positions.
3.
Racking mechanism: provide a mechanism with a removable lever crank to place the
breaker into the CONNECTED, TEST, DISCONNECTED or REMOVED position, all of
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June 2016
which permit closing the compartment door. Padlocking shall secure the breaker in the
CONNECTED, TEST or DISCONNECTED position by preventing levering
2.04
4.
Position indicator: color-coded visual indication of the CONNECTED, TEST, and
DISCONNECTED breaker cell position.
5.
Interlocks: provide interlocks to prevent the following operations
a. Racking a closed breaker into or out of the CONNECTED position.
b. Closing a circuit breaker until it is fully racked into the TEST or CONNECTED
position.
c. Withdrawing a circuit breaker from the cubicle while the closing springs are charged.
d. Insertion of a circuit breaker of incorrect frame size or inadequate interrupting
capacity.
e. Where indicated, provide key locking open to prevent manual or electric closing.
6.
Removable element auxiliary switch contacts: provide 4 normally open and 4 normally
closed, break-before-make auxiliary contacts wired to terminal blocks to indicate breaker
position in the cell.
POWER CIRCUIT BREAKERS
A. Power circuit breakers: constructed and tested in accordance with ANSI C37.13, C37.16,
C37.17, and C37.50 standards, and listed per UL 1066 for application in their intended
enclosures for 100% of their continuous ampere rating.
B.
1.
Type: switchboard class, insulated case, low voltage power circuit breakers.
2.
Mounting: draw-out style with integral handles on the side of the breaker to facilitate
lifting
3.
Closing time: maximum 3 cycles.
4.
Primary contacts: easily accessible wear indicator to indicate contact erosion.
5.
Operator: *manually or electrically operated as indicated on the Drawings.
6.
Breaker control interface: color-coded visual indicators to indicate contact open or closed
positions as well as mechanism charged and discharged positions. Provide manual control
pushbuttons on the breaker face for opening and closing the breaker. Breaker flag shall
read "Closed" if the contacts are welded and the breaker is attempted to be tripped or
opened.
7.
Current limiting fuses: integrally mounted, isolated until the breaker is withdrawn, and
coordinated such that the breaker trip device operates before the current limiters. Provide
an anti-single-phase device that will trip the breaker in the event of a blown limiter,
indicate from the front of the breaker which limiter is blown, and prevent the breaker from
being re-closed on a single-phase condition due to missing or blown limiters.
Minimum symmetrical interrupting capacity: not less than overall switchboard interrupting
rating, in accordance with the final power system study included in Section 16015.
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C.
June 2016
Trip units: fully adjustable, electronic overcurrent trip device with true three phase RMS
sensing of sinusoidal and non-sinusoidal currents, and the following minimum features and
functions:
1.
Interchangeable current sensors with their associated rating plug shall establish the
continuous trip rating of each circuit breaker.
2.
Trip mode indicators for ground fault, overload and short circuit.
3.
An operator interface display panel showing diagnostic information and metering
information.
4.
Main Breakers to be equipped with ARM or allow a preset maintenance mode with an
accelerated instantaneous override trip to reduce arc flash energy.
5.
All trip units shall be Ethernet capable and shall communicate with the metering. All
monitored parameters shall be capable of being transmitted.
D. Electrically operated breakers: provide close/open pushbuttons, plus red and green indicating
lights to indicate breaker contact position 120 Vac, motor operators; with single operation
capacitor back-up, motor charging time shall not exceed 6 seconds.
2.05
1.
Control power: AC sources shall be supplied from control power transformers internal to
the switchboard assembly.
2.
Indicator lights: Provide green, red and amber LED pilot lights for each circuit breaker
OPEN, CLOSED and TRIP indication.
MOLDED CASE CIRCUIT BREAKERS
A. Molded case circuit breakers: provide inverse time and instantaneous tripping characteristics,
listed per UL 489 for applications at 100% of their continuous ampere rating in their intended
enclosure.
B.
Trip mechanism: quick-make, quick-break, mechanically trip-free over-center switching
mechanism operated by a toggle-type handle. Handle shall indicate breaker position. A push-totrip button on the front of the circuit breaker shall provide a local manual means to exercise the
trip mechanism.
C.
Contacts: non-welding silver alloy with arc extinction accomplished via arc chutes.
D. Minimum symmetrical interrupting capacity: not less than overall switchboard interrupting
rating. Provide current limiting circuit breakers where indicated or required to meet the
specified short circuit rating.
E.
Trip units shall be fully adjustable, microprocessor-based, electronic overcurrent trip device
with true three phase RMS sensing of sinusoidal and non-sinusoidal currents, and the following
minimum features and functions:
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2.06
June 2016
1.
Rating plugs shall be adjustable and interlocked so they are not interchangeable between
frames, and interlocked such that a breaker cannot be closed and latched with the rating
plug removed.
2.
Trip mode indicators for ground fault, overload and short circuit.
3.
An operator interface display panel showing diagnostic information and metering
information.
METERING AND CONTROL
A. Digital Metering and Protection Device
1.
Type: UL listed, CUL, CSA and CE certified microprocessor based, solid state, door
mounted digital line meter and protective device with accuracy per ANSI C12.16.
2.
Surge withstand rating: meet ANSI standard C37.90.1 for surge withstand.
3.
Inputs: Provide external current transformers with rating as indicated on the drawings.
Fused internal self-contained potential transformers for voltages up to 600 volts. Control
power shall be supplied internally from the switchboard.
4.
Operator interface: faceplate shall be membrane type, rated NEMA 12, with a durable
backlit display to allow simultaneous viewing of multiple parameters. The meter shall be
completely programmable using the display keypad or via network communications to
allow the user to disable undesired values/functions and to later reactivate them if required.
The display screen shall indicate trip and alarm conditions.
5.
Non-volatile memory: All set points and recorded minimum and maximums shall be stored
in non-volatile memory and not require battery backup. In the event of a power failure, the
meter shall retain all preset parameters, accumulated watthours and watt demand. Data at
time of power loss and cause of trip shall be stored.
6.
Synchronous pulse input: when activated shall override the preset watt demand interval
and let the utility control the demand window.
7.
Trip and alarm outputs: provide separate programmable contacts that actuate when a
protective function exceeds its setpoint. The contacts shall have ratings of 10 Amps at
115/240 VAC and shall be NO/NC.
8.
kWh pulse output: provide a separate field programmable NO/NC contact for a kilowatt
hour pulse.
9.
Operating temperature range: 0 to 70 degrees C, and 0 to 95 percent relative humidity noncondensing.
10. Reset function: a built in reset button shall allow manual reset of a trip or alarm condition.
Watt-hours and watt demand shall be resettable.
B.
Electronic Trip Unit Monitor
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1.
2.07
June 2016
Provide a microprocessor-based device designed to monitor and display parameters of the
circuit breaker electronic trip units. The monitor shall have the following features:
a. Alphanumeric display.
b. Indication of circuit breaker status; tripped, open, closed.
c. Cause of circuit breaker trip.
d. Phase, neutral, and ground current for each breaker.
e. Energy parameters for each breaker.
NETWORK COMMUNICATIONS
A. Provide interface hardware, cabling, and software to enable the following microprocessor-based
devices to communicate with the plant-wide ETHERNET/IP network:
1.
Metering devices
2.
Circuit breaker trip units
B.
Communicate metering and trip device data to a plant-wide power management network.
C.
Communications gateway: Provide a distributed data logging gateway, interface hardware,
power supplies, cabling, and software to connect local microprocessor-based devices to a fiber
optic communications network.
2.08
SURFACE PREPARATIONS AND SHOP COATINGS
A. All exterior and interior steel surfaces of the switchboard shall be properly cleaned and provided
with a rust-inhibiting phosphatized coating. Color and finish of the switchboard shall be
manufacturer's standard light gray.
B.
Outdoor equipment shall be painted with two finish coats of polyurethane or epoxy enamel, 1 to
2 mil thickness. Exterior color shall be dark green.
C.
Unpainted non-current carrying parts shall be galvanized to prevent corrosion.
2.09
SHOP TESTING
A. Perform manufacturers standard production testing and inspection in accordance with NEMA
and UL standards. If requested by the Engineer, the manufacturer shall submit certified copies
of test results to indicate proof of compliance with NEMA and UL Standards.
PART 3 EXECUTION
3.01
GENERAL
A. Install the switchboard as shown on the Drawings and in accordance with manufacturer's
instructions and approved shop drawings.
B.
Install the equipment in accordance with NEMA PB 2.1.
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3.02
June 2016
FIELD CONNECTIONS
A. Provide a minimum of (2) points of ground connection using bare copper cable not smaller than
No. 4/0 AWG not less than 24 -inches below grade connecting to the existing grounding
electrode system.
B.
Make wiring interconnections between shipping splits.
C.
Install bus splice plates and torque the connections.
D. Install field wiring per Section 16000. Field wiring shall be grouped by circuit and tie wrapped.
Terminations shall not be stressed.
3.03
INSTALLATION
A. Remove temporary lifting angles, lugs and shipping braces. Remove all current transformer
shunts after completing secondary circuits.
B.
Mount indoor switchboards on a four-inch-thick concrete slab, unless otherwise indicated.
Edges shall have 1/2-inch chamfer. The slab shall extend at least four inches beyond the
equipment.
C.
Unless otherwise indicated, the thickness of the concrete slab shall be increased to eight inches
thick for outdoor applications, reinforced with 6-in by 6-in No. 6 mesh placed uniformly 4-in
from the top of the slab. Slab shall be placed on a 6-in thick, well-compacted gravel base.
D. The assembly shall be bolted directly to floor sills set level in concrete per manufacturer's
recommendations. Floor sills are not required if the floor is level to 1/8-inch per 3-foot distance
in any direction. Provide all necessary hardware to secure the assembly in place.
E.
Locate conduit and cable entrances in the space designated by the equipment manufacturer.
Install conduits to prevent water from entering the enclosure. Bond all conduits including stubs
to the equipment ground bus. Seal voids around conduit openings in the slab with water- and
oil-resistant caulking or sealant. Cut off and bush conduits three inches above slab surface.
F.
Where field painting of enclosures is required to correct damage to the manufacturer's factory
applied coatings, provide manufacturer's recommended coatings and apply in accordance with
manufacturer's instructions.
G. Repair damage to galvanized coatings using zinc rich paint.
3.04
FIELD TESTING
A. Perform physical, electrical, and mechanical inspections in accordance with the manufacturer's
recommendations and the following. Provide all temporary power for testing.
1.
Compare equipment nameplate data with specifications and approved shop drawings.
2.
Inspect physical, electrical, and mechanical condition.
3.
Confirm correct application of manufacturer's recommended lubricants.
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June 2016
4.
Verify appropriate anchorage, required area clearances, and correct alignment.
5.
Inspect all doors, panels, and sections for paint, dents, scratches, fit, and missing hardware.
6.
Verify that fuse and circuit breaker sizes and types correspond to approved shop drawings.
7.
Verify that current transformer ratios correspond to approved shop drawings.
8.
Confirm correct operation and sequencing of electrical and mechanical interlock systems.
9.
Inspect insulating materials and structure for evidence of physical damage, reduced
clearances, or contaminated surfaces.
10. Verify that field wiring is adequately separated from live busses. Physically secure the
field wiring to withstand the effects of fault currents.
11. Check all devices for damage and make all necessary repairs or replacements, prior to
energizing.
12. Verify correct barrier and shutter installation and operation.
13. Exercise all active components.
14. Inspect all mechanical indicating devices for correct operation.
15. Verify that vents are clear.
16. Test operation, alignment, and penetration of disconnecting contacts.
17. Inspect control power transformers.
18. Verify all ground connections have been made.
19. Verify operation of space heaters.
B.
Perform the following electrical acceptance tests on the switchboard in accordance with NETA
ATS.
1.
Conduct an electrical insulation resistance test to verify that the equipment and field wiring
are free from short circuits and grounds. Test phase-to-ground, phase-to-phase, and phaseto-neutral, with the switches or circuit breakers opened.
2.
Over-potential tests.
3.
Insulation-resistance test on control wiring; do not perform this test on wiring connected to
solid-state components.
4.
Control wiring performance test.
5.
Primary current injection tests on the entire current circuit in each section of assembly.
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C.
June 2016
6.
Phasing check on double-ended switchboard to ensure correct bus phasing from each
source.
7.
Conduct earth resistance ground testing.
Perform the following electrical acceptance tests on insulated case and molded case circuit
breakers with solid state trips in accordance with NETA ATS.
1.
Contact resistance tests.
2.
Insulation resistance tests.
3.
Bench test all trip unit characteristics.
4.
Verify correct operation of any auxiliary features such as ARM or maintenance trip and
pickup indicators.
D. Perform the following before energizing the equipment in accordance with NEMA PB 2.1:
E.
1.
Retighten all accessible electrical connections to the manufacturer's torque values.
2.
Retighten the wire clamping members of all accessible mechanical pressure wire type
connectors to the values specified by the manufacturer.
3.
Retighten conical spring washers according to manufacturer's instructions.
4.
Turn all circuit breakers and fusible switches to the OFF position before energizing the
bus.
5.
Adjust ground fault and instantaneous protective devices to their most sensitive settings
during start-up. Reset the devices after startup is complete and the equipment has been
successfully energized.
6.
Reinstall all parts and barriers removed to facilitate wiring and installation.
7.
Before closing the enclosure, remove all metal chips, scrap wire, and other debris from the
motor control center interior. Remove accumulated dust and dirt by using a brush, vacuum
cleaner or clean, lint-free rags.
8.
Install covers, close doors, and make certain that no wires are pinched and that all
enclosure parts are properly aligned and tightened.
Performance Test
1.
Verify complete system operation including all hardware, software and communication
devices.
2.
Verify networking performance with all interfacing systems by other manufacturers.
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3.05
June 2016
ADJUSTMENT
A. The Contractor shall perform field adjustments of the protective devices as required to place the
equipment in final operating condition. The settings shall be in accordance with the approved
short circuit and protective devices coordination study.
B.
3.06
The manufacturer's representative shall provide the following services for starting up and
programming of the power management system and metering devices:
1.
Set all the adjustable or programmable parameters of all devices in the equipment.
2.
Coordinate startup with other manufacturer's equipment.
3.
Verify the integrity of the data communications network and troubleshoot as necessary.
4.
Set all the network addresses of all devices in the equipment.
CLEANING
A. Remove all rubbish and debris from inside and around the switchgear. Remove dirt, dust, and
concrete spatter from the interior and exterior of the equipment using brushes, vacuum cleaner,
or clean, lint free rags.
B.
Vacuum clean the interior of the equipment. Do not use compressed air.
END OF SECTION
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June 2016
SECTION 16430
DRY TYPE PAD MOUNTED TRANSFORMER
PART 1 GENERAL
1.01
SCOPE OF WORK
A. Furnish and install the dry type pad mounted transformer as shown on the Drawings and as
specified herein.
1.02
RELATED WORK
A. Substation incoming line equipment and secondary switchgear are included in other
Supplemental Specifications within Division 16.
B.
1.03
Concrete equipment pads are included in P-610.
SUBMITTALS
A. Submit, in accordance with GP-50-03, shop drawings and product data, of the following:
1.
Equipment elevations and side views, floor plan, one-line diagram, dimensions, weight,
packaging for shipment, and installation
2.
Field wiring diagrams for power and control circuits.
3.
Bus arrangement, materials, ratings and insulation details.
4.
Conduit entry/exit locations.
5.
Transformer nameplate information.
6.
Component list.
7.
Cable terminal sizes.
8.
Ratings including:
a. KVA
b. Primary and secondary voltage.
c. Taps
d. Primary and secondary continuous current
e. Basic Impulse Level
f. Impedance.
g. Insulation class and temperature rise
h. Sound level.
9.
Seismic certification as specified.
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B.
Submit Factory Test Reports
1.
C.
Tests shall be performed in accordance with the provisions of IEEE C57.1291 and shall
include, as a minimum, the following tests:
a. Ratio
b. Polarity
c. Resistance measurements of all windings
d. Applied voltage test
e. Induced voltage test
f. No load loss
g. Load loss
h. Excitation current
i. Impedance voltage
j. Partial discharge
Submit Operation and Maintenance Data
1.
1.04
June 2016
Installation and maintenance manuals including procedures for cleaning unit and replacing
components.
REFERENCE STANDARDS
A. American National Standards Institute (ANSI)
B.
1.
ANSI C57.12.01 Standard General Requirements for Dry-Type Distribution and Power
Transformers including those with solid cast and/or Resin-Encapsulated Windings.
2.
ANSI C57.12.51 Requirements for Ventilated Dry-Type Power Transformers, 501 KVA
and Larger, Three-Phase with High-Voltage 601 to 34,500 Volts, Low Voltage 208Y/120
to 4160 Volts.
National Electrical Manufacturers Association (NEMA)
1.
C.
NEMA ST 20 Dry Type Transformers for General Applications
Institute of Electrical and Electronic Engineers (IEEE)
1.
IEEE C57.1291 Test Code for Dry-Type Distribution and Power Transformers
D. Transformers shall be designed, built and tested in accordance with the latest revision of the
above standards.
E.
1.05
Where reference is made to one of the above standards, the revision in effect at the time of bid
opening shall apply.
QUALITY ASSURANCE
A. The equipment furnished under this Section shall be the product of a manufacturer who has
produced this same type of equipment for a period of at least 10 consecutive years.
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B.
June 2016
Transformers shall be designed, assembled and tested by the manufacturer of the core and coil
assemblies used in the transformer.
PART 2 PRODUCTS
2.01
CONSTRUCTION REQUIREMENTS
A. The Transformer core shall be constructed of quality non-aging silicon steel laminations with
high magnetic permeability and low hysteresis and eddy current losses. Magnetic flux densities
are to be kept well below the saturation point. Core laminations shall be step-lap miter cut at the
core corners to reduce hot spots, core loss, excitation current, and sound level. The core
laminations shall be clamped together with heavy steel members to minimized gaps.
B.
Transformers shall be dry type with both primary and secondary coils encapsulated with epoxy
resin using vacuum pressure impregnation, mounted in a ventilated NEMA 1 or 3R enclosure as
required by location of installation shown on the Drawings. Windings shall be copper.
C.
Transformer shall be future forced air (FFA). The transformer shall have provisions for future
forced air cooling.
D. Insulation system shall utilize Class H material in a fully rated 220 degrees C system.
E.
The transformer shall be designed for a temperature rise of 150 degrees C.
F.
Transformer primary winding shall have four full capacity, 2.5 percent taps, two above and two
below rated voltage. No load tap connections shall be made by tap links.
G. Primary terminations shall be designed for close-coupled flange or cable terminal compartment
as required.
H. Secondary terminations shall be designed for close-coupled flange or cable terminal
compartment or busway flange as required.
I.
The transformer shall have vibration isolation pads installed between core and coil assembly
and enclosure base structures.
J.
The transformer shall be UL labeled.
K. The transformer sound level shall not exceed the maximum specified by ANSI C57.12.01 for
applicable KVA size of dry-type transformer.
L.
The enclosure shall be constructed of heavy gauge sheet steel and shall be finished to match
primary and secondary equipment paint color applied using an electrostatically deposited dry
powder paint system to a minimum of three mils average thickness.
M. The transformer shall have Metal-oxide, gapless-type lightning arrestors mounted and wired
inside the primary terminal compartment.
N. The core shall be grounded to the transformer frame and enclosure.
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2.02
June 2016
RATINGS
A. Transformers shall have the following ratings:
B.
2.03
1.
KVA rating: AA/FFA
2.
Primary voltage: 13.2 kV, Solidly Grounded
3.
Primary BIL 60 kV
4.
Secondary voltage: 480V
5.
Secondary BIL 1 kV
6.
3 Phase, 60 Hz
7.
Impedance: Less than 2000 kVA, 5.75%, 2000 kVA or more 6.00%, plus or minus 7-1/2%
Surge arrester shall have the following ratings:
1.
9 kVrms MCOV rating
2.
13200 Vrms Nominal Voltage
ACCESSORIES
A. The transformer shall be furnished with the following accessories:
2.04
1.
Transformer shall be provided with a stainless steel diagrammatic nameplate.
2.
Power source for fans shall be provided for forced air-cooling and future forced aircooling.
3.
Temperature thermostats shall be provided, one per phase.
4.
A strip heater shall be provided.
5.
Two ground pads shall be provided.
6.
Provisions for lifting and jacking.
7.
A grounding resistor shall be provided.
ACCEPTABLE MANUFACTURERS
A. GE Electric Company
B.
Hammond Power Solutions Inc.
C.
Eaton Cutler-hammer
D. Square D
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E.
ABB
F.
Or approved equal.
June 2016
PART 3 EXECUTION
3.01
INSTALLATION
A. Install the transformer in accordance with the manufacturer's recommendations.
B.
The transformer shall be mounted on a concrete pad unless otherwise indicated on the
Drawings.
C.
Make sure the transformer is level.
D. Check for damage and loose connections.
E.
Mount transformers on suitable isolation pad to minimize vibrations.
F.
Install seismic restrain where indicated on the Drawings.
G. Adjust taps to deliver appropriate secondary voltage.
H. Check operation of fans, motors, relays and other auxiliary devices
3.02
FIELD TESTING
A. Perform tests in accordance with the provisions of IEEE C57.1291.
END OF SECTION
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June 2016
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