Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
G92/CICTSP-E0005 -- UB
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
i of i
TABLE OF CONTENTS
PART 1 – GENERAL ............................................................................................................................. 1
1.01 SUMMARY ........................................................................................................................... 1
1.02 REFERENCES ....................................................................................................................... 2
1.03 DEFINITIONS ....................................................................................................................... 4
1.04 SYSTEM DESCRIPTION ...................................................................................................... 4
1.05 SUBMITTALS ....................................................................................................................... 6
1.06 QUALITY ASSURANCE ...................................................................................................... 8
1.07 DELIVERY STORAGE AND HANDLING ........................................................................... 8
1.08 PROJECT CONDITIONS ....................................................................................................... 9
1.09 SCHEDULING ....................................................................................................................... 9
1.10 WARRANTY ......................................................................................................................... 9
1.11 SYSTEM START UP, EMPLOYERS INSTRUCTIONS AND COMMISSIONING............... 9
1.12 MAINTENANCE ................................................................................................................... 9
PART 2 – PRODUCTS ......................................................................................................................... 10
2.01 MANUFACTURED UNITS ................................................................................................. 10
2.02 COMPONENTS ................................................................................................................... 11
2.03 ACCESSORIES.................................................................................................................... 11
2.04 FINISHES ............................................................................................................................ 12
2.05 SOURCE QUALITY CONTROL ......................................................................................... 12
PART 3 – EXECUTION ....................................................................................................................... 14
3.01 FIELD QUALITY CONTROL ............................................................................................. 14
3.02 DEMONSTRATION ............................................................................................................ 14
LIST OF TABLES
TABLE 1 - TRANSFORMER LOCATION ............................................................................................ 1
TABLE 2 - ASTM TRANSFORMER OIL STANDARDS .................................................................... 13
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Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
G92/CICTSP-E0005 – UB
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
1 of 14
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MEDIUM VOLTAGE
TRANSFORMER
PART 1 – GENERAL
1.01
SUMMARY
A.
B.
Section includes
1.
Requirements for design, manufacturing, furnishing, integration, shop assembly,
inspection, factory testing, installation supervision, pre-commissioning test,
commissioning tests, support up to the date of the ACP’s issuance of Taking-Over
Certificate, testing after completion, training services and maintenance of eighteen
(18) 12kV-480/277V and six (6) 12kV-4.16/2.4kV three phase, two winding, 60 Hz,
outdoor, liquid-filled type, 65°C rise, self-cooled pad-mounted transformers for each
of the two (2) locks as shown on the Drawings complete with all accessories as
hereinafter specified. The work shall include all necessary and equipment and
appurtenances for the safe, efficient, and reliable operation of the equipment within
the scope of this specification whether or not such items are specifically referred to in
the specification. The work shall also include start-up spare parts and special tools
required for erection.
2.
The pad-mounted transformers will be installed outdoors, near the electrical room in
the Locks Complex, to step down voltage for the 480/277V Motor Control Centers
(MCCs) and the 4160V fire pumps.
Products Supplied But Not Installed Under This Section:
Table 1 - Transformer Location
Transformer
Location (at both Locks)
ELR1-MVT-NORTH
Outside of MR-G1 NORTH
ELR1-MVT-SOUTH
Outside of MR-G1 SOUTH
ELR2-MVT-NORTH
Outside of MR-G2 NORTH
ELR2-MVT-SOUTH
Outside of MR-G2 SOUTH
ELR3-MVT-NORTH
Outside of MR-G3 NORTH
ELR3-MVT-SOUTH
Outside of MR-G3 SOUTH
ELR4-MVT-NORTH
Outside of MR-G4 NORTH
ELR4-MVT-SOUTH
Outside of MR-G4 SOUTH
ELR5-MVT-NORTH
Outside of MR-V5 NORTH
ELR5-MVT-SOUTH
Outside of MR-V5 SOUTH
ELR6-MVT-NORTH
Outside of MR-V6 NORTH
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Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
G92/CICTSP-E0005 – UB
C.
1.02
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
2 of 14
Transformer
Location (at both Locks)
ELR6-MVT-SOUTH
Outside of MR-V6 SOUTH
ELR7-MVT-NORTH
Outside of MR-V7 NORTH
ELR7-MVT-SOUTH
Outside of MR-V7 SOUTH
ELR8-MVT-NORTH
Outside of MR-V8 NORTH
ELR8-MVT-SOUTH
Outside of MR-V8 SOUTH
LDER1-MVT
LDER1
LDER2-MVT
LDER2
FER1-MVT1
Outside of FER1
FER1-MVT2
Outside of FER1
FER1-MVT3
Outside of FER1
FER2-MVT1
Outside of FER2
FER2-MVT2
Outside of FER2
FER2-MVT3
Outside of FER2
Related Sections
1.
G00/CICTSP-G0002 (Section 01 93 01)
Maintenance Documentation Package
2.
G00/CICTSP-E0003 (Section 26 00 00)
General Electrical Requirements
3.
G92/CICTSP-E0006 (Section 26 13 00)
Medium Voltage Switchgear
4.
G91/CICTSP-E0007 (Section 26 24 19)
Motor Control Centers
REFERENCES
A.
All work shall be in accordance with all applicable laws and regulations of the Republic
of Panama, Autoridad del Canal de Panama and industry standards. References to these
documents are to the latest issue date of each document, unless otherwise indicated,
together with the latest additions, addenda, amendments, supplements, etc., thereto, in
effect as of the date of contract for the work. Abbreviations listed indicate the form used
to identify the reference documents in the Specification text. The specified equipment
shall be designed and constructed in accordance with the Standards listed reference in
this Section or the referenced sections of the Employer Requirements.
B.
American Society for Testing and Materials (ASTM) International Standards
1.
ASTM D 92-05a
Standard Test Method for Flash and Fire Points by
Cleveland Open Cup Tester
2.
ASTM D 445
Standard Test Method of Transparent and Opaque Liquids
(and the calculation of Dynamic Viscosity)
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Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
G92/CICTSP-E0005 – UB
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
3 of 14
3.
ASTM D 877
Standard Test method for Dielectric Breakdown Voltage of
Insulating Liquids Using Disk Electrodes
4.
ASTM D 924
Standard Test Method for Dissipation Factor (or Power
Factor) and Relative Permittivity (Dielectric Constant) of
Electrical Insulating Liquids
5.
ASTM D 971
Standard Test Method for Interfacial Tension of Oil against
Water by the Ring Method
6.
ASTM D 974
Standard Test method for Acid and Base Number by ColorIndicator Titration
7.
ASTM D 1500
Standard Test Method for ASTM Color of Petroleum
Products (ASTM Color Scale)
8.
ASTM D 1524
Standard Test method for Visual Examination of Used
Electrical Insulating oils of Petroleum Origin in the Field
9.
ASTM D 1533
Standard Test Method for Water in Insulating Liquids by
Coulometric Karl Fischer Titration
10.
ASTM D 3951
Standard Practice for Commercial Packaging
C.
Autoridad del Canal de Panamá (ACP) Employer Requirements (ER):
1.
Section 01 10 00
General Project Requirements
2.
Section 01 33 00
Submittal Procedures
3.
Section 01 40 00
Quality Requirements
4.
Section 01 77 00
Taking-Over Procedures
5.
Section 01 78 23
Operations Data
6.
Section 01 79 00
Demonstration and Training
7.
Section 01 86 13
Plant Mechanical Systems and Equipment
8.
Section 01 91 00
Tests on Completion and Tests After Completion
9.
Section 01 92 00
Facility Operation
10.
Section 01 93 00
Maintenance Services
11.
Section 09 90 00
Painting
12.
Section 26 05 53
Identification for Electrical Systems
13.
Section 26 90 00
Field Testing Electrical Systems
14.
Section 40 00 00
Process System Integration
D.
Grupo Unidos Por el Canal (GUPC) Documents:
1.
G00/CICCADD-G0001 CADD Manual
2.
G80/CICDSR-E0001
Integration Management Plan
3.
G00/CICTCR-G0001
Nomenclature and Identification Plan
4.
G00/UPCQMM0001
Quality Management Manual
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Contract No. CMC-221428, Design and Construction of the Third Set of Locks
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E.
14-Jul-10
Page:
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1.
IEEE Std C57.12.00
Standard General Requirements for Liquid-Immersed
Distribution, Power, and Regulating Transformers
2.
IEEE Std C57.12.29
Standard for Pad-Mounted Equipment-Enclosure Integrity
for Coastal Environments
3.
IEEE Std C57.12.34
Standard Requirements for Pad-Mounted CompartmentalType, Self –Cooled, Three-Phase Distribution Transformers
(2500 kVA and Smaller) - High-Voltage: 34500
GrdY/19200 Volts and Below; Low-Voltage, 15 kV
Nominal system Voltage and Below
4.
IEEE Std C57.12.70
Standard Terminal Markings and
Distribution and Power Transformers
5.
IEEE Std C57.12.80
Standard Terminology for Power Distribution Transformers
6.
IEEE Std C57.12.90
Standard Test Code for Liquid-Immersed Distribution,
Power, and Regulating Transformers
7.
IEEE Std 386
Standard for Separable Insulated Connector Systems for
Power Distribution Systems Above 600 V
Connections
for
National Electrical Manufacturers Association (NEMA)
1.
G.
1.04
Date:
Institute of Electrical and Electronics Engineers (IEEE) Standards
F.
1.03
TECHNICAL SPECIFICATION
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
NEMA TR1
Transformers, Regulators and Reactors
International Organization for Standardization (ISO) Standards:
1.
ISO 9001
Quality Management Systems. Requirements
2.
ISO 10005
Quality Management Systems. Guidelines for Quality Plans
DEFINITIONS
A.
All numerical data shall be presented in SI units.
B.
The term “Employer” as used in this specification refers to the Autoridad del Canal de
Panamá (Panama Canal Authority, ACP).
C.
The term “Contractor” as used in this specification refers to the Grupo Unidos Por el
Canal (GUPC).
D.
The term “Supplier” as used in this specification refers to any person or firm submitting a
proposal to meet the terms set forth herein.
SYSTEM DESCRIPTION
A.
Design Requirements
1.
All medium voltage pad mounted transformers shall be designed as per the
requirements specified herein.
2.
The medium voltage (MV) liquid-filled pad-mounted transformers shall be used to
step down power from the Locks’ 12 kV distribution level to the 4.16/2.4 kV and
480V/277 volts levels for equipment use as required for the fire pumps medium
voltage system and the low power distribution system for the Third Set of Locks.
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Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
G92/CICTSP-E0005 – UB
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
5 of 14
3.
The Supplier shall furnish pad-mounted transformers as specified, outdoor, with flame
retardant biodegradable and ambient friendly oil, three-phase, 60 Hz, as specified
herein.
4.
The ratings of the transformers shall be as follows:
a.
kVA Rating @ 65°C Self- As shown on Drawings (6 x 2000 kVA, 12 x
Cooled
1500 kVA and 6 x 750 kVA)
b.
Phase
3
c.
Frequency
60 Hz
d.
High Voltage
12000 [Delta]
e.
Low Voltage
1) MCC Feeders
480/277V [Wye]
2) Fire Pump Feeders
4.16/2.4kV [Wye]
f.
Winding Material (High - Copper - Copper
Low)
g.
HV BIL
h.
LV BIL
95 kV
1) MCC Feeders
30kV
2) Fire Pump Feeders
60kV
i.
Self-Cooled impedance
5.75% ± 7.5%
j.
HV de-energized Taps
Two 2 ½ percent above and two 2 ½ percent
below
k.
The transformers shall be three phase, 60 Hz, self-cooled, No-Load high voltage
tap changer and be filled with flame retardant, biodegradable and ambient
friendly oil. The no-load tap changer shall be manual with means of padlocking
the operating handle in each tap position and provided with tap position
indicator.
l.
For continuous operation at nominal rating, kVA self cooled, the average
winding temperature rise by resistance measurement shall not exceed 65°C, with
hottest-spot winding temperature rise not to exceed 80°C and the temperature rise
of the insulating oil shall not exceed 65ºC when measured near the top of the
tank, according to IEEE Std C57.12.00 and IEEE Std C57.12.34.
m.
The core and coil assembly shall be designed and manufactured to meet the
short-circuit requirements of IEEE C57.12.00.
n.
Transformer regulation for the rated voltage, kVA and frequency shall be
determined in accordance with IEEE Std C57.12.00.
5.
Site Data
a.
Equipment shall be designed for outdoor installation in a high humidity coastal
environment with a minimum life expectancy of 40 years under the project
conditions specified in Section 1.08.
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b.
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
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Equipment and components shall be designed and constructed to resist the effects
of earthquake motions in accordance with IBC 2006 and ASCE 7-05. The
following criteria shall be used to certify seismic compliance:
1) Atlantic Side:
a) Component Importance Factor, Ip = 1.5
b) Design Spectral Response Acceleration at Short Periods:
(1) SDS =
0.85g
2) Pacific Side:
a) Component Importance Factor, Ip = 1.5
b) Design Spectral Response Acceleration at Short Periods:
(1) SDS =
6.
1.60g
Utility Data
Frequency
Voltages Available
7.
B.
1.05
60 Hz
12000 V, 3-phase
480 V, 3-phase
208 V, 3-phase
120 V, 1-phase
125 VDC
The Supplier shall meet all applicable requirements of Section 40 00 00 (Process
System Integration).
Performance Requirements
1.
The transformers in operation at all load levels shall not exceed the audible levels
indicated in NEMA TR1.
2.
The equipment supervision and control performance shall be in accordance with the
requirements of Section 40 00 00 (Process System Integration) of the Employer’s
Requirements.
SUBMITTALS
A.
General
1. The Supplier shall comply with the Submittal requirements specified in the Employer
Requirements, Section 01 33 00 (Submittal Procedures).
B.
Maintenance Documentation Package
1. The Supplier shall provide the Maintenance Documentation package as specified in
Document G00/CICTSP-G0002 (Maintenance Documentation Package).
C.
Nomenclature and Identification Plan
1. The Supplier shall identify and code all the supplied equipment, component and parts in
accordance with the requirements of Document G00/CICTCR-G0001 (Nomenclature and
Identification Plan). All information shall be provided in electronic data base format to be
approved by the Contractor.
D.
Integration
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TECHNICAL SPECIFICATION
Date:
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SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
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1. The Contractor is providing a fully integrated and functional Canal transportation system
that requires full integration of electrical and mechanical support systems to meet the
operation objectives of the Employer. The Supplier shall provide all the necessary
technical information, shall participate in the Integration Team and provide all the
coordination necessary to ensure that the equipment and components specified in this
Section are fully integrated.
2. The Supplier shall provide all the information; and participate in the integration team as
required in Document G80/CICDSR-E0001 (Integration Management Plan).
E.
CADD Drawings
1. The Supplier shall provide three-dimensional CADD outline drawings of major
equipment items supplied, in Autodesk Revit 2010-compatible format. Supplier shall also
provide the required equipment modeling information compatible with Autodesk Revit.
2. Drawing content and format shall be in conformance with Contractor's CADD Manual,
document G00/CICCAD-G0001 (CADD Manual).
F.
All electrical drawings shall be prepare and submitted in AutoCad Electrical 2010 format.
Other type of drawings shall be submitted in AutoCad 2010 format.
G.
Product Data
1.
H.
The Supplier shall submit copies (hard and electronic) of the drawings and complete
technical literature (including datasheets and time-current characteristic curves for
protective devices) describing the equipment to be furnished.
Shop Drawings
1.
The O&M manual shall include complete system description, components and
procedures for installation, maintenance and operation and a reduced size copy of the
“as-built’ drawings shall be included in the manuals.
2.
Detailed dimensional drawings, including equipment weight and accessories
3.
Structural loading drawings and certification of compliance with the specified seismic
design requirements for each of the sites
4.
Connection diagrams and schematic diagram drawings
5.
Nameplate drawing/information
6.
Material safety data sheets for oil and any other chemical being supplied
I.
Quality Assurance/Control Submittals
1.
For submittal procedures and general requirements refer to ACP ER Section 01 33 00
(Submittal Procedures).
2.
Manufacturer's Instructions
a.
3.
Supplier shall submit copies of installation manuals and field test procedures for
the pad-mounted transformers. The manufacturer's pass/fail criteria for field tests
shall also be included
Manufacturer's Test Reports
a.
Certified factory test reports
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Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
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J.
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Maintenance documentation in accordance with G00/CICTSP-G0002 (Maintenance
Documentation Package)
QUALITY ASSURANCE
A.
General
1.
For quality assurance general requirements refer to document G00/UPCQMM0001
(Quality Management Manual) and ACP ER Section 01 40 00 (Quality
Requirements).
2.
In the event of a conflict between the referenced standards and this Specification, the
Supplier shall notify the Contractor and secure a written clarification as to what is
acceptable before proceeding with the work.
B.
Qualifications
1.
C.
1.07
Date:
Closeout Submittals
1.
1.06
TECHNICAL SPECIFICATION
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Manufacturer shall be a firm specialized in manufacturing pad mounted transformers
with minimum of ten years experience.
Certifications
1.
All transformers shall be UL listed and bear the UL label
2.
Transformers
Transformers
shall
be
listed/approved
as
“Less-Flammable
Liquid-Filled
DELIVERY STORAGE AND HANDLING
A.
Packaging and Marking
1.
All equipment, spare parts, tools, and inventory, shall be protected to withstand rough
handling and corrosive environments during ocean shipment. Packing shall be in
accordance with ASTM D 3951.
a.
Corrosion Prevention: All finished parts and surfaces that are subject to corrosion
shall be coated and protected with a corrosion-resistant compound.
b.
Materials and Equipment Cleaning: The equipment, spare parts, tools, inventory,
and materials shall be clean and free of all foreign material.
c.
Repainting: The surfaces of each equipment where paint has been damaged
during shipment shall be cleaned and touched-up with a surface preparation and
paint matching the approved coating system.
2.
Delivery
a.
The Contractor shall deliver the equipment and components in accordance with
these specifications. Items that, in the opinion of the Employer’s Representative,
are damaged or defective shall be replaced by the Contractor at its own cost.
Unless otherwise indicated, each lock gate shall be delivered to its designated
destination, in accordance with the Contract’s delivery schedule.
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1.08
TECHNICAL SPECIFICATION
Date:
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SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
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PROJECT CONDITIONS
A.
Existing Conditions
1.
Site Data
Elevation
Ambient Temperature
Relative Humidity
Vibration
Wind Speed
Other
1.09
1.10
SCHEDULING
A.
The Supplier shall comply with the Contractor’s schedule to the design of the project
Intermediate, Final and Issued-For-Construction activities and coordination with other
Suppliers.
B.
The schedule shall be as stated in the Request for Proposal.
WARRANTY
A.
1.11
The warranty shall be as stated in the Request for Proposal.
SYSTEM START UP, EMPLOYERS INSTRUCTIONS AND COMMISSIONING
A.
1.12
0 – 610 m above sea level
10°C (50°F) to 40°C (104 °F) with an average of 30°C
(86°F)
From 60 to 95%, non-condensing, with an average of
88%
5 Hz to 30 Hz with peak random vibrations of 2g
130 km/hr (80 miles/hr) steady, in any direction, gust
factor of 1.3
Salty water in air, fog
Support during start-up, Employer’s Instructions and Commissioning shall be as
specified in Part 3 of this Section.
MAINTENANCE
A.
The Supplier shall provide as an option a 3-Year maintenance Service starting after the
issuance of the Taking Over Certificate (TOC) by Employer in full compliance with
Section 01 93 00 (Maintenance Services).
B.
The work shall also include start-up spare parts and special tools required for erection.
C.
Supplier shall furnish a list of recommended spare parts for 3 years of operation. The list
shall indicate which parts the Supplier recommends be carried in stock. The catalog
number, lead-time and price shall be included.
1.
An extra set of overcurrent protection fuses shall be provided for each transformer.
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TECHNICAL SPECIFICATION
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SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
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PART 2 – PRODUCTS
2.01
MANUFACTURED UNITS
A.
The transformers shall consist of a transformer tank and full-height, bolt-on high- and
low-voltage cable terminating compartments located side-by-side separated by a rigid
metal barrier. Each compartment shall have separate doors, designed to provide access to
the high-voltage compartment only after the low-voltage has been opened. The high
voltage door is held closed by captive stainless steel fastening device, accessible only
after the low voltage door is opened. Doors shall be mounted flush with the cabinet
frame. The low-voltage door shall have a handle-operated, three-point latching
mechanism designed to be secured with a single padlock. A hex-head or penta-head bolt
shall be incorporated into the low-voltage door latching mechanism. Both high and lowvoltage doors shall be incorporated into the low-voltage door latching mechanism. Both
high and low-voltage doors shall be equipped with stainless steel hinges and door stops to
secure them in the open position.
B.
The transformers base must be designed to allow rolling or skidding in any direction.
C.
Transformers shall be supplied with a welded main tank cover and be of a sealed-tank
construction designed to withstand a pressure of 7 psig without permanent distortion and
15 psig without rupturing or displacing components of the unit or affecting cabinet
security. The tank cover shall be designed to shed water and be supplied with a tamperresistant access handhole sized to allow access to internal bushing and switch
connections. The transformer shall remain effectively sealed for a top-oil temperature of 5 oC to 105 oC. When necessary to meet the temperature rise rating specified above, flatcooling panels shall be provided.
D.
Compartment sills, doors and covers shall be removable to facilitate cable pulling and
installation. The high-voltage door shall be on the left with the low-voltage door on the
right.
E.
Compartments shall be designed for cable entry from below and shall be sized to the
minimum dimensions of IEEE Std C57.12.34. Low voltage compartment for the 12 kV 480/277 V transformers shall be provided with the additional cable entry area required to
allow the use of non-segregated phase bus duct or cable bus duct on the low voltage side.
F.
The transformers shall be compartmental-type, self-cooled and tamper-resistant for
mounting on a pad. The unit shall restrict the entry of water (other than flood water) into
the compartments so as not to impair its operation. There shall be no exposed screws,
bolts or other fastening devices which are externally removable.
G.
Transformer oil must be biodegradable, ambient friendly, flame retardant type. Oil fluid
shall be Envirotemp® FR3® fluid from Cooper Power Systems or an equivalent ambient
friendly fluid. The transformer manufacturer shall certify that the transformer's oil is
Non-PCB containing no PCB's.
H.
The core material shall be high-grade, grain-oriented, non-aging silicon core steel with
high magnetic permeability, low hysteresis and eddy current losses. Magnetic flux
densities are to be kept well below saturation to allow for a minimum of 10 percent over
voltage excitation. The cores shall be properly annealed to reduce stresses induced during
the manufacturing processes and reduce core losses.
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2.02
Date:
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I.
The core frame shall be designed to provide maximum support of the core and coil
assembly. The core frame shall be welded or bolted to ensure maximum short-circuit
strength.
J.
A C200 neutral bushing CT shall be provided on each transformer (2000-5A for MCC
transformers and 1000-5A for Fire Pump transformers). Secondary terminals shall be
wired to a shorting type terminal block.
COMPONENTS
A.
Bushings
1.
Transformers shall be provided with high-voltage integral bushings Radial-Feed
configuration on the high-voltage compartment of the transformers suitable for loadbreak elbow terminations, 200A and 15kV class, 95kV BIL rating. Elbows
terminations shall include insulating plugs with test point and test point caps. The
bushings shall comply with IEEE C57.12.00 and C57.12.34.
2.
Transformers shall be provided with four epoxy or porcelain bushings enclosed in
low-voltage compartment as per IEEE C57.12.34. Terminal shall be copper plated
with NEMA hole configuration per IEEE C57.12.34. Bushings shall be rated for full
transformer capacity. Bushings shall be able to be replaced, hand holes must be
provided if necessary.
B.
Over-Current Protection
1.
C.
2.03
TECHNICAL SPECIFICATION
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Over-current Protection: Transformers shall be protected for internal transformer fault
and thermal protection. The transformer shall have a two-fuse protection scheme
consisting of a bayonet type cutout in series with oil immersed expulsion currentlimiting fuses. The bayonet type cutout shall be located in the primary compartment,
shall be of the load-break type (load break current of 100 amperes minimum) and be
hot-stick operable to permit external replacement of fuses and the disconnection of the
apparatus from the line. The two-fuse protection scheme shall have a minimum shortcircuit rating of 18 kA.
Reserved
ACCESSORIES
A.
Each of the transformers shall be furnished complete with the following features and
accessories:
1.
Lifting hooks for lifting the completely assembled transformer.
2.
Jack pads on case bottom for jacking complete transformer.
3.
One or more hand-holes and manholes on cover for leads connection access and
bushing removal.
4.
Tank with welded cover suitably braced for partial vacuum, and capable of vacuum
filling in the field.
5.
Magnetic liquid gauge.
6.
Dial-type liquid temperature indicator.
7.
Transformer gas pressure/vacuum gauge
© CICP
CONSULTORES INTERNACIONALES
Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
G92/CICTSP-E0005 – UB
2.04
2.05
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
12 of 14
8.
Upper filter press inlet 1” valve.
9.
Lower filter press outlet 1” valve-drain with sampling device.
10.
Automatic reset pressure-relief device with a flow of 35 SCFM at sea level and 15 psi
at the transformer tank.
11.
Two tank-grounding pads tapped for and furnished with suitable connectors for 350
kcmil bare stranded copper ground cable.
12.
Standard diagrammatic nameplate conforming to IEEE C57.12.00
13.
Non-PCB label.
14.
Skid surface provisions.
15.
High temperature pre-alarm and alarm sensor with remote indication.
FINISHES
A.
All interior and exterior ferrous metal shall be cleaned and painted with corrosion
protective coating system as per IEEE C57.12.29 and Section 09 96 00 (Corrosion
Control Coatings) of the Employer’s Requirements.
B.
The coating color of the transformer tank, including radiators, shall be ANSI Standard 61
Light Gray.
SOURCE QUALITY CONTROL
A.
Factory Testing shall be as specified in the Employer’s requirements Section 01 40 00
(Quality Requirements), Item 1.10 (Quality Control and Verification of the Works).
B.
The following standard factory tests shall be performed in accordance with the latest
revision of the applicable ASTM and IEEE standards.
1.
Factory Tests: The following standard factory tests shall be performed on the
equipment provided under this Section.
a.
Resistance measurements of all windings on the rated voltage connection of each
unit and at the top extremes.
b.
Ratio tests on the rated voltage connection and on all tap connections.
c.
Polarity and phase relation tests on the rated voltage connection.
d.
No-load losses at rated voltage and frequency on the rated voltage connection.
e.
Excitation current at rated voltage on the rated voltage connection.
f.
Impedance and load losses at rated current and frequency on the rated voltage
connection.
g.
Temperature rise tests, at minimum and maximum ratings shall be made when
there is no record available of a temperature test, made in accordance with IEEE
standards, on a unit with essentially the same thermal characteristics.
h.
Applied potential tests to determine the adequacy of the barrier insulation and the
space between windings and ground.
i.
Induced potential test to verify the turns insulation.
j.
Dielectric Tests
© CICP
CONSULTORES INTERNACIONALES
Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
G92/CICTSP-E0005 – UB
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
13 of 14
k.
Low Frequency
l.
Lightning Impulse Test
C.
Defective material or material damaged in the course of shipment, transportation or test
shall be replaced or repaired in a manner meeting with the approval of the Employer’s
Representative.
D.
Manufacturer shall test the transformer oil as per the ASTM standards listed below. The
following oil characteristics (based on Envirotemp FR3 fluid from Cooper Power
Systems) are considered acceptable:
Table 2 - ASTM Transformer Oil Standards
PROPERTY
Dielectric strength, 0.100" gap
VALUE
50 kV min
ASTM No.
D877
Neutralization number, mg
0.06 max
D974
Color
L0.5 max
D1500
Clear, light green
D1524
Moisture content, mg/kg
50 max
D1533
Interfacial tension, dynes/cm
35 min
D971
Dissipation factor @ 25°C, %
0.06 max
D924
Power factor @ 100°C, per cent
3.0 max
D924
Flash point, °C
300 min
D92
Fire point, °C
340 min
D92
Viscosity @ 100°C, cSt
9 max
D445
Viscosity @ 25°C, cSt
35 max
D445
Condition, visual clear
E.
Contractor reserves the right to conduct any of the tests listed above. The comparison
shall be supplied by the oil (fluid) manufacturer.
F.
Supplier shall submit certified factory test reports of all factory tests performed by the
manufacturer, including tests required by the applicable standards. Results of factory tests
performed shall be certified by the manufacturer, or an approved testing laboratory, and
submitted following successful completion of the tests.
© CICP
CONSULTORES INTERNACIONALES
Contract No. CMC-221428, Design and Construction of the Third Set of Locks
Doc. No.:
G92/CICTSP-E0005 – UB
TECHNICAL SPECIFICATION
Date:
14-Jul-10
SECTION 26 12 19 – PAD MOUNTED LIQUID FILLED MV
TRANSFORMERS
Page:
14 of 14
PART 3 – EXECUTION
3.01
3.02
FIELD QUALITY CONTROL
A.
The Supplier shall provide services of a qualified factory-trained manufacturer’s
representative to assist the Contractor in installation and startup of the equipment
specified under this section. The manufacturer’s representative shall provide technical
direction and assistance to the Contractor in general assembly of the equipment,
connections and adjustments, and testing of the assembly and components contained
herein. After the equipment is put in Service, Contractor will run a performance test on
the equipment under the Supervision of the Supplier to ascertain that it is performing
according to the warranty in every respect. Supplier shall promptly remedy any
deficiencies brought out by this test at no cost to Contractor. The Supplier shall provide
three (3) copies of the manufacturer’s field startup report.
B.
In addition to providing support during the installation, the Supplier shall provide support
during the Pre-Commissioning Test and Commissioning Test up to issuance of the
Taking Over Certificate by Employer and Test After Completion two years after the date
of the Taking-Over Certificate as specified in the Employer’s Requirements Section 01
91 00 (Tests on Completion and Tests after Completion).
DEMONSTRATION
A.
The Supplier shall provide training to the Employer as specified in the Employer’s
Requirements Section 01 79 00 (Demonstration and Training).
B.
Upon completion of the installation, the Supplier shall instruct the Employer in the
operation and maintenance of the equipment.
END OF SECTION
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