CITY OF LIVERMORE
COMMUNITY DEVELOPMENT DEPARTMENT
ADDENDUM NO. 3
TO THE
WRP ELECTRICAL IMPROVEMENTS
PROJECT NO. 2008-48
IN THE CITY OF LIVERMORE
July 17, 2015
This addendum consists of these 2 pages and 13 pages of supporting information. All
prospective bidders for the above referenced project are to be aware that the following
changes, additions, and/or clarifications shall be included as an integral part of the
contract drawings and specifications for the above referenced project and that they are
bound by all conditions set forth therein. The Bid Opening date has been changed to
2:30 pm on Tuesday, July 28, 2015.
THE BIDDER SHALL SIGN AND INCLUDE THIS FORM IN HIS SEALED BID
PACKAGE AND/OR FILL IN THE ADDENDUM NUMBER ON PAGE 1 OF
DOCUMENT 00410 “BID FORMS” AS ACKNOWLEDGMENT OF RECEIPT.
FAILURE TO INCLUDE THIS FORM AND/OR FILL IN THE ADDENDUM
NUMBER IN THE BID FORMS MAY BE CAUSE FOR THE DISQUALIFICATION
OF HIS BID.
Todd Yamello, P.E.
Project Engineer
________________________________________________________
Company Name
____________________
Date
_______________________
Representative
Addendum No.3
City Project No. 2008-48
Page 2 of 2
The following changes have been made to the Specifications.
Table of Contents - Specifications
Add the following:
“Section 16274-Liquid Filled Substation Transformers”
Document 00100 – Notice Inviting Bids
The bid date in Article N-2 shall be changed to the following:
“2:30 pm on Tuesday, July 28, 2015”
Section 16274-Liquid Filled Substation Transformers
Add Section 16274 which is included as an attachment to this Addendum No. 3.
Appendix B
Add the contractor sign in sheet from July 16, 2015 site visit which is included as an
attachment to this Addendum No. 3.
SECTION 16274
LIQUID FILLED SUBSTATION TRANSFORMERS
PART 1
1.01
1.02
GENERAL
SUMMARY
A.
Section includes:
1. 3_phase, liquid filled, substation type transformers.
B.
Related sections:
1. The Contract Documents are complementary; what is called for by one is as
binding as if called for by all.
2. It is the Contractor’s responsibility for scheduling and coordinating the Work of
subcontractors, suppliers, and other individuals or entities performing or
furnishing any of Contractor’s Work.
3. The following sections are related to the Work described in this Section. This
list of related sections is provided for convenience only and is not intended to
excuse or otherwise diminish the duty of the Contractor to see that the
completed Work complies accurately with the Contract Documents.
a. Section 01330 - Submittals.
b. Section 01756 - Testing, Training, and Facility Start-up.
c. Section 16050 - General Requirements for Electrical Work.
d. Section 16075 - Electrical Identification.
REFERENCES
A.
As specified in Section 16050.
B.
American National Standards Institute (ANSI).
C.
ASTM International (ASTM):
1. D877-2 – Standard Test Method for Dielectric Breakdown Voltage of Insulating
Liquids using Disk Electrodes.
D.
Institute of Electrical and Electronic Engineers (IEEE):
1. C57.12.00 - Standard General Requirements for Liquid-Immersed Distribution,
Power, and Regulating Transformers.
2. C57.12.70 - Standard Terminal Markings and Connections for Distribution and
Power Transformers.
3. C57.12.80 - Terminology for Power and Distribution Transformers.
4. C57.12.90 - Standard Test Code for Liquid-Immersed Distribution, Power, and
Regulating Transformers and IEEE Guide for Short-Circuit Testing of
Distribution and Power Transformers.
5. C57.91 - Guide for Loading Mineral-Oil-Immersed Power Transformers up to
and including 100 MVA with 65 degrees or 55 degrees Average Winding Rise.
6. C57.93 - Guide for Installation of Liquid-immersed Power Transformers.
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7.
8.
1.03
E.
National Electrical Manufacturers Association (NEMA):
1. TR-1 - Transformers, Regulators, and Reactors.
F.
U.S. Department of Energy (DOE):
1. 10 CFR Part 431 - Energy Efficiency Program for Certain Commercial and
Industrial Equipment.
DEFINITIONS
A.
1.04
As specified in Section 16050.
SYSTEM DESCRIPTION
A.
1.05
C57.98 - Guide for Transformer Impulse Tests.
C57.106 - Guide for Acceptance and Maintenance of Insulating Oil in
Equipment.
Oil filled substation transformers for operation on a 60 hertz system with voltage
and kilovolt-ampere ratings as indicated on the Drawings:
1. Suitable for continuous operation at full load at the Project location and
elevation after applying any derating factors.
2. Designed for outdoor installation on a concrete pad.
SUBMITTALS
A.
Furnish submittals as specified in Sections 01330 and 16050.
B.
Product data:
1. Complete installation instructions.
2. Complete storage and handling instructions.
3. Kilovolt-ampere rating, including de-rating calculations.
4. Primary/secondary connections.
5. Primary voltage and available taps.
6. Secondary voltage.
7. BIL rating.
8. Temperature rise.
9. Lightning arrester data.
10. %Z, %X, %R, X/R.
11. Efficiency.
12. Gross weight.
13. Torque values for all bolted connections for primary and secondary cable
connections.
14. Manufacturer’s suggested hi-potential test procedures and test levels for field
testing:
a. Initial field test.
b. Subsequent maintenance tests.
15. Certification from the manufacturer stating the transformer design complies
with IEEE C57.
16. Type of oil.
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17.
18.
19.
20.
21.
Gallons of oil.
Weight of oil.
Complete MSDS sheets.
Short-circuit withstand capacities.
For equipment installed in structures designated as seismic design category C,
D, E, or F submit the following as specified in Section 16050:
a. Manufacturer’s statement of seismic qualification with substantiating test
data.
b. Manufacturer’s special seismic certification with substantiating test data.
C.
Shop drawings:
1. Complete detailed, dimensioned drawings showing the equipment being
furnished, with all pertinent information, including the following:
a. Dimensions and locations of conduit or bus connections.
b. Complete details of any required bus modifications.
c. Complete internal wiring diagrams.
d. Grounding details specifying ground pads and pad locations.
e. Support points.
f. Locations of all accessories, bushings, and terminal compartments.
g. Location for floor channels, anchor bolts, and drain valves.
2. Complete nameplate schedule, except impedance.
D.
Installation instructions:
1. Detail the complete installation of the equipment including rigging, moving, and
setting into place.
2. For equipment installed in structures designated as seismic design category A
or B:
a. Provide manufacturer’s installation instructions and anchoring details for
connecting equipment to supports and structures.
3. For equipment installed in structures designated as seismic design category C,
D, E, or F:
a. Provide project-specific installation instructions and anchoring details
based on support conditions and requirements to resist seismic and wind
loads as specified in Section 16050.
b. Submit anchoring drawings with supporting calculations.
c. Drawings and calculations shall be stamped by a professional engineer
registered in the state where the Project is being constructed.
E.
Operating and maintenance manuals:
1. Complete as-built dimensioned and scaled drawings for transformer including
all bus modifications and connections.
2. Recommended periodic maintenance requirements.
3. Maintenance instructions including schedules, parts identification,
troubleshooting, assembly instructions, parts list, and predicted life of parts
subject to wear and deterioration.
4. Recommended field test levels and procedures before installation and for
maintenance purposes after being placed in service.
5. Periodic and preventative maintenance torque values for all bolts.
6. Copies of factory test reports.
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1.06
1.07
1.08
F.
Test reports:
1. Certified copies of test reports from factory tests.
G.
Record documents.
H.
Calculations:
1. Detailed calculations or details of the actual physical testing performed on the
transformers to prove the transformers are suitable for the seismic
requirements at the Project Site.
QUALITY ASSURANCE
A.
As specified in Section 16050.
B.
Manufacturer qualifications:
1. Manufacturer shall be in the business of regularly manufacturing the specified
transformers for minimum 10 years with satisfactory performance record.
DELIVERY, STORAGE, AND HANDLING
A.
As specified in Section 16050.
B.
Ship transformers to the job site on a dedicated air ride vehicle that will allow the
Contractor to utilize onsite off-loading equipment:
1. Each transformer shall be shipped with a global positioning system (GPS) unit
to record the shipping route.
2. Provide monitoring of the acceleration the transformer experiences during
shipment:
a. The GPS unit can record the acceleration.
b. Utilize a G-force gauge that indicates that the acceleration has exceeded
allowed values.
3. Transformers that experience vertical accelerations greater than 3 G or
horizontal accelerations greater than 5 G shall not be accepted.
C.
Furnish temporary equipment heaters within the transformer to prevent
condensation from forming.
PROJECT OR SITE CONDITIONS
A.
1.09
As specified in Section 16050.
SEQUENCING
A.
Make all necessary field measurements to verify the equipment will fit in the
allocated space in full compliance with the minimum clearances required by the
NEC and local codes.
B.
Conduct factory acceptance test and submit certified test results for Engineer’s
review.
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C.
Ship equipment to Project Site after successful completion of factory acceptance
test.
D.
Assemble equipment in the field.
E.
Conduct field acceptance test and submit certified test results for Engineer’s review.
F.
Submit manufacturer’s certification that equipment has been properly installed and
is fully functional for Engineer’s review.
G.
Set taps.
H.
Commissioning and process start-up as specified in Section 01756.
1.10
SCHEDULING (NOT USED)
1.11
WARRANTY
A.
1.12
As specified in Section 16050.
SYSTEM START-UP
A.
As specified in Section 16050.
B.
Provide the services of a manufacturer's authorized representative to:
1. Inspect installation before start-up.
2. Witness energization.
1.13
OWNER’S INSTRUCTIONS (NOT USED)
1.14
MAINTENANCE (NOT USED)
PART 2
2.01
PRODUCTS
MANUFACTURERS
A.
One of the following or equal:
1. Cooper Power Systems.
2. Asea Brown Boveri – ABB.
3. Virginia Transformer Corporation.
4. Niagra.
2.02
EXISTING PRODUCTS (NOT USED)
2.03
MATERIALS
A.
Windings:
1. Primary and secondary windings shall be high conductivity copper.
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B.
Insulating fluid:
1. Envirotemp FR3.
2. Insulating fluid shall meet or exceed the requirements of the appropriate ANSI
and ASTM fluid standards.
2.04
MANUFACTURED UNITS (NOT USED)
2.05
EQUIPMENT
A.
2.06
Ratings:
1. 3-phase, 60 hertz.
2. Self-cooled.
3. 65-degree Celsius temperature rise.
4. Primary voltage as indicated on the Drawings.
5. Primary connection as indicated on the Drawings.
6. Secondary voltage as indicated on the Drawings.
7. Secondary connection as indicated on the Drawings.
8. Kilovolt-ampere rating as indicated on the Drawings.
9. Basic impulse insulation level (BIL):
a. 1.2 kV Class: 30 kV.
b. 2.5 kV Class: 45 kV.
c. 5.0 kV Class: 75 kV.
d. 8.7 kV Class: 75 kV.
e. 15 kV Class: 95 kV.
f. 21 kV Class: 150 kV.
10. Sound levels:
a. In accordance with NEMA TR1.
b. Measurement procedure in accordance with IEEE C57.12.90.
11. Short-circuit capacity:
a. Mechanical short-circuit capability in accordance with ANSI C57.12.90.
b. Thermal short-circuit capability in accordance with ANSI C57-12.00.
12. Efficiency:
a. Transformers 2,500 kVA and less shall have an efficiency rating in
accordance with DOE 10 CFR Part 431.
COMPONENTS
A.
Core and coil:
1. Manufactured from burr-free, grain-oriented silicon steel laminations and
stacked to eliminate gaps in the corner joints.
2. Insulated with B-stage, epoxy coated, diamond pattern, insulating paper,
thermally cured under pressure to ensure proper bonding of conductor and
paper.
3. Clamped and braced to resist distortion caused by short-circuit stresses within
ratings or by shipping and handling and to prevent the shifting of core
laminations.
4. Vacuum processed to ensure maximum penetration of insulating fluid into the
coil insulation system:
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a.
b.
Energize the windings under vacuum to heat the coils and drive out
moisture.
While under a vacuum and the coils are heated, fill the tank with
preheated, filtered and degassed insulating fluid.
B.
Tank:
1. Welded using precision cut, cold-rolled steel plate.
2. Equipped with extra-heavy duty, welded-in-place lifting lugs and jacking pads.
a. Provide adequate cross-bracing of the base to allow skidding or rolling in
any direction.
3. Capable of withstanding a pressure of 7 pounds per square inch gauge without
permanent distortion, and 15 pounds per square inch gauge without rupturing.
4. Provide a pressure relief valve as a means to relieve pressure in excess of
pressure resulting from normal operation:
a. Cracking pressure: 10 pounds per square inch gauge within 2 psig.
b. Resealing pressure: 6 pounds per square inch gauge minimum.
c. Zero leakage from reseal pressure to -8 pounds per square inch gauge.
d. Flow at 15 pounds per square inch gauge: 35 scfm minimum.
C.
Bushings and terminals:
1. Primary bushings and terminals:
a. Provide 3 sidewall mounted electrical grade wet process porcelain
bushings.
b. Rated for full 3-phase duty.
2. Secondary bushings and terminals:
a. Manufacturers standard configuration for the secondary voltage and
transformer ratings indicated on the Drawings.
b. Located opposite of the high-voltage terminals.
3. Both primary and secondary bushings shall be externally removable without
the necessity of removing the tank cover.
4. Primary termination enclosure: bottom entry full length cabinet.
5. Secondary termination enclosure: throat for connection to busway or medium
voltage nonsegregated phase bus.
D.
De-energized tap changer:
1. Furnish with full capacity high-voltage taps:
a. Two 2-1/2 percent taps above and below rated voltage.
2. Labeled to indicate that the transformer must be de-energized before
operating the tap changer as required by IEEE C57.12.10.
3. Externally operated no load tap changer switch with snap action switch and
lever handle.
4. Padlocking provision in each tap position.
5. Position indication.
E.
Radiators:
1. Panel type welded directly to the tank.
2. Galvanized steel.
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2.07
ACCESSORIES
A.
Lightning arresters:
1. Provide lightning arresters on the primary and secondary side.
2. Minimum of one per phase.
3. Distribution class arrester.
4. Rating as indicated on the Drawings and/or consistent with the distribution
voltage.
B.
Tank ground pads:
1. 2 stainless steel pads, welded to the tank wall, with unpainted surfaces.
C.
Auxiliary cooling:
a. Provide all provisions for future cooling.
b. Supply all items that cannot be safely installed when the transformer is
engergized.
2. Provide control equipment including but not limited to:
a. Winding temperature actuated switch(es). Provide an indicator readable
from base level and electrical contacts for control of the auxiliary cooling
equipment, and one additional contact to alarm on high temperature.
b. Weatherproof cabinet for control equipment located on the transformer
approximately 4 feet 6 inches height between center of cabinet and base
level.
1) Furnish space heaters with thermostat.
c. Manually operated switch for choosing automatic or manual control.
d. Motor controllers, relays, terminal blocks, etc.
e. Conduit and wiring necessary to connect the control equipment into a
complete, functional system.
3. Power for the transformer auxiliary cooling equipment shall be 120 volts, single
phase, 60 hertz.
a. Supplied from the facility electrical system.
D.
Dial type thermometer:
1. Direct stem mounted in a closed well so that the thermometer can be removed
without breaking the tank seal:
a. The well shall be threaded into a fitting that is welded to the transformer
tank wall.
2. The thermometer shall have a slave hand that is moved by the indicating hand
to indicate maximum oil temperature. The slave hand shall be externally
resettable.
3. Alarm contacts.
E.
Liquid level gauge:
1. Dial-type liquid level gauge.
2. Alarm contacts.
F.
One-inch upper fill plug with filter press connection.
G.
One-inch drain/sampling valve.
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H.
Automatic pressure relief diaphragm:
1. With alarm contacts.
I.
Pressure/vacuum gauge:
1. Alarm contacts.
J.
Nameplates:
1. Provide nameplate as specified in Section 16075 and the following:
a. Provide complete nameplates identifying equipment, caution, voltage, etc.
b. Provide complete nameplates for both inside and outside of the
transformer terminal compartments.
c. Provide diagrammatic nameplate.
K.
Welded cover with bolted manhole.
L.
4 lifting lugs.
M.
Jacking facilities at each corner of base for jacking the complete transformer.
N.
Rapid pressure rise relay:
1. Alarm contacts.
O.
Bleeder valve.
P.
Fluid preservation system: Nitrogen blanket with bleeder and purge valve.
Q.
Touch-up paint.
R.
NEMA Type 3R control or terminal box.
S.
Winding temperature indicator.
T.
Wire all alarm contacts to a common terminal box or the forced air control box.
2.08
MIXES (NOT USED)
2.09
FABRICATION (NOT USED)
2.10
FINISHES
A.
In accordance with ANSI C57.12.28 or ANSI C57.12.29 for coastal regions including
the following performance requirements:
1. Salt spray test.
2. Crosshatch adhesion test.
3. Humidity test.
4. Impact test.
5. Oil resistance test.
6. Ultraviolet accelerated weathering test.
7. Abrasion resistance - taber abraser.
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B.
2.11
Procedure:
1. Clean with an alkaline cleaning agent to remove grease and oil.
2. Chemically bond iron phosphate coating to metal surface to assure coating
adhesion and retard corrosion.
3. Prime metal surface with an electrodeposited powder epoxy to provide a
barrier against moisture, salt, and corrosives.
4. Coat with an electrostatically applied, oven-cured polyester powder coat to
enhance abrasion and impact resistance.
5. Topcoat: Liquid polyurethane coating to seal and add ultraviolet protection.
6. Color: Manufacturer’s standard gray.
SOURCE QUALITY CONTROL (NOT USED)
PART 3
EXECUTION
3.01
EXAMINATION (NOT USED)
3.02
PREPARATION (NOT USED)
3.03
INSTALLATION
A.
As specified in Section 16050.
B.
Install the equipment in accordance with the accepted installation instructions and
anchorage details to meet the seismic and wind load requirements at the Project
site.
C.
General:
1. Furnish concrete pad and all lugs, bolts, anchors, sealants, and other
accessories needed to complete the installation of the transformer.
2. Assemble and install the transformer in the location and layout indicated on
the Drawings.
3. Perform Work in accordance with manufacturer’s and shop drawings.
4. Furnish components and equipment as required to complete the installation.
5. Replace any hardware lost or damaged during installation or handling.
6. Position the transformer so all required working space and clearance
requirements of the National Electrical Code and the local building authorities
are met.
3.04
ERECTION, INSTALLATION, APPLICATION, CONSTRUCTION (NOT USED)
3.05
REPAIR/RESTORATION (NOT USED)
3.06
RE-INSTALLATION (NOT USED)
3.07
COMMISSIONING AND PROCESS START-UP
A.
As specified in Section 01756.
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3.08
3.09
B.
Perform the following factory tests in accordance with IEEE C57.12.00 and in
accordance with IEEE C57.12.90:
1. No-load (85 degrees Celsius) losses at rated current. (Maximum allowable no
load losses: 10 percent.)
2. Total (85 degrees Celsius) losses at rated current. (Maximum allowable total
losses: 6 percent.)
3. Percent impedance (85 degrees Celsius) at rated current.
4. Excitation current (100 percent voltage) test.
5. Winding resistance measurement tests.
6. Ratio tests using all tap settings.
7. Polarity and phase relation tests.
8. Temperature test.
C.
Verification of performance:
1. Submit manufacturer's certified test results before shipping the transformer.
FIELD QUALITY CONTROL
A.
As specified in Section 16050.
B.
Provide the services of a qualified manufacturer’s representative to:
1. Install all transformer equipment shipped separately from the transformer.
2. Fill the transformer with insulating fluid.
3. Install the nitrogen blanket.
C.
Any and all other Work required to make the transformer ready for testing and
energization.
ADJUSTING
A.
Set the transformer taps as required to obtain nominal output voltage on the
secondary terminals.
3.10
CLEANING (NOT USED)
3.11
PROTECTION
A.
3.12
As specified in Section 16050.
SCHEDULES (NOT USED)
END OF SECTION
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