HomeMy WebLinkAboutAgenda Report - May 19, 1999 E-03CITY OF LODI COUNCIL COMMUNICATION
AGENDA TITLE: Approval of Specifications and Authorization to Advertise for Bids
for Polemount and Padmount Transformers for Fiscal Years 1999-2001
MEETING DATE: May 19, 1999
PREPARED BY: Electric Utility Director
RECOMMENDED ACTION: That the City Council approve the attached specifications, and authorize
the Electric Utility Department and Finance Department's Purchasing
Division to advertise for bids as necessary to meet the Electric Utility
Department's requirements for polemount and padmount transformers through
the Fiscal Year ending June 30, 2001.
BACKGROUND INFORMATION: On November 19, 1997, the City Council approved specifications for
polemount and padmount transformers, and authorized staff to advertise
for and receive bids for polemount and padmount transformers as needed
during the fiscal years 1997-99.
This action allowed staff to advertise for bids as requirements became known, and to receive and evaluate bids
without periodically seeking City Council approval to do so. Staff then brought to the Council recommendations to
award based on evaluated life -cycle costs as determined from each bid received.
The City Council's 1997 authorization also provided for "fast-track" guidelines, allowing staff to award only those
transformers needed for a particular "fast-track" project and, at the next regularly scheduled City Council meeting,
report to the Council the award and the basis for the award. (Since the 1997 authorization, no "fast-track" awards
have been necessary).
It is the recommendation of the Electric Utility Department and the Finance Department's Purchasing Division to
continue this procedure through the next two fiscal years. Under this procedure, the City Council would approve
specifications and authorize advertisement for bids one time, will retain the authority to award each bid as it is
received and evaluated, and will have the opportunity to review any necessary "fast-track" action taken by the
Department, at the next regularly scheduled Council meeting following the action.
Specifications for polemount and padmount transformers that apply to this proposal are attached.
FUNDING: Electric Utility Department's Operating Plan
, 411,1,1
AI . Vallow, Electric Utility Director
Prepared by Joel Harris, Purchasing Officer
APPROVED: �A 10F
H. Dixon Flynn — City nager
TRANSFMR 04115199
SPECIFICATIONS
POLEMOUNTED TRANSFORMERS - OIL FILLED
DIVISION 1 - GENERAL REQUIREMENTS
1-1 GENERAL
Electrical design and materials shall conform to the latest EEI-NEMA and ANSI Standards.
It is the intent of these specifications to describe equipment of the best design and
construction, for the service for which it is intended. Consequently, it shall be the City's
desire to award contracts to the bidder who has demonstrated high quality by having a
considerable number of transformers of bidder's manufacture in service on the lines of
electrical utilities over a period of years.
1-2 TESTS
Transformers shall receive at least the following tests in accordance with the applicable
ANSI and NEMA Standards:
(1)
Load and no-load loss
(5)
Applied and induced potential test
(2)
Exciting current
(6)
Impulse voltage test
(3)
Polarity check
(7)
Tank pressure test
(4)
1-3 SERVICE
Ratio check
The manufacturer shall own and operate a service shop in this vicinity, or the bidder may
submit evidence of a repair contract with an approved service shop in this vicinity, which
has been in effect for a period of at least one year. (For the purpose of this specification,
"vicinity" shall mean within a 200 -mile radius of the City of Lodi).
1-4 GUARANTEE
The Manufacturer shall guarantee all equipment delivered under these specifications
against any and all defects in material and/or workmanship for a period of at least one year
from date of acceptance. Manufacturer shall rectify all such defects by repair or
replacement at manufacturer's sole expense and shall assume responsibility for associated
shipping costs.
1-5 TECHNICAL INFORMATION
The following specifications shall be met:
Insulation level: 95 kv BIL (min).
2. Insulation rating: 65 0 C rise.
3. RainL All exterior surfaces shall be painted ANSI 70 gray, using a system
of coordinated and thoroughly tested materials and application techniques
that will assure long life. Special attention shall be given to welds, seams,
edges and rough spots.
4. Lifting Lugs: Lifting lugs shall be provided on the tank and shall be located
HAUSERWDMIMSPEMPOLEVRM. BK!
POLEMOUNT TRANSFORMERS - OIL -FILLED Sec. 1 Pg. 1
General Requirements
in such a way to avoid interference between lifting slings and any
attachments on the transformer and to avoid scratching the transformer
coating.
5. Tank: Tanks shall be tested at a pressure equal to or greater than the
maximum operating pressure and for a sufficient period of time to insure
that all welds are free from leaks. Tank construction shall be consistent with
good manufacturing and design practices prevalent in the transformer
industry, and together they should contribute to a high quality product.
6. Name lap te: Stainless steel or anodized aluminum nameplate shall be
securely attached to the transformer by means of metal screws, rivets, or
similar mechanical device(s). The letters and numbers shall be stamped or
engraved on the nameplate. The nameplate shall include the words, "Fluid
is less than one p.p.m. PCB," (refer to Section 1-7). The instruction
nameplate shall contain the information specified in Section 5.12 of ANSI
C57.12.00-1980.
7. Sound Level: The sound level shall be equal to or better than EEI-NEMA
Standards.
8. aka: Size of the transformer, including radiators (fins), shall not interfere
with installation or G.O. 95 requirements when banked together on cluster
bracket (Dixie Electric P-538 or approved equal).
9. Height and Weight: Height and weight of the transformer shall be as listed
below:
10. Pressure Relief Valve: The pressure relief valve shall be located a minimum
horizontal distance of five (5) inches from the vertical centerline of the
transformer hanger brackets.
Size (KVA)
Maximum Weight (lbs)
Maximum Height
(inches)
including bushings
15
400.
45
25
500
45
37.5
625
48
50
800
51
75
1,100
51
100
1,200
51
167
1,600
51
H'.%USER W DMIN\SP ECS%PQLEXFRM. SK!
POLEMOUNT TRANSFORMERS - OIL -FILLED Sec. 1 Pg. 2
General Requirements
1-6 LOSSES
Losses will be considered in the evaluation of this bid as follows:
No-load (core) loss @ $6.00/watt
Load (winding) loss @ $2.00/watt
The cost of losses will be added to the equipment price (bid price) F.O.B. Lodi, including
maximum escalation and tax, to determine the evaluated low bid of vendor otherwise
meeting these specifications. All bidders shall supply the following guaranteed loss data
for use in the evaluation, in addition to other data listed in the specifications:
1. No-load losses in watts at rated secondary voltage.
2. Load losses in watts at rated secondary voltage and rated load. The
standard reference temperature for load losses shall be 85 0 C.
3. Upon request, furnish certification/statement of the guaranteed loss
measurement error of the test equipment and measurement method to be
used, including the basis for determination of the accuracy of the test
equipment and measurement method.
The successful bidder shall supply a certified test report of actual losses of the unit(s) to be
supplied. The no-load and load losses for each group (type and size) of transformer(s) will
be averaged separately within their respective categories (no-load and load losses). If the
averaged tested no-load (core) and/or load(winding) losses of the transformer group
exceed the watt losses quoted in the proposal, the contract price shall be reduced by the
above amounts per watt of actual group averaged no-load and/or actual load loss in excess
of that quoted in the proposal. No-load loss penalties will be evaluated separately from load
loss penalties. No additional payment will be made to the manufacturer or bidder for actual
losses lower than the losses quoted in the proposal.
Certified test report of losses shall be submitted by the manufacturer prior to or at the time
of shipment of the transformer.
1-7 PCB CONTENT
Transformer fluid shall be guaranteed to contain less than one p.p.m. by weight (mg/kg)
polychlorinated biphenyls (PCB). Certified test report of PCB content shall be produced
upon request. The transformer nameplate shall include the words " Fluid is less than one
p.p.m. PCB."
H: %USERVI0MIMSPECSIP0LEXFRM.8K1
POLEMOUNT TRANSFORMERS - OIL -FILLED Sec. 2 Pg. 1
General Requirements (continued)
DIVISION 2 - SINGLE PHASE
2-1 GENERAL
In addition to that specified in Division 1 - General Requirements, transformers shall be
provided with the following:
1. High Voltage Bushings (Porcelain):
a. Quantity: Two
b. Bushing terminals to be clamp -type suitable for use with copper and
aluminum conductor.
2. Low Voltage Bushings:
a. Quantity: 277 -volt: Two
All others: Three
b. Shall be tank wall -mounted.
c. Bushing terminals: 100KVA and lower: Shall be clamp -type suitable
for use with copper and aluminum conductor.
Over 100KVA: Shall be NEMA4 pads (4 -hole)
3. Pressure relief valve: Qualitrol 202-030-01, or an approved equal.
4. Lifting lugs shall be welded to the tank.
5. Provide tank grounding pad and a visible tank -to -cover ground strap.
6. Hanger brackets, welded to the tank.
7. Hanger brackets shall permit bolting of transformer directly to pole.
8. Single phase, 60Hz, OISC.
2-2 RATINGS AND DESIGN
Transformers shall have the following ratings and design:
1. Distribution type, pole -bolted transformer.
2. 12,000 -Volt Delta primary.
3. Single phase
4. Without arresters and taps.
5. Conventional or CP type as specified on proposal form. CP transformers to
have one weak link (fuse) per primary bushing and a breaker on the
secondary side.
6. Secondary voltage to be as specified on the proposal form.
7. KVA rating to be as specified on the proposal form.
H:IUSERIADM I MSPECSIPOLEXF RM. SKI
PADMOUNTED TRANSFORMERS SECTION 4
DETAILED SPECIFICATIONS
4.000 GENERAL REQUIREMENTS
Electrical design and materials shall conform to the latest EEI-NEMA . and ANSI Standards for Oil -Filled
Equipment. It is the intent of these specifications to describe equipment of' the best design and construction,
for the service for which it is intended. Consequently, it shall be the City's desire to award contracts to the bidder
who has demonstrated high quality by having a considerable number of transformers of his manufacture in
service on the lines of electrical utilities over a period of years.
4.001 TESTS
Transformers shall receive at least the following tests in accordance with the applicable ANSI and NEMA
Standards:
1. Load and no-load loss 5. Applied and induced potential test
2. Exciting current 6. Impulse voltage test
3. Polarity Check 7. Tank pressure test
4. Ratio check
4.002 SERVICE
The manufacturer shall own and operate a service shop in this vicinity, or the bidder may submit evidence of a
repair contract with an approved service shop in this vicinity, which has been in effect for a period of at least one
year. (For the purpose of this specification, "vicinity" shall mean within a 200 -mile radius of the City of Lodi).
4.003 GUARANTEE
The Manufacturer shall guarantee all equipment delivered under these specifications against any and all defects
in material and/or workmanship for a period of at least one year from date of acceptance. Manufacturer shall
rectify all such defects by repair or replacement at manufacturer's sole expense and shall assume responsibility
for associated shipping costs.
4.004 TECHNICAL INFORMATION
Insulation level: 95 kv BIL (min).
0
2. Insulation rating: 65 C rise.
3. Ground Lugs: Two (2) ground lugs which accept a range of #4 to 1/0 AWG copper shall be
provided.
4. Paint: All exterior surfaces shall be painted Munsell 7GY3.29/1.5 (olive) green (or approved
equal), using a system of coordinated and thoroughly tested materials and application techniques
that will assure long life. Special attention shall be given to welds, seams, edges and rough spots.
Lifting Lugs: Lifting lugs shall be provided on the tank and shall be located in such a way to
avoid interference between lifting slings and any attachments on the transformer and to avoid
scratching the transformer coating.
6. Tanks: Tanks shall be tested at a pressure equal to or greater than the maximum operating
Spec # PDTR.11
4.1 FEB. 1998
PADMOUNTED TRANSFORMERS SECTION 4
DETAILED SPECIFICATIONS
pressure and for a sufficient period of time to insure that all welds are free from leaks. Tank and
radiator construction shall be consistent with good manufacturing and design practices prevalent
in the transformer industry, and together they should contribute to a high quality product.
7. Nameplates: Stainless steel or anodized aluminum nameplate shall be securely attached to the
transformer by means of metal screws, rivets or similar mechanical device(s). The letters and
numbers shall be stamped or engraved on the nameplate. The nameplate shall include the words,
"Fluid is less than one p.p.m. PCB, when manufactured", refer to Section 4.006. The instruction
nameplate shall contain the information specified in Section 5.12.2 of ANSI Standard C57.12.00-
1993.
8. Sound level: The sound level shall be equal to or better than EEI-NEMA Standards.
4.005 LOSSES
1. No-load (core): loss @ $6.00/watt
2. Load (winding): loss @ $2.00/watt
3. Evaluation: The cost of losses will be added to the equipment price (bid price) F.O.B. Lodi,
including maximum escalation and tax, to determine the evaluated low bid of vendor otherwise
meeting these specifications.
4. Guaranteed Loss Data: Bidders shall supply the following guaranteed loss data for use in the
evaluation, in addition to other data listed in the specifications:
A. No-load losses in watts at rated secondary voltage.
B. Load losses in watts at rated secondary voltage and rated load. The standard reference
temperature for load loss shall be 85°C.
C. Upon request, furnish certification/statement of the guaranteed loss measurement error
of the test equipment and measurement method to be used, including the basis for
determination of the accuracy of the test equipment and measurement method.
5. Certified Test Report: The successful bidder shall supply a certified test report of actual losses
of the unit(s) to be supplied. The no-load and load losses for each group (type and size) of
transformer(s) will be averaged separately within their respective categories (no-load and load
losses). If the averaged tested no-load (core) and/or load(winding) losses of the transformer
group exceed the watt losses quoted in the proposal, the contract price shall be reduced by the
above amounts per watt of actual group averaged no-load and/or actual load loss in excess of that
quoted in the proposal. No-load loss penalties will be evaluated separately from load loss
penalties. No additional payment will be made to the manufacturer or bidder for actual losses
lower than the losses quoted in the proposal. -
6. Certified Test Report of Losses: The manufacturer shall submit certified test report of losses
prior to or at the time of shipment of the transformer.
Spec # POTR.11
4.2 FEB. 1998
PADMOUNTED TRANSFORMERS SECTION 4
DETAILED SPECIFICATIONS
4.006 PCB CONTENT
Transformer fluid shall be guaranteed to contain less than one p.p.m.. by weight (mg/kg) polychlorinated
biphenyls (PCB). Certified test report of PCB content shall be produced upon request. The transformer
nameplate shall include the words, "Fluid is less than one p.p.m. PCB when manufactured".
4.007 DIMENSIONS
The overall dimensions of the units (height, width, depth - height only for single-phase units) will be considered
in the evaluation of this bid.
4.008 LABELING
The units are to be shipped without the Safety Labels per NEMA No. 260-1991. The City will affix its
personalized "Mr. Ouch" labels.
4.009 PADMOUNTED EQUIPMENT ENCLOSURES
A typical padmounted equipment enclosure consists of a surrounding case or housing for equipment to prevent
unauthorized access to protect people against accidental contact of energized parts and protect equipment
against weather hazards. The enclosure is mounted on a pad, above ground level, and may be ventilated to
permit circulation of air.
Entry into the enclosure shall be through either access door(s) or hood(s) as specified.
1. Structural Strength and Integrity Test: The structural strength and integrity test shall comply
with the latest NEMA and ANSI Standards for testing, design and enclosure security.
2. Construction shall be such that:
A. It prevents the entry of foreign objects, such as sticks, rods or wires.
B. It inhibits dismantling of the equipment.
C. It is free of areas which could provide access by forcing techniques.
D. Panels shall be fastened or hinged to resist disassembly, breakings or prying open from
the outside. Normal entry shall be possible only with the use of proper access tools.
Latches and other provisions for locking hinged panels shall be furnished.
E. There shall be no exposed screws, bolts or other fastening or hinging devices which are
externally removable (with the exception of pentahead bolts provided for extra security)
that would provide access to energized parts of the enclosure.
F. The transformer tank and enclosure shall be constructed of minimum 14 gauge steel. The
radiator to be constructed of minimum 18 gauge steel.
G. In addition to the regular locking provisions, all access doors shall be secured by a
recessed, captive, pentahead bolt which threads into a nut with a bind hole. A pentahead
bolt will be considered "captive" when the retention scheme will prevent it from being
Spec # PDTR.11
4.3 FEB. 1998
PADMOUNTED TRANSFORMERS SECTION 4
DETAILED SPECIFICATIONS
readily removed during normal operation of the door(s) or the hood(s). The recess is to
be nonrotating. The dimensions of the pentahead bolt and nonrotating recess shall comply
with Figure 1 of ANSI 057.12.28-1988. If all doors can be secured with a single bolt, one
bolt will be sufficient.
H. Each latched door(s) shall be latched at a minimum of three points. In addition to the
three-point latching, one pentahead bolt shall be coordinated with the latch and padlock
to prevent unlatching and insertion of the padlock into the hasp when and until the bolt
head is completely seated. Low profile cabinets, with access flip -up hoods, need only
padlock and pentahead bolt provisions, and shall be coordinated to prevent insertion of
the padlock into the hasp until the bolt head is completely seated.
The padlocking device shall be so designed and located as to resist prying or breaking off
by screwdrivers, wrecking bars, tire irons, single -socket lug wrenches, or other readily
accessible tools.
The edges of the access doors or hoods shall be formed to provide:
1) A close -fitting mating surface, with internal insertion- prevention lip that will be
shaped to prohibit entry or prying by screwdrivers, wrecking bars, tire irons, single -
socket lug wrenches, or other readily accessible tools.
2) Rigid panel which, in conjunction with a handle -linkage -latching mechanism with
three (or more) point latching, will resist bending in the event that sufficient force
is applied to distort the compartment or compartment door(s) and permit prying
access to the door edges.
K. Hinge pins shall be passivated AISI (American Institute of Steel Industries) Type 304
stainless steel, or approved equal.
L. If a handhole cover is exposed, it shall be secured against tampering by some means
accessible only from the inside of the compartment.
M. The bottom edge of the enclosure shall provide for flush mounting on a flat, rigid, mounting
surface to prevent wire entry into the compartment.
4.010 SINGLE PHASE UNITS
Transformer enclosures to be in conformance with Section 4.009 of this specification and be of the low -profile
design, maximum height for 75 KVA and below shall be 28", and for 100 KVA and above shall be 33". The
access door shall open to the top 1800 and be removable. The design shall be dead front, loop feed. Cables
shall enter and leave the transformer from below through openings in a pad. The front plate of the transformer
tank shall be constructed (reinforced) in such a manner that tank pressure does not cause any reduction in
clearances between the energized parts and grounded surfaces, i.e. deflection resulting in spades and bushings
moving toward the sides of the door.
The Bay -O -Net fuse shall be positioned in such a way that the fuse assembly can be inserted and locked in any
position without interfering with the closed door. Fastening of the oil drip plate and/or the fuse insertion
restrictive device with a "U" clamp around the molded outer tube assembly is not acceptable.
1. Bushing Heights: Primary and secondary bushing heights shall comply with the latest revisions
Spec # PDTR.11
4.4 FEB. 1998
PADMOUNTED TRANSFORMERS SECTION 4
DETAILED SPECIFICATIONS
of NEMA TR1 and ANSI C57.12.25-1990 Standards, Type 2 Arrangement Figure 2(b).
2. Standard Accessories: In addition to that specified in Section 4.000-4.009, transformers shall
be provided with the following:
A. Pressure relief valve, Qualitrol 202-030-01, or approved equal.
B. Low voltage terminal, 4 -hole in-line spade type, per ANSI C57.12.25, (all insulated), which
may be rotated to allow convenient connection of cables.
C. Oil filler and drain plugs.
D. Two (2) parking stands for high-voltage terminations, ANSI C 57.12.20, Figure 2b or two
separate parking stands (reference Figure 2a) and positioned,on the "C/L Cable Accessory
Parking Stand".
E. Two (2) loop feed, high-voltage universal bushing wells.
F. Bay -O -Net fuse assembly with molded outer tube, "Flapper' valve, Cooper Power Systems
catalog number4000361C99FV, is link, or approved equal; and oil drip plate below
fuse holder entrance. Fuse element not to be installed, but supplied in a bag -attached to
fuse holder handle. If the manufacturer desires to install the fuse an additional fuse of the
size and type specified shall be supplied in a bag attached to fuse holder handle.
3. Ratings and Designs:
A. Dead front, loop feed with two (2) universal busing wells.
B. Voltage: 12,000 Grd.Wye/6,930 volts primary to 240/120 volt secondary.
C. Single phase, 60Hz, OISC.
D. Transformers shall be provided with RTE dual sensing Bay -O -Net #4000358C or approved
equal fuse links in accordance with Table A.
E. KVA rating to be as specified on proposal form.
Spec * PDTR.11
4.5 FEB. 1998
PADMOUNTED TRANSFORMERS SECTION 4
DETAILED SPECIFICATIONS
4. Fuse Links:
Table A
Fuse Links (Single Phase
Transformer
Designation
Link
Isolation Link
KVA
Dual Sensing
Rating
3001861A ( )
50
4000358()
(Amp)
03M
10
C 05
8,
02M
15
C 05
8
02M
25
C 05
8
02M
37.5
C 08
15
03M
50
C 08
15
03M
75
C 10
25
05M
100
C 10
25
05M
167
C 12
50
06M
4.011 THREE PHASE UNITS
Transformer enclosure to be in conformance with Section 4.009 of this specification. Maximum transformer
height shall not exceed values listed in Table B below. High and low voltage compartments shall be separated,
the low voltage door shall be equipped with a locking handle, and in addition, the doors so arranged that access
to the high-voltage compartment can be gained only after opening the low -voltage door; doors shall be
removable. Cables shall enter and leave the compartment sections from below, through openings in a concrete
pad.
Fastening of the oil drip plate and/or the fuse insertion restrictive device with a "U" clamp around the molded outer
tube assembly is not acceptable.
TABLE B
TRANSFORMER HEIGHT
TRANSFORMER KVA
MAXIMUM HEIGHT
300 KVA and below 65"
500 KVA 75"
750 KVA and above 90"
Spec # PDTR.11
4.6 FEB. 1998
PADMOUNTED TRANSFORMERS SECTION 4
DETAILED SPECIFICATIONS
1. Bushing Location and Heights: Primary and secondary. bushing locations and heights shall
comply with the latest revisions of NEMA TR1 and ANSI C57-12.26-1993 Standards for Type A
primary and staggered low -voltage terminal arrangement.
2. Standard Accessories: In addition to that specified in Section 4.000-4.009, transformers shall
be provided with the following:
A. Pressure relief valve:, Qualitrol 202-030-01, or approved equal.
B. Four (4) low voltage bushing spades (4 hole for 500 KVA and below, 6 -hole for 750 KVA
and above, per ANSI C57.12.26).
C. Liquid level gauge, drain valve with sample valve and oil filler plug. Drain valve to be
located in the high-voltage compartment.
D. Parking stands for each high-voltage elbow terminator.
E. Universal bushing wells, for high-voltage terminations.
F. Bay -O -Net fuse assembly with molded outer tube, "Flapper' valve, Cooper Power Systems
catalog number 4000361C99FV, isolation link or approved equal; and oil drip plate below
fuse holder entrance. Fuse elements not to be installed, but to be supplied in a bag
attached to a fuse holder handle. If the manufacturer desires to install the fuses, additional
fuses (3) of the size and type specified shall be supplied in a bag attached to a fuse holder
handle.
3. Ratings and Design:
A. Dead front, radial feed design with three (3) universal bushing wells.
B. 12,000 volt Delta connected primary.
C. Three phase, 60 Hz, OISC.
D. 500 KVA and larger units only:
1) On -Off loadbreak, gang -operated, oil -immersed switch.
2) Switch handle with eye for operation with hot stick shall be located in high-voltage
compartment.
E. Transformers shall be provided with RTE dual sensing Bay -O -Net #4000358C or current
sensing #4000353C or approved equal fuse links in accordance with Table C.
F. Secondary voltage rating to be as specified on proposal form.
G. KVA ratings to be as specified on proposal form.
Spec # PDTR.11
4.7 FEB. 1998
PADMOUNTED TRANSFORMERS SECTION 4
DETAILED SPECIFICATIONS
4. Fuse Links:
TABLE C
Fuse Links / Three Phase
Transformer
Designation
Link
Isolation Link
KVA
Dual Sensing
Rating (Amp)
3001861A ( )
4000358 ()
75
C 05
8
02M
112.5
C 08
15
03M
150
C 08
15
03M
225
C 10
25
05M
300
C 10
25
05M
500
C 12
50
06M
750
119111111
1500
End Section 4
Current
Sensing
4000353()
C14
C16
C17
firelf
140
05M
05M
05M
Spec # PDTR.11
4.8 FEB. 1998