HomeMy WebLinkAboutRESPONSE - BID - 7282 LP TRANSFORMERS 25KVA & 100KVA PADMOUNTED SINGLE PHASEFIRM NAMEWa, bja4�1,+)Jq
CITY OF FORT COLLINS
BID PROPOSAL
BID NO. 7282
LP Transformers, 25kVA & 100kVA, Padmounted, Single Phase
BID DATE: 3:00 p.m. (Our clock) October 7, 2011
WE HEREBY ENTER OUR BID FOR THE CITY OF FORT COLLINS' REQUIREMENTS FOR LP
Transformers, 25kVA & 100kVA, Padmounted, Single Phase, PER THE BID INVITATION AND ANY
REFERENCED SPECIFICATIONS.
QUANTITY: DESCRIPTION:
30 Ea. TRANSFORMER, 25 KVA PAD -MOUNTED, ANSI TYPE 1, c
COMPARTMENTAL -TYPE, SINGLE PHASE DISTRIBUTION WITH
SEPARABLE INSULATED LOAD BREAK HIGH -VOLTAGE
CONNECTORS.
HIGH VOLTAGE RATING: 13200 GRDY/7620.
LOW VOLTAGE RATING: 240/120.
SERIAL NUMBER 130 TO BE IN ACCORDANCE WITH
SPECIFICATION #368-120-130, REVISION FF.
PLEASE COMPLETE THE ATTACHED EXCEL SPREAD SHEET FOR
BID SUBMITTAL.
IF YOU ELECT TO PASSWORD PROTECT YOUR BID, PLEASE
NOTE THAT PASSWORD BELOW.
'Any surcharges or additional costs shall be noted & included in bid submittal.
The transformers being bid meet or exceed the specifications. Yes No. If not,
please list exceptions, (specifying paragraph reference number) on a separate sheet of paper and
attach to your bid.
Escalation is , is not applicable for the transformers bid. If escalation applies, the
bidder shall indicate in his bid the specific items or materials subject to escalation, and shall give
the method and indices to be used in computing the amount thereof. Escalation occurring after the
quoted delivery date will not be paid unless delays are the result of actions by the city. Escalation
occurring after acceptance if purchaser exercises the option to delay shipment after manufacturing
is completed, will not be paid.
REV. SYM: FF
TABLE OF CONTENTS
PREVIOUS REVISION DESCRIPTIONS ON FILE..........................................................................................................................2
ISCOPE
2 APPLICABLE DOCUMENTS............................................................................................................................................................4
2.1 ANSI C57.12.00 - DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS, AND SHUNT REACTORS, GENERAL REQUIREMENTS
FOR.................................................................................. .............................................. ......................................................................... 4
2.2 ANSI C57.12.25 - PAD MOUNTED, COMPARTMENTAL -TYPE, SINGLE-PHASE, DISTRIBUTION TRANSFORMERS WITH SEPARABLE H-V
CONNECTORS, STANDARD REQUIREMENTS FOR..........!............................................................................................................................4
2.3 ANSI C57.12.28 - SWITCHGEAR AND TRANSFORMERS - PAD -MOUNTED EQUIPMENT -ENCLOSURE INTEGRITY...............................4
2.4 ANSI C57.12.70 - TERMINAL MARKINGS AND CONNECTIONS FOR DISTRIBUTION AND POWER TRANSFORMERS...............................4
2.5 ANSI C57.12.80 - TERMINOLOGY FOR POWER AND DISTRIBUTION TRANSFORMERS........................................................................4
2.6 ANSI C57.12.90 - DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS, AND SHUNT REACTORS, TEST CODE FOR.................4
2.7 IEEE C57.91 - GUIDE FOR LOADING MINERAL -OIL -IMMERSED OVERHEAD AND PAD -MOUNTED DISTRIBUTION TRANSFORMERS
RATED 500 KVA AND LESS WITH 650C OR 550C AVERAGE WINDING RISE.......................................................................................... 4
3 REQUIREMENTS................................................................................................................................................................................4
3.1 GENERAL REQUIREMENTS FOR DESIGN...............................................................................................................................4
3.2 SPECIFIC DESIGN REQUIREMENTS..........................................................................................................................................5
4 QUALITY ASSURANCE....................................................................................................................................................................9
4.1 GENERAL ...........................
4.2 TEST CONDITIONS...........
4.3 NOT USED ............ .................
4A TESTS ..................................
.............9
5 PREPARATION FOR DELIVERY....................................................................................................................................................9
6 DEFINITIONS AND ABBREVIATIONS........................................................................................................................................10
APPENDIX A -TRANSFORMER STOCK NUMBER CODING...................................................................................................I I
APPENDIX B-DIMENSIONAL DRAWINGS............................................................. ».................................................................. 12
PADDIMENSIONS ..............................................................................................................................................................................14
APPENDIX C - APPROVED MANUFACTURERS......................................................................................................................... 15
TRANSFORMER LOSS EVALUATION -AVERAGE LOSSES.................................................................................................... 16
INDIVIDUAL TRANSFORMER LOSS EVALUATION.................................................................................................................17
3
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SPECIFICATION FOR
PAD -MOUNTED COMPARTMENTAL -TYPE
SINGLE-PHASE DISTRIBUTION TRANSFORMERS
WITH SEPARABLE INSULATED LOAD BREAK HIGH -VOLTAGE CONNECTORS
1 SCOPE
This Specification establishes the minimum electrical requirements and mechanical features of single phase, 60 HZ,
mineral oil immersed, self -cooled, pad -mounted, compartmental -type distribution transformers rated 250 KVA and
smaller, high voltage 13,200 Grd Y/7620 volts, with separable insulated load break high voltage connectors. These
transformers are used for step down purposes from an underground primary cable supply.
This standard generally conforms with ANSI requirements for pad -mounted compartmental -type, self -cooled, single-
phase, distribution transformers, C57.12.25.
2 APPLICABLE DOCUMENTS
The following documents of the issue shown form a part of this Specification to the extent specified herein. In those
cases when the document is note dated, the latest issue in effect on the date of invitation for bids shall form a part of
this Specification.
2.1 ANSI C57.12.00 - Distribution, power, and regulating transformers, and shunt reactors, general requirements for.
2.2 ANSI C57.12.25 - Pad mounted, compartmental -type, single-phase, distribution transformers with separable H-V
connectors, standard requirements for.
2.3 ANSI C57.12.28 - Switchgear and Transformers - Pad -Mounted Equipment -Enclosure Integrity.
2.4 ANSI C57.12.70 - Terminal markings and connections for distribution and power transformers.
2.5 ANSI C57.12.80 - Terminology for power and distribution transformers.
2.6 ANSI C57.12.90 - Distribution, power, and regulating transformers, and shunt reactors, test code for.
2.7 IEEE C57.91 - Guide for Loading Mineral -Oil -Immersed Overhead and Pad -Mounted Distribution Transformers
Rated 500IMA and Less with 65°C or 55°C Average Winding Rise.
3 REQUIREMENTS
3.1 GENERAL REQUIREMENTS FOR DESIGN
3.1.1 BASIC DESIGN STANDARDS
Transformers purchased under these Specifications shall be new and, unless otherwise specified, meet
the requirements of the applicable ANSI Standards and the modifications and additions given in the
subsequent paragraphs. In case of conflict, the requirements of the following documents shall apply in
the priority shown:
a) This Specification
b) Applicable ANSI Standards
Approved manufacturers are listed in Appendix C.
4
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3.1.2 KILOVOLT -AMPERE TEMPERATURE RATINGS
Kilovolt -ampere ratings are continuous and are based on not exceeding either a 65°C average winding
temperature or an 80°C hot spot temperature rise. The temperature rise of the insulating oil shall not
exceed 65°C when measured near the top of the tank. The temperature rise is based on an altitude of
3,300 feet. The transformers shall be designed for overloads based on IEEE C57.91.
3.1.3 GENERAL CONSTRUCTION
3.1.3.1 The pad -mounted compartmental -type transformers shall consist of the transformer tank and high -and -low -
voltage cable terminating compartment constructed in accordance with ANSI C57.12.25 and ANSI C57.12.28.
The terminating compartment and tank shall be assembled as an integral unit, tamperproof and weatherproof for
mounting on a pad. There shall be no exposed screws, bolls, or other fastening devices which are externally
removable. The cover shall be welded construction. There shall be no opening through which foreign objects
such as sticks, rods, or wires might be inserted to contact live parts. Suitable means for padlocking the
compartment door(s) shall be provided.
3.1.3.2 The high- and low -voltage compartment shall be located side by side on one side of the transformer tank. When
facing the compartment, the low -voltage side shall be on the right.
3.1.3.3 Construction of the unit shall be such that it can be lifted, skidded, and slid into place on the mounting pad
without disturbing the entrance cables.
3.1.3.4An undercoating over the regular finish or an equivalent treatment shall be applied to all surfaces that are in
contact with the pad to minimize corrosion.
3.1.3.5 Minimum dimensions for Type 1 transformers shall be as shown in Figure 1, Appendix B. Minimum dimensions
for Type 2 transformers shall be as shown in Figure 2, Appendix B.
3.2 SPECIFIC DESIGN REQUIREMENTS
3.2.1 FUNCTIONAL DESCRIPTION
The transformer shall be a single'phase, pad mounted, loop feed -safe break, "dead -front" type for use on
a 13.8 kV grounded "Y" distribution system.
3.2.2 DESIGN AND CONSTRUCTION j
3.2.2.1 RATING
The transformer shall be rated as follows:
a) High Voltage 13,200 Grd. YI7620 volts
b) Low Voltage 2401120
i
c) Taps Two - 21/.% FC above and below normal
d) Polarity Additive
e) Capacity, Impedance values, and fusing for transformers in this specification shall conform to Table 1:
5
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Table 1 — Transformer Capacity. Impedance and Fuse Selection
Stock
kVA
Min. '
Max.
Bay-0-Net
Current Limiting Fuse(s)
Number
Capacity
Impedance
Impedance
Fuse
368-120-130
25
1.77%
2.16%
10 Amp
ELSP 354403OM61 M (30 A)
4000353C08
368-120-150
50
1.77%
2-16%
15 Amp
ELSP 3543640M81M(40 A)
4000353C08
368-120-155
50
1.77%
2.16%
15 Amp
ELSP 3543040M61M (40 A)
4000353C08
368-120-170
100
1.95%
238%
25 Amp
ELSP 3543080M71 M(80 A)
4000353C10
368-120-180
167
2.28%
2.79%
40 Amp
ELSP 3543125M71 M(125 A)
4000353C72
368-120-190
250
5.75%
6.61%
65 Amp
ELSP 3543125M71M(125 A)
4000353C74
'The BAY-0-NET fuse shall be located in the high voltage side of the compartment.
3.2.2.2 INSULATION LEVEL
3.2.2.2.1 The basic impulse insulation level (BIL) of completely assembled high -voltage and low -voltage terminals
shall be 95 kV and 30 kV respectively.
3.2.2.2.2 Dielectric test levels shall be in accordance with the distribution levels in Section 4 of ANSI C57.12.00.
3.2.2.3 HIGH -VOLTAGE TAPS
A no-load tap changer with external operating handle shall provide two - 2%% full capacity taps above and
below normal. The tap changer operating handle shall be located within the high -voltage terminal side of the
terminal compartment.
3.2.2.4 NOT USED
3.2.2.5 BUSHING WELLS AND TERMINALS
3.2.2.5.1 The number, location, and arrangement of bushing wells, terminals and parking stands shall be as
shown in Fig. 1 or Fig. 2 in Appendix B. All low -voltage bushings and high -voltage wells shall be
externally clamped and shall have leads of sufficient length to allow them to be changed without
removing the cover. Welded bushings and wells are expressly prohibited.
3.2.2.6.2 High -voltage terminals shall be universal flowerpot bushing wells in accordance wlth Figure 3 of
ANSI/IEEE 385-1985. Two wells shall be provided and shall be connected in a feed -through
configuration. Loadbreak bushing inserts in accordance with Figure 5 of ANSI/IEEE 386-1985 will be
owner furnished.
3.2.2.5.3 Low-vohage line and neutral terminals shall be sized as shown in Table 2 in accordance with ANSI
C57.12.25. Bushing arrangement and spacing shall be shown in Fig. 1 or Fig. 2 in Appendix B.
Table 2 — Low Voltame Terminal Sizes
Stock Number.
kVA Capacity
Low volts a Terminal Size
368-120-130
25
5/8" x 11" UNC-2A copper studs
368-120-150
50
518" x 11" UNC-2A copper studs
368-120-155
50
5/8" x 11" UNC-2A copper studs
368-120-170
100
1"x 14" UNC-2A copper studs
368-120-180
167
1" x 14" UNC - 2A copper studs
368-120-190
250
1 %" x 12 UNF - 2A copper studs.
3.2.2.5.4 The low -voltage Xz bushing shall be a fully insulated bushing. A ground pad shall be provided on the
outer surface of the tank'and an external removable cooper ground strap shall be provided and
connected between the lbw -voltage Xz bushing and the ground pad.
3.2.2.5.5 The high -voltage neutral shall be securely grounded internally.
6
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3.2.2.6 ACCESSORY CABINET
3.2.2.6.1 The accessory cabinet shall consist of a compartment containing high- and low -voltage bushings
constructed in accordance with applicable ANSI specifications, including ANSI C57.12.28. Dimensions
shall be in accordance with Fig. 1 of this specification.
3.2.2.6.2 Cabinet doors shall be hinged, removable, lockable, and of sufficient sae to provide adequate working
space when removed or open. Unlocking the padlock shall permit access to both the high- and low -
voltage terminations. Stainless steel hinge pins shall be provided.
3.2.2.7ACCESSORY EQUIPMENT
Accessory equipment shall be provided in accordance with the following details:
3.2.2.7.1 Deleted
3.2.2.7.2 The transformer base shall be arranged for rolling in two directions: Parallel to and at right angles to the
center line of the high -voltage bushings.
3.2.2.7.3 Lifting lugs or bosses for screw -in lift bolts shall be provided. These lugs or bosses shall be adequate
strength and size and arranged on the tank to provide a suitable balanced lift for the completely
assembled unit.
3.2.2.7.4 The base of the assembly shall be provided with suitable means for mounting the unit on the pad. An
internal flange shall be provided at the base of the accessory compartment to provide means for
mounting the unit on the pad. (Fig. land Figure 2, Appendix B).
3.2.2.7.5 Terminal designations are shown in Figure 1 and Figure 2, Appendix B. The identification of terminal
connections shall be shown on the instruction nameplate. Instruction nameplate shall be located in the
low -voltage side and shall be readable with cables in place. Where the nameplate is mounted on a
removable part, the manufacturer's name and transformer serial number shall be permanently affixed to
a non -removable part.
Instruction nameplate shall contain the information specified in 5.12 of ANSI C57.12.00-1987, Nameplate
A. Also, on the nameplate, or label affixed near it, the manufacturer shall indicate that the dielectric fluid
contains less than 1 ppm; PCB.
3.2.2.7.6 A suitable marking inside of the tank shall indicate the correct oil level at 25°C
3.2.2.7.7 An automatic pressure relief device shall be located within the compartment. This device shall meet the
following requirements:
I
• Y4" NPT or larger male Inlet Port.
• Exposed parts of weather and corrosion resistant materials.
• Non -deteriorating gasket and o-ring material.
• Manual pull ring able to withstand 25 pound force minimum.
• Body able to withstand 100 pound shear force minimum.
• Bug shield.
• Cracking pressure of 10 t 2 psig.
• Resealing pressure of 8 t 2 psig.
• Zero leak rate from 8 t 2 psig to -8 psig.
• Minimum flow rate of 35 SCFM at 15 psig.
3.2.2.7.8 An RTE BAY-O-NET current sensing fuse and internally mounted partial range current limiting fuse shall
be furnished as shown in Table 1.
3.2.2.8O1L PRESERVATION
Transformers shall be of sealed -tank construction. Sealed -tank construction is that which seals the interior
of the tank from the atmosphere, and in which the gas plus the oil volume remains constant. The
transformer will remain effectively sealed for a top -oil temperature range of -5°C to 105°C.
3.2.2.9TANKS
The tank shall be domed or sloped to shed water. The tank shall be of sufficient strength to support a
minimum of 500 lbs. vertical load. Construction of the tank shall be in accordance with ANSI C57.12.25-
1981, paragraphs 6.1 and 6.6.
7
368-120
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3.2.2.9.1 The cover shall be welded construction.
3.2.2.9.2 Tank grounding provision shall consist of two steel pads, each with Y2 inch - 13 NC tapped hole, 7/16
inch deep.
3.2.2.9.3 These ground pads shall be welded on the transformer base or on the tank wall near the base, one in
the high -voltage side and one in the low -voltage side. In cases where the transformer tank and
compartments are separate, provisions shall be made for electrically connecting them.
3.2.2.9.4 Locking bolts shall be pentahead.
3.2.2.10 COMPONENTS FOR LOOPED PRIMARY
The minimum current -carrying capability of components for the looped primary cable system shall be 200
amperes (continuous) and 10,000 amperes symmetrical (momentary).
3.2.2.11 AUDIBLE SOUND LEVEL
The audible sound level shall be in accordance with NEMA Standard TR1-1980.
3.2.2.12 BASE PLAN
The base plan of a completely assembled unit shall be such that it can be installed on a pad of the
dimensions shown in Fig. 1 B.
3.2.2.13 PAINT
EEI "Finishing Guidelines" specification shall apply. Finish coat shall be Munsell Green, glossy.
3.2.2.14 LOSSES
The total losses of transformer shall be the sum of the excitation losses and the load losses (I=R losses)
Load loss tests shall be performed and reported on all units regardless of whether or not a record of such
tests is available on duplicate units. Loss evaluations and loss costs will be based on the values shown in
the "Special Conditions and Supplemental Instruction to Bidders." Transformers will be evaluated on
excitation losses and I'R losses at the specified rates. If tested losses exceed quote losses but are within
the tolerances of Table 18, ANSI C57.12.00-1987, the additional cost incurred from the differential of losses
will be calculated using the following equation and the above specified rates and will be deducted from the
original Purchase Order or back charged to the manufacturer. In Table 18 and the following equation "Units"
shall mean 'Transformers of the same size and design on one order ".
Excess loss $ _ [No. of units] [(No Load Loss Evaluation $) (Avg. No Load Losses - Quoted No Load
Losses) + (Load Loss Evaluation $) (Avg. Load Losses - Quoted Load Losses)]. If this equation results in a
negative number, no credit will be given the Supplier.
If any unit or units exceed the tolerances of Table 18, ANSI C57.12.00-1987, that unit or units shall not be
shipped without express permission from the City. If accepted, the deduction for excess losses will be based
on the following equation: Excess loss $ _ (No Load Loss Evaluation $) (No Load Losses - Quoted No Load
Losses) But Not Less Than Zero + (Load Loss Evaluation $) (Load Losses - Quoted Losses) But Not Less
Than Zero.
3.2.2.15 SAFETY LABELS
NEMA 1260 Safety Labels shall not be applied by the manufacturer: Purchaser will apply customer warning
labels after delivery.
8
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4 QUALITY ASSURANCE
4.1 GENERAL
4.1.1 RESPONSIBILITY FOR INSPECTION
Unless otherwise specified, the vendor is responsible for the performance of all inspection requirements
as specified herein. Except as otherwise specified, the vendor may utilize his own facilities or any
commercial laboratory acceptable to the City of Fort Collins. The City reserves the right to perform or
witness any of the inspections set forth in this Specification where such inspections are deemed
necessary.
4.12 TEST REPORT
The manufacturer shall furnish to the purchaser certified copies of the results of loss tests prior to
payment. Copies shall be sent to the Design Section as well as with the invoice. Unsigned copies are
not acceptable even if accompanied by a signed cover letter. The Quality Control Manager shall review
and sign each test report.
4.2 TEST CONDITIONS
Unless otherwise specified, testing required by Section 4.4 shall be conducted under the following
conditions:
4.2.1 REFERENCE TEMPERATURE
i
The reference temperature to which losses, impedance, regulation, and efficiency are corrected shall be
85°C.
4.2.2 TOLERANCE ON IMPEDANCE VOLTAGE
Impedance on completed units shall fall within the range specified herein.
4.2.3 TOLERANCE ON IMPEDANCE VOLTAGE ON A TAP
The percent departure of tested impedance voltage on any tap from tested impedance voltage at rated
voltage shall not be greater than the total tap voltage range expressed as a percentage of the rated
voltage.
4.3 Not used.
4.4 TESTS
The kinds of tests to be performed and the test procedures shall be as specified in ANSI C57.12.20, ANSI
C57.12.00, and C57.12.90 except as specified herein.
4.4.1 DIELECTRIC TESTS
No applied potential test shall be made. The induced -potential test shall be made by applying between
the terminals of one winding a voltage which will develop from high -voltage line terminals to ground a
voltage of 1000 volts plus 3.46 times the rated transformer winding voltage.
4.4.2 IMPEDANCE AND LOAD -LOSS TESTS
Impedance and load -loss tests shall be made on each unit and may not be omitted even if a record of
such tests made on a duplicate unit is available.
5 PREPARATION FOR DELIVERY
Transformers shall be prefilled with the appropriate amount of transformer oil and shall be shipped by open -bed truck.
Units shall be packaged in such a way as to provide for ease of handling and to protect units from shipping damage.
9
368-120
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Units shall be packaged on four-way universal pallets with 34 inches minimum opening and loaded on the truck for
side removal. The Supplier shall give 24 hour notice prior to delivery for any shipments where an individual
transformer weighs over 5,000 pounds. In addition to these requirements, the Supplier shall comply with any
additional requirements or modifications shown on the purchase order and/or supplemental instructions.
6 DEFINITIONS AND ABBREVIATIONS
Vendor or Supplier - The manufacturer and/or manufacturer's agent supplying or quoting on the specified article.
Article, Unit, Assembly - All refer to the equipment defined by this Specification.
• DC or d.c. - Direct Current.
• AC or a.c. - Alternating Current.
• •C - Degree Celsius (Centigrade)
• °F - Degree Fahrenheit
• kV - 1000 volts.
• CPS or Hz - Cycles per second.
• psig - Pounds per square inch gauge.
• Vory- Volts.
• KVA -1000 Volt-amperes.
10
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I APPENDIX A— Transformer Stock Number Coding
Below are examples that demonstrate the coding method used by City of Fort Collins to establish
transformer stock numbers.
I. SINGLE PHASE
Example #1
Transformer
Single Phase
00 = 13.2Y/7620 &
7620/13.2Y x
2400/4160 outside
pole
05 = 13.2Y7620 ESNA pole
20 = 13.2Y/7620 ESNA pad
II. THREE PHASE
Example #2
Transformer
3 Phase
Pad
368 -1
006 = 75
015 = 150
030 = 300
050 = 500
Other
KVA
0=5 5=50
1=10 6=75
2=15 7=100
3=25 8=167
4=37.5 9=250
1 = single voltage
2 = dual voltage
075 = 750
100 = 1000
150 = 1500
• All suffices indicate 208Y/120 sec.
• For 480Y/277 sec., add 1 to XYZ
lie. 007 would indicate a 75kVA with
480Y1277 sec.)
11
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APPENDIX B — DIMENSIONAL DRAWINGS
40" MAX
2B' MIN
4A' Sh' SV S t"
4t1I MIN MIN MIN I MIN MIN MIN MIN MIN 4lL) MIN
i
I
H1A "HIB "X3 "X1
7'11' CABLE AMESSORY 32'mox
x z PARKING STAND
X2
CROUND PAD - 18'12"
O� \O
MAX.
IM.
KV
A
A
1N OUT
RADIATORS
N1TH
RADIATORS
25 k 50--
100
42'
167
250
• MINIMUM OPENING
IN BOTTOM OF COMPARTMENT
FOR CABLE ENTRANCE
Figure 1 — Type 1 Transformer Dimensions and bushing Designations (not to scale)
12
368-120
20 Ea. TRANSFORMER, 100 kVA PAD -MOUNTED COMPARTMENTAL
TYPE, SINGLE PHASE DISTRIBUTION WITH SEPARABLE�� �oU
INSULATED LOAD BREAK HIGH VOLTAGE CONNECTORS.
HIGH VOLTAGE RATING: 13200 GRDY/7620.
LOW VOLTAGE RATING: 240/120.
SERIAL NUMBER 170 TO BE IN ACCORDANCE
WITH SPECIFICATION #368-120-170, REVISION FF
PLEASE COMPLETE THE ATTACHED EXCEL SPREAD SHEET FOR
BID SUBMITTAL.
IF YOU ELECT TO PASSWORD PROTECT YOUR BID, PLEASE
NOTE THAT PASSWORD BELOW.
*Any surcharges or additional costs shall be noted & included in bid submittal.
The transformers being bid meet or exceed the specifications. Yes No. If not,
please list exceptions, (specifying paragraph reference number) on a separate sheet of paper and
attach to your bid.
Escalation is , is not applicable for the transformers bid. If escalation applies, the
bidder shall indicate in his bid t t specific items or materials subject to escalation, and shall give
the method and indices to be used in computing the amount thereof. Escalation occurring after the
quoted delivery date will not be paid unless delays are the result of actions by the city. Escalation
occurring after acceptance if purchaser exercises the option to delay shipment after manufacturing
is completed, will not be paid.
Delivery may be a consideration of bid award.
For purposes of warranty and service ONLY approved manufacturers or distributors authorized by an
approved manufacturer to serve the Fort Collins area may bid.
The City of Fort Collins reserves the right to split the bid in whatever percentages are most
advantageous to the City.
Future orders of LP Transformers 25kVA & 100kVA, Padmounted, Single Phase may be
authorized, at the option of the City, from this bid for a period of five years after date of award.
Satisfactory pricing and delivery is required for future orders based on this bid.
I
INSIDE
IZt°-2
TANK SURFACE
DETAIL A
CABLE ACCESSORY
PARKING STAND
I
i
BOTTOM
FLANGE
4MIN
121 MAX
HIGH -VOLTAGE CONNECTORS
F CABLE ACCESSORY y
REV. SYM: FF
ONT
2.1
25� 2
2 MIN 3 2 MIN
= x3G
SEE CABLE ACCESSORY
PARKING STAND E
DETAIL A SEE DETAIL A 6 291/2 L 1 k
12 I° MIA 8 (NOTE 8)
26MIN
2
BSA LE
GROUNDPAD
4I
�I
8=1
BASE
PLANE
Z
4
Figure 2 — Type 2 Transformer Dimensions and bushing Designations (not to scale)
13
368-120
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Pad Dimensions
This drawing is not intended to dictate requirements for items purchased under Specification 368-120 but is included as
an aid to those users desiring a minimum of pad designs for the transformers covered by Specification 368-120.
The dimensions in inches of Figure 3 will fit the minimum compartments on transformers covered by this Specification as
well as the maximum transformer envelope.
48'
None M POE MeleM!
1. Concrete.. Ine3,M pal mMarmn
2. MlWIYnI coarse agjle" eW l la NNb.
Specs laqutiemenb W pad and primary switr mg calMettehi ga^^aM
as 9'%12'. Faclons to Ea wngdsred N buthpMaPdNGude-
t. AoRM1,111ty- The weasWmrr pad shai be toostaMaW
lane Doom hl/da aqulpped for Me Installation and I al M
Heavy atnshonrra. Such accessibility Mai not require
Matti on adjacent popery.
2. paMnsy M Bananas. Was. Banana, 011WorC at;s -
In aEdltldn W the tleaapaa requlad for Installation and
amovY, Me mNrlum Waana M Qaed of tar Oenafomrr,d
atoll M sight (8) lees and Me Mndreum Waance eom 0
timer sines a"i M too (2) het. II Me buiding Me an
ovadang, Waance W Me edge of pro haasksn Rd Wg
as meavuad IwKmab/ awn na wr/ edge M Me ova ,,
Tlanskrmea Maugh 3Og WA may M Mideast under Me
an a llo ng E Me v Ncal deaana bsMaen Me ped vW the
overhang is at Most 25 Met and Me IDci Is accessible W
Iles boom iNoea.
]. codes and 5landaNa - In addlam to Me Roves, Me
Installation atoll coMolm to in. Natant ElscVlc Code and
fedi state alto Oy cd]ne and Mandelda.
Figure 3 — Pad Dimensions
T3
a'
I,
UNG
_1
_ TY
a3 REBPR
LENGTH ANO`M DTX
14
368-120
REV. SYM: FF
I
APPENDIX C — Approved Manufacturers
Transformers purchased under this Specification shall be of the make shown below. Manufacturers not listed below may
submit written proposals demonstrating compliance with these Specifications for consideration of addition to the accepted
manufacturers list prior to the next request for bids. In addition to inclusion on the list below, manufacturer's equipment
must also satisfy all requirements of this Specification to be acceptable.
MANUFACTURER SERIAL NO.
f�i
All
Cooper Power Systems All
General Electric All
Howard Industries All
The manufacturers in the following list have been conditionally approved and may bid as an alternate. The definition and
intent of "Conditional Approval' of a manufacturer is to allow the City to gain some experience with the manufacturer's
product. Should a conditionally approved manufacturer be the evaluated low bidder, the City reserves the right to award
all, part, or none of the order to them, dependant upon the current needs of the City for that item or items.
15
368-120
REV. SYM: FF
TRANSFORMER LOSS EVALUATION - AVERAGE LOSSES
City Order No. S/N
Manufacturer Invoice No.
KVA/UNt
LINE
DESCRIPTION AMOUNT
(1)
No. of units
(2)
Average core losses
(3)
Quoted core losses
(4)
Excess average core losses:
line (2) less IIme (3)
(5)
Penal ttyy for excess average core losses:
line (1) x line (4) x $
(6)
Average copper losses
(7)
Quoted copper losses
(8)
Excess average coppper losses:
line less line (�)
(9)
I(66)
Pena
fine 8j z average copper losses:
(10)
Penalty to be assessed manufacturer.
line (5) plus line (9) but not less
than zero
Date Prepared By:
Design Engineering
NOTE: If any unit(s) exceeds the loss tolerances of ANSI C57.12.00, Light & Power will either reject it,
include it on these averages, or calculate losses using the Individual Transformer Losses Evaluation
Form, whichever is most favorable to Light and Power.
16
368-120
i
INDIVIDUAL TRANSFORMER LOSS EVALUATION
City Order No.
S/N
Manufacturer
Invoice No.
KVA/Unit
LINE
DESCRIPTION AMOUNT
(1)
Tested core losses
(2)
Quoted core losses
(3)
Excess core losses
line (1) less line (2) but not less
than zero
(4) Percent difference %
line (3) ❑ line (2) x 100
(5) Tested total losses
(6) Quoted total losses
(7) Excess total losses
line (5) less line (6) but not less
than zero
(8) Percent difference j %
line (7) D line (6)_x 100
I
(9) Tested copper losses
(10) Quoted copper losses
It 1) Excess copper losses
(12) line (9) less line (10) but not less
than zero
(12) Penalty for excess core losses
line (3) x $
(13) Penalty for excess copper losses
line (11) x $
(14) Penalty to be assessed manufacturer
line (12) plus line It 3)
Date Prepared By:
Design Engineering
REV. SYM: FF
17
368-120
Issued: 8/17/72
Revised: 1/21/94
Special Conditions and
Supplemental Instructions to Bidders
Applicable to
Specification 368-120
A. Data to be Supplied with Bidder's Proposal
The following data shall be supplied with the bidder's proposal in addition to that
information required by the "Invitation to Bid" and the "Purchase Requisition".
1. A typical list of users of 1 phase padmounted distribution class
transformers manufactured by the bidder during the past five years.
2. A typical drawing of the transformers showing that they will meet the
critical dimensions required by the Specification.
3. Impedance volts in % at full load, high voltage to low voltage at 850C.
4. No load and total losses at 850C.
5. Delivery in weeks.
6. A statement indicating compliance with our Specification without
exception or a detailed list of exceptions.
7. Escalation is _. is not _applicable for the transformers bid. If escalation
applies, the Bidder shall indicate in his bid the specific items or materials
subject to escalation, and shall give the method and indices to be used in
computing the amount thereof. Escalation occurring after the quoted
delivery date will not be paid unless delays are the result of actions by the
City. Escalation occurring after acceptance, if Purchaser exercises the
option to delay shipment after manufacturing is completed, will not be
paid.
If the above information and compliance statement are not supplied, the proposal will not
be evaluated.
An alternate bid for the total order may be submitted in addition to the unit bids.
B. Loss Evaluations
Loss penalties and loss evaluations will be based on the
following values:
1. No load or excitation losses at $3.90/watt.
1
2. Load losses at $1.50/watt.
C. Shipping Terms
Ship F.O.B. point of destination, freight prepaid.
D. Terms of Payment
If escalation applies, the City of Fort Collins shall not be billed for
escalation occurring after the promised delivery date.
2. Test reports shall accompany the invoice. If test reports do not accompany the
invoice, late payment penalty charges incurred due to delays in obtaining the test
reports will not be paid. Certified copies of test reports shall be sent to the Design
Section, Fort Collins Light and Power Utility.
3. Loss penalty credits and escalation charges shall be itemized on the
invoice.
SUPPLEMENTAL INSTRUCTIONS
Prices quoted must remain firm for a 30 day period after the opening date.
Freight terms: F.O.B. destination freight prepaid. All freight charges must be included in pricing
submitted on proposal and not entered as separate pricing.
Any discount allowed by Vendor for prompt payment, etc. must be reflected in quoted figure, and
not entered as separate pricing.
The City reserves the right to accept or reject any and all quotes.
Bidder not responding to the services requested in this bid shall be removed from our automated
listing for: Not Applicable
Any questions or inquiries regarding this bid should be directed to:
Opal F. Dick, CPPO, Senior Buyer
(970) 221-6778
t s� Ate
SIGNATURE AND TITLE: TYPED OR PRI
—Di —�5w I
EMAIL:
NAME AND TITLE
-?--7 r-x�
AN ®D go
P%®®®®
Neg #: 11Q1369582 CITY OF FORT COLLINS -UTILITIES/ Wesco Distribution Inc
/ FTCollins7282
Item Alt Qty Description Price Each USD
10 30 25 KVA Liquid Filled Padmounted Transformer r/
DTR 2401, Jefferson City, USA (9AAE300179), PDC: 9AAC30400441, DTAN-L1S135 - /oC)(-
20 20
100 KVA Liquid Filled Padmounted Transformer � dr� 2 /a U�
DTR 2401, Jefferson City, USA (9AAE300179), PDC: 9AAC30400441, DTAN-LlS135 V
ABB Page 2 of 11 - 10/42011
NOTICE— 7hus document may contain confidential and privileged information for the sole use ofthe intended recipient. lfyou are not the inended recipient you mayner review, -copy
-or distribute this message. Any review or distrih ition by others is strictly prohibited !f you are not the intended recipient. please contact the sender immediatelyand delete all copies.
CITY OF FORT COLLINS - UTILITIES / Wesco Distribution Inc
Neg #: 11 Q1 369582 / FTCollins7282
ITEM
QTY
kVA
EACH (USD)
NIL
I LL
TL
%Z
Shipment
10
30
25
59 @_85
1 234 @ 85
293
1.96
10-12
Weeks
ITEM Customer
Stock #
10 368-120-130
Quoted loss values are guaranteed average values.
Description:
Type
Fluid
Core
Phase
Frequency
Average Winding Rise
Ambient Temperature
High Voltage
High Voltage Taps
High Voltage BIL
Low Voltage
Low Voltage BIL
Feed Configuration
Color
Customer Specification
Liquid -Filled MTR Maxi -Pak Padmounted Transformer
Mineral Oil
Grain Oriented Steel
1 Phase
60 Hz
65 °C
30 °C
13200GrdY/7620
+2 -2 2.5%
95kV BIL
240/120
30kV BIL
Loop feed
Green (Munsell 7GY 3.29/1.5)
368-120 Rev FF. 7/21/2004
Features (included in price);
TANK & CABINET
• 14" deep cabinet (13.25" deep sill)
BUSHINGS
• Bushing wells x 2
• Stud secondary x 3
FUSES
• Partial range d fuse in series with bayonet
MONITORING
• Pressure relief valve
OTHER
• DOE Efficiency (2010)
Scoop drip shield
ABB Page 3 or I t
10/42011
NOTICE- Mis document may contain confidential and privileged information for the sale use ofihe intended recipient !flnu are not the inteadedrectpient you may not review, copy
or distribute this message. Any renew or distribution by others is strictly prohibited. /fyou are not the intended recipient, please contact the sender immediately and delete all copies.
CITY OF FORT COLLINS - UTILITIES / Wesco Distribution Inc
Neg #: 11 Q 1369582
/ FTCollins7282
20 1 20 1 100
ITEM
Customer
Stock #
20
368-120-170
Quoted loss values are guaranteed average values.
Description:
1186@85I 689@85
875 2.15 I 10-12
Type
Liquid -Filled MTR Maxi -Pak Padmounted Transformer
Fluid
. Mineral Oil
Core
. Grain Oriented Steel
Phase
1 Phase
Frequency
. 60 Hz
Average Winding Rise _
65 °C
Ambient Temperature
. 30 °C
High Voltage
13200GrdY/7620
High Voltage Taps
: +2 -2 2.5%
High Voltage BIL
: 95kV BIL
Low Voltage
: 240/120
Low Voltage BIL
: 30kV BIL'
Feed Configuration .
Loop feed
Color :
Green (Munsell 7GY 3.29/1.5)
Customer Specification :
368-120 Rev FF, 7/21/2004
Features (included in price):
TANK & CABINET
• 14" deep cabinet (13.25" deep sill)
BUSHINGS
• Bushing wells x 2
• Stud secondary x 3
FUSES
• Partial range G fuse in series with bayonet
• Bayonet mounted expulsion fuse + isolation link
MONITORING
• Pressure relief valve
OTHER
• DOE Efficiency (2010)
• Scoop drip shield
Page 4 of I I
10/4/2011
NOTICE. -This document may contain corfdentialandprivilegedinformationfor the.sole use ofthe inleadedrecipient. /fyou are not the intendedrecipienlyou may not review,copy
or distribute this message. Any review ordigribudon by others is strictly prahnined. Ifyvu are not the intended recipient, please contact The sender immediately and delete all copies.
Ruchase CNdef Timm and Conditions
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THE CITY OF FORT COLLINS
I
Light and Power Department
P.O. Box 580
Fort Collins, CO 80522
SPECIFICATION NO: 368-120
TITLE: PAD -MOUNTED COMPARTMENTAL -TYPE, SINGLE-PHASE
DISTRIBUTION TRANSFORMERS
WITH SEPARABLE
INSULATED LOAD BREAK HIGH -VOLTAGE CONNECTORS
APPROVED BY: 'A /�
Kraig E. ad
Standards Engineering Manager
ORIGINATED: 09/14/72
LAST REVISED: 7/21/2004
ITEMS COVERED BY THIS SPECIFICATION
DESCRIPTION
STOCK NO.
SPECIFICATION
NO.
SERIAL
25 KVA, 120240 ANSI Type 1 Transformer. 1
368-120
-130
50 KVA, 120240 ANSI Type 1 Transformer.
368-120
-150
50 KVA, 120/240 ANSI Type 2 Transformer.
368-120
- 155
100 KVA, 120/240 ANSI Type 1 Transformer.
368-120
-170
167 KVA, 120240 ANSI Type 1 Transformer.
368-120
-180
250 KVA, 120/240 ANSI Type 1 Transformer.'
368-120
-190
REV. SYM: FF
PREVIOUS REVISION DESCRIPTIONS ON FILE
REVISION DESCRIPTION
APPROVED
REVISION DD:
Sagan
• Paragraph 3.2.2.7.5: Editorial
10/21/94
• Add paragraph 3.2.2.9.4 requiring pentahead locking bolts
• Paragraph 3.2.2.13 add glossy to paint requirement
• Paragraph 4.2.2: Clarify impedance requirement
REVISION EE:
Sagan
• Paragraph 5.0: revised pallet size from 28 to 34 inches
2/25/98
REVISION FF
Kraig Bader
• Added 50kVA ANSI Type 2 Transformer (368-120-155) to Specification
7/212004
• Changed paint color to standard Munsell Green
• Reorganized to consolidate impedance and fusing requirements into one table.
• Consolidated secondary terminal requirements into one table.
• Added maximum impedance requirement for 250kVA transformer (+/-7.5% from nominal for
transformers with impedance greater than 2.5%) per ANSI/IEEE C57.12.00-2000.
• Re-evaluated fusing requirements of all transformers in this specification. Went from dual
sensing bay-o-net (expulsion) fuses to curent sensing bayonet (expulsion) fuses. Fuse sizing
was changed as follows:
• Changed 25 kVA from 8A expulsion / 40 amp CL to 10A expulsion / 30A CL
• Changed 50 kVA from 15A expulsion / 80 amp CL to 15A expulsion / 40A CL
• Changed 100 kVA from 25A expulsion / 175 amp CL to 25A expulsion / BOA CL
• Changed 167 kVA from 40A expulsion / 200amp CL to 40A expulsion / 125A CL
• Changed 250 kVA from 65A expulsion / 350amp CL to 65A expulsion / 125A CL
2
368-120