LUBBOCK, TEXAS 79403
Phone: (806) 775-2170 Fax: (806) 775-3590
PROPOSAL NUMBER: 7136-09-ELD
TITLE: LP&L Distribution Transformers 0209
DUE DATE: August 18, 2009 not later than 2:00 p.m. CST
DATE ISSUED: July 28, 2009
All requests for additional information or clarification must be submitted in writing and directed to:
Buyer Name: Ron Shuffield Phone: (806) 775-2170 Email:rshuffield@mylubbock.us
The following items take precedence over requirements for the above named Invitation To
Bid (ITB). Where any item called for in the ITB documents is supplemented here, the original requirements, not affected by this addendum, shall remain in effect.
1.
Please see the revised specification.
THANK YOU,
LUBBOCK POWER & LIGHT
Ron Shuffield
Purchasing Mgr. Electric Utilities

LUBBOCK POWER & LIGHT
Distribution Transformer Specification
DE-0012-070909

SECTION 1 - BID INVITATION AND ACCEPTABLE BIDDERS
1. Sealed bids will be received by the Lubbock Power & Light Purchasing Department, to establish firm pricing for distribution transformers.
2. No bid may be altered, withdrawn, or resubmitted after the date set for opening of the bids.
Lubbock Power & Light reserves the right to reject any and all bids, and to waive defects in bids.
3. Acceptable manufacturers: GE, Square D, Howard, Central Moloney, Ermco, ABB, Kuhlman,
Cooper, and Pauwels.
SECTION 2 - GENERAL BID REQUIREMENTS
1.0 GENERAL:
Each bidder must submit written evidence of their qualifications to Lubbock Power &
Light Electric Distribution Engineering Department not less than 15 days before the advertised date of bid opening, unless previous evidence has been supplied. Such evidence must include all information necessary to certify that the bidder:
1.1 Maintains a permanent place of business;
1.2 Does not anticipate change in ownership or major policy during the applicable calendar year. If such change is anticipated, the scope and effect thereof must be defined;
1.3 Has adequate plant and equipment available to do the work properly and expeditiously within the requested time;
1.4 Has adequate organization and qualified manpower available to efficiently prosecute the work;
1.5 Has adequate technical knowledge and practical experience;
1.6 Has adequate financial status to meet the financial obligations incident to the work;
1.7 Has no just or proper claims pending against them regarding the quality or performance of past work, and;
1.8 Has designed and manufactured new (not remanufactured or reconditioned) transformers similar to the type described in these specifications for at least five

years. Bidder should be able to supply a user's list and must be able to substantiate his claim of satisfactory operation in user's systems, if requested to do so.
Bids may be withdrawn, altered, and resubmitted at any time before the time set for opening the bid. Proposals may not be withdrawn, altered, or resubmitted after bid opening.
Lubbock Power & Light reserves the right to accept the bid which, in it's judgement, is the lowest and/or best bid; to reject any and all bids; and to waive irregularities and formalities in any bid that is submitted. Bids received after the specified time of closing will be returned unopened.
2.0 PREPARATION OF BIDS:
Only bids prepared in conformance with this section will be considered for evaluation.
Each bidder should supply the following information:
2.1 Exceptions. Any and all exceptions to this specification must be in writing and must accompany the bid. It will be assumed that all transformers offered by the bidder will be in strict accordance with these specifications unless otherwise noted by the bidder. Drawings alone will not be acceptable as exceptions.
2.2 Descriptive Literature and Drawings. Each bidder must supply descriptive literature and preliminary submittal drawings covering the transformers being bid. The literature and/or the drawings must describe the design, warranty, assembly and test methods, and detailed dimensions and must accompany the bid.
2.3 Transformer Data Sheets and Return Pages. Section 7 of this specification contains transformer data sheets and other information sheets which must be returned with the bid.
2.4 Pricing. All bidders must attach to the bid a copy of their current pricing policy.
This pricing policy will remain in effect for the term of this bid. Alternate pricing, such as bidding at firm price in addition to a bid based on an escalation clause, or submitting alternate bids where other than standard warranty is offered, is acceptable. Standard warranty period is one year from date of installation or

18 months from received of shipment whichever comes first. Bids submitted with pricing subject to future escalation based on BLS indices will not be accepted. As for bids based on other escalation factors, it is our intent to be able to calculate all future prices on the day the bids are opened.
3.0 EVALUATION OF BIDS:
All acceptable bids will be evaluated on an item by item basis. The following information will be considered in the evaluation: a. Compliance with specifications.
b. Price and pricing policy.
c. Stocking and delivery time.
d. Electrical characteristics.
e. Operational experience with bidder's products.
f. Warranty.
g. Local technical assistance and representation.
All acceptable bidders on each item will be ranked in accordance with the results of this evaluation. The number one bidder for each item will be the supplier with the best evaluation for that item. All number one bidders must give ninety (90) days written notice of any proposed changes in delivery, stocking policy, or design.
Bidders must supply price, delivery time, core losses, winding losses, and impedance for each item. Losses quoted must be guaranteed losses accurate within the tolerances listed in
ANSI Standard #C57.12.00-1987. Bids will be evaluated on price plus $5.60 per watt of core loss plus $1.70 per watt of winding loss.
LP&L reserves the right to accept as the winning bid, the lowest quoted price of all bids within 3 percent of the lowest evaluated cost. LP&L also reserves the right to selectively purchase transformers, regardless of numerical rating, for the purpose of establishing field experience with unfamiliar brands. LP&L also reserves the right to limit the amount of purchases, regardless of numerical rating, of transformers where no previous field experience exists.
A list of quantities to purchase shall be attached to this specifications at the time of bid.

Certified test results for core loss, winding loss, and impedance must be furnished for each unit. A penalty will be assessed on units exceeding the guaranteed losses. The penalty will be determined by calculating the sum of the product of the core loss factor and the tested core loss and the product of the winding loss factor and the tested winding loss. This sum will be compared to the sum of the products using the losses quoted in the bid. The difference will be the penalty. No monetary credit will be given for any evaluation sums better than those given in the bid. Manufacturers that do not furnish this information will be penalized $1,000 per bid item or $50.00 per unit purchased, whichever is greater. Invoices will not be paid until certified test results have been received. Results must be mailed to:
Lubbock Power & Light
Electric Distribution Engineering
P.O. Box 2000
Lubbock, Texas 79457
4.0 PURCHASING:
Individual purchase orders will be issued for each order and may include more than one item. Orders will be placed as needed and will be confirmed in writing. The number one bidder for an item will normally be contacted first to place an order. Should the number one bidder be unable to deliver transformers as quoted, then the number two bidder may receive the order. Winning bidder shall follow or stick to the delivery time they quoted (or better) even if the existing delivery at the time of order is longer.
A delimited text file shall be mailed or faxed to LP&L Engineering on the date the transformers are shipped. This file is required for payment processing of the shipment. This text file shall contain the following information shown in the given order below, separated by a comma,’,’ character with no spaces around the comma:
Serial Number,Manufacturere,Mounting type,Primary Voltage,Secondary Voltage,Number of
Phases,Frequency,KVA rating,Tap Voltages,Temperature rise,Polarity,Percent impedance,BIL,Approximate mass,Type of insulating liquid,Conductor material of each winding,Front type,Cost, LPL PO number,Date of PO Each line in the file should contain information about one (1) transformer in the shipment. If a field is not used there should still be a
‘,’ symbol to indicate there was nothing there as in (ADD,1.6,,75,Mineral). Also, units of measurements are assumed so no indication of units is necessary. Mass is assumed to be in Kilos.
Dates should be in format of MM/DD/YY. Currency should be in US Dollars. Contact LP&L
Engineering Dept. if you have questions.

When delivering transformers, the supplier must include a packing list showing the serial numbers of all units being delivered. Invoices should be sent to LP&L Accounting Dept. P.O.
Box 2000, Lubbock, Texas 79457. All invoices for payment must show serial numbers.

SECTION 3 - ENGINEERING REQUIREMENTS
1.0 GENERAL REQUIREMENTS:
Transformers must be designed, built, and supplied in accordance with the latest revisions of applicable ANSI Standards. Deviations from these standards will be acceptable only as described in this specification or by special approval in writing from Lubbock Power
& Light Distribution Engineering Department prior to ten days before bid opening.
It is the intent of Lubbock Power & Light to obtain transformers that incorporate stateof-the-art advancements and improvements that have been proven to successfully give long, dependable, and reliable service.
The manufacturer must receive written approval from Lubbock Power & Light
Distribution Engineering Department before changing the design or construction of transformers supplied from those bid.
All transformers offered for compliance with this specification must have a BIL rating of
95 KV. They must be of oil-immersed, self cooled, sealed tank construction, and must be designed for operation at 60 hertz. They must be capable of delivering rated KVA continuously without exceeding the rated winding temperature rise of 65°C in an average ambient temperature of 30°C for any 24 hour period where the maximum ambient temperature does not exceed 40°C.
Transformers purchased under this specification shall be of all new components and construction with Copper - Copper or Copper - Aluminum windings . Rebuilt or used parts, components or assemblies will not be permitted.
2.0 TAP REQUIREMENTS:
Taps requirements are indicated as follows:
(2A-2B) - 2.5% taps. 2 taps above & 2 taps below rated voltage.

3.0 IMPEDANCE REQUIREMENTS:
3.1 Padmount Transformers
10 - 25 KVA transformers:
37.5 - 75 KVA transformers:
Impedance must not be less than 1.5%.
Impedance must not be less than 1.7%.
100 - 500 KVA transformers: Impedance must not be less than 1.9%.
750 & larger transformers: 5.75%
±
7.5%
3.2 Pole Type Transformers
10 - 25 KVA transformers: Impedance must not be less than 1.5% and must not be greater than 2.0%.
37.5 - 75 KVA transformers:
100 KVA transformers:
Impedance must not be less than 1.7% and must not be greater than 2.2%.
Impedance must not be less than 1.9% and must not be greater than 2.5%.
167 KVA & larger transformers: Impedance must not be less than 2.0%.
4.0 PAINTING REQUIREMENTS:
4.1 Transformer tanks and enclosures must be painted in accordance with ANSI
Standard C57.12.28-1988 "Padmounted Equipment Enclosure Integrity".
4.2 Pole type transformers. Paint color must be Munsell #5BG7.0/0.4 blue gray or approved equal. Covers shall have an insulating paint coating capable of withstanding 12KV when applied at a 2KV/sec. rate of rise.
4.3 Padmount transformers. Paint color must be Munsell #7GY3.29/1.5 or
#7GY2.95/2.1 green or approved equal.
5.0 GASKETS:
Gaskets must provide a positive seal, must not take a permanent set, and must be reusable. Gasket material must be "Buna-N" rubber, "Nitrile" rubber, or approved equal.

6.0 PRESSURE RELIEF DEVICE:
The transformers covered by this specification must be equipped with an automatic pressure relief device which will safely relieve excessive internal tank pressure. This device must automatically open to relieve tank pressure in excess of designed tank pressure and must automatically reseal after relieving the pressure. This device must also have the provision for manual release of internal tank pressure to permit cover removal at zero tank pressure.
7.0 SHIPPING & DELIVERY:
All transformers are to be shipped on pallets where feasible. The unit must be anchored to the pallet and blocked at the base to prevent shifting. Transformers must be delivered in single layers to facilitate unloading. Transformers delivered in multiple layers will not be accepted. Each shipment must include a packing list showing the serial numbers of all units in the shipment. Deliveries accepted only on normal business days prior to 4:00 PM.
8.0 TRANSFORMER NAMEPLATE:
Each transformer must have a durable corrosion resistant metal nameplate affixed to a nameplate pad. The nameplate and location must be as specified in the latest revision of the applicable ANSI standard for each type of transformer.
9.0 FUSE INDICATION:
The size, type, and catalog number of the current limiting fuse must be permanently indicated on all padmount transformers. This indication must appear on the nameplate, the inside of the door of the primary compartment, or an inside wall of the primary compartment.
10.0 SAFETY LABELS:
Safety labels shall be affixed to the inside and outside of all padmounted units in accordance with NEMA Standard 260-1991 (Safety Labels for Pad Mounted Switchgear and
Transformers Sited in Public Area).

SECTION 4 - SINGLE PHASE POLE TYPE TRANSFORMER REQUIREMENTS
1.0 GENERAL REQUIREMENTS:
The tank bottom must be recessed within the tank cylinder. The bottom flange and tank end must be formed and welded to create a base bearing surface sufficient to support the weight of the finished transformer. The tank cover must be formed of the same material as the tank and must be dome shaped for strength and water shedding capabilities. Tank cover shall be insulated. Transformers with an internal tap changer must be supplied with a hand hole cover for access to the tap changer. Both the main cover and the hand hole cover must be gasketed and provided with a positive clamping mechanism to ensure a positive seal. The transformer tank, the tank cover, and the hand hole cover must be designed to retain and protect the gaskets. Surface areas of the tank and cover to be in contact with the gaskets must be formed flat to provide a good gasket seat. Tank opening for bushing mounts must be keyed to prevent the bushings from rotating. Lifting lugs, ground pads, mounting brackets, standard lightning arrester mounting nuts adjacent to both primary bushings, and nameplate brackets must be welded to the tank.
2.0 PRIMARY BUSHINGS:
All transformers covered by the section must be supplied with two (2) primary bushings.
Transformers must have 15 KV class cover mounted bushings. Bushings must be wet process, sky gray, glazed porcelain. Bushings must be securely mounted with gaskets between the tank wall or cover and the bottom bushing skirt, and between the top of the bushing and the terminal casting.
3.0 SECONDARY BUSHINGS:
Secondary bushings must be located on the transformer tank wall in accordance with the latest revision of ANSI Standard #C57.12.20. Bushings must be rated at least 1.2 KV and have a minimum BIL of 30 KV.
Wet process, sky gray, porcelain or epoxy bushings will be acceptable. Secondary bushings must be of copper stud type construction with terminals attached to the external end

of the bushing stud and keyed to the single clamp, double clamp or spade. Bushings must be securely mounted and sealed to protect against the possibility of oil leaks.
4.0 PRIMARY AND SECONDARY TERMINALS:
Terminals must be supplied to meet the latest revision of ANSI Standard #C57.12.20 and must be tin plated to accept either copper or aluminum conductors and connectors.
5.0 INTERNAL CONNECTIONS:
All internal connections which terminate at studs must be securely retained with the last nut on the stud backed up by another nut or a "pal" nut to protect against the connection working loose and to maintain a tight electrical connection.
6.0 TAP CHANGER:
The transformer taps must be equipped with a tap changer mounted in the tank below the normal cold oil level. An external operating handle is preferred, however, an internal handle is acceptable if that handle is accessible through a hand hole cover. Tap changers with an internal operating handle must be designed such that the tap position is clearly visible and the operating handle is located above the hot oil level.
7.0 MISCELLANEOUS ACCESSORIES:
Each transformer must be equipped with the following:
1.
Liquid level indication for 25°C.
2.
Support lug.
3.
Lifting lugs.
4.
Grounding provisions.
5.
Lightning arrester mounting nuts adjacent to each primary bushing.
Size, type and location of these accessories must be in accordance with the applicable requirements of the latest revision of ANSI Standard #C57.12.20.

POLE TYPE TRANSFORMERS TO BE BID
BID
ITEM KVA
10
15
25
37.5
50
333
500
10
15
50
75
75
250
25
37.5
50
75
100
167
250
PRIMARY
VOLTAGE
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
SECONDARY
VOLTAGE
TAPS
REQUIRED
120/24O
120/240
120/240
120/240
120/240
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
QUANTITY
TO BE
PURCHASED
0
0
0
0
0
240/480
240/480
240/480
240/480
240/480
240/480
240/480
120/240’Y’
120/240
120/240’Y’
120/240
120/240
120/240
240/480
240/480
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

POLE TYPE TRANSFORMERS TO BE BID
167
250
333
500
167
250
333
500
333
500
50
75
100
BID
ITEM KVA
PRIMARY
VOLTAGE
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
7200/12470Y
SECONDARY
VOLTAGE
TAPS
REQUIRED
240/480
240/480
277
277
277
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
AVG
ANNUAL
QUANTITY
PURCHASED
0
0
0
0
0
277
277
277
277
2400/4160Y
2400/4160Y
2400/4160Y
2400/4160Y
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
0
0
0
0
0
0
0
0

SECTION 5 - SINGLE PHASE PADMOUNT TRANSFORMER REQUIREMENTS
1.0 GENERAL REQUIREMENTS:
The single phase padmount transformers described, and shown in the one-line diagram herein, must be designed, constructed, and tested in accordance with the latest revision of
ANSI Standard #C57.12.25 except as modified by these specifications. The transformers must be of dead front, loop feed primary construction with internal fusing and have live front secondary bushings with terminals. Safety labels meeting NEMA Standard No.260-1991 must be applied by the transformer manufacturer.
2.0 ENCLOSURE CONSTRUCTION:
The transformers are to be housed in a nominal 32 inch high enclosure which meets the requirements of ANSI C57.12.28, 1988. The transformer must consist of a tank and a terminal compartment for high and low voltage connections. The terminal compartment must have a lift up lid with hinges such that the lid may be removed. The lid must have provisions for padlocking and must have a captive penta head bolt securing the lid. The total assembly must be tamper resistant with all joints, edges, and seams designed to prevent the insertion of foreign articles into the transformer. With the exception of the one penta head bolt securing the lid, there must be no exposed nuts or bolts. Terminal locations and other dimensions must be in accordance with the Type 1 layout dimensioned in ANSI Standard
#C57.12.25-1990.
The bottom of the transformer enclosure shall be raised above the pad to protect the bottom finish during installation. Also, the enclosure’s bottom portion shall have undercoating applied over the regular finish and extending up the side to a point one to two inches above the bottom of their bases in a straight edge. These are to protect the inside bottom from moisture accumulation and outside bottom from constant exposure to water from landscaping sprinklers.
3.0 PRIMARY SWITCH REQUIREMENTS:
Loop feed switching is to be accomplished with load break separable connectors.
Transformers are to be furnished with externally clamped bushing wells and 8.3/14.4 KV

load break bushing inserts. Bushings are to be of the piston type as manufactured by
Elastimold, C.E.C., or Cooper Power Systems. Bushing ratings and dimensions must meet the requirements of the latest revisions of ANSI/IEEE Standard #386. Internal busing between bushings must meet the requirements of the latest revision of ANSI Standard
#C57.12.25-1990. The type of bushings that will be supplied must be indicated on the appropriate data sheet at the end of this specification.
SINGLE PHASE PADMOUNT LOOP FEED TRANSFORMER
ONE LINE DIAGRAM
Transformer Tank
Bayonet Fault
Sensing Fuse
Partial Range Current
Limiting Fuse
8.3/14.4 KV Load Break Bushing
4.0 PRIMARY FUSING REQUIREMENTS:
Transformers are to be fused with a load break bayonet fault sensing fuse (RTE
#4000353C or approved equal) in series with an 8.3 KV rated internal partial range current limiting fuse (RTE ELSP #3543XXXM51M or approved equal). Drip shields must be provided on all bayonet tubes. The type of fusing that will be supplied must be indicated on the appropriate data sheet at the end of this specification.
5.0 SECONDARY BUSHINGS:

Two spade "H" type, wet process glazed porcelain or epoxy bushings are to be furnished.
These bushings are to be designated "X1" & "X3" and should be located on the transformer tank wall as per the Type 1 layout dimensioned in ANSI Standard #C57.12.25-1990. A neutral ground terminal, instead of an insulated bushing, may be furnished for the "X2" connection. The bushings must be externally removable and retained with an externally adjustable keeper plate. A gasket must be used between the tank wall and bushing and must be retained by the bushing keeper plate.
6.0 SECONDARY TERMINALS:
All secondary and ground terminals must be spade "H" type. The terminals must be tin plated to accept either copper or aluminum cables and connectors.
7.0 TAP CHANGER:
All single phase padmounted transformers must be equipped with an externally operated tap changer. The tap changer must be located below the normal cold oil level. Tap positions must be clearly marked and easily viewed.
8.0 MISCELLANEOUS ACCESSORIES:
Each transformer must be equipped with the following:
1.
Liquid level indication for 25°C.
2.
Lifting lugs or threaded bolt holes positioned for and capable of lifting entire padmount unit.
3.
Provisions for grounding on the transformer tank.

SINGLE PHASE PADMOUNT LOOP FEED TRANSFORMERS TO BE BID
BID
ITEM KVA
PRIMARY
VOLTAGE
50 12470 GY/7200
75 12470 GY/7200
1
2
100 12470 GY/7200
167 12470 GY/7200
SECONDARY
VOLTAGE
TAPS
REQUIRED
240/120
240/120
240/120
240/120
2A-2B
2A-2B
2A-2B
2A-2B
QUANTITY
TO BE
PURCHASED
0
0
22
17
3 250 12470GY/7200 240/120 2A-2B 11

SECTION 6 - THREE PHASE PADMOUNT TRANSFORMER REQUIREMENTS
1.0 GENERAL REQUIREMENTS:
The three phase padmount loop feed and transformers described, and shown in the oneline diagrams herein, must be designed, constructed, and tested in accordance with the latest revision of ANSI Standard #C57.12.26 except as modified by these specifications.
Dimensions shall be in accordance with the specific requirements shown in Figures 6, 7, and
8A of ANSI Standard #C57.12.26-1987. The transformers must be of oil-immersed, selfcooled (OISC) construction. The transformers must be of dead front design with primary fusing and a primary load break device for disconnecting the transformer. Safety labels meeting NEMA Standard No. 260-1991 must be applied by the transformer manufacturer.
2.0 ENCLOSURE CONSTRUCTION:
The padmount enclosure is to consist of a transformer tank, a primary and secondary terminal compartment, and a false cover. A full length steel isolating barrier must be installed in the terminal compartment to separate the primary and secondary sections.
Enclosure height must be no more than the tank height plus 10 inches. The complete unit must be of tamper resistant construction meeting the requirements of the ANSI Standard
#C57.12.28-1988. There must be no bolts or nuts exposed to the outside of the enclosure.
The transformer base must be fabricated to raise the tank bottom from ground level and permit the tank to be skidded in any direction. Radiators or cooling fins must be installed to ensure adequate cooling. A bolted tank cover is preferred, but a welded cover will be acceptable. A hand hole must be provided to facilitate replacement of bushings or for access to internal connections for testing. This hand hole is to be supplied with a bolted cover and must be gasketed. The retainer bolts of the hand hole cover must be located inside the terminal compartment and accessible only after the doors have been opened.
The terminal compartment must be attached to the transformer tank and is to house the primary and secondary cable connections to the transformer bushings. This compartment must have a removable front sill to permit the transformer to be skidded into place on the pad without disturbing the primary and secondary cables. Access to the compartments are to be

available through side opening hinged doors which must be removable when the doors are open. The doors are to be constructed such that entrance into the primary compartment can be achieved only after the secondary compartment door has been opened. The secondary door must have provisions for padlocking. Both doors are to be equipped with rod stops to hold the doors securely in the open position.
3.0 LOOP FEED PRIMARY SWITCH REQUIREMENTS:
Loop feed transformers are to be of dead front design with externally clamped universal type bushing wells, load break bushing inserts, and internal loop feed switching. The switch must be oil-immersed, 3-phase, gang-operated, load break, 200 amp, 15 KV, and 4-position with two handles in the primary compartment or approved equal. Switch must allow transfer from circuit A to circuit B without interrupting the transformer load. Switch positions must be clearly labeled in the primary compartment (A & B open; A open, B closed; A closed, B open; A & B closed). V-Blade and two-switch configurations are acceptable . T-Blade is not acceptable. The switch supplied must be indicated on the appropriate data sheet at the end of this specification .
THREE PHASE PADMOUNT LOOP FEED TRANSFORMERS
ONE LINE DIAGRAM
Transformer Tank
Bayonet Fault
Sensing Fuse
Partial Range Current
Limiting Fuse
Load break 200 amp
15 KV 4 position
3-phase switch
8.3/14.4 KV Load Break Bushing

4.0 PRIMARY FUSING REQUIREMENTS:
Fuses are to be load break bayonet fault sensing fuses (RTE #4000353C or approved equal) in series with 15.5 KV rated internal partial range current limiting fuses (RTE ELSP
#3544XXXM51M or approved equal). Drip shields must be provided on all bayonet tubes.
Three spare bayonet fuses must be provided and stored within the transformer compartment.
The type of fusing that will be supplied must be indicated on the appropriate data sheet at the end of this specification.
5.0 PRIMARY BUSHINGS:
Transformers primary bushings must be of the load break type suitable for use with
8.3/14.4 KV 200 amp elbow terminators and must meet the requirements of the latest revision of ANSI/IEEE Standard #386. The bushings wells must be externally removable and must be retained with externally adjustable keeper plates. Gaskets must be used between bushing wells and tank wall and must be retained by the keeper plate. Each well is to be furnished with a load break bushing insert.
6.0 SECONDARY BUSHINGS & TERMINALS:
Three spade type bushings and one spade type ground terminal must be located in the secondary compartment. Bushings must be externally removable and must be retained with an externally adjustable keeper plate. Gaskets must be used between bushings and tank wall and must be retained by the keeper plate. Wet process glazed porcelain bushings are preferred but epoxy bushings will be accepted. Bushings shall be designed to accept bushing mounted current transformers without obstructing any holes in the spade terminals. Bushings must be furnished with tin plated terminals which will accept either copper or aluminum conductors and connectors. The secondary terminals as well as the secondary compartment and clearance dimensions must meet the specific requirements of the latest revision of ANSI
Standard #C57.12.26., Figure 8(a). Transformers terminals shall have the number of holes as shown in the following table.

3-PHASE PADMOUNT SECONDARY TERMINAL HOLE REQUIREMENTS
KVA MINIMUM NUMBER OF
HOLES ON BUSHING LUGS
BUSHING
SUPPORT
208Y/120 UP TO 300 4 NO
500
750
1000 - 1500
8
12
16
NO
YES
YES
480Y/277 UP TO 500
750 - 1000
1500
6
8
10
NO
NO
YES
Hole sizes and spacing shall be as shown in Figure 9 of ANSI Standard #C57.12.26-
1987. Terminals with 10 or more holes shall be furnished with a support on the terminal outside end and attached to the compartment. This support shall be easily removed to allow installation of slip-on bushing CT's.
7.0 TAP CHANGER:
The transformer must be equipped with an externally operated tap changer. A tap changer for each phase must be located below the normal cold oil level. Phase tap changers are to be ganged together and connected to the operating handle located above the primary bushings in the primary compartment. Tap positions are to be clearly marked and easily viewed.

8.0 MISCELLANEOUS ACCESSORIES:
Each transformer must be equipped with the following:
1.
Liquid level indication for 25°C.
2.
Lifting lugs positioned for and capable of lifting entire pad mount unit.
3.
Provisions for grounding on the transformer tank in both the primary and secondary compartments.
4.
Oil fill plug.
5.
Oil level plug.
6.
Top filter press connection.
7.
Combination one inch oil drain valve, lower filter press connection, and sampling device located in the primary compartment.

THREE PHASE PADMOUNT LOOP FEED TRANSFORMERS TO BE BID
BID
ITEM
4
5
6
KVA
PRIMARY
VOLTAGE
75 12470 GY/7200
150 12470 GY/7200
225 12470 GY/7200
300 12470 GY/7200
500 12470 GY/7200
750 12470 GY/7200
1000 12470 GY/7200
1500 12470 GY/7200
75 12470 GY/7200
150 12470 GY/7200
225 12470 GY/7200
300 12470 GY/7200
500 12470 GY/7200
750 12470 GY/7200
1000 12470 GY/7200
1500 12470 GY/7200
SECONDARY
VOLTAGE
TAPS
REQUIRED
208Y/120
208Y/120
208Y/120
208Y/120
208Y/120
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
AVG
ANNUAL
QUANTITY
PURCHASED
3
2
0
0
0
208Y/120
208Y/120
208Y/120
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
480Y/277
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
2A-2B
0
0
0
0
0
0
0
0
0
3
0

SECTION 7 - TRANSFORMER DATA SHEETS & RETURN PAGES
This page and the following pages are to be completed and returned with each bid.
EXCEPTIONS:
Please note any exceptions to this specification in the space below. Indicate the Section and
Paragraph numbers of the exception noted. Attach additional pages if necessary.

POLE TYPE TRANSFORMER DATA SHEET
BIDDER
MANUFACTURER
10 333
11 500
12
13
10
15
14 25
15 37.5
16
17
50
75
18 100
19 167
20 250
8
9
6
7
4
5
2
3
ITEM KV
A
1 10
75
100
167
250
15
25
37.5
50
SEC VOLT.
120/24O
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
120/240
240/480
240/480
240/480
240/480
240/480
240/480
240/480
240/480
240/480
C.L.1
W.L.2
%Z3 DELIVERY PRICE

1 C.L. - NO LOAD OR CORE LOSS IN WATTS
2 W.L. - WINDING LOSS IN WATTS.
3 %Z
PERCENT IMPEDANCE
POLE TYPE TRANSFORMER DATA SHEET
ITEM KV
A
21 333
22 500
23
24
50
75
25 100
SEC VOLT.
240/480
240/480
277
277
277
26 167
27 250
28 333
29 500
277
277
277
277
30 167 2400/4160Y
31 250 2400/4160Y
32 333 2400/4160Y
33 500 2400/4160Y
C.L.1
1 C.L. - NO LOAD OR CORE LOSS IN WATTS
2 W.L. - WINDING LOSS IN WATTS.
3 %Z
PERCENT IMPEDANCE
W.L.2
%Z3 DELIVERY PRICE
Pole type transformers with taps will be equipped with:
Internal tap changer handle

External tap changer handle

SINGLE PHASE PADMOUNT LOOP FEED TRANSFORMER DATA SHEET
BIDDER
MANUFACTURER
ITEM KV
A
34 50
35 75
36 100
37 167
38 250
SEC VOLT.
240/120
240/120
240/120
240/120
240/120
C.L.1
W.L.2
%Z3 DELIVERY PRICE
1 C.L. - NO LOAD OR CORE LOSS IN WATTS
2 W.L. - WINDING LOSS IN WATTS.
3 %Z
PERCENT IMPEDANCE

SINGLE PHASE PADMOUNT LOOP FEED TRANSFORMER DATA SHEET
1. The piston type load break bushing inserts that will be supplied are:
Elastimold
C.E.C.
Cooper Power Systems
2. The primary fusing that will be supplied is (describe manufacturer, type, etc.):

THREE PHASE PADMOUNT LOOP FEED TRANSFORMER DATA SHEET
BIDDER
MANUFACTURER
ITEM KV
A
39 75
SEC VOLT.
208Y/120
40 150 208Y/120
41 225 208Y/120
42 300 208Y/120
43 500 208Y/120
44 750 208Y/120
45 1000 208Y/120
46 1500 208Y/120
47 75 480Y/277
48 150 480Y/277
49 225 480Y/277
50 300 480Y/277
51 500 480Y/277
52 750 480Y/277
53 1000 480Y/277
54 1500 480Y/277
C.L.1
W.L.2
1 C.L. - NO LOAD OR CORE LOSS IN WATTS @ 85 °
C
2 W.L. - WINDING LOSS IN WATTS @ 85 °
C
%Z3 DELIVERY PRICE

3 %Z
PERCENT IMPEDANCE

THREE PHASE PADMOUNT TRANSFORMER DATA SHEET
1.
Indicate the brand, type, model, etc., of switching and fusing that will be supplied to meet the requirements of Paragraphs 3.0 and 4.0 of this Section 6 - Three Phase
Padmount Transformer Requirements:
Loop Feed Switching:
Fusing:
2. Indicate bushing insert type:
Elastimold
C.E.C.
Cooper Power Systems