HomeMy WebLinkAboutBID - 6021 LP TRANSFORMER 50KVA MODIFIED OVERHADCity of Fort Collins
Bid Proposal
BID 6021
LP Transformer, 50kVA, Modified Overhead
BID DATE: 2:00 P.M. (Our Clock ) December 29, 2006
9/1/2006rev
CITY OF FORT COLLINS
INVITATION TO BID
BID 6021
LP Transformer, 50kVA, Modified Overhead
Sealed bids will be received and publicly opened at the office of the Director Of Purchasing and
Risk Management, PO Box 580, 215 North Mason St., 2nd floor, Fort Collins, Colorado 80524,
at the time and date noted on the bid proposal and/or contract documents. If delivered, they are
to be delivered to 215 North Mason Street, 2nd Floor, Fort Collins, Colorado 80524. If mailed,
the address is P.O. Box 580, Fort Collins, 80522-0580.
Bids must be received at the Purchasing Office prior to 2:00 p.m. (our clock), December
29, 2006.
Special Instructions
All bids must be properly signed by an authorized representative of the company with the legal
capacity to bind the company to the agreement. Bids may be withdrawn up to the date and hour
set for closing. Once bids have been accepted by the City and closing has occurred, failure to
enter into contract or honor the purchase order will be cause for removal of supplier's name
from the City of Fort Collins' bidders list for a period of twelve months from the date of the
opening. The City may also pursue any remedies available at law or in equity. Bid prices must
be held firm for a period of forty-five (45) days after bid openings.
Submission of a bid is deemed as acceptance of all terms, conditions and specifications
contained in the City's specifications initially provided to the bidder. Any proposed modification
must be accepted in writing by the City prior to award of the bid.
Only bids properly received by the Purchasing Office will be accepted. All bids should be clearly
identified by the bid number and bid name contained in the bid proposal.
No proposal will be accepted from, or any purchase order awarded, to any person, firm or
corporation in default on any obligation to the City.
Bids must be furnished exclusive of any federal excise tax, wherever applicable.
Bidders must be properly licensed and secure necessary permits wherever applicable.
Bidders not responding to this bid will be removed from our automated vendor listing for the
subject commodities.
The City may elect where applicable, to award bids on an individual item/group basis or on a
total bid basis, whichever is most beneficial to the City. The City reserves the right to accept or
reject any and all bids, and to waive any irregularities or informalities.
Sales prohibited/conflict of interest: no officer, employee, or member of City Council, shall have
a financial interest in the sale to the City of any real or personal property, equipment, material,
supplies or services where such officer or employee exercises directly or indirectly any decision-
making authority concerning such sale or any supervisory authority over the services to be
rendered. This rule also applies to subcontracts with the City. Soliciting or accepting any gift,
9/1/2006rev
gratuity, favor, entertainment, kickback or any items of monetary value from any person who
has or is seeking to do business with the City of Fort Collins is prohibited.
Freight terms: unless otherwise noted, all freight is F.O.B. Destination, Freight Prepaid. All
freight charges must be included in prices submitted on proposal.
Discounts: any discounts allowed for prompt payment, etc., must be reflected in bid figures and
not entered as separate pricing on the proposal form.
Purchasing restrictions: your authorized signature of this bid assures your firm's compliance
with the City's purchasing restrictions. A copy of the resolutions are available for review in the
Purchasing Office or the City Clerk's Office. Request Resolution 91-121 for cement restrictions.
Collusive or sham bids: any bid deemed to be collusive or a sham bid will be rejected and
reported to authorities as such. Your authorized signature of this bid assures that such bid is
genuine and is not a collusive or sham bid.
Bid results: for information regarding results for individual bids send a self-addressed,
self-stamped envelope and a bid tally will be mailed to you. Bid results will be posted in our
office 7 days after the bid opening.
James B. O’Neill II, CPPO, FNIGP
Director of Purchasing and Risk Management
9/1/2006rev
FIRM NAME:_____________________________
CITY OF FORT COLLINS
BID PROPOSAL
BID NO. 6021
LP Transformer, 50kVA, Modified Overhead
BID DATE: 2:00 p.m. (Our clock) December 29, 2006
WE HEREBY ENTER OUR BID FOR THE CITY OF FORT COLLINS' REQUIREMENTS FOR LP
Transformer, 50kVA, Modified Overhead PER THE BID INVITATION AND ANY REFERENCED
SPECIFICATIONS.
QUANTITY: DESCRIPTION:
50 Ea. Transformer, 50kVA, Modified Overhead, single Phase Distribution with one High
Voltage Bushing Well, High Voltage Rating: 13200 GRDY/7620. Low Voltage
Rating: 120/240. Serial Number 151 to be in Accordance with Specification
#368-105-151, Rev. KK
PLEASE COMPLETE THE ATTACHED EXCEL SPREAD SHEET
FOR BID SUBMITTAL.
IF YOU ELECT TO PASSWORD PROTECT YOUR BID, PLEASE
NOTE THAT PASSWORD BELOW.
DELIVERY MAY BE A CONSIDERATION OF BID AWARD
*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.
Guaranteed No Load Loss _____________________
Guaranteed Full Load Loss _____________________
Guaranteed Total Load Loss _____________________
Impedance (%) _____________________
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.
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 Transformer, 50kVA, Modified Overhead 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.
9/1/2006rev
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
____________________________________________________________________________
SIGNATURE AND TITLE: TYPED OR PRINTED NAME AND TITLE
____________________________________________________________________________
COMPANY NAME: (AREA CODE) TELEPHONE NUMBER/FAX NUMBER
____________________________________________________________________________
ADDRESS: STREET, CITY, STATE, ZIP DATE
EMAIL:
9/1/2006rev
Purchase Order Terms and Conditions
1. COMMERCIAL DETAILS.
Invoice Address. To ensure prompt Payment mail invoices in duplicate to:
City of Fort Collins Accounting Division
P.O. Box 580
Fort Collins, CO 80522
Tax exemptions. By statute the City of Fort Collins is exempt from state and local taxes. Our Exemption Number
is 98-04502. Federal Excise Tax Exemption Certificate of Registry 84-6000587 is registered with the Collector of
Internal Revenue, Denver, Colorado (Ref. Colorado Revised Statutes 1973, Chapter 39-26, 114 (a).
Goods Rejected. GOODS REJECTED due to failure to meet specifications, either when shipped or due to defects
of damage in transit, may be returned to you for credit and are not to be replaced except upon receipt of written
instructions from the City of Fort Collins.
Inspection. GOODS are subject to the City of Fort Collins inspection on arrival.
Final Acceptance. Receipt of the merchandise, services or equipment in response to this order can result in
authorized payment on the part of the City of Fort Collins. However, it is to be understood that FINAL
ACCEPTANCE is dependent upon completion of all applicable required inspection procedures.
Freight Terms. Shipments must be F.O.B., City of Fort Collins, 700 Wood St., Fort Collins, CO 80522, unless
otherwise specified on this order. If permission is given to prepay freight and charge separately, the original
freight bill must accompany invoice. Additional charges for packing will not be accepted.
Shipment Distance. Where manufacturers have distributing points in various parts of the country, shipment is
expected from the nearest distribution point to destination, and excess freight will be deducted from Invoice when
shipments are made from greater distance.
Permits. Seller shall procure at sellers sole cost all necessary permits, certificates and licenses required by all
applicable laws, regulations, ordinances and rules of the state, municipality, territory or political subdivision
where the work is performed, or required by any other duly constituted public authority having jurisdiction over
the work of vendor. Seller further agrees to hold the City of Fort Collins harmless from and against all liability
and loss incurred by them by reason of an asserted or established violation of any such laws, regulations,
ordinances, rules and requirements.
Authorization. All parties to this contract agree that the representatives are, in fact, bona fide and possess full and
complete authority to bind said parties.
LIMITATION OF TERMS. This Purchase Order expressly limits acceptance to the terms and conditions stated
herein set forth and any supplementary or additional terms and conditions annexed hereto or incorporated herein
by reference. Any additional or different terms and conditions proposed by seller are objected to and hereby
rejected.
2. DELIVERY.
PLEASE ADVISE PURCHASING AGENT immediately if you cannot make complete shipment to arrive on
your promised delivery date as noted. Time is of the essence. Delivery and performance must be effected within
the time stated on the purchase order and the documents attached hereto. No acts of the Purchasers including,
without limitation, acceptance of partial late deliveries, shall operate as a waiver of this provision. In the event of
any delay, the Purchaser shall have, in addition to other legal and equitable remedies, the option of placing this
order elsewhere and holding the Seller liable for damages. However, the Seller shall not be liable for damages as
a result of delays due to causes not reasonably foreseeable which are beyond its reasonable control and without
its fault of negligence, such acts of God, acts of civil or military authorities, governmental priorities, fires, strikes,
flood, epidemics, wars or riots provided that notice of the conditions causing such delay is given to the Purchaser
within five (5) days of the time when the Seller first received knowledge thereof. In the event of any such delay,
the date of delivery shall be extended for the period equal to the time actually lost by reason of the delay.
3. WARRANTY.
The Seller warrants that all goods, articles, materials and work covered by this order will conform with applicable
drawings, specifications, samples and/or other descriptions given, will be fit for the purposes intended, and
performed with the highest degree of care and competence in accordance with accepted standards for work of a
similar nature. The Seller agrees to hold the purchaser harmless from any loss, damage or expense which the
Purchaser may suffer or incur on account of the Sellers breach of warranty. The Seller shall replace, repair or
make good, without cost to the purchaser, any defects or faults arising within one (1) year or within such longer
period of time as may be prescribed by law or by the terms of any applicable warranty provided by the Seller
after the date of acceptance of the goods furnished hereunder (acceptance not to be unreasonably delayed),
resulting from imperfect or defective work done or materials furnished by the Seller. Acceptance or use of goods
by the Purchaser shall not constitute a waiver of any claim under this warranty. Except as otherwise provided in
this purchase order, the Sellers liability hereunder shall extend to all damages proximately caused by the breach
of any of the foregoing warranties or guarantees, but such liability shall in no event include loss of profits or loss
9/1/2006rev
Directions for Bidders:
1) Fill out the information in the cells with blue text.
2) Save the file using your company name and the bid number and e-mail it to: purchasing@fcgov.com
(Example: TransformerSales_Bid 6021.xls)
If you are concerned about security, you may password-protect this file after you have entered your data.
To protect this file, take the following steps:
1) Select Tools, Options
2) Select Security Tab
3) Type your password in the "Password to Open" field.
4) Re-enter your password to confirm it.
Important! Please remember to include this password in the bid information that will be sealed in
the envelope that will be unsealed at Bid Opening. This will secure your data until the time of the bid opening.
5) Save the file and e-mail it to: purchasing@fcgov.com
Fort Collins Utilities Transformer Bid Loss Data Sheet
# Units 50 Bid # 6021 Preparer Name : Name
Size Date: Preparer Contact Num: Number
NL Loss Cost
FL Loss Cost
Supplier Mfr / Mfr#
Base Bid
$ / Each Del/Wks
Guar No
Load Loss
Guar Full
Load Loss
Impedanc
e
Meet
Specs?
(Yes / No)
Escalation
(is / is not)
a factor
Guar Total
Load Loss
NL Loss *
NL Loss
Cost
FL Loss *
FL Loss
Cost
Evaluated
Bid
Base Bid
Extended
Cost
(Total $)
Supplier 1 Mfg 1 $ - - 0 0 0.00 - - 0- $ $ - $ - $ -
Supplier 2 Mfr 2 $ - - 0 0 0.00 0- $ $ - $ - $ -
Supplier 3 Mfr 3 $ - - 0 0 0.00 0- $ $ - $ - $ -
THE CITY OF FORT COLLINS
Light and Power Department
P.O. Box 580
Fort Collins, CO 80522
SPECIFICATION NO: 368-105
TITLE: OVERHEAD-TYPE, SINGLE PHASE
DISTRIBUTION TRANSFORMERS
WITH SEPARABLE
INSULATED LOAD BREAK HIGH-VOLTAGE CONNECTORS
PREPARED BY: ____
Tim M. Sagen, Standards Engineering Manager
ORIGINATED: March 3, 1973
REVISED: February, 2003
Rev. Sym. KK
2
368-105
REVISION DESCRIPTIONS
REVISION DESCRIPTION (Previous revisions on file) APPROVED
Rev. II
• Updated Table of Contents
• Paragraph 3.2.2.1.1; 3.2.4.2. - Editorial
• Paragraph 3.2.3.1. - updated ANSI reference
• Paragraph 3.2.3.2. - changed lead type terminals to stud type, updated ANSI
reference to 1985.
• Paragraph 3.2.5.2 - Deleted reference to Table II
• Paragraph 3.2.5.6. - Updated ANSI reference; changed “non-PCB” reference to
“contains < 1 ppm PCB
• Paragraph 3.2.6.1. - Change Table III to Figure 2
• Paragraph 3.2.7. - Delete ratio requirement, update ANSI reference to 1987.
• Paragraph 4.2.2. - Change impedance tolerance to within range specified.
• Table 1: Change lead type LV terminals to stud type. Add impedance ranges on 131,
151, and 156.
• Add Figure 1
• Changes Table III to Figure 2
• Appendix C – delete tank coating from table.
Sagen/Coram
7/27/94
Rev. JJ
• Paragraph 5.0 – Added pallet requirements
Sagen 9/4/97
Rev. KK
• Update date specific references to ANSI standards.
• Add reference to Central Moloney secondary bushings.
• Add Central Moloney to Approved Manufacturers list in Appendix C.
Sagen 2/20/2003
Rev. Sym. KK
3
368-105
TABLE OF CONTENTS
REVISION DESCRIPTIONS ...................................................................................................................................................2
1 SCOPE .................................................................................................................................................................................4
2 APPLICABLE DOCUMENTS ..............................................................................................................................................4
3 REQUIREMENTS.................................................................................................................................................................4
3.1 GENERAL REQUIREMENTS FOR DESIGN.............................................................................................................................4
3.2 SPECIFIC REQUIREMENTS FOR DESIGN ..............................................................................................................................4
3.2.1 FUNCTIONAL DESCRIPTION.............................................................................................................................................4
3.2.2 RATINGS................................................................................................................................................................................4
3.2.3 BUSHINGS AND TERMINALS .............................................................................................................................................5
3.2.4 NEUTRAL TERMINATION ...................................................................................................................................................6
3.2.5 ACCESSORY EQUIPMENT ..................................................................................................................................................6
3.2.6 TANK......................................................................................................................................................................................8
3.2.7 LOSSES..................................................................................................................................................................................9
4 QUALITY ASSURANCE......................................................................................................................................................9
4.1 GENERAL....................................................................................................................................................................................9
4.1.1 RESPONSIBILITY FOR INSPECTION .................................................................................................................................9
4.1.2 TEST REPORT.......................................................................................................................................................................9
4.2 TEST CONDITIONS....................................................................................................................................................................9
4.2.1 REFERENCE TEMPERATURE.............................................................................................................................................9
4.2.2 TOLERANCE ON IMPEDANCE VOLTAGE.........................................................................................................................9
4.2.3 TOLERANCE ON IMPEDANCE VOLTAGE ON A TAP.......................................................................................................9
4.3 NOT USED .................................................................................................................................................................................10
4.4 TESTS.........................................................................................................................................................................................10
5 PREPARATION FOR DELIVERY......................................................................................................................................10
APPENDIX A – TRANSFORMER STOCK NUMBER CODING ..........................................................................................11
APPENDIX B – TANK COATING COMPARISON...............................................................................................................12
APPENDIX C – APPROVED MANUFACTURERS..............................................................................................................13
TRANSFORMER LOSS EVALUATION FORM- AVERAGE LOSSES................................................................................14
INDIVIDUAL TRANSFORMER LOSS EVALUATION FORM..............................................................................................15
SPECIAL CONDITIONS ANDSUPPLEMENTAL INSTRUCTIONS TO BIDDERS .............................................................16
Rev. Sym. KK
4
368-105
SPECIFICATION FOR OVERHEAD-TYPE, SINGLE PHASE DISTRIBUTION TRANSFORMERS
WITH SEPARABLE INSULATED LOAD BREAK HIGH-VOLTAGE CONNECTORS
1 SCOPE
This Specification establishes the minimum requirements for single phase, 60 hertz, mineral-oil-filled self cooled
(O.I.S.C.) overhead-type distribution transformers with separable insulated load break high voltage connectors; rated
250 kilovolt-amperes (KVA) and smaller; high-voltage: 7620/13200Y and dual voltage 7620/13200Y x 2400/4160Y; low
voltage 120/240, 240/480, 277 volts, and 4160Y/2400.
2 APPLICABLE DOCUMENTS
The following American National Standards (ANSI) for Distribution, Power, and Regulating Transformers and Shunt
Reactors form a part of this Specification:
• General Requirements C57.12.00
• Overhead-Type Distribution Transformers C57.12.20
• Terminal Marking and Connections C57.12.70
• Terminology C57.12.80
• Test Code C57.12.90
• Appendix to ANSI C57.12.20 C57.91
• Separable Insulated Connectors ANSI/IEEE 386
3 REQUIREMENTS
3.1 GENERAL REQUIREMENTS FOR DESIGN
Unless otherwise stated in this Specification, all transformers shall be new and shall conform to the American
National Standard Requirements for Overhead-Type Distribution Transformers, ANSI C57.12.20 - latest
revision. In case of conflict, the requirements of the following documents shall apply in the priority shown:
1. This Specification.
2. Referenced ANSI Standards.
Approved manufacturers are listed in Appendix C. For purposes of warranty and service, any distributor bidding
must be an authorized distributor appointed by an approved manufacturer to serve the Fort Collins area.
3.2 SPECIFIC REQUIREMENTS FOR DESIGN
3.2.1 FUNCTIONAL DESCRIPTION
Transformers of this design are for installation on an underground power system utilizing separable
insulated connectors and may be installed in underground vaults subject to submersion. They may also
be padmounted under an enclosure, or pole mounted. The transformer tank, cover, and all external
appurtenances shall be of corrosion-resistant material, unless they are otherwise rendered corrosion
resistant.
3.2.2 RATINGS
3.2.2.1 KILOVOLT-AMPERE-RATINGS
3.2.2.1.1 NAMEPLATE RATING
Kilovolt-ampere ratings are continuous and based on not exceeding either a 65°C average winding
temperature rise or an 80°C hot spot temperature rise. The temperature rise of the insulating oil shall
not exceed 65° when measured near the top of the tank. The KVA rating shall be regarded as a test
rating which defines an output which can be taken from the apparatus under the prescribed conditions
of test within the limitations of all applicable standards. KVA ratings shall be in accordance with Table-
1.
Rev. Sym. KK
5
368-105
3.2.2.1.2 ADDITIONAL SUPPLEMENTAL LOADING
Additional supplemental loading may be carried as recommended by ANSI C57.91.
3.2.2.2 VOLTAGE RATINGS
Secondary and primary voltage ratings shall be in accordance with Table 1.
3.2.2.3 IMPEDANCE
Nominal impedance voltage shall be in accordance with Table 1 of this specification. Completed units may
vary from the specified nominal up to the tolerance specified in ANSI C57.12.00.
3.2.2.4 BASIC IMPULSE INSULATION LEVELS
The high voltage BIL shall be 95 kV. The low voltage BIL shall be 30 kV.
3.2.3 BUSHINGS AND TERMINALS
All internal leads and connections, on both high and low voltage, shall be sized to carry full ampere
rating, including overload rating of transformer.
3.2.3.1 HIGH VOLTAGE TERMINALS
The number of high voltage terminals required is specified in Table 1. High-voltage bushing wells shall be
cover mounted 200A load-break interface 8.3/14.4 kV bushings in accordance with ANSI/IEEE Std. 386.
3.2.3.2 LOW VOLTAGE TERMINALS
Terminal type and number shall be in accordance with Table 1 of this specification. Eyebolt and spade
terminals shall be singly mounted sidewall type. Stud type terminals shall be singly mounted on the
sidewall at 5.5 to 7.5 inch center to center spacing. Stud type terminals shall be equivalent to Central
Moloney type 7013 having dimensions in accordance with Figure 1 of this specification or Central Moloney
type 70105850, shall have a copper stud, and shall be internally or externally clamped. All non-metallic
components of the terminals shall be of a material resistant to ultra-violet degradation. Mounting hardware
shall be corrosion resistant. Secondary terminals for transformers with secondary voltages above 480V
shall be cover mounted 200A load-break interface 8.3/14.4 kV bushings in accordance with ANSI/IEEE Std
386.
kVA Rating Thread Size Min. Length
25 - 75 0.625” – 11 UNC-2A 1.25”
100 - 167 1.0” – 14 UNC-2A 1.75”
See below
1.38” dia.
Figure 1
Rev. Sym. KK
6
368-105
3.2.4 NEUTRAL TERMINATION
3.2.4.1 On transformers having one high voltage bushing, the H2 end of the winding shall be securely grounded
internally.
3.2.4.2 On units having three external eyebolt or spade type low-voltage terminals, the X2 connection of the
winding shall be isolated and an adequate external copper ground strap shall be provided from the neutral
bushing to a standard tank ground pad.
On units having lead type low-voltage terminals, the X2 connections of the winding shall be connected to
the tank internally and such connection shall be indicated on a label next to the X2 lead as well as on the
nameplate.
Ground connections shall be suitably sized for the short-circuit rating of the transformer as defined in ANSI
C57.12.00.
3.2.4.3 An adequate stainless steel connection shall provide electrical continuity between the tank and the cover.
3.2.5 ACCESSORY EQUIPMENT
In addition to the requirements of ANSI, accessory equipment shall be provided in accordance with
Table 1 and the following details.
3.2.5.1 Current-protecting (CP) when specified in Table 1 shall include internal weaklink primary fuse, secondary
breaker, signal light, and emergency control handle. Internal fusing (internal) when specified in Table 1
shall include an internal partial range current limiting fuse in conjunction with an internal eutectic
(temperature sensitive) weak link fuse.
3.2.5.2 When required by Table 1, an RTE Bay-o-net fuse and internally mounted ELSP partial range current
limiting fuse(s) shall be furnished. Bay-o-net fuses shall be top mounted or sidewall mounted as required in
Table 1.
3.2.5.3 When the transformer is specified as a dual voltage unit, an externally operated dual voltage switch shall
be provided.
3.2.5.4 Taps, when required, shall be full capacity above and below normal and shall be provided with an
externally operated tap changer switch. On dual voltage transformers, taps shall be furnished on the top
voltage only.
3.2.5.5 Cover mounted, pocket type, cable accessory, parking stand for a loadbreak stand off device shall be
provided.
3.2.5.6 Cover mounted instruction nameplate conforming to 5.12 of ANSI C57.12.00-1987, Nameplate A, shall be
provided. Also, on the nameplate or label affixed near it, the manufacturer shall indicate that the dielectric
fluid contains less than 1 ppm PCB.
Rev. Sym. KK
7
368-105
TABLE 1
HIGH VOLTAGE LOW VOLTAGE
TAPS
STOCK
NO. 368-
105 -
SERIAL
KVA
% Z
RATING
TERMINAL(S)
ABOVE BELOW
RATING
TYPE AND
NUMBER OF
TERMINALS
PROTECTION
TYPE (1)
-111 10 TBD 13200 GRDY/7620 One bushing well - - 120/240* Three Eyebolt CP
-131 25 1.77 to 2.16 13200 GRDY/7620 One bushing well - - 120/240* Three CU stud CP
-151 50 1.77 to 2.16 13200 GRDY/7620 One bushing well - - 120/240* Three CU stud CP
-155 50 TBD 7620/13200Y Two bushing wells 2-2½% 2-2½% 120/240* Three 4 hole
"H"
S
-156 50 TBD 13200 GRDY/7620 One bushing well - - 240/480 Three Eyebolt CP
-161 75 1.86 to 2.27 13200 GRDY/7620 One bushing well - - 120/240* Three CU stud Internal
-171 100 TBD 13200 GRDY/7620 One bushing well - - 120/240* Three Eyebolt Internal
-174 100 TBD 13200 GRDY/7620 One bushing well 2-2½% 2-2½% 120/240 Four 6 hole "J" Internal
-175 100 TBD 7620/13200Y Two bushing wells 2-2½% 2-2½% 120-240 Four 6 hole "J" S
-176 100 TBD 13200 GRDY/7620 One bushing well 2-2½% 2-2½% 277 Two 4 hole "H" Internal
-177 100 TBD 7620/13200Y Two cover mounted
bushing wells 2-2½% 2-2½% 2400/4160Y
Two cover
mounted
bushing wells
S
-184 167 TBD 13200 GRDY/7620 One bushing well 2-2½% 2-2½% 120/240 Four 6 hole "J" Internal
-185 167 TBD 7620/13200Y Two bushing wells 2-2½% 2-2½% 120/240 Four 6 hole "J" S
-186 167 TBD 13200 GRDY/7620 One bushing well 2-2½% 2-2½% 277 Two 4 hole "H" Internal
-189 167 TBD 13200 GRDY/7620 One cover mounted
bushing wells - -
4160GRDY/ 2400 One cover
mounted
bushing well
S
-195 250 TBD 7620/13200Y Two bushing wells 2-2½% 2-2½% 120/240 Four 6 hole "J" S
-196 250 TBD 13200 GRDY/7620 One bushing well 2-2½% 2-2½% 277 Two 6 hole "J" Internal
-231 25 TBD 13200 GRDY/7620x
4160 GRDY/2400
One bushing well - - 120/240* Three Eyebolt CP
-238 25 TBD 13200 GRDY/7620x
4160 GRDY/2400
One bushing well 2-2½% 2-2½% 240/480 Three Eyebolt CP
-251 50 TBD 13200 GRDY/7620X
4160 GRDY/2400
One bushing well - - 120/240* Three Eyebolt CP
-258 50 TBD 13200 GRDY/7620X
Rev. Sym. KK
8
368-105
3.2.6 TANK
3.2.6.1 An adequate tank coating for underground vault application shall be provided. Appendix B is provided as a
reference for comparing coating requirements. The Light and Power Department, Engineering Division, is
the only authority regarding the adequacy of proposed coatings. Figure 2 shows outside dimensions.
Maximum Clearance Dimensions (inches)
kVA A B C*
75 and below 27 33 44
100 and above 36 36 50
** C dimension is to the top of the bushing well insert, (City provided)
3.2.6.2 PRESSURE
The tank shall be equipped with a Qualitrol #202-014-01 or 202-030-01 pressure relief device or a
pressure relief cover. If a pressure relief cover is used, the cover assembly shall remain effectively sealed
for overloads and external secondary short circuits of the magnitude and duration allowed by industry
standards and loading guides, but shall relieve pressure at a minimum of 8 psi gauge if designed to reseal;
or at a minimum of 20 psig if designed for pressure relief without resealing. If a pressure relief cover is
used, a manual means of venting the tank before removal of the cover shall be provided. Regardless of
which means of pressure relief is provided, the tank and other components of the tank shall be of sufficient
strength to withstand, without damage or permanent distortion, the pressures occurring prior to pressure
relief, as well as pressures occurring due to normal overloads and external secondary short circuits.
3.2.6.3 GROUNDING PROVISIONS
A minimum of two tank mounted ground nuts fitted with a solderless type connector for AWG conductor
size No. 8 solid to No. 2 stranded shall be provided. One ground connector shall be on the tank sidewall,
near the top of the tank, below the primary bushing and the other shall be near the base, below the primary
bushing.
Figure 2
Rev. Sym. KK
9
368-105
3.2.7 LOSSES
The total losses of a transformer shall be the sum of the excitation losses and the load losses (I2R
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 Instructions to Bidders." Transformers
will be evaluated on excitation losses and I2R losses at the specified rates. If tested losses exceed
quoted losses but are within the tolerances of paragraph 9.3, ANSI C57.12.00-2000, 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 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 paragraph 9.3, ANSI C57.12.00-2000, 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.
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.
4.1.2 TEST REPORT
The manufacturer shall furnish to the purchaser certified copies of the results of loss tests prior to
payment. Copies of loss tests shall be sent to Standards and shall be attached to the invoice.
Unsigned copies are not acceptable even if accompanied by a signed cover letter.
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
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 ranges 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.
Rev. Sym. KK
10
368-105
4.3 NOT USED
4.4 TESTS
The tests to be performed and the test procedures required are specified in ANSI C57.12.20, ANSI C57.12.00,
and C57.12.90. Exception: 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.
Units shall be packaged on four-way universal pallets with 34 inch minimum opening and loaded on the truck for side
removal. The Supplier shall provide 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.
Rev. Sym. KK
11
368-105
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: 368 - 1 BC - X Y Z
II. THREE PHASE
Example #2 368 - 300 - XYZ
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
Transformer Class
00 = 13.2Y/7620 &
7620/13.2Y x
2400/4160 outside
pole
05 = 13.2Y7620 ESNA pole
20 = 13.2Y/7620 ESNA pad
Single Phase
Transformer Class
3 Phase
Pad
KVA
006 = 75 075 = 750
015 = 150 100 = 1000
030 = 300 150 = 1500
050 = 500
• All suffixes indicate 208Y/120 sec.
• For 480Y/277 sec., add 1 to XYZ
(ie. 007 would indicate a 75kVA with
480Y/277 sec.)
Rev. Sym. KK
12
368-105
APPENDIX B – Tank Coating Comparison
This Appendix is not intended to dictate requirements for items purchased under Specification 368-
105, but is included as an aid in comparing coatings for those manufacturers attempting to meet the
requirements of this design.
Tank coatings listed here are for reference only and shall not be considered as complete. Also, the
City of Fort Collins shall not be held responsible for patent infringements incurred through the use of
this information.
B.1 ARMORTEC, a fusion bonded vinyl resin having a minimum coating thickness of 15 mils.
B.2 Coal-tar Epoxy having a minimum thickness of 15 mils applied in two coats over a zinc rich
primer and overcoated with flow coat applied black enamel paint.
B.3 Electrostatically applied thermosetting polyester applied as follows:
1. Five Stage Wash - alkaline detergent, water rinse, phosphate treatment, water
rinse, and sealing rinse.
2. Delay Line - dry and cool.
3. Coat - Electrostatically coat with a thermoset- ting polyester.
4. Bake - Heat as recommended by polyester manufacturer to set polyester.
5. Cool.
6. Repeat Process - Repeat applicable steps of above process to obtain a minimum dry
build of 6 mils.
B.4 Ceilcote Flakeline 252 (minimum thickness 35 mils).
Rev. Sym. KK
13
368-105
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 manufacturer 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.
Cooper Power Systems All except 196 & 195
Howard Industries All
ABB All
Central Moloney 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.
Rev. Sym. KK
14
368-105
Transformer Loss Evaluation Form- AVERAGE LOSSES
City Order No. S/N
Manufacturer Invoice No.
KVA/Unit
LINE DESCRIPTION AMOUNT
(1) No. of units
(2) Average core losses
(3) Quoted core losses
(4) Excess average core losses:
line (2) less line (3)
(5) Penalty for excess average core losses:
line (1) x line (4) x $
6) Average copper losses
(7) Quoted copper losses
(8) Excess average copper losses:
line (6) less line (7)
(9) Penalty for excess average copper losses:
line (1) x line (8) x $
(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.
Rev. Sym. KK
15
368-105
Individual Transformer Loss Evaluation Form
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
line (7) ¸ line (6) x 100
(9) Tested copper losses
(10) Quoted copper losses _
(11) Excess copper losses
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 (13)
Date Prepared By: (Design Engineering)
Rev. Sym. KK
16
368-105
Special Conditions andSupplemental Instructions to Bidders
Applicable to Specification 368-105
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. Impedance volts in % at full load, high voltage to low voltage at 85°C.
2. No load and total losses at 85°C.
3. Protective tank coating specification.
4. A statement indicating compliance with our Specification without exception.
5. 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.
Failure to supply the above data shall constitute a basis for rejection of the bid.
B. Loss Evaluations
Loss penalties and loss evaluations will be based on the following values:
1. No load or excitation losses at $3.25/watt.
2. Load losses at $1.10/watt.
C. Shipping Terms
Ship F.O.B. point of destination, freight prepaid.
D. Terms of Payment
1. If escalation applies, the City of Fort Collins shall not be billed for escalation occurring after the promised
delivery date. Escalation charges shall be itemized on the invoice.
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.
4160 GRDY/2400
One bushing well 2-2½% 2-2½% 240/480 Three Eyebolt CP
*Reconnectable in field for 120/208 volt service
(1) CP = current-protecting (see para. 3.2.5.1); S = conventional; Internal - current limiting protection (see para. 3.2.5.1)
TBD = To be Determined
of use. NO IMPLIED WARRANTY OR MERCHANTABILITY OR OF FITNESS FOR PURPOSE SHALL
APPLY.
4. CHANGES IN LEGAL TERMS.
The Purchaser may make changes to legal terms by written change order.
5. CHANGES IN COMMERCIAL TERMS.
The Purchaser may make any changes to the terms, other than legal terms, including additions to or deletions
from the quantities originally ordered in the specifications or drawings, by verbal or written change order. If any
such change affects the amount due or the time of performance hereunder, an equitable adjustment shall be made.
6. TERMINATIONS.
The Purchaser may at any time by written change order, terminate this agreement as to any or all portions of the
goods then not shipped, subject to any equitable adjustment between the parties as to any work or materials then
in progress provided that the Purchaser shall not be liable for any claims for anticipated profits on the
uncompleted portion of the goods and/or work, for incidental or consequential damages, and that no such
adjustment be made in favor of the Seller with respect to any goods which are the Sellers standard stock. No such
termination shall relieve the Purchaser or the Seller of any of their obligations as to any goods delivered
hereunder.
7. CLAIMS FOR ADJUSTMENT.
Any claim for adjustment must be asserted within thirty (30) days from the date the change or termination is
ordered.
8. COMPLIANCE WITH LAW.
The Seller warrants that all goods sold hereunder shall have been produced, sold, delivered and furnished in strict
compliance with all applicable laws and regulations to which the goods are subject. The Seller shall execute and
deliver such documents as may be required to effect or evidence compliance. All laws and regulations required to
be incorporated in agreements of this character are hereby incorporated herein by this reference. The Seller
agrees to indemnify and hold the Purchaser harmless from all costs and damages suffered by the Purchaser as a
result of the Sellers failure to comply with such law.
9. ASSIGNMENT.
Neither party shall assign, transfer, or convey this order, or any monies due or to become due hereunder without
the prior written consent of the other party.
10. TITLE.
The Seller warrants full, clear and unrestricted title to the Purchaser for all equipment, materials, and items
furnished in performance of this agreement, free and clear of any and all liens, restrictions, reservations, security
interest encumbrances and claims of others.
11. NONWAIVER.
Failure of the Purchaser to insist upon strict performance of the terms and conditions hereof, failure or delay to
exercise any rights or remedies provided herein or by law, failure to promptly notify the Seller in the event of a
breach, the acceptance of or payment for goods hereunder or approval of the design, shall not release the Seller of
any of the warranties or obligations of this purchase order and shall not be deemed a waiver of any right of the
purchaser to insist upon strict performance hereof or any of its rights or remedies as to any such goods, regardless
of when shipped, received or accepted, as to any prior or subsequent default hereunder, nor shall any purported
oral modification or rescission of this purchase order by the Purchaser operate as a waiver of any of the terms
hereof.
12. ASSIGNMENT OF ANTITRUST CLAIMS.
Seller and the Purchaser recognize that in actual economic practice, overcharges resulting from antitrust
violations are in fact borne by the Purchaser. Theretofore, for good cause and as consideration for executing this
purchase order, the Seller hereby assigns to the Purchaser any and all claims it may now have or hereafter
acquired under federal or state antitrust laws for such overcharges relating to the particular goods or services
purchased or acquired by the Purchaser pursuant to this purchase order.
13. PURCHASERS PERFORMANCE OF SELLERS OBLIGATIONS.
If the Purchaser directs the Seller to correct nonconforming or defective goods by a date to be agreed upon by the
Purchaser and the Seller, and the Seller thereafter indicates its inability or unwillingness to comply, the Purchaser
may cause the work to be performed by the most expeditious means available to it, and the Seller shall pay all
costs associated with such work.
The Seller shall release the Purchaser and its contractors of any tier from all liability and claims of any nature
resulting from the performance of such work.
This release shall apply even in the event of fault of negligence of the party released and shall extend to the
directors, officers and employees of such party.
The Seller's contractual obligations, including warranty, shall not be deemed to be reduced, in any way, because
such work is performed or caused to be performed by the Purchaser.
14. PATENTS.
Whenever the Seller is required to use any design, device, material or process covered by letter, patent, trademark
or copyright, the Seller shall indemnify and save harmless the Purchaser from any and all claims for infringement
by reason of the use of such patented design, device, material or process in connection with the contract, and shall
indemnify the Purchaser for any cost, expense or damage which it may be obliged to pay by reason of such
infringement at any time during the prosecution or after the completion of the work. In case said equipment, or
any part thereof or the intended use of the goods, is in such suit held to constitute infringement and the use of said
equipment or part is enjoined, the Seller shall, at its own expense and at its option, either procure for the
Purchaser the right to continue using said equipment or parts, replace the same with substantially equal but
non-infringing equipment, or modify it so it becomes non-infringing.
15. INSOLVENCY.
If the Seller shall become insolvent or bankrupt, make an assignment for the benefit of creditors, appoint a
receiver or trustee for any of the Sellers property or business, this order may forthwith be canceled by the
Purchaser without liability.
16. GOVERNING LAW.
The definitions of terms used or the interpretation of the agreement and the rights of all parties hereunder shall be
construed under and governed by the laws of the State of Colorado, USA.
The following Additional Conditions apply only in cases where the Seller is to perform work hereunder,
including the services of Sellers Representative(s), on the premises of others.
17. SELLERS RESPONSIBILITY.
The Seller shall carry on said work at Seller's own risk until the same is fully completed and accepted, and shall,
in case of any accident, destruction or injury to the work and/or materials before Seller's final completion and
acceptance, complete the work at Seller's own expense and to the satisfaction of the Purchaser. When materials
and equipment are furnished by others for installation or erection by the Seller, the Seller shall receive, unload,
store and handle same at the site and become responsible therefor as though such materials and/or equipment
were being furnished by the Seller under the order.
18. INSURANCE.
The Seller shall, at his own expense, provide for the payment of workers compensation, including occupational
disease benefits, to its employees employed on or in connection with the work covered by this purchase order,
and/or to their dependents in accordance with the laws of the state in which the work is to be done. The Seller
shall also carry comprehensive general liability including, but not limited to, contractual and automobile public
liability insurance with bodily injury and death limits of at least $300,000 for any one person, $500,000 for any
one accident and property damage limit per accident of $400,000. The Seller shall likewise require his
contractors, if any, to provide for such compensation and insurance. Before any of the Sellers or his contractors
employees shall do any work upon the premises of others, the Seller shall furnish the Purchaser with a certificate
that such compensation and insurance have been provided. Such certificates shall specify the date when such
compensation and insurance have been provided. Such certificates shall specify the date when such compensation
and insurance expires. The Seller agrees that such compensation and insurance shall be maintained until after the
entire work is completed and accepted.
19. PROTECTION AGAINST ACCIDENTS AND DAMAGES.
The Seller hereby assumes the entire responsibility and liability for any and all damage, loss or injury of any kind
or nature whatsoever to persons or property caused by or resulting from the execution of the work provided for in
this purchase order or in connection herewith. The Seller will indemnify and hold harmless the Purchaser and any
or all of the Purchasers officers, agents and employees from and against any and all claims, losses, damages,
charges or expenses, whether direct or indirect, and whether to persons or property to which the Purchaser may
be put or subject by reason of any act, action, neglect, omission or default on the part of the Seller, any of his
contractors, or any of the Sellers or contractors officers, agents or employees. In case any suit or other
proceedings shall be brought against the Purchaser, or its officers, agents or employees at any time on account or
by reason of any act, action, neglect, omission or default of the Seller of any of his contractors or any of its or
their officers, agents or employees as aforesaid, the Seller hereby agrees to assume the defense thereof and to
defend the same at the Sellers own expense, to pay any and all costs, charges, attorneys fees and other expenses,
any and all judgments that may be incurred by or obtained against the Purchaser or any of its or their officers,
agents or employees in such suits or other proceedings, and in case judgment or other lien be placed upon or
obtained against the property of the Purchaser, or said parties in or as a result of such suits or other proceedings,
the Seller will at once cause the same to be dissolved and discharged by giving bond or otherwise. The Seller and
his contractors shall take all safety precautions, furnish and install all guards necessary for the prevention of
accidents, comply with all laws and regulations with regard to safety including, but without limitation, the
Occupational Safety and Health Act of 1970 and all rules and regulations issued pursuant thereto.
Revised 11/91