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HomeMy WebLinkAboutBID - 6106 LP TRANSFORMER 75KVA SUBMERSIBLECITY OF FORT COLLINS LIGHT AND POWER Bid Proposal BID 6106 LP Transformer 75kVA Submersible SPECIFICATION NUMBERS BID DATE: 2:00 P.M. (Our clock ) June 9, 2008 Financial Services Purchasing Division 215 N. Mason St. 2nd Floor PO Box 580 Fort Collins, CO 80522 970.221.6775 970.221.6707 fcgov.com/purchasing Rev 10/20/07 CITY OF FORT COLLINS INVITATION TO BID BID # 6106 LP Transformer 75 kVA Submersible 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), June 9, 2008. 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 Bids may be withdrawn up to the date and hour set for closing.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, 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. Rev 10/20/07 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 Rev 10/20/07 FIRM NAME:_____________________________ CITY OF FORT COLLINS BID PROPOSAL BID NO. BID DATE: 2:00 p.m. (Our clock) June 9, 2008 WE HEREBY ENTER OUR BID FOR THE CITY OF FORT COLLINS' REQUIREMENTS FOR LP Transformer 75kVA Submersible PER THE BID INVITATION AND ANY REFERENCED SPECIFICATIONS. QUANTITY: DESCRIPTION: 16 Ea. TRANSFORMER, 75 KVA SUBMERSIBLE, SINGLE PHASE WITH OVERCURRENT PROTECTION PER SPECIFICATION. ONE COVER MOUNTED SEPARABLE INSULATED LOAD BREAK HIGH VOLTAGE BUSHING WELL, THREE COVER MOUNTED STUD SECONDARY BUSHINGS. HIGH VOLTAGE RATING: 13200 GRDY/7620, LOW VOLTAGE RATING: 240/120. PER SPECIFICATION #368-110-161, REVISION E $_______________________Ft. _____________________Total Mfr.____________________ Mfr. #_______________________ Delivery in Weeks:______________________________________ The items being bid meet or exceed the attached specifications. Yes_____ No_____. If not, please list exceptions (specifying paragraph reference number) on a separate sheet of paper and attach to your bid documents. *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. Rev 10/20/07 The City of Fort Collins reserves the right to split the bid in whatever percentages are most advantageous to the City. Future orders of__________ 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. 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: THE CITY OF FORT COLLINS UTILITIES Electric Department P.O. Box 580 Fort Collins, CO 80522 SPECIFICATION NO: 368-110 TITLE: Single Phase Submersible Cover Mount Transformer APPROVED BY: Kraig Bader Standards Engineering Manager ORIGINATED: June 1999 LAST REVISED: 28 November 2006 Rev Sym: E 2 368-110 REVISION DESCRIPTIONS REVISION DESCRIPTION APPROVED REVISION A • Revised tank material in section 6 Tim Sagen Bill Bray 12/15/2000 REVISION B • Rewrote specification with reference to IEEE submersible specification C57.12.23. • Overcurrent protection changed: Secondary breaker in conjunction with under-oil full range current limiting primary fuse. • Only one thermal design is specified now. Previous revision allowed two thermal designs, but did not indicate a preference. Kraig Bader 9/20/2005 Revision C • Corrected stock numbers in Table 1. • Amended paragraph 7.1 -1 to clarify the alloys specified for the construction of the transformer. • Section 7.4: Removed requirement for tank drain (1.00” NPT flush coupling with brass pipe plug). Tank drain increases the vulnerability of the tank to rust, and subsequent leaking in a submersible environment. • Section 7.4: Amended statement regarding lifting eyes – removed requirement for lifting eyes to be located on ”the front and backside of” the transformer. • Removed statement in paragraph 8 requiring “Bayonet warning decals located near bayonet fuse.” As design progressed, the decision to use secondary breaker in conjunction with full range CL fuses removes the need for bayonet warning labels. • Corrected secondary voltage rating in Section 5, Table 1 from 120/240 to 240/120. (120/240 rated units require 4 LV bushings , and we specify 3 LV bushings.) Kraig Bader 11/17/05 Revision D • Revised Approved Manufacturer Table to confirm receipt and inspection of prototype units manufactured in conformance with this specification. Kraig Bader 4/10/06 Revision E • Revised full-range current limiting fuse sizing in paragraph 6.2 to reflect the derating from the in-air application to the under-oil application of the Transguard FX fuses. Kraig Bader 11/28/2006 Rev Sym: E 3 368-110 TABLE OF CONTENTS REVISION DESCRIPTIONS.........................................................................................................................................2 1 Scope.........................................................................................................................................................................4 2 Applicable Documents ...............................................................................................................................................4 3 Kilovolt-ampere ratings ..............................................................................................................................................4 4 bushings and Terminals.............................................................................................................................................4 4.1 HIGH VOLTAGE TERMINALS............................................................................................................................4 4.2 LOW VOLTAGE TERMINALS ............................................................................................................................5 5 Electrical Requirements.............................................................................................................................................5 6 Overcurrent protection ...............................................................................................................................................6 6.1 CURRENT PROTECTING (CP)..........................................................................................................................6 6.2 FUSING...............................................................................................................................................................6 7 tank design.................................................................................................................................................................6 7.1 TANK MATERIAL................................................................................................................................................6 7.2 TANK THICKNESS .............................................................................................................................................6 7.3 TANK DIMENSIONS...........................................................................................................................................6 7.4 TANK-MOUNTED ACCESSORIES ....................................................................................................................7 7.5 TANK COATINGS...............................................................................................................................................7 8 Markings ....................................................................................................................................................................7 9 Losses........................................................................................................................................................................7 10 QUALITY ASSURANCE ..........................................................................................................................................8 10.1 GENERAL .........................................................................................................................................................8 10.1.1 RESPONSIBILITY FOR INSPECTION ......................................................................................................8 10.1.2 TEST REPORT...........................................................................................................................................8 10.2 TEST CONDITIONS .........................................................................................................................................8 10.2.1 REFERENCE TEMPERATURE .................................................................................................................8 10.2.2 TOLERANCE ON IMPEDANCE VOLTAGE...............................................................................................8 10.2.3 TOLERANCE ON IMPEDANCE VOLTAGE ON A TAP.............................................................................8 10.3 TESTS...............................................................................................................................................................8 11 Preparation for delivery............................................................................................................................................8 APPENDIX B – Tank Coating Comparison ................................................................................................................10 APPENDIX C – Approved Manufacturers ..................................................................................................................11 Transformer Loss Evaluation Form- AVERAGE LOSSES .........................................................................................12 Individual Transformer Loss Evaluation Form............................................................................................................13 Special Conditions andSupplemental Instructions to Bidders....................................................................................14 Rev Sym: E 4 368-110 Specification for Single Phase Submersible Cover Mount Transformer 1 SCOPE This specification establishes the minimum requirements for single phase, 60 hertz, mineral oil filled, self cooled, vault type distribution transformers purchased by the City of Fort Collins Electric Department. 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. The transformer tank and all external appurtenances shall be of corrosion-resistant material, unless they are otherwise rendered corrosion resistant. 2 APPLICABLE DOCUMENTS Unless otherwise stated in this Specification, all transformers shall be new and shall conform to the American National Standard Requirements for Underground Type, Self Cooled, Single Phase Distribution Transformers, ANSI C57.12.23 - 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. The following standards for distribution, power, and regulating transformers and shunt reactors form a part of this Specification: • General Requirements C57.12.00 • Underground Type Distribution Transformers C57.12.23 • 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 KILOVOLT-AMPERE RATINGS Kilovoltampere ratings shall be continuous and based on, but not exceeding, an average winding temperature rise of 55 ˚C and a hottest-spot temperature rise of 70 ˚C. The temperature rise of the insulating oil shall be measured near the top of the tank and shall not exceed 55 ˚C. The transformers shall have a temperature-rise insulation system of 65 ˚C. The kilovoltampere ratings for transformers conforming to this standard shall be suitable for continuous operation at the rated kilovoltamperes, provided that the temperature of the cooling air (enclosure ambient temperature) does not exceed 50 ˚C and the average temperature of the cooling air does not exceed 40 ˚C for any 24-hour period. KVA ratings shall be in accordance with Table-1. 4 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. 4.1 HIGH VOLTAGE TERMINALS The number and electrical characteristics of the high voltage terminals required are specified in Table 1. High- voltage bushing wells shall be top-mounted 200A load-break interface bushings rated for 8.3/14.4 kV Rev Sym: E 5 368-110 maximum continuous voltage, and 95kV BIL and full wave crest voltage in accordance with ANSI/IEEE Standard 386. It is not required that bushing well inserts be supplied with the transformers. On phase-to-ground transformers, the H2 end of the high-voltage winding shall be connected to the tank internally. This connection shall be independent of all other electrical connections. 4.2 LOW VOLTAGE TERMINALS Terminal type and number shall be in accordance with Table 1 of this specification, and shall be positioned for additive polarity per ANSI C57.12.23 - 2000. Terminals shall be welded Central Moloney 5/8” threaded copper stud-type bushings with external epoxy. The low voltage terminals shall have a BIL of 30kV. Terminals shall be singly mounted on the top at 5.5 to 7.5 inch center to center spacing. Stud type terminals shall be Central Moloney bushings with a 5/8” copper stud. Bushings shall have dimensions in accordance with Figure 1 of this specification, with a bushing sealing surface diameter no greater than 1.38”. All non- metallic components of the terminals shall be manufactured of a material resistant to ultra-violet degradation. Mounting hardware shall be corrosion resistant. Figure 1 – Secondary Bushing Dimensions The low-voltage neutral (X2) connection of the winding shall be made to the tank or cover but not to the core clamp. When a fully insulated terminal is used for this low-voltage neutral connection, it shall be externally identified as being internally connected to the tank or cover. 5 ELECTRICAL REQUIREMENTS Table 1 HIGH VOLTAGE LOW VOLTAGE TAPS STOCK NO. 368-110 – SERIAL KVA % Z RATING TERMINAL(S) ABOVE BELOW RATING TYPE AND NUMBER OF TERMINALS PROTECTION TYPE (1) - 25 1.77 to 2.16 13200 GRDY/7620 One bushing well None None 240/120 Three CU stud CP -150 50 1.77 to 2.16 13200 GRDY/7620 One bushing well None None 240/120 Three CU stud CP -161 75 1.77 to 2.16 13200 GRDY/7620 One bushing well None None 240/120 Three CU stud CP (1) CP = current-protecting (see section 6, Overcurrent Protection); S = conventional; Fusing - current limiting protection (see section 6, Overcurrent Protection) TBD = To be Determined Max. 1.38” dia. Sealing Surface 5/8” Threaded Copper Stud Rev Sym: E 6 368-110 6 OVERCURRENT PROTECTION 6.1 CURRENT PROTECTING (CP) Current-protecting (CP) when specified in Table 1 shall include: • Full range, current limiting, under-oil primary fuse (see paragraph 6.2). • Low voltage (secondary) breaker • Signal light (if practical for particular design) • Emergency control handle 6.2 FUSING Internally mounted 8.3kV rated under-oil full range current limiting fuse which shall operate in conjunction with a secondary breaker. kVA Current Limiting Fuse 50 25 Amp Hi-Tech TransGuard FX 75 40 Amp Hi-Tech TransGuard FX 7 TANK DESIGN 7.1 TANK MATERIAL Tank, cover and bottom shall be stainless steel manufactured with one of the following alloys: 1. 409 SST are preferred for the tank, cover and bottom, but will accept designs that utilize 400CB SST, or 304L SST if they are specifically approved by Utilities Electric Engineering Standards. 7.2 TANK THICKNESS The tank shall be of sufficient strength to withstand a static internal pressure of 50 kPa gauge (7.25 psig) without permanent distortion and 140 kPa gauge (20.3 psig) without rupturing. 7.3 TANK DIMENSIONS Figure 2 (below) shows maximum outside tank dimension envelope. Figure 2 Maximum Clearance Dimensions (inches) kVA A B C* 50, 75 27 33 44 * C dimension is measured to the top of bushing well insert (insert is provided by Utilities) Rev Sym: E 7 368-110 7.4 TANK-MOUNTED ACCESSORIES The following tank-mounted accessories shall be provided: • (1) Tomko 1720K-1 Or Qualitrol 202-014-02 submersible stainless steel pressure relief device located on cover • (1) Tomko LG35 or Harco HLG-1065 sight gauge/oil level coupling located on cover • (2) 1.00” NPT fill couplings located on cover with brass pipe plugs • (2) ½” - 13 SST ground pads centered on tank below primary bushing 7” from top and 7” from base, respectively • (1) ½” - 13 SST ground pad on top near primary bushing • (1) Stainless steel pocket type parking stand for a loadbreak stand-off device • (2) Lifting hooks opposite each other, welded on the tank near the top, positioned to allow lifting strap clearance from the bushings. • (1) Stainless steel cover-mounted instruction nameplate 7.5 TANK COATINGS An adequate tank coating for underground vault application shall be provided. Appendix B is provided as a reference for comparing coating requirements. Fort Collins Utilities Electric Department, Engineering Division, shall be the only authority regarding the adequacy of proposed coatings. The final color shall be ANSI compliant light gray paint. 8 MARKINGS • X1, X2 & X3 stainless steel identification tags with black lettering • “X2 Int. Gnd” stenciled in black on cover • Cover mounted stainless steel nameplate instruction nameplate conforming to 5.12 of ANSI C57.12.00- 2000, Nameplate A. On the nameplate or a label affixed near it, the manufacturer shall indicate that the dielectric fluid contains less than 1 ppm PCB. • Temporary serial/shipping card attached to tank lift-eye 9 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 $ = [# 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. Rev Sym: E 8 368-110 10 QUALITY ASSURANCE 10.1 GENERAL 10.1.1 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. 10.1.2 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. 10.2 TEST CONDITIONS Unless otherwise specified, testing required by Section 4.4 shall be conducted under the following conditions. 10.2.1 REFERENCE TEMPERATURE The reference temperature to which losses, impedance, regulation, and efficiency are corrected shall be 85°C. 10.2.2 TOLERANCE ON IMPEDANCE VOLTAGE 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. 10.2.3 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. 10.3 TESTS The tests to be performed and the test procedures required are specified in 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. 11 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 two-way pallets or four-way universal pallets with 34 inch minimum opening (to accommodate minimum fork spacing) 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: E 9 368-110 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 = 13.2Y/7620 ESNA pole or 10 = 13.2Y/7620 ESNA Submersible 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: E 10 368-110 APPENDIX B – TANK COATING COMPARISON This Appendix is not intended to dictate requirements for items purchased under Specification 368-110, but is included as an aid in comparing coatings for manufacturers attempting to meet the requirements of this design. Tank coatings listed here are for reference only and shall not be considered as complete. The City of Fort Collins Utilities 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 thermosetting 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: E 11 368-110 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. Approved manufacturers must have constructed and submitted prototype units for inspection and deemed satisfactory by the Fort Collins Utilities Electric Department. APPROVED MANUFACTURERS Howard Industries 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 Utilities to gain some experience with the manufacturer's product. Should a conditionally approved manufacturer be the evaluated low bidder, Utilities reserves the right to award all, part, or none of the order to them, dependant upon the current needs of the Utility for that item or items. CONDITIONALLY APPROVED MANUFACTURERS ABB Central Moloney General Electric Rev Sym: E 12 368-110 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, Utilities Electric will either reject it, include it on these averages, or calculate losses using the Individual Transformer Losses Evaluation Form, whichever is most favorable to Utilities Electric. Rev Sym: E 13 368-110 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: E 14 368-110 SPECIAL CONDITIONS ANDSUPPLEMENTAL INSTRUCTIONS TO BIDDERS Applicable to Specification 368-110 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.