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Home My WebLink About194201 STUART C IRBY - PURCHASE ORDER - 6606113Date: 09122/06 City of Fort Collins City of Fort Collins Page Number: i Purchase Order Number: 6606113 Delivery Date: 04/23/07 Buyer: DICK,OPAL Purchase Order number must appear on invoices, packing lists, labels, bills of lading, and all correspondence. Note: Line Qty UOM Description Unit Price Extended Price 1 5 EA T3000076; transformer 750 Kva pad mount; 3phs T3000076 YARD TRANSFORMER, 750 kVA PAD -MOUNTED COMPARTMENTAL TYPE, THREE PHASE DISTRIBUTION WITH SEPARABLE INSULATED LOAD BREAK HIGH VOLTAGE CONNECTORS. HIGH VOLTAGE RATING: 13200 GRDY17620. LOW VOLTAGE RATING: 480Y(277. SERIAL NUMBER 076 TO BE IN ACCORDANCE WITH SPECIFICATION #368-300-076, REVISION MM, Bid #5996 MFR.COOPER GUARANTEED NO LOAD LOSS - 1176 GUARANTEED FULL LOAD LOSS - 4198 GUARANTEED TOTAL LOAD LOSS - 5374 16,998.770 84,993.85 REV. SYM: MM 3.2.2.4 HIGH VOLTAGE TAPS A no-load tap changer with external operating handle shall provide two 2 % full capacity taps above and below normal. The operating handle shall be mounted in the primary compartment. 3.2.2.5 BUSHING WELLS AND TERMINALS 3.2.2.6.1 The number, location, and arrangement of bushing wells, terminals and parking stands shall be as shown in Fig. 1 and Fig. 5 of this specification. All low -voltage bushings and high -voltage wells shall be externally clamped and shall have leads of sufficient length to allow them to be changed without removing he cover. Welded bushings and wells are expressly prohibited. 3.2.2.5.2 High -voltage bushing wells shall be 200A load -break interface 8,3/14.4 kV bushings in accordance with ANSMEEE Sid. 386. 3.2.2.5.3 Low voltage bushing arrangement and spacing shall be 'staggered", as shown in Fig. 5 of this Specification. 3.2.2.5.4 The low -voltage neutral shall be a fully insulated bushing. A ground pad shall be provided on the outer surface of the tank and a removable copper ground strap shall be provided and connected between the low -voltage neutral bushing and the ground pad. 3.2.2.5.5 The high -voltage neutral shall be connected to the low -voltage neutral internally with provision for opening this connection for testing. 3.2.2.6 ACCESSORY CABINET 3.2.2.6.1 The accessory cabinet shall consist of a high -voltage and low- voltage compartment generally constructed in accordance with applicable ANSI specifications and dimensioned in accordance with Fig. 1 of this Specification. 3.2.2.6.2 Cabinet doors shall be hinged, removable, and lockable. Stainless hinge pins shall be provided. 3.2.2.7 ACCESSORY EQUIPMENT Accessory equipment shall be provided in accordance with Table 1A and the following details: 3.2.2.7.1 Suitable jack bosses or equivalent jacking facilities shall be provided on the tank. Vertical clearance for a jack shall be 1'/2 inches minimum, 3Y2 inches maximum. 3.2.2.7.2 The transformer base shall be arranged for rolling in two directions: Parallel to and at right angles to the centerline of the high -voltage bushings, 3.2.2.7.3 Four lifting lugs shall be provided. These lugs shall be adequate strength and size and arranged on the tank to provide a suitable lift for the completely assembled unit. 3.2.2.7.4 The base of the assembly shall be provided with suitable means for mounting the unit on the pad. An internal flange shall be provided at the base of the accessory compartment to provide means for mounting the unit on the pad. (Fig. 1). 3.2.2.7.5 Terminal designations are shown in Figure 1. The identification of terminal connections shall be shown on the instruction nameplate. Instruction nameplate shall be corrosion resistant, located in the low -voltage compartment, and shall be readable with cables in place. Where the nameplate is mounted on a removable part, the manufacturer's name and transformer serial number shall be permanently affixed to a non -removable part. Instruction nameplate shall contain the information specified in ANSI C57.12.00-2000, paragraph 5.12. In addition, either on the nameplate or label affixed near it, the manufacturer shall indicate that the dielectric fluid is non -PCB. 8 368-300 REV. SYM: mm 3.2.2.7.6 An automatic pressure relief device shall be located within the compartment. This device shall meet the following requirements: • '/: NPT or larger male Inlet Port. • Exposed parts of weather and corrosion resistant materials. • Non -deteriorating gasket and o-ring material. • Manual pull ring able to withstand 25 pound force minimum. • Body able to withstand 100 pound force minimum. • Bug shield. • Cracking pressure of 10 t 2 psig. • Resealing pressure of 6 psig minimum. • Zero leak rate from resealing pressure to —8 psig. • Minimum flow rate of 35 SUM at 15 psig. 3.2.2.8 OIL PRESERVATION Transformers shall be of sealed -tank construction. Sealed -tank construction is that which seals the interior of the tank from the atmosphere, and in which the gas plus the oil volume remains constant. The transformer will remain effectively sealed for a top -oil temperature range of —32°C to 105°C. 3.2.2.9 TANKS The tank shall be domed or sloped to shed water and shall be of sufficient strength to support a minimum of 500 lbs. Construction of the tank shall be in accordance with ANSI C57.12.26-1992, Section 7, except bolted cover is preferred. 3.2.2.9.1 If main cover is welded, adequate handhole(s) shall be provided. Handholes shall be concealed. Bolted -on covers shall be adequately gasketed and tamperproof. Main cover bolts may be exposed; however, where cover bolts are exposed, the comer bolts shall be welded or otherwise rendered tamperproof. 3.2.2.9.2 Tank grounding provision shall be in accordance with paragraph 7.6A of ANSI C52.12.26-1992. 3.2.2.9.3 Locking bolts shall be pentahead style. 3.2.2.10 OVERCURRENT PROTECTION Overcurrent protection shall consist of a single element current sensing bay-o-net fuse link in series with an ELSP current limiting backup fuse. Fuses shall be sized as shown in Table 2: Table 2 — Fusina Reautrements Exputifibn` Use Continuous t;airsnt'Llmitlttg Fuse Stock kVfA Cutroht Rating Conan Cuwrent Rating Number C Part Nu" iA krt'Number" 368-300-008 75kVA 10A 30A 368-300-009 4000353C06 3544030M61M 368-300-015 150kVA 15A 40A 368-300-016 4000353C08 3544040M61M 368-300-030 300kVA 25A 65A 368-300-031 4000353C10 3544065M61 M 368-300-051 500kVA 40A 100A 4000353C12 3544100M71M 368-300-075 750kVA 66A 125A 368-300-076 750kVA (4000353C14) (3544125M71M) 368.300-100 1000kVA 368-300-101 1000kVA 368-300-151 MOM 140A 25OA : Parallel 125A fuses 368-300-201 2000kVA 4000353C17 3544125M71M 368-300-251 2500kVA 125A Hi -Amp OL Link C05C8 250A : Parallel 125A fuses 3544125M71M Fuse shall be as specified in the table above or shall be an equivalent as approved in writing by Electric Standards Engineering. 9 368-300 REV. SYM: MM 3.2.2.11 COMPONENTS FOR LOOPED PRIMARY The minimum current -carrying capability of components for the looped primary cable system shall be 200 amperes (continuous) and 10,000 amperes symmetrical (momentary). 3.2.2.12 AUDIBLE SOUND LEVEL The audible sound level shall be in accordance with NEMA Standard TR1. 3.2.2.13 BASE PLAN The base plan of a completely assembled unit shall be such that it can be installed on a pad of the dimensions shown in Fig. 6 of this specification. 3.2.2.14 PAINT 3.2.2.14.1 Surfaces to be painted shall be blast cleaned (commercial blast) to provide a clean dry surface free of dirt, dust, chalk, loose paint, rust, grease and any other contaminants. 3.2.2.14.2 EEI "Finishing Guidelines* specification shall apply. Finish coat shall be Desert Tan, Munseli #10YR6.0/3.0, glossy. 3.2.2.15 SAFETY LABELS The manufacturer shall not apply NEMA 260 Safety Labels. The Purchaser will apply custom warning labels after delivery. 3.2.2.16 ANGULAR DISPLACEMENT: Per Fig. 10(b) of ANSI C57.12.26-1992. 10 368-300 I BELOW Q JH I I 4.5 MIN + _ 5 X1 3rt 27.0 4.5 .a. 6. 6.b 4. II 36A MIN• FLANGE 3/P MIN 11n•MAK KVA RATINGS LOW VOLTAGE RATINGS COMPARTMENT DIMENSIONS (MINIMUM) BUSHING HEIGHT A' B 75-150 ALL 23.25 27 225-500 ALL 28 31 4aGYJ277.208Y/120 28 46 ;7504000 00 480Y/227 28 48 NOTE'. Denotes inside dimension!. •• See Fig.5 AN dimensions in (Inches). Maximum denensions shall allow one Inch tleeranco from edge of pad (Fig. 6). Figure 1 - Accessory compartment & Bushing Dimensions (Config. 1) REV. SYM: MM 11 368-300 >ntN— _CL TANK SURFACE i r TANK SURF ACE I � i i I I ! I J A.75 f19 _A INSIDE Cable Ameecwry Parking Stand Figure 1A — Cable Accessory Parking Stand Detail Figure 2 (Config. 2) - DELETED 7/92 Figures 3 & 4 - DELETED 11/00 Ref. now to: ANSI C57.12.26 - 1992 figures 9(a) & 9(b) REV. SYM: mm 12 368-300 A A A 4.0" MIN MIN CL X1 , _f X3 B CL rr Tr � XO X2 REV. SYM: MM 6" RADIUS TYPICAL 3 PLACES KVA RATINGS LOW VOLTAGE A B RATINGS 75-150 ALL 4.75 8 225-500 ALL 6 8 750-2500 480/2770 208Y/120 6 10 Figure 5 - Staggered Low - Voltage Bushing Arrangement (all dimensions minimum inches). NOTE: An area having a 6 inch radius around each bushing shall remain clear of obstructions such as gauges, etc. 13 368-300 REV. SYM: MM KVA SERIAL PAD DIMENSIONS (inches) A 8 C D E F 75 -006 thru -009 75 55 40 21 15 61 150 -015 75 55 40 21 15 61 150 -016 75 55 40 21 15 61 300 -030 75 55 40 21 15 61 300 -031 75 55 40 21 15 61 500 -050 75 55 40 21 15 61 500 -051 75 55 40 21 15 61 750 -076, -075 85 72 49 23 15 67 1000 -101,-100 85 72 49 23 15 67 1500 -151 101 87 51 23 15 76 2000 -201 107 88 51 23 15 79 2500 -251 107 88 51 23 15 79 Fig. 6 - Pad Dimensions 14 368-300 REV. SYM: mm TABLE 1A ACCESSORY EQUIPMENT ACCESSORY KVA 75-150 300 500-2800 Tap changer handle in HV compartment X X X Instruction nameplate in LV compartment X X X Jacking provisions X X X Provisions for rolling in two directions X X X Lifting lugs X X X Provisions for mounting on pad X X X Arrester mounting provisions Grounding provisions in both compartments X X X V oil drain plug X V oil drain valve with sampling device X X Upper filer press and filling plug (or cap) (1") X X X Provisions for oil gauge X Provisions for pressure -vacuum gauge X X Oil gauge X Thermometer X X X Secondary CT mounting holes (4 holes on 4 31W x 5 5J8" centers) X X X Manuallautomatic pressure relief valve X X X 15 366-300 REV. SYM: MM 3.3 SPECIFIC REQUIREMENTS FOR DESIGN OF RADIAL -FEED Units 3.3.1 FUNCTIONAL DESCRIPTION The transformer shall be a three phase, pad mounted, radial feed safe break, "deadfronY type for use on a 13.8 kV grounded "Y" distribution system. 3.3.2 DESIGN AND CONSTRUCTION The requirements for radial -feed transformers shall be the same as those of loop -feed with the following exceptions: 3.3.2.1 RATINGS Table 3 - Radial -Feed Transformer Ratinas Stock No. WA LOW Volta Impedance 13.. hin T /CQnfl . High Volta a Low Voltage 368-300- 006 75 208Y/120 1.9% 0 06 368-300- 007 75 480Y/277 1.9% 0 m6 ® Per Figures 5A, & 7 of ANSI C57.12.26-1992 (In -Line) EXCEPTION: high voltage bushings shall be 32 - 36 inches above the base of the transformer O Figures 9(a) & 9(d) of ANSI C57.12.26 -1992 (stud with 4-hole pad) 6 Figure 8(9) of ANSI C57.12.26-1992 (Staggered) 3.3.2.2 ACCESSORY CABINET The accessory cabinet shall be dimensioned in accordance with Fig. 7 of ANSI C57.12.26-1992. 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 all tests prior to payment. Copies shall be sent to the Design Section as well as with the invoice. Unsigned copies are not acceptable even if accompanied by a signed cover letter. The Quality Control Manager shall review and sign each test report. 4.2 TEST CONDITIONS Unless otherwise specified, testing defined in Section 4.6 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 Tolerance shall be as specified in ANSI C57.12.00. 16 368-300 REV. SYM: MM 4.2.3 TOLERANCE ON IMPEDANCE VOLTAGE ON A TAP The percent departure of tested impedance voltage on any tap from tested impedance voltage at rated voltage shall not be greater than the total tap voltage range expressed as a percentage of the rated voltage. 4.3 FUNCTIONAL TESTS Functional tests shall consist of those tests and related requirements as cross referenced in Table 4 and shall be performed on each unit, except Temperature and Noise Tests which shall be performed on one unit of each design (KVA) per order. Table 4 - Functional Tests TEST TEST PARAGRAPH REQUIREMENT OR REFERENCE Examination Of Product 4.6 3.0 3.1 3.2 3.3(This specification) Ratio 4.6 ANSI C57.12.00 Section 8 Polarity And Phase Relation 4.6 ANSI C57.12.00 Section 8 Excitation Loss 4.6 ANSI C57.12.00 Section 8 Excitation Current 4.6 ANSI C67.12.00 Section 8 Impedance & Load Loss 4.6 ANSI C57.12.00 Section 8 Temperature Tests' 4.6 ANSI C57.12.00 Section 8 Dielectric Tests 4.6.1 3.2.2.2 is specification) Impulse Tests 4.6.2 3.2.2.2(This specification) Leak Testing 4.6.3 3.2.2.8 & 3.2.2.9(This specification) Noise Testing* 1 4.6.4 1 3.2.2.12(This specification) *One unit per design per order. 4.4 TEST METHODS — FUNCTIONAL TESTS Each completed unit shall be inspected to determine compliance with respect to dimensions, material, workmanship, construction and marking, and routine tests on all units shall be made as specified in Section 8 of ANSI Standard C57.12.00, and in ANSI Standard C57.12.90. In addition to routine tests, the following test requirements and/or modifications shall apply. 4.4.1 DIELECTRIC TESTS Induced and applied potential Dielectric Tests shall be performed in accordance with ANSI C57.12.00 and C57.12.90. The low voltage windings shall have a test potential to ground of 10,000 volts for one minute. The test potential between high voltage windings shall be 34,000 volts for one minute. 4.4.2 IMPULSE TESTS ANSI Standard Impulse Tests shall be performed. Full Wave Impulse Test shall use a 1.5 x 50 microsecond wave. 4.4.3 LEAK TESTING The transformer tank shall be filled with oil and tested for air and oil leaks under (1) 4 psig vacuum for % hour, (2) 7 psig pressure for 24 hours in the sequence indicated. An alternate method of leak testing may be performed by injecting halogen gas under 10 psig and detecting leaks through the use of a halogen detector. (Note, the automatic/manual pressure relief device must be removed for this test). 4.4.4 NOISE TESTING Noise testing shall be conducted in accordance with applicable NEMA Standards. 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 fully pelletized in four-way universal pallets with 28" minimum openings to facilitate handling from any side. Pallets shall be independent of the transformer. The Supplier shall give 24-hour notice prior to delivery for any shipments where an individual transformer weighs over 4,000 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. 17 368-300 Date: 09/22106 City of Fort Collins City of Fort Collins Page Number: 2 Purchase Order Number: 6606113 Delivery Date: 04123107 Buyer: DICK,OPAL Purchase Order number must appear on invoices, packing lists, labels, bills of lading, and all correspondence. Note: Line Qty UOM Description ""'IMPEDANCE MUST TEST ABOVE 5.32`... ` DELIVERY: 30 WEEKS ARO City of Fort III s Director of Purchasing and Risk Management This order Is valid over $2000 unless signed by James B. O'Neill II, CPPO, FNIGP Unit Price Extended Price Total $84,993.85 City of Fort Collins Accounting Department PO Box 580 Fort Collins, CO 80522-0580 City of Fort Collins Purchasing, PO Box 580, Fort Collins, CO 80522-0580 REV. SYM: MM 6. DEFINITIONS AND ABBREVIATIONS • Vendor or Supplier - The manufacturer and/or manufacturers agent supplying or quoting on the specified article. • Article, Unit, Assembly - All refers to the equipment defined by this specification. • DC or d.c. - Direct Current. • AC or a.c. -Alternating Current. • °C - Degree Celsius (Centigrade) • T - Degree Fahrenheit • W -1000 volts. • CPS or Hz - Cycles per second. • psig - Pounds per square inch gauge. • V or v - Volts. • WA -1000 Volt-amperes. 18 368-300 REV. SYM: m APPENDIX A Typical pad designs are shown in Figures 1A through 3A. The dimensions in inches of Figures 1A through 3A will fit the minimum compartments on transformers covered by this Specification as well as the maximum transformer envelope. 19 368-300 REV.SYM: MM 85' 55' T3' 15' I PRIMARY SEC. 6' FRONT I• —(�'-I I t-- 26' 27' -- 13' 19 FOUR 113 REBAR LENGTH AND WIDTH 10�y 40' 3r r 7 5/8' —• .TL3. T I Notes on Pad Material — 1. Concrete must be 3,000 psi minimum. 2. Maximum coarse aggregate size 1 1/2 inches. Space requirements for pad and primary switching cabinet will generally be 9' X 12'. Factors to be considered in locating the pad include — 1. Accessibility — The transformer pad shall be accessible to line boom trucks equipped for the installation and removal of heavy transformers. Such accessibility shall not require intrusion on adjacent property. 2. Proximity of Buildings, Walls, Barriers, and/or Overhangs — In addition to the clearances required for installation and removal, the minimum clearance in front of the transformer pad shall be eight (8) feet and the minimum clearance from all other sides shall be three (3) feet. It the building has on overhang, clearance to the edge of the transformer pad shall be measures horizontally from the outer edge of the overhang. Transformers through 300 KVA may he installed under the overhang if the vertical clearance between the pad and the overhang is at least 25 feet and the location is accessible to line boom trucks. 3. Codes and Standards — In addition to the above, the installation shall conform to the Notional Electric Code and federol, state and city codes and standards. 2 8 25/93 REV NO. DATE DWN D.E. APP I DSNG. ENG APP DIST. APP ® CITY OF FORT COLLINS DWG 3PHaSE1 A LIGHT AND POWER DEPARTMENT TRANSFORMER PAD DESIGN 75 — 500 KVA 1°"' •"° �"""" 3 PHASE Figure 1A - Pad Design (75 - 500 KVA) 20 368-300 REV. SYM: mm BY 72' 15' I PRIMARY SECONDARY -I}I-- IT �• FRONT— I �3• 18' 26' 23' 1s- F➢UR B3 REBAR 49' 3'-� 3' LENGTH AND WIDTH 7 5/9 • — — 3' T Notes on Pad Material - 1. Concrete must be 3,000 psi minimum. 2. Maximum coarse aggregate size 1 112 inches. Space requirements for pad and primary switching cabinet will generally be 9' X 12'. Factors to be considered in locating the pad Include - 1. Accessibility - The transformer pad shall be accessible to line boom trucks equipped for the installation and removal of heavy transformers. Such accessibility shot not require intrusion on adjacent property. 2. Proximity of buildings, Walls, barriers, and/or Overhangs - In addition to the clearances required for installation and removal, the minimum oearance in front of the transformer pod shall be eight (8) feet and the minimum clearance from all other sides sholl be four (4) feet. If the building has an overhang, clearance to the edge of the transformer pad shall be measured horizontally from the outer edge of the overhang. Transformers through 300 KVA may be installed under the overhang if the vertical clearance between the pad and the overhang is of least 25 feet and the location is accessible to line boom trucks. 3. Codes and Standards - In addition to the above, the installation shall conform to the National Electric Code and federal, state and city codes and standards. 1 02 90 1 REV NO. DATE DWN I D.E. APP I DSNG. ENG APP DIST. APP CITY Or FART COLLINSWG 3PHASE2 LIGHT AND POWER DEPARTMENT 4a TRANSFORMER PAD DESIGN 500 - 1000 KVA 'J1111414T 'wwl lwc " 3 PHASE Figure 2A - Pad Design (500 - 1000 KVA) 21 368-300 REV. SYM: MM 107' 1 T-" --1-4-� I- �• L 3' PRIMARY 15' f WINDOW SECDNDARY A— a• — FRONT — I• T L } 2W---- 23'--- 2B• _-..� 28•- l 3• -FIVE Its REBAR 3 51• 3• LENGTH AND WIDTH — — — t T Notes on Pad Material - 1. Concrete must be 3,000 psi minimum. 2. Maximum coarse aggregate size 1 1/2 inches. Space requirements for pad and primary switching cabinet will generally be 9' X 12'. Factors to be considered in locating the pad include - 1. Accessibility - The transformer pad shall be accessible to line boom trucks equipped for the installation and removal of heavy transformers. Such accessibility shall not require mtrusion on adjacent property. 2. Proximity of Buildings, Walls, Barriers, and/or Overhangs - In addition to the clearances required for installation and removal, the minimum clearance in front of the transformer pad shall be eight (5) feet and the minimum clearance from ell other side shall be four (4) feet. If the building has an overhang, clearance to the edge of the transformer pad shall be measured horizontally from the outer edge of the overhang. Transformers through 300 KVA may be installed under the overhang if the vertical clearance between the pad and the overhang is at least 25 feet and the location is accessible to line boom trucks. 3. Codes and Standards - In addition to the above, the installation shall conform to the National Electric Code and federal, state and city codes and standards. "'02'90 REV N0. DATE DWN D.E. APP DSNG. ENG APP DIST. APP CITY OF FORTCOLLINS DWG 3PHASE3 Q PARTMENT LIGHT AND POWER DEPARTMENT TRANSFORMER PAD DESIGN ".r swe.. aauer 1000 - 2500 KVA Lent ",ml 3 PHASE Figure 3A - Pad Design (1000-2500 KVA) 22 368-300 REV. SYM: mm APPENDIX B 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, manufacturers equipment must also satisfy all requirements of this Specification to be acceptable. TABLE 3B MANUFACTURER SERIAL NO. Cooper Power Systems All ASEA Brown-Bovari (ABB) All Howard Industries All Pauwels Transformers All The manufacturers in the following list have been condidonalfy 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. 23 368-300 REV. SYM: MM APPENDIX C The following forms for Individual and Average Transforrer Losses are used by the City of Fort Collins to determine loss penalties. 1) Transformer Loss Evaluation Average Losses Form 2) Individual Transformer Loss Evaluation Form 24 368-300 TRANSFORMER LOSS EVALUATION - AVERAGE LOSSES City Order No. S/N Manufacturer Invoice No. KVA/Unit LINE DESCRIPTION (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 AMOUNT REV. SYM: mm 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. 368-300 INDIVIDUAL TRANSFORMER LOSS EVALUATION City Order No Manufacturer KVA/Unit LINE DESCRIPTION (1) Tested core losses (2) Quoted core losses (3) Excess core losses (4) (5) (6) (7) (8) S/N Invoice No. line (1) less line (2) but not less than zero Percent difference Line (3)=line (2) x 100 Tested total losses Quoted total losses Excess total losses Line (6) less line (6) but not less than zero. Percent difference Line (7) _ line (6) x 100 Tested copper losses Quoted copper losses Excess copper losses Line (9) less line (10) but not less than zero. Penalty for excess core losses Line (3) x $ Penalty for excess copper losses Line (11) x $ Penalty to be assessed manufacturer Line (12) plus line (13) Prepared By: Design Engineering AMOUNT REV. SYM: MIXI 26 368-300 Revised 12/13/96 Special Conditions and Supplemental Instructions to Bidders Applicable to Specification 368-300 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". I . Impedance volts in percent (%) at full load, high voltage to low voltage at 85°C 2. No load and total losses at 85°C 3. Delivery in weeks 4. A statement indicating compliance with our Specification with exception or a detailed listof exceptions. 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 provide the method and indices to be used in computing the amount thereof. Escalation occurring after acceptance, if Purchaser exercises the option to delay shipment after manufacturing is completed, will not be paid. If the above information and compliance statement are not supplied the proposal will not be evaluated An alternate bid for the total order may be submitted in addition to the unit bids. B. Loss Evaluations Loss penalties and loss evaluations will be based on the following values: 1. No-load or excitation losses at $3.90/watt 2. Load losses at $2.30/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. 2. Test reports shall accompany the invoice. If test reports do no 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 Standards Engineering Section, Fort Collins Utilities - Light & Power. 3. Loss penalty credits and escalation charges shall be itemized on the invoice. THE CITY OF FORT COLLINS Light and Power Department P.O. Box 580 Fort Collins, CO 80522 SPECIFICATION NO: 38 -300 TITLE: PAD -MOUNTED COMPARTMENTAL-TYPE.THREE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE INSULATED LOAD BREAK HIGH -VOLTAGE CONNECTORS r APPROVED BY: Kraig Bader Standards Engineering Division Manager ORIGINATION DATE: 8/12/83 REVISED: 21212006 REV. SYM: MM ITEMS COVERED BY THIS SPECIFICATION DESCRIPTION STOCK NO. SPECIFICATION NO. SERIAL 75 KVA 208Y/120 RADIAL 368-300 -006 75 KVA, 408Y/277 RADIAL 368-300 -007 75 KVA 208Y/120 LOOP 368-300 -008 75 KVA, 480Y/277 LOOP 368-300 -009 150 KVA, 208Y/120 LOOP 368-300 -015 150 KVA, 480Y/277 LOOP 368-300 -016 300 KVA, 208Y/120 LOOP 368-300 -030 300 KVA 480YI277 LOOP 368-300 -031 500 KVA 208Y/120 LOOP 368-300 -050 500 KVA 480Y/277 LOOP 368-300 -051 750 KVA, 20BY/120 LOOP 368-300 -075 750 KVA, 480Y/277 LOOP 368-300 -076 1000 KVA, 208Y/120 LOOP 368-300 -100 1000 KVA, 480Y/277 LOOP 368-300 -101 1500 KVA, 480Y/277 LOOP 368-300 -151 2000 KVA, 48DY1277 LOOP 368-300 -201 2500 KVA, 480Y/277 LOOP 368-300 -251 2 368-300 REV. SYM: MM REVISION DESCRIPTIONS REVISION DESCRIPTION Previous on file APPROVED REVISION FF: Tim Sagan • Add Paragraph 5.2.2.9.3: pentahead locking bolts Susan Coram • Paragraph 3.2.2.13.1: add glossy requirement. 10-18-95 REVISION GG: Susan Coram • Title page: Remove revised date Tim Sagan • Paragraph 4.4 and Table 2A: Change Temperature Tests and Noise Test from every 9-22-95 unit to one unit of design. REVISION HH: Opal Dick • GE removed from Appendix B Tim Sagan 12-13-98 REVISION II: • Add paragraph 3.2.2.10 OVERCURRENT PROTECTION and renumber remaining paragraphs in section 3.2 Opal Dick • Revise Fig. 1 to reflect a "V" configuration for the primary bushing arrangement vs. an Tim Sagan in -line arrangement. 6/3199 • Revise Fig. 17 to remove requirement for CT mounting studs and increase dimensions A from 5" and 5.5" to 6" on 225-2500 WA sizes REVISION JJ Bill Bray • Reformat and converted to MS Word, delete List of Active Pages Tim Sagan 911412D00 REVISION KK Kraig Bader • Added drawing la to describe cable accessory parking stand detail, revise to reflect Tim Sagan current editions of national standards, change impedance on 368-300-009 from 911112001 1.7% to 1.9%. REVISION LL Kraig Bader • Change fusing from oil -immersed current sensing weak link cartridge to a current 4/2/2004 sensing bay-o-net fuse link in series with an ELSP current llmiting backup fuse (clause 3.2.2.10). • Change column header for impedance table in 3.2.2.1 to clarify that impedance numbers are nominal values. (Tolerances are consistent with ANSI C.57.12.00- 2000) • Changed wording from "Mr. Ouch" in 3.2.2.15 to "warning label' Revision MM Kraig Bader • Change clause 3.2.2.10 to specify current sensing bay-o-net fuse link by size and 2/2/2005 part number. Table 2 was added for this purpose. • Renamed table in 3.3.2.1 to from Table 2 to Table 3 • Renamed table in 4.3. from Table 2A to Table 4 3 368-300 REV. SYM: MM TABLE OF CONTENTS ITEMS COVERED BY THIS SPECIFICATION ............. »................... .................... ............... ............. ........ ...»... ............. ...... ...........2 REVISIONDESCRIPTIONS.................................................................................................................»..............................................3 1. SCOPE..................................................................................................................................................................................................5 2. APPLICABLE DOCUMENTS...........................................................................................................................................................5 3. REQUIREMENTS.............................................................................................................................................................................»5 3.1 GENERAL REQUIREMENTS FOR DESIGN................................................................................................................................5 3.2 SPECIFIC REQUIREMENTS FOR DESIGN OF LOOP -FEED UNITS........................................................................................7 3.3 SPECIFIC REQUIREMENTS FOR DESIGN OF RADIAL -FEED UNITS.................................................................................16 4. QUALITY ASSURANCE.................................................................................................................................................................16 4.1 GENERAL.....................................................................................................................................................................................16 4.2 TEST CONDITIONS....................................................................................................................................................................16 4.3 FUNCTIONAL TESTS..................................................................................................................................................................17 4.4 TEST METHODS -- FUNCTIONAL TESTS................................................................................................................................17 5. PREPARATION FOR DELIVERY.................................................................................................................................................17 6. DEFINITIONS AND ABBREVIATIONS....................................................................................................................................18 APPENDIXA.........................................................................................................................................................................................19 APPENDIXB.........................................................................................................................................................................................23 APPENDIXC.........................................................................................................................................................................................24 TRANSFORMER LOSS EVALUATION -AVERAGE LOSSES.................................................................................................25 INDIVIDUAL TRANSFORMER LOSS EVALUATION ........-....................................................................................................26 4 368-300 SPECIFICATION FOR PAD -MOUNTED COMPARTMENTAL -TYPE, THREE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE INSULATED LOAD BREAK HIGH -VOLTAGE CONNECTORS 1. SCOPE REV. SYM: tit This Specification establishes the minimum electrical requirements and mechanical features of three phase, 60 HZ, mineral oil immersed, self -cooled, pad -mounted, compartmental -type distribution transformers rated 2500 kVA and smaller, high voltage 13,200 Grd Wl7620 volts, with separable insulated load break high voltage connectors. These transformers are used for step down purposes from an underground primary cable supply. This standard generally conforms to ANSI requirements for pad -mounted compartmental -type, self -cooled, three-phase, distribution transformers for use with separable insulated high -voltage connectors, C57.12.26. 2. APPLICABLE DOCUMENTS The following documents form a part of this Specification to the extent specified herein. The latest issue in effect on the date of invitation for bids shall form a part of this Specification, unless otherwise noted. • ANSI C57.12.00 - Distribution, power, and regulating transformers, and shunt reactors, general requirements for • ANSI C57.12.26 - Pad mounted, compartmental -type, self-cwled three phase, distribution transformers for use with separable insulated high voltage connectors, high voltage 34,500 Grd Y119,920 volts and below, 2500 kVA and smaller, requirements for • ANSI C57.12.70 - Terminal markings and connections for distribution and power transformers • ANSI C57.12.80 - Terminology for power and distribution transformers • ANSI C57.12.90 - Distribution, power, and regulating transfomrers, and shunt reactors, test code for • ANSUIEEE 386 - Separable insulated connectors for power distribution systems above 600V • NEMA STANDARD TR7 - Transformers, regulators and reactors 3. REQUIREMENTS 3.1 GENERAL REQUIREMENTS FOR DESIGN 3.1.1 BASIC DESIGN STANDARDS Transformers purchased under these Specifications shall be new and, unless otherwise specified, meet the requirements of the applicable ANSI Standards and the modifications and additions given in the subsequent paragraphs. In case of conflict, the requirements of the following documents shall apply in the priority shown: a) This Specification. b) ANSI C57.12.26 c) Other applicable ANSI and NEMA Standards. 3.1.2 KILOVOLT AMPERE TEMPERATURE RATINGS Kilovolt -ampere ratings are continuous and are based on not exceeding either a 65°C average winding temperature or an 800C hot spot temperature rise. The temperature rise of the insulating oil shall not exceed 65°C when measured near the top of the tank. The temperature rise is based on an altitude of 3,300 feet. 3.1.3 GENERAL CONSTRUCTION 3.1.3.1 The pad -mounted compartmental -type transformers shall consist of the transformer tank, high -voltage cable terminating compartment, and the low -voltage cable -terminating compartment. All three of these components shall be assembled as an integral unit, tamperproof and weatherproof for mounting on a pad. There shall be no exposed screws, bolts or other fastening devices, which are externally removable, except the main cover bolts may be exposed. Where the main cover bolts are exposed, the 5 368-300 REV. SYM: mm comer bolts shall be welded or otherwise rendered tamperproof. There shall be no opening through which foreign objects such as sticks, rods, or wires might be inserted to contact live parts. Suitable means for padlocking the compartment door(s) shall be provided. 3.1.3.2 The high and low -voltage compartment shall be located side by side on one side of the transformer tank. When facing the compartment, the low -voltage compartment shall be on the right. 3.1.3.3 Construction of the unit shall be such that it can be lifted, skidded, and slid into place on the mounting pad without disturbing the entrance cables. 3.1.3.4 An undercoating over the regular finish or an equivalent treatment shall be applied to all surfaces that are in contact with the pad to minimize corrosion. 3.1.3.5 Minimum dimensions shall be as shown in Fig. 1 of this Specification. Maximum transformer and minimum pad dimensions are shown in Fig. 6 of this Specification. 3.1.4 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 Table 18 and the following equation "Units" shah 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, 3.1.5 SERVICE CONDITIONS Service conditions shall be as defined in paragraph 4.1 of ANSI C57.12.00 except the ambient temperature range shall be 400C above to 320C below zero. The transformer shall operate safely with starting temperatures as low as 32"C below zero. 6 368-300 REV. SYM: MIN 3.2 SPECIFIC REQUIREMENTS FOR DESIGN OF LOOP -FEED Units 3.2.1 FUNCTIONAL DESCRIPTION The transformer shall be a three phase, pad mounted, loop feed -safe break, "deadfronf type for use on a 13.8 kV grounded "Y" distribution system. 3.2.2 DESIGN AND CONSTRUCTION 3.2.2.1 RATINGS Table 1 - Lonn-Feed Tranafnrmer Ratinas Stock No. WA Low Voltage Nominal Impedance 101humshina7 e/Con . Hil h Volta a Low Voice e 368-300- 008 75 208YI120 1.9% 0 (M) 368-300- 009 75 480YI277 1.7% 0 ®(O 368-300- 015 150 1 208Y/120 2.1% O ®® 368-300- 016 150 480Y/277 2.1% 0 ®m 368-300- 030 300 208Y/120 2.5% 0 0T 368-300- 031 300 480Y/277 2.5% 0 ®® 368-300- 050 500 208Y/120 3.04% 0 ®® 368-300- 061 500 480Y/277 3.04% i0 ®0 368-300- 075 750 208Y1120 5.75% 0 m 368-300- 076 750 480Y/277 5.75% r0 368-300- 100 1000 208Y/120 5.75% 0 368-300- 101 1000 480Y/277 5,75% OO 368-300- 161 1500 480Y/277 5.75% O► 0 368-300- 201 2000 480Y/277 5.75% 0 0 368-300- 251 2500 480Y/277 5.75% O OFigure 1 (V-config.) of this specification 0 Low -voltage line and neutral terminals shall be stud type bushings in accordance with ANSI C57.12.26-1992, Fig. 9(d) and shall include a separate spade with NEMA standard drilling 4@Figure 9(a) of ANSI C57.12.26 - 1992 (4-hole pad) ®Figure 9(b) of ANSI C57.12.26 -1992 (6-hole pad) 3.2.2.2 INSULATION LEVEL 3.2.2.2.1 The basic impulse level (BIL) of the completely assembled transformer, including high -voltage and low -voltage terminals shall be 95 kV and 30 kV respectively. 3.2.2.2.2 Dielectric test levels shall be in accordance with the distribution levels in Paragraph 5.10 of ANSI C75.12.00-2000 3.2.2.2.3 The unit shall withstand test voltages in accordance with ANSI C57.12.00 and impulse tests in accordance with NEMA Standards for Transformers, Publications No. TR1. 3.2.2.3 TRANSFORMER CORE A five -legged core -coil assembly or three separate core -coil assemblies shall be employed. The use of three-legged designs is expressly prohibited. 7 .368-300