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BID - 7122 LP TRANSFORMERS 1500KVA PAD MOUNTED COMPARTMENTAL TYPE
Financial Services Purchasing Division 215 N. Mason St. 2"d Floor PO Box 580 Fort ColBns, CO 80522 970.221.6775 970.221.6707 fcgov.com/Purchasing Bid Proposal BID 7122 LP Transformers, 1500kVA, Pad -Mounted, Compartmental Type BID DATE: 2:00 P.M. (Our clock) March 25, 2010 REV. SYM: MM, 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, "deadfront" 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 - L000-Feed Transformer Ratings Stock No x, k1/A Low 1/olt4ge=„ Nominal Impedance �� Bushing T HighUoitage, pe/Config, _Low Vota."ge 368-300- 008 75 208Y/120 1.9% O OO 368-300- 009 75 480Y/277 1.7% O OO 368-300- 015 150 208Y/120 2.1 % D (D 368-300- 016 150 480Y/277 2.1 % ) OO 368-300- 030 300 208Y/120 2.5%O OO 368-300- 031 300 480Y/277 2.5% D 0 368-300- 050 500 208Y/120 3.04% D OO Os 368-300- 051 500 . 480Y/277 3.04% D OO 368-300- 075 750 208Y/120 5.75% D OO 368-300- 076 750 480Y/277 5.75% D 6 368-300- 100 1000 208Y/120 5.75% O Os 368-300- 101" 1000 480Y/277 5.75% D Os 368-300- 151 1500 480Y/277 5.75% D OO 368-300- 201 2000 480Y/277 5.75% ) Os 368-300- 251 1 2500 480Y/277 5.75%O DFigure 1 (V-config.) of this specification Os 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 ®Figure 9(a) of ANSI C57.12.26 - 1992 (4-hole pad) OO 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 REV. SYM: MM 3.2.2.4 HIGH VOLTAGE TAPS A no-load tap changer with external operating handle shall provide two 2'/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 3.2.2.5.1 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 ANSI/IEEE Std. 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'/z inches minimum, 3'/z 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. 8.2.2.7.3 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: • '/4" 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 corner bolts shall be welded or otherwise rendered tamperproof. 3.2.2.9.2 Tank grounding provision shall be in accordance with paragraph 7.6.4 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 — Fusing Requirements Expulsion FuseContmuous Current LimitIng Fuse 5 Stock kYA Curr6h,�j ating Continuous Current Ratm "acit p,." 'Part"Number*),.,,,:", Part Number* :`" v. 368-300-008 75kVA 10A 30A 368-300-009 (4000353C06) 354403OM61M 368-300-015 150kVA 15A 40A 368-300-016 (4000353C08) (3544040M61M 368-300-030 300kVA 25A 65A 368-300-031 (4000353C10) (3544065M61M) 368-300-051 500kVA 40A 100A (4000353C12) (3544100M71M 368-300-075 750kVA 65A 125A 368-300-076 750kVA (4000353C14) (3544125M71 M) 368-300-100 1000kVA 368-300-101 1000kVA 368-300-151 1500kVA 140A 250A : Parallel 125A fuses 368-300-201 2000kVA 4000353C17 3544125M71M 368-300-251 2500kVA 125A Hi -Amp OL Link C05CB 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. 0 368-300 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, Munsell #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 6.0 6.0 27.0 FLANGE 3/4" MIN 1 112" MAX I BELOW CL V4.5 y MIN MIN 1+ �6.5_ + 4. 6.5 H1B X1 X3 4.' + -} 2 H + 33B 2B + + (]E)-- — — ®- — XO X2 B 4.5 4.5 6.5 6.5 4.5 6.5 38.0 MIN' A MIN CL 18.0 MIN' KVA RATINGS LOW VOLTAGE RATINGS COMPARTMENT DIMENSIONS (MINIMUM) - BUSHING HEIGHT A' B 75-150 ALL 23.25 27 225-500 ALL 26 31 , 750-1000 480Y/277,208Y/120 28 46 1500-2500 480Y/227 28 46 NOTE: Denotes inside dimensions. See Fig.5 All dimensions in (inches). Maximum dimensions shall allow one inch clearance from edge of pad (Fig. 6). Figure 1 - Accessory compartment & Bushing Dimensions (Config. 1) REV. SYM: MM 368-300 j-- 2.65 MIN- ... TANK SURFACE TANK SURFACE ' � 4R � I i 1 1 ✓� 0,75 i NISIDE Cable Accessory Parkins Start() 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 4.0 A A A 4.0" MIN MIN X3 B CL XO X2 REV. SYM: MM 6" RADIUS TYPICAL 3 PLACES KVA RATINGS LOW VOLTAGE RATINGS A B 75-150 ALL 4.75 8 225-500 ALL 6 8. 750-2500 480/277, 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 A 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 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 1" oil drain plug X 1"oil drain valve with sampling device X X Upper filter 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 3/8" x 5 5/8" centers) X X X Manual/automatic pressure relief valve X X X 15 368-300 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, "deadfront" 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 Tahle 3 - Radial -Feed Transformer Ratinas Stock No k�/A Low A V91tagempedanceEHi"`h1/olta F Bushing T pe/Confi 368-300- 006 75 208Y/120 1.9% OO ®© 368-300- 007 75 480Y/277 1.9% ( ®© O 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 ® Figures 9(a) & 9(d) of ANSI C57,12.26 - 1992 (stud with 4-hole pad) © Figure 8(a) 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 CITY OF FORT COLLINS INVITATION TO BID BID #7122 LP Transformers, 1500kVA, Pad -Mounted, Compartmental Type 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) March 25, 2010. Special Instructions All bids must be properly signed by an authorized representative of the com pany 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 contractor honor the purchase order will because 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 inequity. 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 writi ng 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 obligati on to the City. Bids must be furnished exclusive of any federal excise tax, wherever applicable Bidders must be properly licensed and secure necessary perm its 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 i ndividual 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 inform alities. 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, 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 „pTEST,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 C57.12.00 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 (This 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* 4.6.4 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 preflled 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 palletized 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 REV. SYM: MM 6. DEFINITIONS AND ABBREVIATIONS • Vendor or Supplier - The manufacturer and/or manufacturer's agent supplying or quoting on the specified article. • Article, Unit, Assembly - All refers to the equipment defined by this specification. • DC or d.c. - Direct Current. • AC or a.c. - Alternating Current. • °C - Degree Celsius (Centigrade) • .°F - Degree Fahrenheit • W - 1000 volts. • CPS or Hz - Cycles per second. • psig - Pounds per square inch gauge. • V or v - Volts. • WA - 100.0 Volt-amperes. 18 368-300 REV. SYM: MM 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' T T3' 15' PRIMARY SEC. 6' FRONT I• I T-3' 26' 27' 13' 19' FOUR #3 REBAR LENGTH AND WIDTH 10'�I 40' 3' I 3' 7 5/8' L 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 pod 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. If the building has an overhang, clearance to the edge of the transformer pod shall be measures horizontally from the outer edge of the overhang. Transformers through 300 XVA may be installed under the overhang if the vertical clearance between the pod and the overhang is at least 25 feet and the'locotion 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. 2 1 8/25/93 REV NO. I DATE DWN D.E. APP DSNG. ENG APP' DIST. APP CITY OF FORT COLLINS DWG 3PHASE1 LIGHT AND POWER DEPARTMENT TRANSFORMER PAD DESIGN 75 - 500 KVA L="T —d PCIWMR 3 PHASE Figure 1A - Pad Design (75 500 KVA) 20 368-300 REV. SYM: mm B 5' I 1 72' T 3' 15' PRIMARY SECONDARY 1 T T B' FRONT — T 3• 26' 23' 1B' FOUR 43 REBAR LENGTH AND WIDTH 349' 3' 7 5/B — 3' T T Notes on Rod Material — 1. Concrete must be 3,000 psi minimum. 2. Maximum coarse aggregate size 1 1/2 inches. Soace requirements for pod 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 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. 11 02 90 REV NO. DATE DWN D.E. APP DSNG. ENG APP DIST. APP CITY OF FORT COLLINS DWG 3PHASE2 LIGHT AND POWER DEPARTMENT go "a—m- -a TRANSFORMER PAD DESIGN 500 — 1000KVA uoFrr -d POWER 3 PHASE Figure 2A - Pad Design (500 -1000 KVA) 21 368-300 REV. SYM: MM -- 107' PRIMARY 15' WINDOW SECONDARY B' FRONT 23'28' 28• FIVE #5 REBAR LENGTH 51' 3' AND WIDTH r 3' 7 5/8' — 1 7- 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 pod include — 1. Accessibility — The transformer pod 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 pod . shall be eight (8) feet and the minimum clearance from all . other side shall be four (4) feet. If the building has an overhang, clearance to the edge of the transformer pod shall ' be measured horizontally from the outer edge of the,overhong. Transformers through 300 KVA may be installed under the overhang if the vertical clearance between the pod 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. 11/02/90 REV NO. DATE DWN D.E. APP I DSNG. ENG APP DIST. APP CITY OF FORT COLLINS DWG 3PHASE3 LIGHT AND POWER DEPARTMENT TRANSFORMER PAD DESIGN 1000 - •2500 KVA LM- r .d "C""E' 3 PHASE Figure 3A - Pad Design (1000-2500 KVA) 11 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, manufacturer's equipment must also satisfy all requirements of this Specification to be acceptable. . TABLE 3B MANUFACTURER SERIAL NO. Cooper Power Systems Al 1 ' ASEA Brown-Bovari (ABB) All Howard Industries All Pauwels Transformers 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. 23 368-300 REV. SYM: MM APPENDIX C The following forms for Individual and Average Transformer 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. 25 368=300 REV. SYM: MM INDIVIDUAL TRANSFORMER LOSS EVALUATION City Order No. S/N Manufacturer Invoice No. KVA/Unit LINE DESCRIPTION AMOUNT (1) Tested core losses (2) Quoted core losses (3) Excess core losses line (1) less line (2) but not less than zero (4) Percent difference Line (3) _ line (2) x 100 (5) Tested total losses (6) Quoted total losses (7) Excess total losses Line (5) less line (6) but not less than zero. (8) Percent difference 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 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, al I freight is F.O.B. Destination, Freight Prepaid. All freight charges must be included in prices submitted on proposal. Discounts: any discounts allowed for,prom pt 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 avail able 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 col lusive or a sham bid will be rejected and reported to authorities as such. Your authorized s ignature of this bid assures that such bid is genuine and is not a collusive or sham bid. Bid results: for information regarding results for indiv idual bids send a self-addressed, self -stamped envelope and a bid tall y 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 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". 1. Impedance volts in percent (%) at full load, high voltage to low voltage at 850C 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 list of 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. Purchase Order Terms and Conditions 1. COMMERCIAL DETAILS. 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, eitherwhen 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 ofFort 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 pan 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 Terns. Shipments most be F.O.B.. City of Fon Collins, 700 Wood St, Fort Collins, CO 80522. unless otherwise specified on this order. 11permission is given to prepay freight and charge separately, the original freight bill must accompany invoice. Additional charges far 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 roles of the state, municipality, territory or political subdivision where the work is performed, orrequired by any other duly constituted public authority havingjurisdiction over the work of vendor. Seller funheragrees tohold the City ofFort Collins harmless from and against all liabilityand loss incurred by than by reason of an asserted or established violation of any such laws, regulations, ordinances, riles 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 terns and conditions stated herein set forth and any supplementaryor 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 ifyou cannot make complete shipment to arrive on your promised delivery date as noted. Time is of the essence. Delivery and performancemust 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 laze 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 ofplacing 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 warrens 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 name The Seller agrees to hold the purchaser harmless from any loss, damage or expense which the Purchaser may suffer or inctr on account of the Sellers breach of waranty. 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 m materials furnished by the Seller. Acceptance or rue 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 warramies or gmarnmees, but such liability shall in no event include loss of profits or loss 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 terns by written change order. 5. CHANGES A 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 Prrchmer 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 my of their obligations as to any goods delivered hereunder. 7. CLAIMS FOR ADJUSTMENT. Any claim for adjustment most 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 maybe 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 ants 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, clearand unrestricted title to the Purchaser for all equipment - materials, and items furnished in performance of this agreement, free and clear of -my and all liens, restrictions, reservations, security interest encumbrances and claims of others. I1. 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 hereunderorapproval ofthe design, shall notrelease 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 stria 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 anfitnut laws for such overcharges relating to the particular goods or services purchased m 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 Sellers contractual obligations, including warranty, shall not be deemed to be reduced, in any way, because such work is performed m 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 pav by reason of such infringement at any time during the prosecution or after the completion of the wodc. 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 orpan is enjoined, the Seller shall, at its own expense and at its option. eitherprocure forthe Purchaser the right to continue using said equipment or parts, replace the same with substantially equal but non-infringng equipment, or modify it so it becomes non -infringing. - 15. INSOLVENCY. If the Seller shall become insolvent or bankmpt, make an assignment for the benefit of creditors, appoint a receiver, or trustee for any of the Sellers property or business, this ordermay forthwith be canceled by the Purchaser without liability. 16. GOVERNING LAW. - The definitions of terns 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 Sellershall carry on said work at Sellers 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 Sellers final completion and acceptance, complete the work at Sellers own expense and to the satisfaction of the Purchaser. When materials and equipment are famished 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 accordancewith the laws of the state in which the work is to bedone. The Seller shall also cam 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 env 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 famish the Purchaser with a cafificae 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 spedf-v the date when such compensation and insurance expires. The Selleragrees 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 form this purchase order or in connection herewith. The Seller will ihdemnifv 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 orproperty to which the Purchaser may be put or subject by reason of any act, action, neglect, omission or default on the pan of the Seller, any of his contractors, or any of the Sellers or contractors offic—hinet 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 Sellabereby agrees to assumte the defense thereofand to defend the same at the Sellers own expense, to pay any and all costs, charges, atiomeys 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, famish 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 04/2 THE CITY OF FORT COLLINS Light and Power Department P.O. Box 580 Fort Collins, CO 80522 SPECIFICATION NO: 368-300 TITLE: PAD -MOUNTED COMPARTMENTAL-TYPE,THREE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE INSULATED LOAD BREAK HIGH -VOLTAGE CONNECTORS i' r APPROVED BY: Kraig Bader Standards Engineering Division Manager ORIGINATION DATE: 8/12/83 REVISED: 2/2/2005 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, 480Y/277 LOOP 368-300 -031 500 KVA, 208Y/120 LOOP 368-300 -050 500 KVA, 480Y/277 LOOP 368-300 -051 750 KVA, 208Y/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, 480Y/277 LOOP 368-300 -201 2500 KVA, 480Y/277 LOOP 368-300 -251 . 2 368-300 REV. SYM: Mm REVISION DESCRIPTIONS ?; v REVISION DESCRIPTION (P„reviousonIn APPROVED REVISION FF: Tim Sagen • 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 Sagen • 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 Sagen 12-13-96 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, "W configuration for the primary bushing arrangement vs. an Tim Sagen 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 kVA sizes REVISION JJ Bill Bray • Reformat and converted to MS Word, delete List of Active Pages Tim Sagen 9 /14 / 2000 REVISION KK Kraig Bader • Added drawing 1a to describe cable accessory parking stand detail, revise to reflect Tim Sagen current editions of national standards, change impedance on 368-300-009 from 9 / 11 / 2001 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 limiting 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 4 368-300 REV. SYM: MM TABLE OF CONTENTS ITEMSCOVERED 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: MM 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 Y/7620 volts, with separable insulated load break high voltage connectors. These transformers are used for step down purposes from an underground primary cable supply. This standard generally conforms 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 -cooled three phase, distribution transformers for use with separable insulated high voltage connectors, high voltage 34,500 Grd Y/19,920 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 transformers, and shunt reactors, test code for • ANSI/IEEE 386 - Separable insulated connectors for power distribution systems above 600V • NEMA STANDARD TR1 - 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 80°C hot spot temperature rise. The temperature rise of the insulating oil shall not exceed 65°C when measured near the top of the tank. The temperature rise is based on an altitude of 3,300 feet. 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 corner 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. 3.1.8.5 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 '(12R 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 12R 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" 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. 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 40°C above to 32°C below zero. The transformer shall operate safely with starting temperatures as low as 32°C below zero. 6 368-300