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HomeMy WebLinkAbout194021 STUART C IRBY - PURCHASE ORDER - 8850617City of Fort Collins Date: 01 /31 /08 Purchase Order Number: 8850617 Delivery Date: 01/31/08 Buyer: DICK,OPAL Purchase Order number must appear on invoices, packing lists, labels, bills of lading, and all correspondence. Note: nA : T/�A/!� �/GL�it Gu• Line Qty UOM Description Unit Price Extended Price 1 2 EA T3000075; transformer 20,999.980 41,999.96 750 kVA pad mount T3000075 YARD TRANSFORMER, 750 kVA PAD -MOUNTED COMPARTMENTAL TYPE, THREE PHASE DISTRIBUTION WITH SEPARABLE INSULATED LOAD BREAK HIGH VOLTAGE CONNECTORS. HIGH VOLTAGE RATING: 13200 GRDY/7620. LOW VOLTAGE RATING: 208Y/120. SERIAL UMBER 075 TO BE IN ACCORDANCE WITH SPECIFICATION #368-300-075, REVISION MM MFR COOPER DELIVERY 8-10 WEEKS ESCALATION IS NOT APPLICABLE GUARANTEED NO LOAD LOSS - 1140 GUARANTEED FULL LOAD LOSS - 5211 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 3.2.2.5.1 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'/ inches minimum, 3'/ 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. K-1 14, 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: • W 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. 0611 tiIFTAH11rU 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 — Fusinq Requirements Expulsion Fuse Continuous Current Limiting Fuse Stock WA Current Rating Continuous Current Rating Number Capacity Part Number* Part Number* 368-300-008 75kVA 10A 30A 368-300-009 4000353C06 354403OM61M 368-300-015 1501kVA 15A 40A 368-300-016 4000353C08 3544040M61M 368-300-030 3001kVA 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 10001kVA 368-300-101 10001kVA 368-300-151 15001kVA 140A 250A : Parallel 125A fuses 368-300-201 2000WA 4000353C17 3544125M71M 368-300-251 25001kVA 125A Hi -Amp OL Link C05C8 25OA : 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. S4-3914I7 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. 368-300 FLANGE W4" MIN 1112" MAX )rLoc ( _-6.545� T�65 q, 38.0 MIN' —.-----_. i" XO X2 —1 180 MIN' —I COMPARTMENT I DIMENSIONS (MINIMUM) HEIGHT KVA RATINGS LOWVOLTAGE RATINGS A' 75150 ALL 23.25 2] I 225500 ALI 28 31 ➢50.1000 I 480Y12]]208YI120 28 —1 46 15002500 4SOY/ P] 28 46 NOTE: ' Denies inside tlimensions. "See Fig.S All dimensions in (inches), Maximum tlimensions shall allow one inch clearance from edge of pad (Fig. 6). Figure 1 - Accessory compartment & Bushing Dimensions (Config. 1) REV.SYM: MN 11 368-300 MIN - TANK SURFACE I TANK SUR FACE V,IR I / I I I 1 I X 0,75 � = + 1/ 8 _p INSIDE Cable Accessory 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 9.1-1911101 VATA ONNE'uiul 6" RADIUS _P` A • { 4.011 N� — TYPICAL 3 PLACES j I tj C � —TV— X, _ —'j6� , Xj cJ B i - � ��.� 1 t i YO X2 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 B C D E F 75 -006thru —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 :40m9-nii6161 TABLE IA ACCESSORY EQUIPMENT ACCESSORY KVA 75-150 300 500-2500 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 Table 3 - Radial -Feed Transformer Ratings Stock No. WA Low Voltage Impedance Bushin T e/Confi . Hi h Volta a Low Voltage 368-300- 006 75 208Y/120 1.9% OO 9)© 368-300- 007 75 480Y/277 1.9% OO ®6 OO Per Figures 5A, & 7 of ANSI 057,12.26-1992 (In -Line) EXCEPTION: high voltage bushings shall be 32 - 36 inches above the base of the transformer a0 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 850 C. 4.2.2 TOLERANCE ON IMPEDANCE VOLTAGE Tolerance shall be as specified in ANSI C57.12.00. 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 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 4.6A 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. 4A.3 LEAK TESTING The transformer tank shall be filled with oil and tested for air and oil leaks under (1) 4 psig vacuum for'/z 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). 4.4A 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 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. 10-1014141 City of Fort Collins Date: 01 /31108 Purchase Order Number: 8850617 Delivery Date: 01/31/08 Buyer: DICK,OPAL Purchase Order number must appear on invoices, packing lists, labels, bills of lading, and all correspondence. Note: Line City UOM Description Unit Price Extended Price GUARANTEED TOTAL LOAD LOSS 6351 IMPEDANCE - 5.73% BID #6022 PRICE AND DELIVERY: 1-9-08 Total $41, 999.96 City of Fort Ili s Director of Purchasing and Risk Management City of Fort Collins This order is valid over $2000 unless signed by James B. O'Neill Il, CPPO, FNIGP Accounting Department City of Fort Collins Purchasing, PO Box 580, Fort Collins, CO 80522-0580 PO Box 580 Fort Collins, CO 80522-0580 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) • OF - Degree Fahrenheit • kV - 1000 volts. • CPS or Hz - Cycles per second. • psig - Pounds per square inch gauge. • V or v - Volts. • WA -1000 Volt-amperes. (<Z�IIc 11 REV.SYM: MM F-AU 7MI�Ii:�1 Typical pad designs are shown in Figures 1A through 3A. The dimensions in inches of Figures 1A through 3A will fitthe minimum compartments on transformers covered by this Specification as well as the maximum transformer envelope. 19 368-300 35' REV.SYM: MM ___ t -I I III 3. 1SI 1 I IRIMAP y T3 -- G F0Cl2 3 RED(k LNGiu AND e:DIH to 40 I Notes on Pop Molerlel — I Cancreto rnusl be 3,000 pr. minimum 2 Maximum coarse aggregate do, 11/2 inches. Space requirements for cad and primary 5,mJ..ng cobinet will generally be 11' X 12' Factors In be considered la :oeating the po(I include — r. kccesSiUlllty — The transformer pad shall he accessible to line boom trucks equipped for the insleliatlon Arid removal of heavy trans(orrmers Such occossib=lily shall not reaolre ia0ru5ion an adjolent property 2. Proximity of Unildings, Walls. Barriers, and/or Overhangs — In Addition to the clearances required for rootellation and remv oal, the minimm uciearonca In front of the transformer pod shall be eight (8) feet and the min . � clearance frooll other sides shall be three(3) featn m If he building ho=_ an overhang, cloorcece to the edge or the transformer pod shall be measures horizontally from the outer edge or the overhang 'rronsformers throage 300 INA moy be instelled tinder the overhang if the vertical clearonce between the pad and the overhang iA Al Ieost 27 feet and the locotion is accessible to line bourn lrucl<s. 3. Codes and Slandords — Ia Addition to the above, the installation shall conform to the Dbfianal Electric Code and federal, dote end city codes and standards. 2 ---_ 8/25/93_ _ RFV N0. DA tL_ DWN DF Ae DSNC Ei CI l' OF f UH 1 COLLINS LIGHT AND f'OWCf� UCI'AF21(rACNI" _ _ T34NSFORMI F� f'!yD —DESIGN 75 — 500 KVA LIBMT Intl POWER r r vr n 1-in DiS'I APP DVVG 3PHASEI Figure 1A - Pad Design (75 - 500 KVA) 20 368-300 t Cancretc must be 3,000 ps minmum 2 Me.+,morn coarse aggreaale srze 1 112 Inches SP-el i"Ineemehls for pod end pnmory switching eobicet wilt generelfy be 9 x 12' foctors to be con=_(dered Rio locating the pad include - i. Accessibility — the trens(,mo, pod stroll be accessibie tr, line boom trr.ck_ equipped for the Installation and removoi of heavy tronsforrners Such necessblllfy moll not require intrusion on atljacent propefty 2. Proxlmdy of Oendmgs, Wells, Barriers, ond/or Overhangs - In eddhinn to the cleoronces required for nstallollen and removoi, the mrrdmum clearance in front of the tronsforrrief pad shell be eight (Et) feel end the minimum clearance from oil other sides shall be four (4) feet If the bulitling has on overhang, clearenlo to the edge of Once Iran sformer pad shop be measured ho,nntory L-om the aide( edge of the merhanq Tronsfonners through 300 I(VA mot, be irrslolled under lhn over'hong if the ve.(,oj Clearance ontv.een the pod end the overheng is of least 25 feet and the location is occessible to line boom lruc4s. Codes end Slenderds - In adchhon to the above, t'ne rostallotlon shall conform to the National Electric Code and federol, stole and city codes and stendords RCV NO_1 DArE pwru a r. APP j os_uc. rn CITY OF MR-T—COLLINS LIGH I AND POWLR D .PAR-W-N 1 I I�AI�SfOnl/rL(r PAU f)E�IGN 500 -- 1000 KVA uoFrr .°d aowvw . rr Figure 2A - Pad Design (500 - 1000 KVA) REV.SYM: MM DISI API, DWG 5PHASE2 21 368-300 Bones on Ped Motenol - Concrete nuns( be 3,000 psi mlmmu.e 2. tdoximum coarse aggregate site 1 I/2 inches Space reyu i r e in or is for pad and primary sciching couinet will generally be S' X 12' Factors to be considered in .'down the one Include - I Accessibiliiy - The Ironsformer pad shall be accessible to tine boorn trucks equipped for the in stolidtcon. and removal of hed:ry transformers Such ocaessibiiity shop net reavire iotrus.on on odjocenl property 2 Proxkndy of Buildings, 'V/olls, Barriers, and/or Overhangs - In addition to the clearances reouired for installotlon and removol , the ininimum clearance in front of the transformer pod shall be, eight (8) feet and the rr, rnmium clearence from oll other side shall be four A () feel. If the build'mg has an overhang, clearance in the edge of the transformer pad Shall be measured hen zon lolly Iran the outer edge of the overhang Transformers through 300 KVA may be installed under the overhong it the vertical denrance bet+veen the pod end the overhong is of least 25 feet and the location is oc,dds.tle to line boom trucks. 3 Codes and Stendords - In odohor to the above, the installation ,;hall conform to the National E.l,,hoo Code nod federal, stole and city codes and slendards. REV N0, I DATF_ �a G. ENG APP CITY OF FORT COLLINIIS LIGHT AND POWER DEPARI`NLNT 1000 — 2500 KVA ,S PHASF Figure 3A - Pad Design (1000-2500 KVA) REV. SYM: MM DIS I. APP D4VG 3PHAS[13 22 368-300 REV.SYM: NM 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 All 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. Manufacturer KVA/Unit LINE DESCRIPTION (1) No. of units (2) Average core losses (3) Quoted core losses S/N Invoice (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 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 City Order No, Manufacturer INDIVIDUAL TRANSFORMER LOSS EVALUATION S/N Invoice LINE DESCRIPTION (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 It 1) x $ (14) Penalty to be assessed manufacturer Line (12) plus line (13) Date Prepared By: Design Engineering AMOUNT REV. SYM: MM 26 368-300 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 APPROVED BY: � Kraig Bader Standards Engineering Division Manager ORIGINATION DATE: 8/12/83 REVISED: 2/212005 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 368400 -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 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 12-13-96 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 Sagan in -line arrangement. 6/3/99 • 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 Sagan 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 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 4.1 GENERAL....................................................................................................................................................... 4.2 TEST CONDITIONS....................................................................................................................................... 4.3 FUNCTIONAL TESTS, ................................................... ............................................................................... 4A TEST MRTHODS -- FI 1NCTInNA1. TESTS 5. PREPARATION FOR DELIVERY ......... 6. DEFINITIONS AND ABBREVIATIONS APPENDIX A .................................................. APPENDIX B.................................................. APPENDIXC.................................................. 18 19 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 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 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. 3.1.3.5 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 (IZR 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 "opecial Conditions and Supplemental Instructions to Bidders." Transformers will be evaluated on excitation lsses and IZR 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. 0i30110] 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 - Loon -Feed Transformer Ratinns Stock No. kVA Low Voltage Nominal Impedance Bushm T e/Confi . High Voltage Low Voltage 368-300- 008 75 208Y/120 1.9% D OO 368-300- 009 75 480Y/277 1.7% (D OO 368-300- 015 150 208Y/120 2.1 % D OO 368-300- 016 150 480Y/277 2.1 % D OO 368-300- 030 300 208Y/120 2.5% D OO 368-300- 031 300 480Y/277 2.5% OO OO 368-300- 050 500 208Y/120 3.04% O OO Os 368-300- 051 500 480Y/277 3.04% 0 OO 368-300- 075 750 208Y/120 5.75% D Os 368-300- 076 750 480Y/277 5.75% OO Os 368-300- 100 1000 208Y/120 5.75% D Os 368-300- 101 1000 480Y/277 5.75% i0 Os 368-300- 151 1500 480Y/277 5.75% O Os 368-300- 201 2000 480Y/277 5.75% OO OO 368-300- 251 2500 480Y/277 5.75% C Os OO Figure 1 (V-config.) of this specification OO 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