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HomeMy WebLinkAboutRESPONSE - BID - 7182 L&P 50KVA PAD-MOUNTED ANSI TYPE 1 COMPT. SINGLE PHASE DIST TRANSFORMERSFort Collins Utilities Transformer Bid Loss Data Sheet # Units Bid # 7182 Preparer Name : Shonna Banke Size Date: Preparer Contact Num: 303-576-0656 NL Loss Cost FL Loss Cost 19 Escalation Base Bid Base Bid $ / Guar No Load Guar Full Load Meet Specs? (is / is not) Guar Total NL Loss • NL FL Loss ' FL Evaluated Extended Cost Supplier Mfr / Mfr# Each Del/Wks Loss Loss Impedance (Yes / No) a factor Load Loss Loss Cost Loss Cost Bid (Total $) Stuart C. Irby Cooper $ 1,798.00 14-16 99 552 1.77-2.16 yes not 651 $ $ $ 1,798.00 $ Supplier 2 Mfr 2 $ - - 0 0 0.00 0 $ $ $ - $ Supplier 3 Mfr 3 $ - - 0 0 0.00 0 $ - $ - $ - $ _ Directions for Bidders: 1) Fill out the information in the cells with blue text. 2) Save the file using your company name and the bid number and e-mail it to: purchasing@fcgov.com (Example: TransformerSales_Bid_58.xls) secu To protect this file, take the following steps: 1) Select Tools, Options 2) Select Security Tab 3) Type your password in the 'Password to Open" field. 4) Re-enter your password to confirm it. Important! Please remember to include this password in the bid information that will be sealed in the envelope that will be unsealed at Bid Opening. This will secure your data until the time of the bid opening. 5) Save the file and e-mail it to: purchasing@fcgov.com REV. SYM: FF 3.2.2.9.1 The cover shall be welded construction. 3.2.2.9.2 Tank grounding provision shall consist of two steel pads, each with % inch - 13 NC tapped hole, 7/16 inch deep. 3.2.2.9.3 These ground pads shall be welded on the transformer base or on the tank wall near the base, one in the high -voltage side and one in the low -voltage side. In cases where the transformer tank and compartments are separate, provisions shall be made for electrically connecting them. 3.2.2.9.4 Locking bolts shall be pentahead. 3.2.2.10 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). 3.2.2.11 AUDIBLE SOUND LEVEL The audible sound level shall be in accordance with NEMA Standard TR1-1980. 3.2.2.12 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. 1B. 3.2.2.13 PAINT EEI "Finishing Guidelines" specification shall apply. Finish coat shall be Munsell Green, glossy. 3.2.2.14 LOSSES The total losses of transformer shall be the sum of the excitation losses and the load losses (I2R losses). Load loss tests shall be performed and reported on all units regardless of whether or not a record of such tests is available on duplicate units. Loss evaluations and loss costs will be based on the values shown in the "Special Conditions and Supplemental Instruction to Bidders." Transformers will be evaluated on excitation losses and I2R losses at the specified rates. If tested losses exceed quote losses but are within the tolerances of Table 18, ANSI C57.12.00-1987, 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 Table 18, ANSI C57.12.00-1987, 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. 3.2.2.15 SAFETY LABELS NEMA 1260 Safety Labels shall not be applied by the manufacturer: Purchaser will apply customer warning labels after delivery. 8 368-120 �74��•9'1ui■�� 4 QUALITY ASSURANCE 4.1 GENERAL 4.1.1 RESPONSIBILITY FOR INSPECTION Unless otherwise specified, the vendor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified, the vendor may utilize his own facilities or any commercial laboratory acceptable to the City of Fort Collins. The City reserves the right to perform or witness any of the inspections set forth in this Specification where such inspections are deemed necessary. 4.1.2 TEST REPORT The manufacturer shall furnish to the purchaser certified copies of the results of loss tests prior to payment. Copies 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 required by Section 4.4 shall be conducted under the following conditions: 4.2.1 REFERENCE TEMPERATURE The reference temperature to which losses, impedance, regulation, and efficiency are corrected shall be 85°C. 4.2.2 TOLERANCE ON IMPEDANCE VOLTAGE Impedance on completed units shall fall within the range specified herein. 4.2.3 TOLERANCE ON IMPEDANCE VOLTAGE ON A TAP The percent departure of tested impedance voltage on any tap from tested impedance voltage at rated voltage shall not be greater than the total tap voltage range expressed as a percentage of the rated voltage. 4.3 Not used. 4.4 TESTS The kinds of tests to be performed and the test procedures shall be as specified in ANSI C57.12.20, ANSI C57.12.00, and C57.12.90 except as specified herein. 4.4.1 DIELECTRIC TESTS No applied potential test shall be made. The induced -potential test shall be made by applying between the terminals of one winding a voltage which will develop from high -voltage line terminals to ground a voltage of 1000 volts plus 3.46 times the rated transformer winding voltage. 4.4.2 IMPEDANCE AND LOAD -LOSS TESTS Impedance and load -loss tests shall be made on each unit and may not be omitted even if a record of such tests made on a duplicate unit is available. 5 PREPARATION FOR DELIVERY Transformers shall be prefilled with the appropriate amount of transformer oil and shall be shipped by open -bed truck. Units shall be packaged in such a way as to provide for ease of handling and to protect units from shipping damage. 9 368-120 REV. SYM: FF Units shall be packaged on four-way universal pallets with 34 inches minimum opening and loaded on the truck for side removal. The Supplier shall give 24 hour notice prior to delivery for any shipments where an individual transformer weighs over 5,000 pounds. In addition to these requirements, the Supplier shall comply with any additional requirements or modifications shown on the purchase order and/or supplemental instructions. 6 DEFINITIONS AND ABBREVIATIONS Vendor or Supplier - The manufacturer and/or manufacturers agent supplying or quoting on the specified article. Article, Unit, Assembly - All refer 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 - 1000volts. • CPS or Hz - Cycles per second. • psig - Pounds per square inch gauge. • V or v - Volts. • KVA - 1000 Volt-amperes. c 10 368-120 REV. SYM: FF APPENDIX A — Transformer Stock Number Coding Below are examples that demonstrate the coding method used by City of Fort Collins to establish transformer stock numbers. 1. SINGLE PHASE Example #1 ��-�i 368 -1 B TransfnrmPr Single Phase 00 = 13.2Y/7620 & 7620/13.2Y x 2400/4160 outside pole 05 = 13.2Y7620 ESNA pole 20 = 13.2Y/7620 ESNA pad 11. THREE PHASE Example #2 IF—* 368 - Transformer 3 Phase Pad - XYZ -XYZ Other KVA 0 = 5 5=50 1=10 6=75 2=15 7=100 3=25 8=167 4=37.5 9=250 1 = single voltage 2 = dual voltage KVA 006 = 75 075 = 750 015 = 150 100 = 1000 030 = 300 150 = 1500 050 = 500 • All suffixes indicate 208Y/120 sec. • For 480Y/277 sec., add 1 to XYZ (ie. 007 would indicate a 75kVA with 480Y/277 sec.) 11 368-120 REV. SYM: FF y2 0 1 � �INSIDE 2.65MIN -3 @_ Io INSIDE 10 11 MINr2 3 ®OTTOM i OPENING A FL ANGE ' � � � ((NM2) TANK SURFACE INSIDE DETAIL MIN ------------ —� CABLE ACCESSORY I MAX �.-1.8 MIN CPENIfyG ARBITRARY POINT PARKING STAND (NOTE �? 1 HIGH -VOLTAGE CONNECTDRS CABLE AMESSDRY ' I 2 PARKING SUND � 2 MiA; � _� 3 Z MIN C t 1,/2 H 60°: 150 4 IN r 1B � _T x� SCABLE ACCESSORY 5-1 SEE EI:AIL A PARKING STAND E e SEE DEML A B kt 2�•iie: i �� 1 1 c [3 Hi.A (NOTE 8) 1{ 12 — _2i4 6Mihl,0 $:1 2 BASE BASE SILL PLANE L GROUND FAD IO ARBITRARY 4 P01AiT 1 .Stock`Number I Dimension A I'Dimension B I Dimension C I Dimension D I Dimension E I 368-120-155 13" 5" 4" 0" ( 3 W Figure 2 = Type 2 Transformer Dimensions and bushing Designations (not to scale) 13 368-120 APPENDIX B — DIMENSIONAL DRAWINGS 40' MAX 28' MIN 1 31' 5' 5' W 1 3'G' 1 3% 316, 4V MIN MIN MIN I MIN I MIN i MIN MIN MIN l - H1A H1B X3 1ABLE 4CCUL50RY x<[ z PARKING STAND X2 N N GROUND PAD•. MAX. KVA RADIATORS RADIATORS 25 & 50 32.5" - 100 -- 42' 167 42' 53' 250 44' S5' X1 REV. SYM: FF A IIN ING* 1 4V MIN }1 I 32'mox 1 18'f2' + MINIMUM OPENING IN BOTTOM OF COMPARTMENT FOR CADLE ENTRANCE Figure 1 — Type 1 Transformer Dimensions and bushing Designations (not to scale) 12 36&120 REV. SYM: FF Pad Dimensions This drawing is not intended to dictate requirements for items purchased under Specification 368-120 but is included as an aid to those users desiring a minimum of pad designs for the transformers covered by Specification 368-120. The dimensions in inches of Figure 3 will fit the minimum compartments on transformers covered by this Specification as well as the maximum transformer envelope. 48' —13' 48" F3" / / -T 12" PRIMARY SECONDARY 41/2" FRONT _—J T2" 15' — 6- — — 12" 15" --� /� FOUR R3 REBAR 18" LENGTH AND WIDTH — 3" 7 112" T Notes on Pad Material - 1. Concrete must be 3,000 psi minimum. 2. Maximum coarse aggregate size 1 1/2 inches. Space requirements for pad and primary switching cabinet will generally be 9' X 12'. Factors to be considered in locating the pad include - 1. Accessibility - The transformer pad shall be accessible to line boom trucks equipped for the installation and removal of heavy transformers. Such accessibility shall not require 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 two (2) 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. Figure 3 — Pad Dimensions 14 368-120 REV. SYM: FF APPENDIX C — Approved Manufacturers Transformers purchased under this Specification shall be of the make shown below. Manufacturers not listed below may submit written proposals demonstrating compliance with these Specifications for consideration of addition to the accepted manufacturers list prior to the next request for bids. In addition to inclusion on the list below, manufacturer's equipment must also satisfy all requirements of this Specification to be acceptable. MANUFACTURER SERIAL NO. ABB 0 Cooper Power Systems All General Electric All Howard Industries 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. 15 368-120 REV. SYM: FF TRANSFORMER LOSS EVALUATION - AVERAGE LOSSES City Order No. S/N Manufacturer Invoice No. KVA/Unit LINE DESCRIPTION AMOUNT (1) No. of units (2) Average core losses (3) Quoted core losses (4) Excess average core losses: line (2) less line (3) (5) Penalty for excess average core losses: line ('I ) x line (4) x $ (6) Average copper losses (7) Quoted copper losses (8) Excess average copper losses: line (6) less line (7) (9) Penal ttyy for excess average copper losses: line (1) x line (8) x $ (10) Penalty to be assessed manufacturer: line (5) plus line (9) but not less than zero Date Prepared By: Design Engineering NOTE: If any unit(s) exceeds the loss tolerances of ANSI C57.12.00, Light & Power will either reject it, include it on these averages, or calculate losses using the Individual Transformer Losses Evaluation Form, whichever is most favorable to Light and Power. 16 368-120 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 (12) line (9) less line (10) but not less than zero (12) Penalty for excess core losses line (3) x $ (13) Penalty for excess copper losses line (11) x $ (14) Penalty to be assessed manufacturer line (12) plus line (13) Date Prepared By: Design Engineering REV. SYM: FF 17 368-120 From: Shonna Banke To: ourchasino Subject: Bids 7182 & 7183 Date: Thursday, November 11, 2010 9:51:03 AM Attachments: Irby Bid 7183.xls Irby Bid 7182.xls KMBT25020101111094225.odf KMBT25020101111094236.odf Opal, Please find attached Irby's pricing for bid 7182 and 7183. Please also note below the exceptions that will be taken. SPECIFICATION CLARIFICATIONS/ EXCEPTIONS See below for the technical clarifications and/or exceptions to the specification and the request for quote information provided. Spec Section 3.1.3.4: Adding coal tar epoxy undercoating to the bottom of the unit does not enhance the corrosion properties of the paint system and shall not be provided. Spec Section 3.2.2.7.6: 3 Internal liquid level markings shall not be supplied. Fluid level shall be indicated by the oil fill provision Spec Section 3.2.2.13: Coatings and surface preparation system shall be Cooper Power System's standard, which is in compliance with ANSI/IEEE C57.12.28-2005 performance requirements. Tank exterior shall be Munsell 7GY3.29/1.5 Green. Total dry film paint thickness shall be a minimum of 3 mils. Feel free to contact me with any questions. Thank you, Shonna Banke Strategic Accounts Coordinator Stuart C. Irby Br. 573 4720 Lima St. Denver, CO 80239 VOIP: 81363010 Phone: (303) 576-0656 Fax: (303) 576-0729 banke@irby.com CONFIDENTIALITY WARNING: This email may contain confidential or proprietary business information and is for the sole use of the intended recipients) Any unauthorized use or disclosure of this communication, including attachments, is strictly prohibited. If you believe that you have received this email in error, please notify the sender immediately and delete it from your system. Issued: 8/17/72 Revised: 1/21/94 Special Conditions and Supplemental Instructions to Bidders Applicable to Specification 368-120 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. A typical list of users of 1 phase padmounted distribution class transformers manufactured by the bidder during the past five years. 2. A typical drawing 'of the transformers showing that they will meet the critical dimensions required by the Specification. 3. Impedance volts in % at full load, high voltage to low voltage at 850C. 4. No load and total losses at 850C. 5. Delivery in weeks. 6. A statement indicating compliance with our Specification without exception or a detailed list of exceptions. 7. Escalation is _.is not _applicable for the transformers bid. If escalation applies, the Bidder shall indicate in his bid the specific items or materials subject to escalation, and shall give the method and indices to be used in computing the amount thereof. Escalation occurring after the quoted delivery date will not be paid unless delays are the result of actions by the City. Escalation occurring after acceptance, if Purchaser exercises the option to delay shipment after manufacturing is completed, will not be paid. 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: No load or excitation losses at $3.90/watt. 2. Load losses at $1.50/watt. C. Shipping Terms Ship F.O.B. point of destination, freight prepaid. D. Terms of Payment I . 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 not accompany the invoice, late payment penalty charges incurred due to delays in obtaining the test reports will not be paid. Certified copies of test reports shall be sent to the Design Section, Fort Collins Light and Power Utility. 3. Loss penalty credits and escalation charges shall be itemized on the invoice. THE CITY OF FORT COLLINS Light and Power Department P.O. Box 580 Fort Collins, CO 80522 SPECIFICATION NO: 368-120 TITLE: PAD -MOUNTED COMPARTMENTAL -TYPE, SINGLE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE INSULATED LOAD BREAK HIGH -VOLTAGE CONNECTORS l APPROVED BY: ' Kraig E.(3adef Standards Engineering Manager ORIGINATED: 09/14l72 LAST REVISED: 7/21/2004 ITEMS COVERED BY THIS SPECIFICATION DESCRIPTION STOCK NO. SPECIFICATION NO. SERIAL 25 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -130 50 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -150 50 KVA, 120/240 ANSI Type 2 Transformer. 368-120 -155 100 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -170 167 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -180 250 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -190 REV. SYM: FF PREVIOUS REVISION DESCRIPTIONS ON FILE REVISION DESCRIPTION APPROVED REVISION DD: Sagen • Paragraph 3.2.2.7.5: Editorial 10/21/94 • Add paragraph 3.2.2.9.4 requiring pentahead locking bolts • Paragraph 3.2.2.13 add glossy to paint requirement • Paragraph 4.2.2: Clarify impedance requirement REVISION EE: Sagen • Paragraph 5.0: revised pallet size from 28 to 34 inches 2/25/98 REVISION FF Kraig Bader • Added 50kVA ANSI Type 2 Transformer (368-120-155) to Specification 7/21/2004 • Changed paint color to standard Munsell Green • Reorganized to consolidate impedance and fusing requirements into one table. • Consolidated secondary terminal requirements into one table. • Added maximum impedance requirement for 250kVA transformer (+/-7.5% from nominal for transformers with impedance greater than 2.5%) per ANSI/IEEE C57.12.00-2000. • Re-evaluated fusing requirements of all transformers in this specification. Went from dual sensing bay-o-net (expulsion) fuses to current sensing bay-o-net (expulsion) fuses. Fuse sizing was changed as follows: • Changed 25 kVA from 8A expulsion / 40 amp CL to 10A expulsion / 30A CL • Changed 50 kVA from 15A expulsion 180 amp CL to 15A expulsion / 40A CL • Changed 100 kVA from 25A expulsion 1175 amp CL to 25A expulsion 180A CL • Changed 167 kVA from 40A expulsion /200amp CL to 40A expulsion / 125A CL • Changed 250 kVA from 65A expulsion / 350amp CL to 65A expulsion / 125A CL 368-120 REV. SYM: FF TABLE OF CONTENTS PREVIOUS REVISION DESCRIPTIONS ON FILE...........................................................................................................................2 1 SCOPE...................................................................................................................................................................................................4 2 APPLICABLE DOCUMENTS............................................................................................................................................................4 2.1 ANSI C57.12.00 - DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS, AND SHUNT REACTORS, GENERAL REQUIREMENTS FOR.........................................................................................................................................................................................................4 2.2 ANSI C57.12.25 - PAD MOUNTED, COMPARTMENTAL -TYPE, SINGLE-PHASE, DISTRIBUTION TRANSFORMERS WITH SEPARABLE H-V CONNECTORS, STANDARD REQUIREMENTS FOR.......................................................................................................................................4 2.3 ANSI C57.12.28 - SWITCHGEAR AND TRANSFORMERS - PAD -MOUNTED EQUIPMENT -ENCLOSURE INTEGRITY ............................... 4 2.4 ANSI C57.12.70 - TERMINAL MARKINGS AND CONNECTIONS FOR DISTRIBUTION AND POWER TRANSFORMERS...............................4 2.5 ANSI C57.12.80 - TERMINOLOGY FOR POWER AND DISTRIBUTION TRANSFORMERS........................................................................4 2.6 ANSI C57.12.90 - DISTRIBUTION, POWER, AND REGULATING TRANSFORMERS, AND SHUNT REACTORS, TEST CODE FOR.................4 2.7 IEEE C57.91 - GUIDE FOR LOADING MINERAL -OIL -IMMERSED OVERHEAD AND PAD -MOUNTED DISTRIBUTION TRANSFORMERS RATED 500 KVA AND LESS WITH 650C OR 550C AVERAGE WINDING RISE..........................................................................................4 3 REQUIREMENTS................................................................................................................................................................................4 3.1 GENERAL REQUIREMENTS FOR DESIGN...............................................................................................................................4 3.2 SPECIFIC DESIGN REQUIREMENTS.......................................................................................................................................... 5 4 QUALITY ASSURANCE....................................................................................................................................................................9 4.1 GENERAL.......................................................................................................................................................................................9 4.2 TEST CONDITIONS.......................................................................................................................................................................9 4.3 NOT USED......................................................................................................................................................................................... 9 4.4 TESTS..............................................................................................................................................................................................9 5 PREPARATION FOR DELIVERY....................................................................................................................................................9 6 DEFINITIONS AND ABBREVIATIONS........................................................................................................................................10 APPENDIX A - TRANSFORMER STOCK NUMBER CODING...................................................................................................11 APPENDIX B - DIMENSIONAL DRAWINGS.................................................................................................................................12 PADDIMENSIONS..............................................................................................................................................................................14 APPENDIX C - APPROVED MANUFACTURERS.........................................................................................................................15 TRANSFORMER LOSS EVALUATION - AVERAGE LOSSES....................................................................................................16 INDIVIDUAL TRANSFORMER LOSS EVALUATION.................................................................................................................17 3 368-120 REV. SYM: FF SPECIFICATION FOR PAD -MOUNTED COMPARTMENTAL -TYPE SINGLE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE INSULATED LOAD BREAK HIGH VOLTAGE CONNECTORS 1 SCOPE This Specification establishes the minimum electrical requirements and mechanical features of single phase, 60 HZ, mineral oil immersed, self -cooled, pad -mounted, compartmental -type distribution transformers rated 250 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 with ANSI requirements for pad -mounted compartmental -type, self -cooled, single- phase, distribution transformers, C57.12.25. 2 APPLICABLE DOCUMENTS The following documents of the issue shown form a part of this Specification to the extent specified herein. In those cases when the document is note dated, the latest issue in effect on the date of invitation for bids shall form a part of this Specification. 2.1 ANSI C57.12.00 - Distribution, power, and regulating transformers, and shunt reactors, general requirements for. 2.2 ANSI C57.12.25 - Pad mounted, compartmental -type, single-phase, distribution transformers with separable H-V connectors, standard requirements for. 2.3 ANSI C57.12.28 - Switchgear and Transformers - Pad -Mounted Equipment -Enclosure Integrity. 2.4 ANSI C57.12.70 - Terminal markings and connections for distribution and power transformers. 2.5 ANSI C57.12.80 - Terminology for power and distribution transformers. 2.6 ANSI C57.12.90 - Distribution, power, and regulating transformers, and shunt reactors, test code for. 2.7 IEEE C57.91 - Guide for Loading Mineral -Oil -Immersed Overhead and Pad -Mounted Distribution Transformers Rated 500 kVA and Less with 65°C or 55°C Average Winding Rise. 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) Applicable ANSI Standards Approved manufacturers are listed in Appendix C. 4 368-120 REV. SYM: FF 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. The transformers shall be designed for overloads based on IEEE C57.91. 3.1.3 GENERAL CONSTRUCTION 3.1.3.1 The pad -mounted compartmental -type transformers shall consist of the transformer tank and high -and -low - voltage cable terminating compartment constructed in accordance with ANSI C57.12.25 and ANSI C57.12.28. The terminating compartment and tank 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. The cover shall be welded construction. 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 side 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 for Type 1 transformers shall be as shown in Figure 1, Appendix B. Minimum dimensions for Type 2 transformers shall be as shown in Figure 2, Appendix B. 3.2 SPECIFIC DESIGN REQUIREMENTS 3.2.1 FUNCTIONAL DESCRIPTION The transformer shall be a single phase, pad mounted, loop feed -safe break, "dead -front" type for use on a 13.8 kV grounded "Y" distribution system. 3.2.2 DESIGN AND CONSTRUCTION 3.2.2.1 RATING The transformer shall be rated as follows: a) High Voltage 13,200 Grd. Y/7620 volts b) Low Voltage 240/120 c) Taps Two - 2'Y.% FC above and below normal d) Polarity Additive e) Capacity, Impedance values, and fusing for transformers in this specification shall conform to Table 1: 5 368-120 REV. SYM: FF Table 1 — Transformer Capacity, Impedance and Fuse Selection Stock ` WA Min. Max. Bay-O-Net Current Limiting Fuse(s) Number Capacity Impedance Impedance Fused 368-120-130 25 1.77% 2.16% 10 Amp ELSP 354403OM61 M (30 A) 4000353C06 368-120-150 50 1.77% 2.16% 15 Amp ELSP 354304OM61 M (40 A) 4000353C08 368-120-155 50 1.77% 2.16% 15 Amp ELSP 354304OM61 M (40 A) 4000353C08 368-120-170 100 1.95% 2.38% 25 Amp ELSP 354308OM71 M (80 A) 4000353C10 368-120-180 167 2.28% 2.79% 40 Amp ELSP 3543125M71 M (125 A) 4000353C12 368-120-190 250 5.75% 6.61 % 65 Amp ELSP 3543125M71 M (125 A) 4000353C14 "The BAY-0-NET fuse shall be located in the high voltage side of the compartment. 3.2.2.2INSULATION LEVEL 3.2.2.2.1 The basic impulse insulation level (BIL) of completely assembled 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 Section 4 of ANSI C57.12.00. 3.2.2.3HIGH-VOLTAGE TAPS A no-load tap changer with external operating handle shall provide two - 2%% full capacity taps above and below normal. The tap changer operating handle shall be located within the high -voltage terminal side of the terminal compartment. 3.2.2.4 NOT USED 3.2.2.5BUSHING 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 or Fig. 2 in Appendix B. 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 the cover. Welded bushings and wells are expressly prohibited. 3.2.2.5.2 High -voltage terminals shall be universal flowerpot bushing wells in accordance with Figure 3 of ANSI/IEEE 386-1985. Two wells shall be provided and shall be connected in a feed -through configuration. Loadbreak bushing inserts in accordance with Figure 5 of ANSI/IEEE 386-1985 will be owner furnished. 3.2.2.5.3 Low -voltage line and neutral terminals shall be sized as shown in Table 2 in accordance with ANSI C57.12.25. Bushing arrangement and spacing shall be shown in Fig. 1 or Fig. 2 in Appendix B. Table 2 — Low Voltage Terminal Sizes Stock Number kVA CapacityCap6city Low volta ` e Terminal Size. 368-120-130 25 5/8" x 11" UNC-2A copper studs 368-120-150 50 5/8" x 11" UNC-2A copper studs 368-120-155 50 5/8" x 11" UNC-2A copper studs 368-120-170 100 1" x 14" UNC-2A copper studs 368-120-180 167 1" x 14" UNC - 2A copper studs 368-120-190 250 T/14" x 12 UNF - 2A copper studs. 3.2.2.5.4 The low -voltage Xz bushing shall be a fully insulated bushing. A ground pad shall be provided on the outer surface of the tank and an external removable copper ground strap shall be provided and connected between the low -voltage X2 bushing and the ground pad. 3.2.2.5.5 The high -voltage neutral shall be securely grounded internally. 6 368-120 REV. SYM: FF 3.2.2.6ACCESSORY CABINET 3.2.2.6.1 The accessory cabinet shall consist of a compartment containing high- and low -voltage bushings constructed in accordance with applicable ANSI specifications, including ANSI C57.12.28. Dimensions shall be in accordance with Fig. 1 of this specification. 3.2.2.6.2 Cabinet doors shall be hinged, removable, lockable, and of sufficient size to provide adequate working space when removed or open. Unlocking the padlock shall permit access to both the high- and low - voltage terminations. Stainless steel hinge pins shall be provided. 3.2.2.7ACCESSORY EQUIPMENT Accessory equipment shall be provided in accordance with the following details: 3.2.2.7.1 Deleted 3.2.2.7.2 The transformer base shall be arranged for rolling in two directions: Parallel to and at right angles to the center line of the high -voltage bushings. 3.2.2.7.3 Lifting lugs or bosses for screw -in lift bolts shall be provided. These lugs or bosses shall be adequate strength and size and arranged on the tank to provide a suitable balanced 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. land Figure 2, Appendix B). 3.2.2.7.5 Terminal designations are shown in Figure 1 and Figure 2, Appendix B. The identification of terminal connections shall be shown on the instruction nameplate. Instruction nameplate shall be located in the low -voltage side 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 5.12 of ANSI C57.12.00-1987, Nameplate A. Also, on the nameplate, or label affixed near it, the manufacturer shall indicate that the dielectric fluid contains less than 1 ppm PCB. 3.2.2.7.6 A suitable marking inside of the tank shall indicate the correct oil level at 25*C. 3.2.2.7.7 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 shear force minimum. • Bug shield. • Cracking pressure of 10 ± 2 psig. • Resealing pressure of 8 ± 2 psig. • Zero leak rate from 8 ± 2 psig to -8 psig. • Minimum flow rate of 35 SCFM at 15 psig. 3.2.2.7.8 An RTE BAY-O-NET current sensing fuse and internally mounted partial range current limiting fuse shall be furnished as shown in Table 1. 3.2.2.8OIL 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 -5°C to 105°C. 3.2.2.9 TANKS The tank shall be domed or sloped to shed water. The tank shall be of sufficient strength to support a minimum of 500 lbs. vertical load. Construction of the tank shall be in accordance with ANSI C57.12.25- 1981, paragraphs 6.1 and 6.6. 7 368-120