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Home My WebLink AboutBID - 8853 TRANSFORMERS 50 KVA PAD-MOUNTED1 INVITATION TO BID 8853 TRANSFORMERS, 50 KVA PAD-MOUNTED BID OPENING: 3:00 P.M. (our clock), January 30, 2019 The City of Fort Collins is requesting bids from firms for 50 KVA pad-mounted transformers. Bid submission via email is preferred. Required documents are 1. The Bid Spreadsheet, which shall be submitted in Excel format; and 2. The Bid Acknowledgement Form (Exhibit A – pdf or Word is fine). Other documents may be submitted in Word or pdf format. All documents are to be e-mailed to: purchasing@fcgov.com. The City encourages all disadvantaged business enterprises to submit bid in response to all invitations to bid. No individual or business will be discriminated against on the grounds of race, color, sex, or national origin. It is the City’s policy to create a level playing field on which DBEs can compete fairly and to ensure nondiscrimination in the award and administration of all contracts. Any questions or inquiries regarding this bid should be directed to: Marisa Donegon, Buyer, at mdonegon@fcgov.com no later than 5:00 pm MST on January 23, 2019. A copy of the Bid may be obtained at www.rockymountainbidsystem.com. The City of Fort Collins is subject to public information laws, which permit access to most records and documents. Proprietary information in your response must be clearly identified and will be protected to the extent legally permissible. Proposals may not be marked ‘Proprietary’ in their entirety. All provisions of any contract resulting from this request for proposal will be public information. Special Instructions All bids must be properly signed by an authorized representative of the company with the legal capacity to bind the company to the agreement. Bids may be withdrawn up to the date and hour set for closing. Once bids have been accepted by the City and closing has occurred, failure to enter into contract or honor the purchase order will be cause for removal of supplier's name from the City of Fort Collins' bidders list for a period of twelve months from the date of the opening. The City may also pursue any remedies available at law or in equity. Bid prices must be held firm for a period of forty-five (45) days after bid openings. Submission of a bid is deemed as acceptance of all terms, conditions and specifications contained in the City's specifications initially provided to the bidder. Any proposed modification must be accepted in writing by the City prior to award of the bid. Only bids properly received by the Purchasing Office will be accepted. All bids should be clearly Financial Services Purchasing Division 215 N. Mason St. 2nd Floor PO Box 580 Fort Collins, CO 80522 970.221.6775 970.221.6707 fcgov.com/purchasing 2 identified by the bid number and bid name contained in the bid proposal. No proposal will be accepted from, or any purchase order awarded, to any person, firm or corporation in default on any obligation to the City. Bids must be furnished exclusive of any federal excise tax, wherever applicable. Bidders must be properly licensed and secure necessary permits wherever applicable. The City may elect where applicable, to award bids on an individual item/group basis or on a total bid basis, whichever is most beneficial to the City. The City reserves the right to accept or reject any and all bids, and to waive any irregularities or informalities. Sales prohibited/conflict of interest: no officer, employee, or member of City Council, shall have a financial interest in the sale to the City of any real or personal property, equipment, material, supplies or services where such officer or employee exercises directly or indirectly any decision- making authority concerning such sale or any supervisory authority over the services to be rendered. This rule also applies to subcontracts with the City. Soliciting or accepting any gift, gratuity, favor, entertainment, kickback or any items of monetary value from any person who has or is seeking to do business with the City of Fort Collins is prohibited. Freight terms: unless otherwise noted, all freight is F.O.B. Destination, Freight Prepaid. All freight charges must be included in prices submitted on proposal. Discounts: any discounts allowed for prompt payment, etc., must be reflected in bid figures and not entered as separate pricing on the proposal form. Purchasing restrictions: your authorized signature of this bid assures your firm's compliance with the City's purchasing restrictions. A copy of the resolutions is available for review in the Purchasing Office or the City Clerk's Office. Request Resolution 91-121 for cement restrictions. Collusive or sham bids: any bid deemed to be collusive or a sham bid will be rejected and reported to authorities as such. Your authorized signature of this bid assures that such bid is genuine and is not a collusive or sham bid. New Vendors: The City requires new vendors receiving awards from the City to fill out and submit an IRS form W-9 and to register for Direct Deposit (Electronic) payment. If needed, the W-9 form and the Vendor Direct Deposit Authorization Form can be found on the City’s Purchasing website at www.fcgov.com/purchasing under Vendor Reference Documents. Gerry S. Paul Director of Purchasing 3 8853 TRANSFORMERS, 50KVA PAD-MOUNTED WE HEREBY ENTER OUR BID FOR THE CITY OF FORT COLLINS' REQUIREMENTS FOR TRANSFORMERS, 50 KVA PAD-MOUNTED PER THE BID INVITATION AND ANY REFERENCED SPECIFICATIONS. QUANTITY: DESCRIPTION: 30 ea. 120-150 Transformer, 50 KVA pad-mounted, ANSI Type 1, compartmental type, single phase distribution with separable insulated load break high voltage connectors. High voltage rating: 13200 grdy/7620. Low voltage rating: 240/120. SERIAL NUMBER 150 TO BE IN ACCORDANCE WITH SPECIFICATION #368-120-150, REVISION HH Please complete the Excel spreadsheet issued separately for bid submittal. The spreadsheet MUST be submitted in Excel format only. Failure to submit in the format requested may cause the submittal to be deemed incomplete and may be subject to rejection. IF YOU ELECT TO PASSWORD PROTECT YOUR BID, PLEASE NOTE THAT PASSWORD IN A SEPARATE EMAIL TO purchasing@fcgov.com at the time of bid submittal. *Any surcharges or additional costs shall be noted & included in bid submittal. For purposes of warranty and service ONLY approved manufacturers or distributors authorized by an approved manufacturer to serve the Fort Collins area may bid. Awards from this bid will be based primarily on the evaluated bid price. Delivery lead times, escalation and exceptions taken will also be considered. The City of Fort Collins reserves the right to split the bid award in whatever percentages are most advantageous to the City. Future orders of 50 KVA Pad-Mounted Transformers may be authorized, at the option of the City, from this bid for a period of five years after bid closing date. Satisfactory pricing, losses and delivery are required for future orders based on this bid. 4 EXHIBIT A BID ACKNOWLEDGEMENT Contractor hereby acknowledges receipt of the City of Fort Collins Utilities’ Request for Bids for the 8853 50 KVA Transformer and acknowledges that it has read and agrees to be fully bound by all of the terms, conditions and other provisions set forth in the Bid. Additionally, the Contractor hereby makes the following representations to Utilities: a. All of the statements and representations made in this bid are true to the best of the Contractor’s knowledge and belief. b. The Contractor has obtained all necessary authorizations and approvals that will enable the Contractor to commit to the terms provided in this bid submittal. c. This bid submittal is a firm and binding offer, for a period of 45 days from the date hereof. d. I further agree that the method of award is acceptable to my company. e. I acknowledge receipt of addenda. Contractor Firm Name: Physical Address: Remit to Address: Phone: Authorized Agent of Firm Name: Signature of Authorized Agent: Primary Contact for Project: Title: Email Address: Phone: Cell Phone: THE CITY OF FORT COLLINS Light and Power Department P.O. Box 580 Fort Collins, CO 80522 SPECIFICATION NO: 368-120 PAD-MOUNTED COMPARTMENTAL-TYPE, SINGLE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE INSULATED LOAD BREAK HIGH-VOLTAGE CONNECTORS UPDATED BY: Adam Bromley Senior Electrical Engineer APPROVED BY: Kraig E. Bader Standards Engineering Manager ORIGINATED: 09/14/72 LAST REVISED: 31 May 2016 ITEMS COVERED BY THIS SPECIFICATION DESCRIPTION STOCK NO. SPECIFICATION NO. SERIAL Mild Steel Tank Stainless Steel Tank 25 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -130 -131 50 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -150 -151 100 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -170 -171 167 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -180 -181 250 KVA, 120/240 ANSI Type 1 Transformer. 368-120 -190 -191 REV. SYM: HH 2 368-120 PREVIOUS REVISION DESCRIPTIONS ON FILE REVISION DESCRIPTION APPROVED REVISION DD:  Paragraph 3.2.2.7.5: Editorial  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 Sagen 10/21/94 REVISION EE:  Paragraph 5.0: revised pallet size from 28 to 34 inches Sagen 2/25/98 REVISION FF  Added 50kVA ANSI Type 2 Transformer (368-120-155) to Specification  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 / 80 amp CL to 15A expulsion / 40A CL  Changed 100 kVA from 25A expulsion / 175 amp CL to 25A expulsion / 80A 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 Kraig Bader 7/21/2004 REVISION GG  Deleted ANSI Type 2, 50 kVA, transformers from the Specification. Fort Collins is no longer purchasing Type 2 transformers because most maintenance situations require Type 1 bushing heights.  Updated all references from ANSI to IEEE standards. The standards development process utilized by IEEE is approved by ANSI, so they do not explicitly place their name on each standard anymore.  Eliminated “Not Used” sections.  Updated references to IEEE C57.12.25, which is no longer active, to now reference IEEE C57.12.38 and the corresponding sections and figures within the new standard.  Added IEEE C57.12.37 – Electronic Reporting of Distribution Transformer Test Data as a reference standard. Amended section 5.1.2 to include details for the application of IEEE C57.12.37.  Added “Operation Test” to the required design tests contained within C57.12.28 to Section 3.1.3.2.  Added section on DOE Energy Efficiency Requirements.  Amended section 3.2.2.4.3 to require that locking nuts be provided on all low-voltage line and neutral terminals. Adam Bromley Kraig Bader 4/3/2013 REV. SYM: HH 3 368-120  Amended section 3.2.2.6.6 to specify a pressure relief device that includes detection and indication of internal transformer faults. The approved device is manufactured by IFD Corporation.  Moved and updated section on Losses (now Section 4) to include new required information to be submitted by manufacturers during the bid process. Additional information to be supplied includes expected winding’s stray losses and losses associated with auxiliary devices such as fuses, breakers, switches, etc. Also updated Special Conditions and Supplemental Instructions to Bidders with new required losses information.  Removed General Electric as an approved manufacturer and added Central Moloney to the Conditionally Approved Manufacturers list.  Deleted Individual Transformer Loss Evaluation Form. Typically, orders include more than one unit and the average form is used. Fort Collins Utilities has always and continues to reserve the right to calculate losses and assess penalties individually, if favorable to Fort Collins Utilities.  Added Special Conditions and Supplemental Instructions to Bidders to the end of this specification. Previously, this had been submitted to Bidders separately. This merge helps to maintain consistency among transformer specifications. REVISION HH  Updated section on DOE Energy Efficiency requirements with new 2016 standards.  Updated “TANKS” section to include applicable sections from IEEE C57.12.38 instead of the archived version of this standard, C57.12.25.  Added stock numbers and requirements for single phase transformers constructed with stainless steel tanks.  Added IEEE C57.12.29 – Enclosure Integrity for Coastal Environments as a reference for the stainless steel constructed transformers.  Added requirement (3.2.2.16) for secondary voltage to be stenciled or painted onto the front face of the accessory cabinet. This label shall be permanent.  Updated date on specific references to sections within C57.12.37 from 2006 to 2015 revision.  Moved Central Moloney from Conditionally Approved to Approved Manufacturers list. CM has produced satisfactory single phase padmounted transformers for us.  Removed 368-120-155 from Table 1 as it is no longer purchased as a preferred option and was removed from specification as part of revision GG. Adam Bromley Kraig Bader 31 May 2016 REV. SYM: HH 4 368-120 TABLE OF CONTENTS PREVIOUS REVISION DESCRIPTIONS ON FILE ................................................................................................................ 2 1 SCOPE ................................................................................................................................................................................. 5 2 APPLICABLE DOCUMENTS .............................................................................................................................................. 5 3 REQUIREMENTS ................................................................................................................................................................ 5 3.1 GENERAL REQUIREMENTS FOR DESIGN ................................................................................................................. 5 3.2 SPECIFIC DESIGN REQUIREMENTS .......................................................................................................................... 6 4 LOSSES ............................................................................................................................................................................. 10 5 QUALITY ASSURANCE .................................................................................................................................................... 10 5.1 GENERAL .................................................................................................................................................................... 10 5.2 TEST CONDITIONS .................................................................................................................................................... 11 5.3 TESTS ......................................................................................................................................................................... 11 6 PREPARATION FOR DELIVERY ..................................................................................................................................... 11 7 DEFINITIONS AND ABBREVIATIONS ............................................................................................................................. 11 APPENDIX A – TRANSFORMER STOCK NUMBER CODING .......................................................................................... 13 APPENDIX B – DIMENSIONAL DRAWINGS ...................................................................................................................... 14 APPENDIX C – APPROVED MANUFACTURERS .............................................................................................................. 16 TRANSFORMER LOSS EVALUATION - AVERAGE LOSSES .......................................................................................... 16 SPECIAL CONDITIONS AND SUPPLEMENTAL INSTRUCTIONS TO BIDDERS APPLICABLE TO SPECIFICATION 368-120 ................................................................................................................................................................................. 18 REV. SYM: HH 5 368-120 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, dielectric fluid-immersed, self-cooled, pad-mounted 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 to IEEE requirements for pad-mounted-type, self-cooled, single-phase, distribution transformers, C57.12.38. 2 APPLICABLE DOCUMENTS The following documents form a part of this Specification to the extent specified herein. In those cases when the document is not dated, the latest issue in effect on the date of invitation for bids shall form a part of this Specification.  IEEE C57.12.00 – Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers  IEEE C57.12.28 – Standard for Pad-Mounted Equipment – Enclosure Integrity  IEEE C57.12.29 – Standard for Pad-Mounted Equipment – Enclosure Integrity for Coastal Environments  IEEE C57.12.37 – Standard for the Electronic Reporting of Distribution Transformer Test Data  IEEE C57.12.38 – Standard for Pad-Mounted-Type, Self-Cooled, Single-Phase Distribution Transformers; High Voltage, 34 500 GrdY/19 920 V and Below, Low Voltage, 240/120 V; 167 kVA and Smaller  IEEE C57.12.70 – Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers  IEEE C57.12.80 – Standard Terminology for Power and Distribution Transformers  IEEE C57.12.90 – Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers  IEEE C57.91 – Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators  IEEE 386 – Separable Insulated Connectors for Power Distribution Systems above 600 V 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 IEEE 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 IEEE 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. The transformers shall be designed for overloads based on IEEE C57.91. 3.1.3 GENERAL CONSTRUCTION 3.1.3.1 The pad-mounted-type transformers shall consist of a transformer tank and a high and low-voltage cable terminating compartment constructed in accordance with IEEE C57.12.28 and C57.12.38. The REV. SYM: HH 6 368-120 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 In addition to the enclosure security design tests listed in Section 4.3.1 of IEEE C57.12.28, the manufacturer shall perform an “Operation test”. The unit shall be lifted, utilizing provided lifting lugs, at least one meter in accordance with the manufacturer’s standard lift instructions and then set again on a flat surface. The doors shall be easily opened, closed, latched and locked without requiring adjustments to the cabinet, latch mechanism and/or enclosure door(s). All of the door latch points must fully engage when the door is closed. 3.1.3.3 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. 3.1.3.4 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. 3.1.3.5 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. 3.1.3.6 Minimum dimensions for Type 1 transformers shall be as shown in Figure 1, Appendix B. 3.1.4 ENERGY EFFICIENCY Transformers shall be designed to meet the minimum energy efficiency ratings defined in the United States Department of Energy April 18, 2013 Final Rule: 10 CFR Part 431, Energy Conservation Program: Energy Conservation Standards for Distribution Transformers (i.e. DOE 2016 energy efficiency standards). 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 - 2½% FC above and below normal d) Polarity Additive e) Capacity, Impedance values, and fusing for transformers in this specification shall conform to Table 1. 3.2.2.2 OVERCURRENT PROTECTION An RTE / Cooper Power Systems BAY-O-NET current sensing fuse and internally mounted partial range current limiting fuse shall be furnished as shown in Table 1. REV. SYM: HH 7 368-120 Table 1 – Transformer Capacity, Impedance and Fuse Selection Stock Number kVA Capacity Min. Impedance Max. Impedance Bay-O-Net Fuse1,2 Current Limiting Fuse(s)2 368-120-130 368-120-131 25 1.77% 2.16% 10 Amp 4000353C06 ELSP 3544030M61M (30 A) 368-120-150 368-120-151 50 1.77% 2.16% 15 Amp 4000353C08 ELSP 3543040M61M (40 A) 368-120-170 368-120-171 100 1.95% 2.38% 25 Amp 4000353C10 ELSP 3543080M71M (80 A) 368-120-180 368-120-181 167 2.28% 2.79% 40 Amp 4000353C12 ELSP 3543125M71M (125 A) 368-120-190 368-120-191 250 5.75% 6.61% 65 Amp 4000353C14 ELSP 3543125M71M (125 A) 1 The BAY-O-NET fuse shall be located in the high voltage side of the compartment. 2 The approved manufacturer for the fuses is Cooper Power Systems. Other fuses meeting the requirements defined in this specification shall be specifically approved in writing by Fort Collins Utilities Engineering Standards Division 3.2.2.3 INSULATION LEVEL 3.2.2.3.1 The basic impulse insulation level (BIL) of completely assembled high-voltage and low-voltage terminals shall be 95 kV and 30 kV respectively. 3.2.2.3.2 Dielectric test levels shall be in accordance with the distribution levels in Section 4 of ANSI C57.12.00. 3.2.2.4 HIGH-VOLTAGE TAPS A no-load tap changer with external operating handle shall provide two - 2½% 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. 3.2.2.5 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 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 bushing wells shall be 200 A load-break interface 8.3/14.4 kV bushings in REV. SYM: HH 8 368-120 3.2.2.6 ACCESSORY 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 IEEE specifications, including IEEE 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. 3.2.2.7 ACCESSORY EQUIPMENT Accessory equipment shall be provided in accordance with the following details: 3.2.2.7.1 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. 3.2.2.7.2 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. 3.2.2.7.3 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, Appendix B). 3.2.2.7.4 Terminal designations are shown in Figure 1, 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 IEEE C57.12.00-2010. Also, on the nameplate, or label affixed near it, the manufacturer shall indicate that the dielectric fluid contains less than 1 ppm PCB. 3.2.2.7.5 A suitable marking inside of the tank shall indicate the correct oil level at 25°C. 3.2.2.7.6 A non-resettable device which detects and provides external indication of internal transformer faults, as well as incorporating automatic pressure relief functionality shall be provided. The pressure relief device shall meet the following requirements:  ¼" 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 a static force of 25 pounds for 1 minute without permanent deformation. The valve shall also withstand for 1 minute a static force of 100 lbf applied normal to its longitudinal axis at the outermost extremity of the body.  Bug shield to prevent entry of dust, moisture, and insects before and after the valve has operated.  Cracking pressure of 10 ± 2 psig.  Resealing pressure of 8 ± 2 psig.  Zero leakage from resealing pressure to -8 psig.  Minimum flow rate of 35 SCFM at 15 psig. The approved manufacturer for this device is IFD Corporation. Other devices meeting the requirements defined in this specification shall be specifically approved in writing by Fort Collins Utilities Engineering Standards Division. REV. SYM: HH 9 368-120 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 -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 sections 7 and 10 of IEEE C57.12.38. 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 ½ 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. 3.2.2.9.5 Tank material utilized to construct the transformer tanks for the various stock numbers shall be as shown in Table 3. Table 3 – Transformer Tank Material Stock Number kVA Capacity Rating Tank Material 120-130 25 Carbon Steel 120-131 Stainless Steel – 304L 120-150 50 Carbon Steel 120-151 Stainless Steel – 304L 120-170 100 Carbon Steel 120-171 Stainless Steel – 304L 120-180 167 Carbon Steel 120-181 Stainless Steel – 304L 120-190 250 Carbon Steel 120-191 Stainless Steel – 304L 3.2.2.10 STAINLESS STEEL TANKS This section describes the additional requirements for transformer tanks constructed with stainless steel. 3.2.2.10.1 All portions of the transformer tank (tank, accessory cabinet, hinges, lifting lugs, etc.) shall be manufactured of 304L stainless steel. During the tank manufacturing process, it is preferred that all stainless steel working/bending should be done on presses specifically utilized for stainless steel. 3.2.2.10.2 The pad-mounted-type transformers manufactured with 304L stainless steel shall consist of a transformer tank and a high and low-voltage cable terminating compartment constructed and tested in accordance with IEEE C57.12.29. 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 TR1-1980. 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. 1B. 3.2.2.14 PAINT EEI "Finishing Guidelines" specification shall apply. Finish coat shall be Munsell Green, glossy. REV. SYM: HH 10 368-120 3.2.2.15 SAFETY LABELS NEMA 1260 Safety Labels shall not be applied by the manufacturer; Purchaser will apply custom warning labels after delivery. 3.2.2.16 SECONDARY VOLTAGE LABEL The manufacturer shall stencil or paint the secondary voltage on the front face of the accessory cabinet for identification purposes. This label shall remain clearly visible for the life of the transformer. 4 LOSSES The total losses of a transformer shall be the sum of the excitation losses and the load losses (I2R losses). Load loss tests shall be performed and reported on all units regardless of whether or not a record of such tests is available on duplicate units. Loss evaluations and loss costs will be based on the values shown in the “Special Conditions and Supplemental Instructions to Bidders.” Transformers will be evaluated on excitation losses and I2R losses at the specified rates. If tested losses exceed quoted losses but are within the tolerances of paragraph 9.3, IEEE C57.12.00-2010, 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, IEEE C57.12.00-2010, 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. Quoted losses submitted by manufacturers shall include the following:  No load losses  Full load losses – it shall be clearly stated whether this number includes the winding’s expected stray losses and losses associated with auxiliary devices  Winding’s expected stray losses related to quoted transformer design  Losses associated with auxiliary devices such as fuses, breakers, switches, etc. All quoted loss values shall be corrected to a reference temperature of 85˚C. Quotations submitted during the bid process without the required losses information shall be deemed unresponsive and are subject to rejection by the City of Fort Collins. 5 QUALITY ASSURANCE 5.1 GENERAL 5.1.1 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 Utilities. The City reserves the right to perform or witness any of the inspections set forth in this Specification where such inspections are deemed necessary. 5.1.2 TEST REPORT The manufacturer shall furnish to the purchaser, prior to payment, electronic reports including transformer test data as specified in IEEE C57.12.37. Unsigned copies are not acceptable even if accompanied by a signed cover letter. The manufacturer’s Quality Control Manager shall review and approve each test report. The electronic reports shall include the standard data set and the extended data set as specified in sections REV. SYM: HH 11 368-120 4.2 and 4.3, respectively, of IEEE C57.12.37-2015. These reports shall be formatted in a comma delimited file as specified in section 5.3 of IEEE C57.12.37-2015. These reports shall be sent to the following E-mail address: standardsengineering@fcgov.com . 5.2 TEST CONDITIONS Unless otherwise specified, testing required by Section 5.4 shall be conducted under the following conditions: 5.2.1 REFERENCE TEMPERATURE The reference temperature to which losses, impedance, regulation, and efficiency are corrected shall be 85°C. 5.2.2 TOLERANCE ON IMPEDANCE VOLTAGE Impedance on completed units shall fall within the range specified herein. 5.2.3 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. 5.3 TESTS The kinds of tests to be performed and the test procedures shall be as specified in IEEE C57.12.20, IEEE C57.12.00, and C57.12.90 except as specified herein. 5.3.1 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. 5.3.2 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. 6 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 on two-way pallets or four-way universal pallets with 30” minimum openings (to accommodate minimum fork spacing) and loaded on the truck for side removal. 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 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. 7 DEFINITIONS AND ABBREVIATIONS Vendor or Supplier - The manufacturer and/or manufacturer's 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)  °F - Degree Fahrenheit  kV - 1000 volts. REV. SYM: HH 12 368-120  CPS or Hz - Cycles per second.  psig - Pounds per square inch gauge.  V or v - Volts.  KVA - 1000 Volt-amperes. REV. SYM: HH 13 368-120 APPENDIX A – Transformer Stock Number Coding Below are examples that demonstrate the coding method used by City of Fort Collins to establish transformer stock numbers. I. SINGLE PHASE Example #1: 368 - 1 BC - X Y Z II. THREE PHASE Example #2 368 – 3 AB - XYZ Used to identify other characteristics KVA 0 = 5 5 = 50 1 = 10 6 = 75 2 = 15 7 = 100 3 = 25 8 = 167 4 = 37.5 9 = 250 1 = single voltage 2 = dual voltage Transformer Class 00 = 13.2Y/7620 & 7620/13.2Y x 2400/4160 outside pole 05 = 13.2Y7620 ESNA pole 10 = 13.2Y/7620 ESNA Submersible 20 = 13.2Y/7620 ESNA pad Single Phase 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.) Transformer 3 Phase 00 = Padmount 10 = Submersible REV. SYM: HH 14 368-120 APPENDIX B – DIMENSIONAL DRAWINGS Figure 1 – Type 1 Transformer Dimensions and bushing Designations (not to scale) REV. SYM: HH 15 368-120 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 2 will fit the minimum compartments on transformers covered by this Specification as well as the maximum transformer envelope. Figure 2 – Pad Dimensions 3" 3" 3" LENGTH AND WIDTH FOUR #3 REBAR 3" 3" FRONT 12" PRIMARY SECONDARY 12" 4 1/2" 18" 48" 48" 7 1/2" 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. 2" 15" 6" 15" REV. SYM: HH 16 368-120 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. Approved manufacturers must have constructed and submitted prototype units for inspection and deemed satisfactory by the Fort Collins Utilities Electric Department. APPROVED MANUFACTURERS ABB Cooper Power Systems Howard Industries Central Moloney 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. In order to be added to the Conditionally Approved List, the manufacturer shall submit drawings demonstrating that their design meets technical and dimensional requirements contained within this Specification. 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, dependent upon the current needs of the City for that item or items. CONDITIONALLY APPROVED MANUFACTURERS REV. SYM: HH 17 368-120 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 (1) x line (4) x $____________ ________ (6) Average copper losses ________ (7) Quoted copper losses ________ (8) Excess average copper losses: line (6) less line (7) ________ (9) Penalty for excess average copper losses: line (1) x line (8) x $_______________ ________ (10) Penalty to be assessed manufacturer: line (5) plus line (9) but not less than zero ________ Date ______________________________ Prepared By: _____________________________ Design Engineering NOTE: If any unit(s) exceeds the loss tolerances of IEEE C57.12.00, Utilities Electric Department will (1) either reject it, (2) include it on these averages, or (3) calculate losses and assess penalties individually, whichever is most favorable to Utilities Electric Department. REV. SYM: HH 18 368-120 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. Impedance volts in percent (%) at full load, high voltage to low voltage at 85°C 2. No load losses, full load losses, total losses, expected winding’s stray losses, auxiliary devices’ losses all corrected to a reference of 85°C. Please see Section 4 – Losses for more information. 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 $1.50/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. Electronic test reports as describe in Section 5.1.2 sent via E-mail shall accompany the invoice sent to the Material Control Section. 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. Electronic test reports shall also be sent via E-mail to Engineering Standards Division, Fort Collins Utilities - Light & Power. 3. Loss penalty credits and escalation charges shall be itemized on the invoice. accordance with IEEE 386. Two wells shall be provided and shall be connected in a feed-through configuration. Loadbreak bushing inserts in accordance with IEEE 386 will be purchaser furnished. 3.2.2.5.3 Low-voltage line and neutral terminals shall be sized as shown in Table 2 in accordance with IEEE C57.12.38. Bushing arrangement and spacing shall be as shown in Fig. 1 in Appendix B. All low- voltage line and neutral terminals shall be equipped with locking nuts. Table 2 – Low Voltage Terminal Sizes 3.2.2.5.4 The low-voltage X2 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. kVA Capacity Low voltage Terminal Size 25 5/8" x 11” UNC-2A copper studs 50 5/8" x 11” UNC-2A copper studs 100 1” x 14” UNC-2A copper studs 167 1" x 14” UNC - 2A copper studs 250 1¼" x 12 UNF - 2A copper studs.