CONSOLIDATED EDISON COMPANY OF NEW YORK, INC. 4 IRVING PLACE NEW YORK, NY ORANGE & ROCKLAND UTILITIES 390 WEST ROUTE 59 SPRING VALLEY, NY 10977

Transcription

1 CONSOLIDATED EDISON COMPANY OF NEW YORK, INC. 4 IRVING PLACE NEW YORK, NY ORANGE & ROCKLAND UTILITIES 390 WEST ROUTE 59 SPRING VALLEY, NY DISTRIBUTION ENGINEERING DEPARTMENT SPECIFICATION EO-5015 REVISION 22 JULY 2015 EFFECTIVE DATE AUGUST 31, 2015 PURCHASE REQUIREMENT FOR THREE PHASE, OIL FILLED, METAL ENCLOSED, PAD-MOUNTED TRANSFORMERS (FOR CECONY AND ORANGE AND ROCKLAND) FILE: PURCHASE AND TEST MANUAL NO. 6, SECTION 25 FIELD MANUAL NO 22, SECTION NO. 8 TARGET AUDIENCE NESC REFERENCE PURCHASING DEPARTMENT NONE Copyright Information Consolidated Edison Co. of New York, Inc. Paper copies of procedures and instructions are uncontrolled and therefore may be outdated. Please consult Distribution 1/47 Engineering Intranet Site Distribution Engineering or for the current version prior to use.

2 TABLE OF CONTENTS 1.0 PURPOSE GENERAL ELECTRICAL REQUIREMENTS MECHANICAL REQUIREMENTS FEEDER AND BANK TAG HOLDER IDENTIFICATION ACCESSORIES INVITATION TO BID MANUFACTURER S PROPOSAL SUBMITTAL EVALUATION OF PROPOSALS AWARDING OF CONTERACTS PURCHASE ORDERS INSPECTIONS AND TESTS CERTIFIED TEST REPORTS COMPANY INSPECTIONS AND TESTS DELIVERY WARRANTY AND UNIT RETURNED UNDER WARRANTY SHIPPING AND TRANSPORTATION REFERENCES APPENDIX ATTACHMENTS Specification Revision Rev Effective Copyright Information 2/47

3 1.0 PURPOSE PURCHASE REQUIREMENT FOR THREE PHASE, OIL FILLED, METAL ENCLOSED, PAD MOUNT TRANSFORMERS 1.1 This specification outlines the purchase and test requirements for three phase, oil filled, metal enclosed pad mount transformers for both Con Edison (CECONY) and Orange & Rockland Utilities, Inc. (O&RU). 1.2 These three phase pad-mount transformers shall be installed on the 4 kv, 13 kv, or 27kV underground residential distribution (URD) systems of both CECONY and O&RU. 1.3 This specification also states the test and manufacturer's proposal requirements of both CECONY and O&RU. 2.0 GENERAL 2.1 All requirements stipulated in this document apply to both CECONY and O&RU (the Company), unless otherwise noted. 2.2 All characteristics, definitions, terminology, ratings and tests, except as otherwise stated in this specification, shall be in accordance with the latest revisions of ANSI and EEI-NEMA Standards on "Distribution Transformers." Where there is a conflict between ANSI and EEI-NEMA Standards, the more stringent standards shall apply. 2.3 All transformers shall comply with the latest efficiency requirements set by the Department of Energy (D.O.E.). 2.4 The pad-mount transformers shall be oil immersed, self-cooled, three phase, 60 Hertz, and "dead front" primary constructed with no exposed live parts in the primary compartment. 2.5 The types of pad-mounted transformers purchased shall be: Voltage (KV) Type 13 Radial/Loop Feed 4/13 (Dual Voltage) Radial/Loop Feed 27 Radial/Loop Feed 2.6 The radial feed transformers shall have provisions for a single 3 phase primary source of supply. Specification Revision Rev Effective Copyright Information 3/47

4 2.7 All transformers shall have sufficient clearance to permit the conversion of Radial Feed to Loop Feed via the insertion of feed-thru inserts (aka "Wish Bone Tees" or Binoculars ). Note: Transformers with 600 amp primary bushings are for radial feed only 2.8 This specification also covers the requirement to install feed-thru loadbreak inserts by the manufacturer on CECONY transformers only. O&RU transformers do not require the installation of feed thru inserts and are not to be supplied with the transformers. 2.9 All transformers purchased under this specification shall conform to Quality Assurance Specification 7100 level D. 3.0 ELECTRICAL REQUIREMENTS 3.1 TRANSFORMER WINDINGS AND CORE Transformer windings and core construction shall be as follows: 3.2 BIL RATINGS KV Winding Core Construction 4/13 Dual Y-Y 5-Legged (Con Ed) 13 Delta-Y 3-Legged or 5-Legged (O&RU) 13 Y-Y 3-Legged or 5-Legged 27 Y-Y 5-Legged The BIL rating of all secondaries (208/120 and 480/277) shall be 30kV. Note: Fully insulated 480V or 208V secondaries are acceptable alternates for the "GrdY" reduced insulation system specified and should be indicated in proposals and on nameplates when offered The BIL rating of primary, refer to Section TAP CHANGER See Table 3.3 below for tap identifications. a. For 4265 V primary voltage All taps on the 4265 V windings Specification Revision Rev Effective Copyright Information 4/47

5 Position Voltage Percentage 1 or A 4372 Tap position 1: 1¼% above tap pos. 2 2 or B 4318 Tap position 2: 1¼% above nominal 3 or C 4265 Tap position 3: NOMINAL 4 or D 4212 Tap position 4: 1¼% below nominal 5 or E 4158 Tap position 5: 1¼% below tap pos. 4 b. For 13200V and 13200/4160 V primary voltage All taps on 13200V windings Position Voltage Percentage 1 or A Tap position 1: 2½% above tap pos. 2 2 or B Tap position 2 : 2½% above nominal 3 or C Tap position 3: NOMINAL 4 or D Tap position 4 : 2½% below nominal 5 or E Tap position 5: 2½% below tap pos. 4 c. For V primary voltage All taps on the windings Position Voltage Percentage 1 or A Tap position 1: 2½% above tap pos. 2 2 or B Tap position 2: 2½% above nominal 3 or C Tap position 3: NOMINAL 4 or D Tap position 4 : 2½% below nominal 5 or E Tap position 5: 2½% below tap pos. 4 d. For V primary voltage All taps on the windings Position Voltage Percentage 1 or A Tap position 1: 2½% above tap pos. 2 2 or B Tap position 2: 2½% above nominal 3 or C Tap position 3: NOMINAL 4 or D Tap position 4 : 2½% below nominal 5 or E Tap position 5: 2½% below tap pos. 4 Table TRANSFORMER TAPS IDENTIFICATION 3.4 TRANSFORMER RATINGS AND LINE NUMBERS This section covers transformer ratings (i.e. voltage, primary BIL) and Line Numbers. Three phase pad mount transformers specified in this Section 3.4 shall be supplied with isolated primary taps. Refer to Table 3.3 in Section 3.3 for tap changer identifications and positions. Specification Revision Rev Effective Copyright Information 5/47

6 GrdY/ GrdY/277 - Radial Feed 4265 GrdY/ GrdY/277 60kV BIL With Taps - Radial Feed KVA Primary Bushing Size CECONY Item No. (Amps) Delta GrdY/120 - Radial Feed Specification Revision Rev Effective Copyright Information Delta GrdY/120 95kV BIL With Taps - Radial Feed KVA Primary Bushing Size CECONY Item No. (Amps) Delta GrdY/277 - Radial Feed Delta GrdY/277 95kV BIL With Taps - Radial Feed KVA Primary Bushing Size CECONY Item No. (Amps) GrdY/ GrdY/120 - Radial Feed GrdY/ GrdY/120 95kV BIL With Taps - Radial Feed KVA Primary Bushing Size O&RU Class & Stock # (Amps) /47

7 GrdY/ GrdY/277 - Radial Feed Specification Revision Rev Effective Copyright Information GrdY/ GrdY/277 95kV BIL With Taps - Radial Feed KVA Primary Bushing Size O&RU Class & Stock # (Amps) Dual Rated GrdY/7620 x 4160 GrdY/ GrdY/120 (for both dual voltage switch positions) with Taps (except as noted) - Radial Feed kva Dual GrdY/7620 x 4160 GrdY/ GrdY/120 95kV BIL - (for both dual voltage switch positions) with Taps (except as noted) - Radial Feed Primary Bushing Size (Amps) CECONY Item No O&RU Class & Stock # (No Taps) N/A Dual Rated GrdY/7620 x 4330 GrdY/ GrdY/277 - (for both dual voltage switch positions) With Taps - Radial Feed Dual GrdY/7620 x 4330 GrdY/ GrdY/277-95kV BIL - (for both dual voltage switch positions) With Taps - Radial Feed KVA Primary Bushing Size (Amps) CECONY Item No /47

8 (Radial Feed Only) Dual Rated GrdY/7620 x 4160 GrdY/ GrdY/277 - (for both dual voltage switch positions) with Taps - Radial Feed Dual GrdY/7620 x 4160 GrdY/ GrdY/277-95kV BIL (for both dual voltage switch positions) With Taps - Radial Feed KVA Primary Bushing Size O&RU Class & Stock (Amps) # GrdY/ GrdY/120 - With Taps - Radial Feed GrdY/ GrdY/ kV BIL - With Taps Radial Feed KVA Primary Bushing Size CECONY Item No. (Amps) ,400 GrdY/15, GrdY/277 - With Taps - Radial Feed 3.5 IMPEDANCE 26,400 GrdY/15, GrdY/ kV BIL -With Taps - Radial Feed KVA Primary Bushing Size CECONY Item No. (Amps) A A The impedance range for each size, including all tolerances, shall be as follows: a. 13KV and Dual Rated Transformers Impedance Range (% on Specification Revision Rev Effective Copyright Information 8/47

9 KVA Secondary Volts Rating) / to / to / to /120 & 480/ to / to / to / to / to / to / to / to 6.18 b. 27KV and Dual Rated Transformers KVA Secondary Volts Specification Revision Rev Effective Copyright Information Impedance Range (% on Rating) / to / to / to / to 6.5 NOTE: Failure to meet the specified impedances will result in automatic rejection of the applicable line item. 3.6 PRIMARY FUSE AND FUSE HOLDER Units purchased shall have a partial range current limiting fuse(s) in series with an expulsion fuse(s) The expulsion fuse(s) shall be Bay-O-Net type, full range, with drip shields located in the primary compartment. The fuse shall be contained in gasketed and tightly sealed Bay-O-Net assembly and shall be field replaceable. The fuse sizes shall be submitted to and approved by CECONY or O&RU Distribution Engineering for the first order only of each size and type The Bay-O-Net fuse assembly shall have a flapper valve to minimize oil spillage upon removal. This shall be Eaton/Cooper Power Systems Catalog Number C99FV or the Company Engineering Department approved equivalent. 9/47

10 3.6.4 All 13.2/4.16 dual voltage units shall be shipped from the manufacturer with an 8.3kV rated current limiting fuse, with ampacity for transformer operation at 4.16kV as listed in Section a. below LOADBREAK shall be stenciled above the fuses The following fuse combinations are acceptable for CECONY transformers: TABLE A: FOR CECONY ONLY For Dual Voltage Transformers (13200 GrdY/7620 x 4160 GrdY/2400) 4.16KV Voltage (kv) Size (kva) FLA Rating (Amps) Fuse Rating (Amps) Eaton/Cooper Bay-O-Net Part No. Rating (Amps) Eaton/Cooper Current Limiting Part No C10 80 CBUC08100C C CBUC08150D C CBUC08165D C CBUC08150D100* C17* 360 CBUC08180D100* *Fuses in Parallel Voltage (kv) 13.2 Size (kva) FLA Rating (Amps) TABLE B: For Straight 13.2KV Units Fuse Rating (Amps) Eaton/Cooper Bay-O-Net Part No. Rating (Amps) Eaton/Cooper Current Limiting Part No C04 30 CBUC08030C C08 65 CBUC08065C C10 80 CBUC08080C C CBUC08150D C CBUC08150D C CBUC08150D C CBUC08250C C CBUC08250C * C16* 300 CBUC08150D100* Specification Revision Rev Effective Copyright Information 10/47

11 *Fuses in Parallel The following fuse combinations are acceptable for O&RU transformers: TABLE C: For Dual Voltage Transformers (13200 GrdY/7620 x 4160 GrdY/2400) 4.16KV Voltage (kv) Size (kva) FLA Rating (Amps) Fuse Rating (Amps) Eaton/Cooper Expulsion (Bayonet) Rating (Amps) Hi-Tech Internal CLF C HTSS C HTSX C16 300* HTSS232150* C17 330* HTSS232165* C18** 360 HTSS232200* *Fuses in Parallel **Dual sensing bayonet fuse, not current sensing Voltage (kv) Size (kva) FLA Rating (Amps) TABLE D: For Straight 13.2KV Units Fuse Rating (Amps) Eaton/Cooper Expulsion (Bayonet) Rating (Amps) Hi-Tech Internal CLF C06 50 HTSS C08 85 HTSS C HTSS C HTSS C HTSS C16 200* HTSS242100* C17 300* HTSS242150* C17 300* HTSS242150* C18** 300* HTSS242150* *Fuses in Parallel **Dual sensing bayonet fuse, not current sensing 4.0 MECHANICAL REQUIREMENTS 4.1 General Construction Specification Revision Rev Effective Copyright Information 11/47

12 4.1.1 The padmount transformer consists of a cabinet and tank. The cabinet consists of one high voltage compartment, one low voltage compartment, and two separate doors. The general arrangements for cabinet and tank shall be in accordance with Drawing No All metal sections of the entire unit shall be adequately joined together The tank and the compartment shall be assembled as an integral unit, and shall be metal enclosed, weather-resistant, and tamper resistant. The unit shall be designed for anchoring on a pad without additional housing, fences, or other provisions to make the unit safe for direct contact with the public. The manufacturer shall submit proof that the designs comply with the test procedures and requirements of the design test method for cabinet security described in ANSI C , "American National Standard for Switchgear and Transformers Pad-mounted Equipment - Enclosure Integrity." The overall transformer footprint shall be as follows: a. For CECONY: Units shall be designed to fit on the concrete pad as shown in Drawing Nos and EO B without overhanging the slab or exposing cable entrance openings through the slabs. Coolers however, if required, may overhang out from the tank enclosure and slab a maximum of 30 inches. Cooling radiators may be located on the rear or side portions of the transformer tank, refer to Drawing No for details. b. For O&RU: Units shall be designed to fit on the concrete pad as shown in Appendix A, O&RU Pad-mount Transformer Installations for concrete pad dimensions The transformer material shall have the following minimum thicknesses: Cabinet inches (13 gauge) Tank Walls inches (7 gauge) Auxiliary Coolers inches (18 gauge) The entire surface of the pad-mount transformer shall be treated to minimize corrosion. The enclosure coating system shall comply with section 5 of ANSI C , "American National Standard for Switchgear and Transformers-Pad-mounted Equipment - Enclosure Security." Specification Revision Rev Effective Copyright Information 12/47

13 4.1.6 The entire cabinet and tank shall be coated with weather-resistant, chip resistant paint. The final paint finish shall be dark, green color, either Munsell Notation 5.5 GY 2.76/2.1 or 7 GY 3.29/ The unit (up to and including the 2500kVA size) shall be equipped with integral bottom support bars and be so constructed that it can be lifted using a forklift, using a crane, or skidded, and slid into place without damage to the cabinet or tank components. It shall not be necessary to have to use a crane to move and position the unit. However, provisions for crane lifting shall also be provided All transformer cabinets shall have two separate outside metal doors. One door shall provide access to the low voltage compartment and one to the high voltage compartment. Each door shall have welded on, inside non-corrosive hinges. Bolted on hinges are acceptable provided the mounting hardware is brass, bronze or stainless steel and the hinges are secured so that there are no exposed screws, bolts, or other fastening or devices that are externally removable (with the exception of the penta head bolts provided for extra security) that could provide access to energized parts in the enclosure All doors shall have non-corrosive, tamper resistant hinges The front sill shall be removable Transformer sill and risers shall be manufactured of 304 Stainless Steel. 4.2 Cabinet Construction Cabinet doors shall be of sufficient size to provide adequate working space when opened between 160 and 180. The doors shall be provided with latch stops, installed by the manufacturer, for latching the door in the open position at The low and high voltage compartment doors shall be adequately reinforced from the inside to prevent entrance into the compartments and misalignment of the doors and locking mechanisms A flange (¾-inch minimum width; 2 inch maximum width) shall be provided at the base of both the high voltage and low voltage Specification Revision Rev Effective Copyright Information 13/47

14 compartments to provide a means for anchoring the unit to the pad CECONY Purchase Orders: Doors with a maximum opening of 90 are acceptable, provided there is a 12" minimum clearance between high voltage bushing H1 and the door For all units, the high voltage compartment shall have a minimum width of 43". The depth of the high voltage and the low voltage compartments shall be a minimum of 20" for 13 kv & dual 13/4kV units and 23" for 27 kv units. Note: for O&RU units 750KVA and greater, the minimum secondary compartment depth shall be 24" (inches) The following LV compartment minimum widths are required: KVA Size Secondary Volts Specification Revision Rev Effective Copyright Information LV Compartment Minimum Width (Inches) 75 thru / Both Companies 75 thru / / thru / CECONY; 28 O&RU / CECONY; 28 O&RU /208 and 277/480V O&RU Only / CECONY; 28 O&RU / CECONY; 28 O&RU 1500 thru / CECONY; 28 O&RU The high voltage low voltage partition shall be constructed of nonconductive material or shall have an insulating barrier suitable for 7.62 kv to ground applications installed on the high voltage side of the metal. The 4.5 minimum dimension between the H 3 bushing well and the partition shall be to the surface of the insulating barrier The low voltage compartment door shall be equipped with a handle, which has a three point latching device. The latching shall be at the top, bottom and center. The center shall fasten to the metal compartment divider In addition to the above, all access doors shall be fastened with a device that requires a penta head tool to permit unlatching the 14/47

15 door only after the padlock has been removed. Hex head bolts are not acceptable. The penta head device or penta head captive bolt shall be coordinated such that the padlock may not be inserted into the hasp until the access door is fully latched and the penta head device is secured A minimum of one penta head device or captive bolt and padlocking means shall be provided. The penta head device or bolt shall be surrounded by a non-rotating guard or shall be recessed such that the penta head device or bolt can be engaged only by the proper tools. The dimensions of the penta head bolt and non-rotating recess or guard shall comply with ANSI C , Fig The penta head device or bolt shall not be readily removable during normal operation of the door(s) and, if removed or disengaged, there shall be no holes remaining that would permit entry of a wire into the enclosure. 4.3 Tank Construction A float type liquid level gauge shall visually indicate the oil level. The gauge shall be mounted such that when it indicates the oil level is low, it is unsafe to operate the bayonet fuse as a loadbreak device. It shall be installed in the high voltage compartment near the bayonet fuses. The liquid level gauge shall be Heartland Liquid Level Gauge Catalog #HLG-1000 or Con Edison or Orange & Rockland Engineering approved equivalent A standard top-oil temperature gauge shall be supplied and installed in the low voltage compartment An oil-sampling valve shall be supplied and located in the bottom right corner of the primary compartment, between 3 inches and 6 inches from the HV/LV barrier as shown in Drawing No All units shall be provided with a handhole. The handhole cover shall be bolted on for all units and shall be covered with a false tamper-resistant roof The handhole shall provide functional access to all components. A rectangular handhole 12" min. X 18" min. or a round handhole with Specification Revision Rev Effective Copyright Information 15/47

16 an 18" min. diameter is required. As an alternate, for units with a tank width of less than 62" a handhole of 9.5" min. X 17.5" min. may be provided. For units with a tank width of 62" and greater, two handholes shall be provided - each a minimum of 9.5" X 17.5". 4.4 High Voltage Terminals All high voltage terminals, located in the high voltage compartment, shall be of completely "dead front" design. High voltage terminals rated 200 amps shall be Elastimold "Flower Pot" short shank bushing wells with bail tabs and replaceable stud or equal. High voltage bushing wells are to be gasketed to the tank. The bushing well shall be rated at 35kV and 150kV BIL. It shall be capable of directly accepting inserts for the 13kV and 34kV systems. High voltage bushing wells shall be installed complete with bail tabs. Acceptable manufacturer and catalog numbers for high voltage bushing wells are Elastimold L1601-PC-S1, Eaton/Cooper Power BW150R, ABB 609C030G01 or 609C030G02, Colt , or a CECONY or O&RU engineering approved equal High voltage terminals rated 600 amps shall be solid epoxy bushing, top mounted Elastimold Catalog No. 600T1 or equal. There are no bushing wells or feed-thru inserts for 600 amp primary units. The 600 amp bushings shall be rated 15kV and shall be gasketed to the tank All high voltage bushing wells shall have four tabs, each with hole to accept primary elbow hold down bails. These tabs shall be mounted at a 45 angle from the vertical and horizontal plane The units shall be provided with three high voltage terminals, six ground clamps and three parking stands. The general arrangement of these shall be in accordance with Drawing No The High voltage bushings shall be arranged as per ANSI C Figure 5(a) for 15.2 kv connectors All high voltage terminals, except as noted, shall have a minimum continuous rating of 200 amperes (r.m.s.) and shall withstand momentary fault currents up to 10,000 amps, r.m.s. symmetrical without damage For CECONY Only: For transformers rated 1500kVA and 2500kVA with either 13.2kV or dual 13x4kV primaries, the high Specification Revision Rev Effective Copyright Information 16/47

17 voltage terminals shall have a minimum continuous rating of 600 amperes (r.m.s.) and a momentary fault withstand rating of 40,000 amps, r.m.s, symmetrical. All internal ties and connections shall be designed to carry the rated current of the transformer continuously for at least three consecutive days, without damage All high voltage terminals shall be labeled in accordance with Drawing No Stenciled letters shall be 1.75 inches high, painted yellow High voltage bushing wells shall be installed such that the clamping bolts and the hold down bail tabs shall not extend more than 3/8 above the top surface of the bushing well Stand-off brackets and brackets for feed through devices must be solidly welded to the tank. 4.5 Low Voltage Terminals Four low voltage terminals shall be located in the low voltage compartment. Three of these terminals shall be for the phase connections and one for the neutral. The terminals and/or internal leads shall be easily disconnectable from the handhole. These terminals shall be staggered and labeled in accordance with Drawing No The continuous rating and fault withstand rating of the secondary terminals shall be in accordance with ANSI and NEMA Standards All low voltage terminals and the Xo secondary neutral shall consist of tinned copper or bronze spades. The thickness of these spades shall be 3/8" for 75 thru 500 kva, and ½" for 1000 thru 2500 kva. These spades shall have standard ANSI hole drilling and standard vertical hole spacing. The number of holes required and the horizontal spacing between sets of holes as per Drawing No shall be as follows: KVA Secondary Volts Specification Revision Rev Effective Copyright Information Number of (Sets) Holes Center-to-Center Horizontal Spacing /120 (4sets) 8 holes 2-½" /120 (4 sets) 8 holes 2-½" 17/47

18 /120 (4 sets) 8 holes 2-½" /120 (4 sets) 8 holes 2-½" /277 (4 sets) 8 holes 2-½" /120 (4 sets) 8 holes 2-½" /277 (4 sets) 8 holes 2-½" /120 (7 sets) 14 holes 2-½" /277 (4sets) 6 holes 2-½" /277 (5 sets) 10 holes 2-½" /277 (7 sets) 14 holes 2-½" /277 (5 sets) 10 holes 2-½" CECONY Purchase Orders Only: When installing secondary cables on these spades, the Company uses four-pound limiter lugs as a terminating device. These lugs are mounted back-to-back on each set of holes, thereby putting an additional eight-pound load on each set of holes. The manufacturer shall provide permanent or easily removable (for maintenance) mechanical supports. Permanent supports utilizing the tank or cabinet shall include full rated insulators between phase terminals and compartment An insulated support shall be included on 750KVA and larger units. The insulated support shall be connected between the secondary bushings and the cabinet frame such that each busing is capable of supporting ten (10) 500MCM copper cables, each six (6) feet long In additional, adequate clearances shall be provided between all low voltage spades and the cabinet. Supports used for low voltage spades shall not interfere with the assembly of lugs onto the spades On all units, the Xo secondary neutral terminal shall be: a. Solidly welded to the tank, with the ground strap internally bolted to the tank, and easily accessible from the handhole; or b. Employ an insulated neutral bushing with an external ground strap bolted to the tank. The external ground strap must be capable of carrying full short circuit current and must not occupy any of the above required cable hole sets On Y-Y units, the Ho (high voltage neutral) and Xo (low voltage Neutral) shall be internally connected through a removable link (located below, and accessible through, the handhole). Specification Revision Rev Effective Copyright Information 18/47

19 4.5.9 The secondary bushings shall be made of a non-porcelain material. 4.6 Loadbreak Switch All straight and dual voltage three phase, metal enclosed, transformers shall be provided with a built-in, 3-phase load break switch rated 200 Amperes continuous, that will be used to deenergize the transformer. NOTE: It is totally unacceptable to provide three single phase switches in lieu of a single 3-phase switch The three-phase load break switches detailed in this Section 4.6 shall be Eaton/Cooper Power Catalog Number LS2R338H3N1A and have the following minimum electrical characteristics: a. 13kV Transformers (All Types except 600 Amp Primary Units) Voltage Class kV Phase-to-Ground kV Max. Phase-to-Phase kV Max. AC Withstand kV, 60HZ, 1 min. DC Withstand kV, 15 mins. Corona Extinction Voltage kV BIL kv 1.2x50 microsecond wave Phases Simultaneous Continuous Load Current amperes Magnetizing Interrupting Current --10 amperes Short-Circuit Withstand Capability-10,000 amperes RMS symmetrical 0.17 sec) 1.3 max. asymmetrical factor. b. 27kV Transformers (all types) Voltage Class kV Phase-to-Ground lkV Max. Phase-to-Phase kV Max. AC Withstand kV, 60HZ, 1 min. DC Withstand kV, 15 mins. Corona Extinction Voltage kV BIL kV 1.2x50 microsecond wave Phases Simultaneous Continuous Load Current amperes Magnetizing Interrupting Current - 10 amperes Short-Circuit Withstand Capability- 10,000 amperes RMS Specification Revision Rev Effective Copyright Information 19/47

20 symmetrical (0.17 sec) 1.3 maximum asymmetrical factor These 13 & 27 kv primary load-break switches shall be operated remotely with a hot-stick. These switches shall have load-break capability for a PF of 70% to 80% lagging and shall be capable of closing in on the maximum fault without damage. 4.7 Parking Stands Parking stands shall be provided in the high voltage compartment in accordance with the arrangement shown in Drawing No These parking stands shall accommodate all primary load-break accessories and shall be stenciled as indicated in Drawing No The letters, associated with the primary phases A, B and C shall be stenciled over each parking stand. They shall be 0.75 inches high, painted yellow. Parking stands are to be extended a sufficient distance from the front face of the transformer tank wall to allow installation and operation of cables and terminations when loop feed adapters (Feed-Thru Inserts "Wish Bone Tees" or Binoculars ) are installed on the high voltage bushings. Sufficient vertical clearance shall also be provided between the parking stands and the high voltage bushings to allow the insertion of the feed-thru inserts without abrasion. The bushing well mounting bolts shall be cut short enough so as to not interfere with the inserts. Cables and terminators "parked" shall not interfere with cables and terminators connected to the loop feed adapters. Sufficient clearance shall be provided to permit the installation of bushing mounted, elbow type surge arresters in all units. 4.8 Grounds and Tank Grounds A copper or stainless steel tank ground pad shall be brazed or welded to both the high and low voltage compartments. This pad shall consist of two 1/2"-13 NC tapped holes (3/4" deep), spaced 1-3/4" distance between centers Ground clamps shall be provided in the high voltage compartment for terminating high voltage cable neutrals. These clamps shall be capable of accepting #8 to 2/0 AWG stranded copper conductors. They shall be screwed into a tapped boss that is welded to the tank. Two clamps per bushing are required. Specification Revision Rev Effective Copyright Information 20/47

21 4.9 Oil The oil to be used in the transformers shall be hydro-refined oil containing by weight 0.15% to 0.18% DBPC (2, 6 Ditertrary Butyl Para Cresol) inhibitor. Lower levels of inhibitor are not acceptable. The type of oil to be used shall be listed in the proposal. The approved oils are listed in Con Edison Specification EO-10, The oil used in the transformer shall have no detectable concentrations of polychlorinated biphenyls (PCB's). A detectable concentration is defined as greater than 1.0 ppm In addition to the transformer s ratings and its date of manufacture etched into the manufacturer s corrosion resistant nameplate, the following statement shall be included on the nameplate: "This Transformer is PCB Free at Time of Manufacture", or Contains less than 1 ppm of PCB s at the time of manufacture. The nameplate shall be mounted inside of the low voltage compartment door. 5.0 FEEDER AND BANK TAG HOLDER 5.1 CECONY Purchase Orders: The manufacturer shall provide a feeder and bank tag holder bracket on the inside of the low voltage compartment door. This bracket shall be in accordance with Drawing No IDENTIFICATION 6.1 For All CECONY Purchase Orders: The following class letters shall be stenciled on the inside of the low voltage compartment door as indicated on Drawing No with 1.75" minimum yellow lettering: Type of Unit 13kV Radial 4x13kV Radial 27kV Radial 13kV Radial 4x13 kv Radial Bushing Size (Amps) 200A 200A 200A 600A 600A Class Letters PM-13R PM -4/13DR PM -27R PM -13R PM -4/13DR Specification Revision Rev Effective Copyright Information 21/47

22 PM (Pad-mount); D (Dual Voltage); R (Radial) The transformer serial number, class letters, primary and secondary voltages and Line Item Number shall be stenciled externally on the upper quadrant of either side of the transformer The secondary voltages shall be stenciled on the inside of the low voltage compartment door as follows: Units with a 277/480 secondary shall have CAUTION 480 VOLTS SECONDARY" label stenciled in yellow with 1.75" minimum letters. This warning label shall also be stenciled in red above the secondary terminals Units with a 120/208 secondary shall have 120/208 V stenciled in yellow only. 6.2 For all Orange and Purchase Orders: The Orange & Rockland material number shall be painted on the outside of the high voltage compartment door on the lower left corner. The lettering shall be yellow 1.0 high. The material numbers are listed in Section The transformer size, primary and secondary voltages, serial number, and impedance shall be stenciled externally on the upper quadrant of either side of the transformer. 6.3 Orange and Purchase Orders: Transformers shall be provided with bar code labels. 7.0 ACCESSORIES The labels shall be fabricated and installed as per latest issue of Orange & Rockland Utilities, Inc. Material Standard M A sample (an actual O&RU label is required) shall be submitted to Orange & Rockland Materials Management Department for approval prior to use or installation on any transformer supplied to O&RU. The following accessories shall be provided by the manufacturer on all units and shall all be located in the compartment as indicated. Specification Revision Rev Effective Copyright Information 22/47

23 7.1 Liquid level gauge, float type (High Voltage Compartment, see Section 4.3) 7.2 Standard top-oil temperature gauge (Low Voltage Compartment, see Section 4.3) 7.3 A 1" fill plug (Low Voltage Compartment, see Section 4.3) 7.4 A 1 drain valve with sampling fitting or any other type of equivalent device. The device shall be located in the high voltage compartment, between 3 to 6 inches from the HV/LV barrier as shown in Drawing No This will enable trained personnel to sample the insulating fluid at any time, while the transformer is energized and in operation. Under no circumstances shall a sampling device be provided, which requires de-energization of the transformer, for insulating fluid sampling. 7.5 Tap changers shall be located in the high voltage compartment above the HV bushings on: a. 13kV winding of all straight and dual rated 13/4kV transformers, and on the high voltage winding of all 27kV transformers. b. The tap shall have an external handle with notations (numbers or letters) for the tap position that has the same sequence that appears on the nameplate. Only numbers or only letters shall be visible. Refer to Tables 3.3 for Tap Position Identification. c. The tap changer handle shall be installed where it can be easily operated. 7.6 A dual voltage switch, when required, shall be installed above the high voltage bushings. The handle shall be installed where it can be easily operated. 7.7 IFD: Each transformer shall be equipped with a non-resettable Internal Fault Detector (IFD) which detects internal transformer faults and provides indicator of the faults. The IFD shall also incorporate pressure relief functionality. 7.8 For all CECONY Purchases only: The manufacturer shall install feed thru Loadbreak inserts on all transformers. The inserts shall be rotatable 360 to allow the operator to orient it to the best position. The following table lists the acceptable feed-thru loadbreak inserts for each primary voltage class: Specification Revision Rev Effective Copyright Information 23/47

24 Rating (kv) Manufacturer Catalog Number 15 Elastimold 1602A3R 15 Cooper Power/EATON LF Cooper Power/EATON LF Elastimold 3702A1 7.9 Fuses shall be located in the high voltage compartment above the cable bushings, and shall be plainly visible and operable with the compartment doors open. LOADBREAK shall be stenciled on the tank above the fuses 7.10 A nameplate shall be fastened to the tank wall above the secondary bushings, indicating the month and year of manufacture. This requirement is in addition to any date of manufacture that may be coded into the transformer serial number Transformers shall be capable of accepting 27kV rated plug-in type dead-front surge arresters. However, the arresters are not part of this specification and shall not be provided with the transformer The tap changer and dual voltage switch handles shall be installed where they can be easily operated and stenciled to indicate what they are (e.g. "Dual Voltage Switch"). Stenciled letters to be 0.75 inches high, painted yellow. Both switches shall clearly indicate their modes of operation Tap Changer and Dual voltage switch handles and operating mechanisms shall be constructed of suitable materials and shall maintain contact alignment in spite of repeated or infrequent operations, in order to provide increased reliability CECONY Purchase Orders Only: The manufacturer shall install the CAUTION, WARNING, NOTICE and DANGER labels in accordance with EO INVITATION TO BID All qualified and approved manufacturers shall receive an Invitation to Bid from the Purchasing Department of Con Edison. The Bid package should include the following: 8.1 Alternates or additions to this specification. 8.2 A copy of this specification along with copies of all applicable references such as specifications or drawings listed in Section In the event that Specification Revision Rev Effective Copyright Information 24/47

25 any references were omitted in the Bid package, it is the responsibility of the manufacturer to submit requests for proper documents (specifications, drawings, etc.) through the Purchasing Department and does not relieve the manufacturer of its responsibilities under the contract. 8.3 Estimated quantity of transformers to be purchased by line item number. 9.0 MANUFACTURER S PROPOSAL SUBMITTAL In response to the Invitation to Bid, the invited Bidder (qualified and approved) shall submit a complete proposal in accordance with this specification. This complete formal proposal shall include, but not be limited to, the following: 9.1 A cover letter that includes a brief statement of the company, organization chart, objective of the bid, products & services, advantage over competitors, timelines on the design and production phrases, expectation on deliverables, QA/QC procedure, and other utility companies contact information as business references, etc. 9.2 Electrical and physical characteristics of the pad mount transformers in accordance with ANSI C , General Requirements for Distribution Power and Regulating Transformers, and ANSI C , Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers. 9.3 A list of every single exception taken to the specifications, if applicable, must be provided; the exceptions must be noted on the drawings as well. If no exceptions are taken, a statement must be included in the cover letter. Exceptions approved on prior bids must be re-submitted as a new exception, requiring a new and separate approval. 9.4 An outline sketch of the transformer showing the location of bushings and accessory equipment including all labels, stencils and nameplate data). 9.5 A list of every single component with its associated manufacturer and catalog number. 9.6 Dual voltages switch information and drawings (if applicable). 9.7 Tap changer information (if applicable). 9.8 Type and properties of the insulating fluid being used. 9.9 Drawings of top-oil temperature gauge and liquid level gauge. Specification Revision Rev Effective Copyright Information 25/47

26 9.10 Nameplate drawings Drawings for load-break switch and technical information if applicable The attached, Attachment 1- Three Phase Pad-mount Transformer Guarantee Report shall be completely filled out, and considered part of the quotation Maximum guaranteed no load and load losses (part of the attached Attachment 1- Three Phase Pad-mount Transformer Guarantee Report ) must be included for each unit supplied, not the average value of units shipped. For dual voltage transformers, losses guaranteed shall be the maximum losses of the two ratings EVALUATION OF PROPOSALS 10.1 The Company s objective is to award contracts to manufacturers who can provide cost effective product designs that guarantee high quality and reliable service All Proposals shall be kept confidential CECONY and O&RU (the Company) may organize a pre-bid meeting between the invited manufacturers and the Company to emphasize what the expectations of the bid shall be CECONY and O&RU Engineering shall evaluate and rank the proposed products based on the submitted proposal to determine the most technically competent and reliable manufacturers The list of the exceptions submitted with the proposal shall be assumed to be the only exceptions taken against the specifications. The bidder holds and accepts all responsibility for not listing or overlooking Exceptions to the Specification. Exceptions approved on prior bids must be re-submitted as a new exception, requiring a new and separate approval. The Company reserves the right to cancel orders and/or to return products that do not conform to the final agreements Proposals that do not include all of the items detailed in Section 9.0 shall be considered incomplete and may not be evaluated. Specification Revision Rev Effective Copyright Information 26/47

27 10.7 If the information submitted in the proposal is not in compliance with this specification, and/or is not indicated on the list of exceptions, the proposal will be deemed invalid and may not be evaluated When evaluating transformer losses, the dollar assessment for no-load and load losses listed in the Invitation to Bid shall be used in the economic evaluation of the Manufacturer s proposals. No credit shall be provided for actual loss values, which are less than guaranteed. The manufacturer shall pay to the Company the amount by which the value of the actual losses exceeds guaranteed losses in accordance with the dollar penalties quoted in the Invitation to Bid Only 5% of the quantity of units ordered for each line item with actual losses exceeding guaranteed losses will be accepted. All other units exceeding guaranteed losses shall be rejected and returned to the manufacturer for replacement with new units that meet guaranteed losses Satisfaction with the performance of equipment, timely deliveries and response to issues during previous and/or current contract shall be used in the evaluation of the bids by the Company as prescribed in the RFQ Request to Bid issued by the Purchasing Department AWARDING OF CONTRACTS 11.1 The Purchasing Department takes the lead to open the bids, and together with the technical evaluation ranking may award single or multiple contracts depending on business requirements Once the contract has been awarded, the manufacturer must contact the Lead Engineers of both CECONY and O&RU for a joint kickoff meeting The manufacturer must obtain a written approval on the final design before building the prototype Once the prototype is built and delivered, the manufacturer must obtain a written approval on the prototype before moving forward to the production phase The manufacturer must notify in writing the Lead Engineers of CECONY and O&RU as well as the Purchasing Department, in advance of any design or material changes to the equipment. The manufacturer shall not proceed with the changes or delivery of the equipment unless a written approval has been issued by the Lead Engineers. Specification Revision Rev Effective Copyright Information 27/47

28 The Company reserves the right to cancel orders and/or terminate the contract of a manufacturer who violates any of the aforementioned requirements. The manufacturer will be held liable for any cost incurred such as, and not limited to, removal and installation of equipment, shipping, handling and storage costs, etc PURCHASE ORDERS 12.1 The manufacturer shall submit drawings to CECONY or O&RU for approval within 4 (four) weeks after a Purchase Order has been received. These drawings shall include changes requested on the previous submittal and clearly indicate by encirclement and revision notes and numbers any changes made (under this current edition of the specification) in the drawings since the last approval was obtained Drawings requirements Detailed outline drawings showing Weight of unit Overall height Maximum tank overall diameter including cooling fins/radiators (if existing) at all locations. Dimension from top of HV bushing to top mounting bolt Distance between two pole mounting bolts Bushing details (high and low voltage) Nameplate drawing Schematic or wiring diagrams showing all connections (for record only) All other drawings necessary to completely illustrate the equipment furnished These drawings shall be in accordance with all final agreements between the Purchase Order issuer (Con Edison or O&RU) and the manufacturer. Approval of these drawings shall be obtained from the Purchase Order issuer (Con Edison or O&RU), in writing, before proceeding. Approval of drawings does not relieve the manufacturer of its responsibilities under the contract. Specification Revision Rev Effective Copyright Information 28/47

29 12.4 The manufacturer shall submit drawings for approval before fabrication starts. After drawing approvals, the manufacturer shall submit drawings (with the purchase order issuer s comments incorporated) in PDF format The drawings shall contain all general arrangement and detailed dimensional drawings, schematics and wiring diagrams necessary to completely illustrate the equipment being furnished. These drawings and diagrams shall strictly be in accordance with the final arrangement of the equipment. The transmittal of these drawings for review shall be made directly to the Lead Engineers of Distribution Engineering Department of both CECONY and O&RU During the term of the order, the manufacturer must obtain written approval from the Company (Distribution Engineering Department) of any intended changes to the design, including changes in materials, which were previously approved. Any drawings affected shall be resubmitted for approval with revision numbers, notes placed in the revision column, and pencil encirclement of the changed areas. These drawings shall be submitted two (2) weeks after the verbal order, and approval must be obtained before proceeding with the changes Modification Of Design From the first unit to the last unit manufactured in the same contract, all units shall be identical, unless Con Ed/O&R directs the Manufacturer to modify the design. Modifications include any and all alterations, additions, deletions, or process changes. However, if the Manufacturer proposes a change, it shall be submitted for approval to Con Ed and O&RU, with reasons thereof, prior to proceeding. Con Ed and O&RU will evaluate the request and reserves the right to decline proposed change This requirement applies also to all processes involved in manufacturing, assembly techniques and sequences, and test (QA/QC), by the Manufacturer or the Manufacturer s subcontractors or suppliers. Since changing the process presents a potential change in product performance, proposed changes in processes over the contract period requires notification to Con Ed and O&RU for approval. One example considered a process change is a where a particular weld procedure is intended to be revised - even though no change in component or assembly design is involved. Specification Revision Rev Effective Copyright Information 29/47

30 Changes in material or labor supply sources (subcontractors, outsourcing) by the Manufacturer, or changes in locations where manufacturing takes place, are to be made known to Con Ed and O&RU. Con Ed and O&R will evaluate and determine if requalifying is called for, or other requirements INSPECTIONS AND TESTS 13.1 The manufacturer shall be responsible for sound engineering practices and the safety and quality of products to insure uniformity and compliance with all applicable specifications and industrial standards The manufacturer shall be responsible for all required inspections and electrical tests in accordance with C57 Test Code Series of ANSI and the TR-1 Series of EEI-NEMA Standards In addition, the Purchase Order issuer (Con Edison or O&RU) reserves the right to witness any of these inspections and tests to assure conformity with the requirements Access to all manufacturing and testing facilities shall be granted to the Con Edison or O&RU representative at all reasonable times. Failure of the Con Edison or O&RU representative to call attention to any defect in material or workmanship shall not relieve the manufacturer of its responsibility The purchase order issuer (Con Edison or O&RU) reserves the right to reject all transformers, if our own test findings indicate that the manufacturer doesn t meet the requirements as stated in this proposal. Removal and transportation costs shall be paid by the manufacturer CERTIFIED TEST REPORTS 14.1 As stated in Section 2.2 of this specification, all tests performed on these transformers shall be in accordance with the C57 Test Code Series of the ANSI and the TR-1 Series of EEI-NEMA Standards The manufacturer shall furnish within two weeks of each shipment the certified test reports of unit, as measured on the production line for each transformer by serial number, that shall include these: Values of no load losses in watts Values of load losses in watts Values of the exciting current in amps Specification Revision Rev Effective Copyright Information 30/47