Directorate Of Construction Services And Estate Management Tender

TRANSFORMER

Design, manufacture, testing at manufacturer's works, supply, assembling, installation, precommissioning testing at site and commissioning of 2.0 MVA, 33/0.433 kV, ONAN, 50 Hz, Dyn 11, core type, double wound outdoor type transformer with transformer oil, copper winding, shall conform to Energy efficiency level - 2; degree of protection IP-55 complete with H.V bushing suitable to receive HT IPS Al pipe/ACSR Panther and LT box suitable for LT Al sandwich type bus duct, neutral CT 3200/1A, Class PS with Vk, Imag, Rct suitable value for REF protection, Winding temperature indicator, Oil temperature indicator, MOG , Bucholz relay, Oil surge relay (OSR), ON Load tap changer with RTCC Panel with AVR (+10% to -10% in steps of 1.25%), standard mounting accessories, fittings, etc., first filling of oil, painting at works & touch up painting at site etc including 10% extra transformer oil in non returnable drums. Transformer shall be suitably mounted on rail including supplying & grouting of rail and locking the bidirectional flanged wheels of the transformer. Notes: (1) G.A drawings to be got approved by Department. (2) Tenderer shall hire transformer OEM commissioning team or their authorised representatives for installation, testing & commissioning of Transformers. (3) Use of crane and other tools & plants for assembly of transformer is included in the scope of item. (4) Routine tests, heat run tests on transformer shall be performed in presence of departmental engineers as per technical specifications & relevant IS/BS/IE, at works during inspection before despatch. Type test certficate as indicated in the specification shall be submitted before commencement of routine test of transformers for scrutiny & approval. (5) Maximum total losses, percentage impedance, no load current and temperature rise of the transformers or in other words the transformer shall conform to Energy efficiency level 2 as per latest revision of IS 1180. Bidders shall note the rejection clause no. 3.26 of technical specification of transformer. (6) Transformer shall meet all the technical requirement of specifications. (7) Filteration of transformer oil & OLTC at site, topping of oil after filteration including complete oil testing from NABL accredited lab , all as per relevant IS specifications & as per instructions of E.I.C are included in the scope of tender. (8) WTI/OTI setting for alarm & Trip shall be marked on marshalling Box by permanent Marker. (9) Neutral of Transformer shall be identified by Black insulated sleeve on SMC/DMC insulator. (10) Core shall not be suspended from top inspection cover. (11) Size of cable & source from which supply is given to the equipment shall be written on terminal box of the Transformer.(12) The control cabling to be measured separately under item no. 14. (13) RTCC panel included in the scope of above item of Transformer.

RTCC Panel: RTCC panel shall be made from 14SWG CRCA sheet. Internal wiring shall be done with 2.5 sq. mm. PVC insulated copper conductor wires. The RTCC panel includes the following: a. Supply on indicating lamp. b. Tap change in progress indication lamp. . c. Digital type tap position indicator. . d. Space heater and heater switch. . e. Raise & lower push button . f. Control supply switch. . g. Auto manual switch . h. Automatic voltage regulating relay and PT. . i. Protection fuses