84209/PROVISION OF 3.15 MVA POWER TRANSFORMER AND ITS ASSOCIATED INFRASTRUCTURE AT AF STATION MOHANBARI UNDER GE(AF) MOHANBARI

Supply, installation, testing and commissioning power transformer double wound with copper winding outdoor type complete filled with oil with standard fittings, HT 33KV secondary 11KV,3 Phase with Onload tapchanger (OLTC) (in range +5% to -15% in step of 1.25%) with remote tap changer (RTCC) panel and automatic voltage regulator (AVR),all as per IS:2026 of capacity 3150 KVA, step down outdoor type floor mounting ,double copper wound core type 3phase 50Hz AC oil immersed with IS :335 ISI mark filtered & dehydrated transformer oil with ONAN type cooling with external cooling tubes/radiators having no laod voltage ratio 33/11KV (corresponding to princial tapping) delta connection on primery side (HV connection) Star connection on secondary side (Secondary outgoing) in accordance with vector group symbol (DYN-11) confirming to IS :2026 and having off load tap changer in stpe of 2.5% on HV sied to take care of volatage from (-5%) to (+15%) to give output on 11KV secondary side including initial oil filling to approprite level ,control cable and following standard fittings complete all asspecified and directed including following :- (a) Oil conservator with oil filling hole cap and drain plug (b) 01 No prismatic oil level gauge mounted on conservator wall with first fill of charge up to maximum level (c) Silica gel dehydration breather with oil seal and first fill of charge (d) Pressure release valve with automatic resetting arrangement after relaese of pressure-01 set (e) Adequate number of thermometer pocket including one thermometer (f) Top oil filter valve(g) Botom oil filter cum drain valve (h) Rating diagram and terminal marking plate (i) Earthing terminal 04 Nos (j) Lifting lug - 02 set (k) Jacking pads 01 Set

(l) under carriaige with 04 Nos plain roller (m) Air release plug on main transformer tank (n) Adequate No of cooling radiators (o) 100mm dial type oil temperature indicator with maximumread pointer and reseting device (p) Air insulated cable box on HV and LV side (q) Buchholz Relay (having Contacts for Alam & Trip) (r) OTI (Having Contacts for Alam & Trip) (s) WTI (having Contacts for Alam & Trip) (t) Marshalling Box (Having TTB Only) (Location :- HPR Sub Stn) Note:-Plinth of Transformer as per OEM recommendation and rate should be included in the quoted rate. Note : Routine test shall be carried out as per IS 1180. Note :- (i) Pre-dispatch inspection at OEM factory premises shall be carried out by Representative of Accepting officer as per IS-2026. (ii) The manufacturer/ contractor shall furnish the diameter of LV and HV copper winding and its total resistance. The stray losses shall be specified in percentage term. The percentage of NO load and full load losses shall be as per IS 2026 (iii) The contractor shall get the approval of GE for the make of the trasformer that plan to procure. (iv) Prior to manufacture the contractor shall get the general arrangement , drawing and design details of the transformer approved from GE (v) After installation of Transformer at site, the pre-commissioning test shall be carried out by SEI / EI. MAKE:- SCHNEIDER ELECTRIC / ABB / CG

Supply and installation of 33 KV, singlephase, out door oil cooled CT of ratio 400/5- 5 Amp, class 1.0 / 5P10, burden 15 VA comolete all as specified and as directed.

Supply and installation of 33 KV single phase out door oil cooled PT of ratio 33 KV/rt3/110 V/rt3/110V/rt3,Class 0.5-3, Burden 50 VA – 50 VA comolete all as specified and as directed.

Supply laying and testing of overhead 120 sqmm size covered AAC cable with all fixing accessories complete all as specified and as directed.

Supply and laying & testing of 185 sqmm, 3 core XLPE insulated screened PVC bedded, galvanized steel strip armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11000 volts grade. (from VCB to Transformer) complete all as specified and as directed.

Supply and fix cable jointing kit for 11 KV grade cable for outdoor terminal cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Al conductor cable of size 185 sq mm. complete all as specified and as directed.

Supply and fix cable jointing kit for 11 KV grade cable for indoor terminal cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 185 sq mm complete all as specified and as directed.

Supply and fix HT 33 KV out door gang operated air-break switch 9 insulator rocking type,horizontal mounting of 400 Amps rating worked from ground level with earth swich and locking arrangement complete all as specified and as directed.

Supply and fix outdoor expulsion type drop out fuse with double stack of insulators mounted on channel base for 33 KV Line complete all as specified and directed.