SPL REPAIR/REPLACEMENT AGAINST BER TRANSFORMER AT AGE B/R DETT-A UNDER GE 862 EWS

Supply, install ,testing and commissioning of distribution transformer stepdown , 11 KV/0.433 KV three phase complying with level-II, BIS certified with BEE 4 star rating (corresponding level as per BIS ammended up to date at the reciept of tender) outdoor type double copper wound suitable for 50 HZ system of capacity 63 KVA ,oil immersed naturally cooled delta connected on HT side and star connected on LT side ,vector group Dyn II, provided with off load tap changer to vary secondary voltage from -7.5% to +7.5 % in step of 2.5 % losses should be confirmed to the limits specified as follows maximum allowable losses at full load (100%) & half load (50%) shall not be exceed 1000W & 300W respectively ,percentage impedence 5 % losses and impedance are subjected to tolerance as specified in IS 1180. The transformer should be supplied with first filling of oil confirming to IS 335. The transformer should have both side cable end box with neutral brought out complete all as directed by Engr-in-charge and installation of transformer shall be carried out as per IS 10028 and comprising with the following standard fittings/technical specification. (a) lifting lug for transformers and tank (b) Earthing terminal rating and diagram plate. (c) Air release device (d) Oil filling inlet pipe with plug (e) Drain outlet pipe with brass gate valve. (f) Conservator tank with oil level indicator

(g) Silica gel breather (h) First fill of oil upto level including conservator tank with fresh new oil confirming to IS 335. (j) Type of connection delta/star (k) Type of cooling : Oil and natural air. (l) Vector group : Dyn -II (m) Temperature rise over an ambient of 50 degree C (n) Cable end box on both side for HT/LT cables of suitable size. (o) provision of thermometer with pocket. (p) Provision of oil and winding temperature gauge. Note:- Tests after installation shall also be carried out by SEI for which GE will intimate through proper channel.

Supply, install ,testing and commissioning of distribution transformer stepdown 11 KV/0.433 KV three phase complying with level-II, BIS certified with BEE 4 star rating (corresponding level as per BIS ammended up to date at the reciept of tender) outdoor type double copper wound suitable for 50 HZ system of capacity 100 KVA ,oil immersed naturally cooled delta connected on HT side and star connected on LT side ,vector group Dyn II, provided with off load tap changer to vary secondary voltage from -7.5% to +7.5 % in step of 2.5 % losses should be confirmed to the limits specified as follows maximum allowable losses at full load (100%) & half load (50%) shall not exceed 1500W & 435W respectively ,percentage impedence 5 % losses and impedance are subjected to tolerance as specified in IS 1180. The transformer should be supplied with first filling of oil confirming to IS 335. The transformer should have both side cable end box with neutral brought out complete all as directed by Engr-in-charge and installation of transformer shall be carried out as per IS 10028 and comprising with the following standard fittings/technical specification. (a) lifting lug for transformers and tank (b) Earthing terminal rating and diagram plate. (c) Air release device (d) Oil filling inlet pipe with plug (e) Drain outlet pipe with brass gate valve. (f) Conservator tank with oil level indicator

(g) Silica gel breather (h) First fill of oil upto level including conservator tank with fresh new oil confirming to IS 335. (j) Type of connection delta/star (k) Type of cooling : Oil and natural air (l) Vector group : Dyn -II (m) Temperature rise over an ambient of 50 degree C (n) Cable end box on both side for HT/LT cables of suitable size. (o) provision of thermometer with pocket. (p) Provision of oil and winding temperature gauge. Note for item no 1 & 2 :- 1. The quoted rate shall be include the taking down,loading unloading and transportation from site to store yard for old existing transfromers . 2. At the time of Installation of New transformer, any extra requirement like fixing of new MS channels or maintenance of existing platforms for mounting of transformers as per site condition should be the responsibility of the contractor and the rate shall be included in the quoted rate. 3. Tests after installation shall also be carried out by SEI for which GE will intimate through proper channel.