NIT No-17 EE (SDW) II/ (20-21) Item No. 3

Retrofitting of main Air circuit breakers of 415 Volt LT Panel at Batla House SPS by carrying out following works: Air Circuit Breaker (ACB), 3Pole 415 V AC. Manual Draw out type, of rating1000 Amperes ,50KA, Thermal Magnetic DN-1 Make: L&T/Siemens/C&S/BCH/ DJB approved make

Amp. Meter digital Make: L&T L&T/Siemens/C&S/BCH/ DJB approved make

Volt. Meter digital Make: L&T L&T/Siemens/C&S/BCH/ DJB approved make

S/O Protection relays for incomer having sensitive earth fault ,over current ,S/C protection with following features-High set elements, highly immune to harmonics, both 1A & 5A CT input in one relay,6out put contacts, Non-volatile memory for trip indication, self monitoring facility, status indication LED display & sealable front cover to prevent unauthorized access Make: L&T/ Make: L&T L&T/Siemens/C&S/BCH/ DJB approved make

Indicating Lamp. Make: L&T L&T/Siemens/C&S/BCH/ DJB approved make

Breaker control switch Make: L&T L&T/Siemens/C&S/BCH/ DJB approved make

UV release Make: L&T Make: L&T L&T/Siemens/C&S/BCH/ DJB approved make

Dismantling of old ACB & other accessories from existing Panel ,removing of all cable connection after taking shut down with help of gas cutter, heavy labor etc.

Providing /fixing and making connection of bus bar size 100x10mm for incomer including links, bends, aluminum bus bar will be of electrolytic grade conductivity or as per relevant IS having sufficient cross section area insulated with heat shrinkable PVC sleeve in phase color identification. The bus bar support insulator shall be of class F insulation made out of non-hygroscopic material as SMC/DMC. All hard ware for connection/joints shall be in high tension.

Providing /fixing and making connection of bus bar size 100x10mm for bus coupler including links, bends, aluminum bus bar will be of electrolytic grade conductivity or as per relevant IS having sufficient cross section area insulated with heat shrinkable PVC sleeve in phase color identification. The bus bar support insulator shall be of class F insulation made out of non-hygroscopic material as SMC/DMC. All hard ware for connection/joints shall be in high tension.

Arrangement of incoming / outgoing cable termination by providing & fixing of terminal link of current carrying capacity 1000Amp. With phase separator in acrylic sheet .Removable cable gland plate to be provided for each cable entry with cable gland. Making connection of both incoming & out going side as required with proper insulation.

Fixing of the ACB in the existing L T Panel Board including providing & fabrication & fixing of the base frames of suitable sizes for ACBs in the chamber.

Fixing all the measuring instruments , lamps, over current & earth fault relay etc. at the metering chamber along with complete wiring through 2.5 sq mm single core copper wire including providing and fixing of necessary ferrules etc.

Loading, Unloading, Cartage and Transportation charges for the above Panel up to the site including charges of heavy labour etc.

Testing & commissioning of the Panel and installed equipments, as per required parameters with relevant IS .testing of the panel prior to switching on as follow i)Continuity and earth testing ii) Meggaring of all equipments for phase to phase, neutral to body, neutral to earth and phase to earth. iii)checking for all tightness of nut and bolts iv) Alignments of doors etc. v) Interlocking tests. vi) All function tests

M G Traders and Engineers