NIT NO.05, ITEM NO.02(2021-22)WW-I

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

Supply of Air Circuit Breaker (ACB), four Pole 415 V AC. Microprocessor based trip unit Mechanical Draw out type, of rating 2000 Amperes, breaking capacity 50KA, Model SL96066 Make: L&T

Providing /fixing and making connection of bus bar of suitable size for 2000Amp. Current carrying capacity including links, bends, aluminum bus bar will be of electrolytic grade 55% 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 tensle.

MS enclosure sheet steel enclosure made out of 2mm CRCA sheet totally enclosed, powder coated free standing, floor mounted type, dust& vermin proof, outward opening, lockable doors having hidden hinges and a bolted back cover both using non-deteriorating neoprene rubber gaskets to provide IP-54 protection .The each part of the fabricated panel will be strictly subjected to seven tank treatment. The various components, assemblies and sub equipment’s of the panel will be as per standard given in relevant IS. Panel SIZE 700MM(W) x1500(H)x800MM(D) ith aluminum bus bar

Fixing of ACB in new Panel enclosure including fixing of the base frames of suitable sizes for ACBs in the chamber. Fixing all the measuring instruments, CT’s, lamps, 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. and fixing the backup fuses as per requirement.

Servicing, over hauling of complete ACB in panel, removal of old grease and re-greasing of all movable parts with recommended grease, setting of tripping mechanism ,re-wiring of under voltage coil , complete servicing of ACB with making all incoming & out going cable connection with thimbling.,

Cleaning of ACB incoming & outgoing bus bar & insulation with heat shrinkable PVC sleeve/PVC tape throughout in red, yellow & blue color to identify three phases & black for neutral The bus-bar support insulator made of non-deteriorating, vermin proof, non-hygroscopic materials such as SMC/DMC

Providing & fixing of Jaw Contact.

Testing and Commissioning of the Panel equipment as follow:-check equipment specification.-continuity and earthing.- meggering of all equipments for phase to phase, neutral of body, neutral of earth.- testing and comissioning of ct and digital ampere meter and volt meter-all functional tests.- checking of all tightening of nuts and bolts Alignment of doors etc.-fixing of all above components CT and ampere meter etc.-inter locking tests.Testing on load with engineer in charge.

SS ENTERPRISES