National Institute Of Science Education And Research Tender

LT Panel: Supply, installation, testing & commissioning of floor mounting front operated, front access, extensible type cubicle panel, totally enclosed, dust and vermin proof with IP-42 protection with hinged and lockable doors. Switchboards fabricated from 2 mm thick CRCA sheets including inter- connections, tinned copper crimping lugs, bonding to earth and painting suitable for use at 415 V, 3 phase 4 wire 50 Hz system, and to withstand a fault level of 50KA symmetrical for 1 sec at 415 V complete as per specifications mentioned in point sl no 13 of technical specification. The LT panel consists of Incoming and outgoing feeder mentioned below.

a . 1 no of 1000A microprocessor based MCCB as incomer with spreader and extended rotary handle. Details of MCCB:- 50Ka breaking capacities Ics = 100% Icu, Adjustable Over Load from 0.4 - 1.0 x In, Adjustable Short Circuit from 1.5 - 8 x Ir with selectable time delay Inbuilt ground fault protection from 10% - 50% of In, Adjustable neutral overload protection available : 50% to 150% of Ir, Advanced Current, Voltage, Frequency & Power based protections, Other Protections like Maximum Demand, Phase Sequence, THD etc, Variable trip class at 1.5 Ir,6 Ir & 7.2 Ir, Front LED indication of Over Load, short circuit & earth fault b . 6 Nos of 400A microprocessor based MCCB as outgoing. with a spreader and extended rotary handle. Details of MCCB:- 50Ka breaking capacities Ics = 100% Icu, Adjustable Over Load from 0.4 - 1.0 x In, Adjustable Short Circuit from 1.5 - 8 x Ir with selectable time delay ,l Inbuilt ground fault protection from 10% - 50% of In, Adjustable neutral overload protection available : 50% to 150% of Ir, Advanced Current, Voltage, Frequency & Power based protections, Other Protections like Maximum Demand, Phase Sequence, THD etc, Variable trip class at 1.5 Ir,6 Ir & 7.2 Ir ,Front LED indication of Over Load, short circuit & earth fault

Retrofitting of the existing panel a. With 400A microprocessor based MCCB with spreader and extended rotary handle Details of MCCB:- 50Ka breaking capacities Ics = 100% Icu, Adjustable Over Load from 0.4 - 1.0 x In, Adjustable Short Circuit from 1.5 - 8 x Ir with selectable time delay, l Inbuilt ground fault protection from 10% - 50% of In, Adjustable neutral overload protection available : 50% to 150% of Ir, Advanced Current, Voltage, Frequency & Power based protections, Other Protections like Maximum Demand, Phase Sequence, THD etc, Variable trip class at 1.5 Ir,6 Ir & 7.2 Ir, Front LED indication of Over Load, short circuit & earth fault b. 100 X 6 mm tinned copper bus bar from main bus bar at top ,to the existing feeder to be retrofitted with spreader for all 3 phases and neutral.(Approx running length of bus bar is 16 meters ) c. Necessary indication lamp ,bus bar sprout ,bus bar insulators and any other accessories required for retrofitting work is also in the scope.