supply , installation and commissioning of ht and lt pannels at thdcil complex rishikesh , supply , installation , testing and commissioning of lt panel board ( to be connected and integrate with existing panel ) as per the following specificaton . the panel should be designed as per the latest standard iec 61439 . the panel should have busbar clearance of 25 mm for ph to ph and 19 mm for ph to neutral , zero stray voltage doors and panels , polyster glass support for insulation . the cable alleys should be 300 mm wide and it should be fitted with hinged door that open up to and angle of 95 deg . the provision of cable entry should be from bottom . the ip protection of panel should be ip-42 for external and ip2x for internal with 3b as form of sepration . the panel should be equiped with suitable size of ct and display meter for vaf measurement . make of panel: l&t ( ti ) , siemens ( sivcon ) , schneider ( prisma ) a . incomer acb 1nos . 1 . 1250 a , four pole , 50 ka , mdo type air circuit breaker with microprocessor release having lsing protection . the breaker should have common height and depth across the range and must have arc chute interlocking for saftey of operators . the accessories should be front mounted and have tool-less fixing of voltmetric release . the display of complete accessory information about acb should be at the front facia . the acb should have icu=100% of ics , impulse voltage 12 kv , icm=105ka , opening time of 40ms . make l&t , siemens , schneiderb . outgoingthe outgoing feeder should consist of microprocessor based mccb with inbuilt earthfault protection and front led indication of overload , shortcircuit and earthfault . make l&t , siemens , schneider . 1 . mccb 4p , 36 ka , 630 a , microprocessor release . 2 nos . 2 . mccb 4p , 36 ka , 250 , microprocessor release . 6 nos . , supply , installation , testing and commissioning of ht panel ( to be connected and integrate with existing panel ) of vcb panel consisting of 2 nos of outgoing vcb of rating 800a , 12 kv , fault level 26 . 3 ka as per iec 62271-100 , iec 62271-102 , 62271-200 . the panel should be draw out type and readily to extend on both side and should comply following specs . it should be equipped with suitable size/ratio ct and protection should be provided by mc61anx relay . 1 . nominal current : 800 a2 . short time current rating : 26 . 3 ka3 . duration of short circuit withstand : 3 sec . 4 . making capacity : 65 . 75 ka5 . impulse withstand voltage : 75kvp6 . one minute power frequency withstand : 28kv7 . suitable for operation sequence : o-0 . 3 sec-co-3 min-co8 . break time : < 3 cycles9 . mechanical life : > 10 , 000 operations10 . degree of protection : ip4x