NITNo3ItemNo7

Dismantling of old existing ACB and MCCB’s, Contactors etc. from LT panel after disconnecting the incomer and outgoing of the panel including its cradle after disconnecting the joints and mounting connections after discharging the ACB in proper shut down condition of the L.T. panel with all tools , men power & safety etc.

Supply of Air circuit breakers (ACB), triple pole, 415V, AC, 50Hz, Breaking capacity 50KA, current capacity1000 Amps, EDO type, with Auxiliary switch, over current and short circuit protection Make: Schneider, L&T, BCH and DJB approved make.

Dismantling the existing bus bars connections of ACBs, amendment of bus bar lengths in aluminium construction of suitable shape & size with required alterations/bending/ shaping as required for retrofitting of ACB and fixing the bus bar joints Including complete sleeving with heat shrink PVC tapes including all colour indications (R/Y/B/N). Fixing the new 1000 Amp ACB with cradle in the chamber including supply & fixing of MS Angle base support / frame of suitable size for mounting the ACB with complete accessories as required with necessary tools, men power etc. The job includes providing of nuts, bolts, insulators, other consumables as per site requirement.

Supply of 3 pole, 415V, AC, 50Hz, of 400 Amps MCCB. Make: Schneider, L&T, BCH and DJB approved make.

MCCB Spreaders suitable for 400/600 Amps. Make: Schneider, L&T, BCH and DJB approved make.

Supply of earth fault relay. Make: Schneider, L&T, BCH and DJB approved make.

Supply of Under Voltage Release for MCCB’s for Tripping on Electricity Failure. Make: Schneider, L&T, BCH and DJB approved make.

Work of rectification of faulty wiring, matching of Control Wiring related to the Circuit Breaker along with Digital metering Volt and ampere meters, LED Indicators etc. All the re-wiring will be done by proving & fixing 1.5sq mm copper wire duly numbered and feruled.

Supply of LED Ammeter digital type.

Supply of LED Voltmeter digital type.

Supply and fixing R.Y.B. indicating lights as per required at site.

Installation of MCCB, earth fault relays, under voltage release, voltmeter, ammeter and the work also includes providing and fixing of all other required accessories as per site requirement.

Supply of 2 way 1000 Amp 3 phase sequence changer over switch.

Installation of manual phase sequence changer over switch, complete arrangement fixed in a panel and work includes the opening of LV connection from panel/transformer and connection from main source panel or transformer and demonstration of functionality of the panel. Work includes arrangement of wires and lugs required to complete the work along with all machine, tools etc.

Work of vacuum cleaning of the complete panel after removal of ACB from the panel, the work includes the cleaning of bus bar and replacement of old screws etc.

Dismantling the old damaged door of various ACB,MCCB chambers, fabrication & fixing of the new door in CRCA Sheet with suitable cut out for proper operation of the new ACB complete duly painted through powder coating and with all required accessories like locks, hinges etc. as per site requirement.

Testing & Commissioning of ACB’s, MCCB’ & phase sequence change over etc required along with re-painting (Powder Coating) of the complete panel with proper naming. The test to be carried out are as follows: • Testing ACB and MCCB’s protection system with secondary test kit. • Meager testing of both incoming cable. • Trip test of ACB and MCCB’s off load. • Earth fault test. • General functioning test with meter calibration.

Premier Engineering Company