NIT 08 (2022-23) Item No. 08

Dismantling the old existing IDMT Relays and other relays from the HT Panels chambers after disconnecting the wiring connections after proper shut down conditions and discharging of the CTs as required as per the availability of the shutdown of the Breakers/ Panel

Supply of Digital / Numeric Protection Relay, IDMT Type, 3 Phase over current and Earth Fault Relay with high set with CT Rating 1A or 5A. Make: L&T / C&S DJB Approved.

Covering the complete Door by Providing and fixing of CRCA Sheet duly painted of size as per required for covering the entire chamber door and with provisions for mounting of the new Relays with consumables etc. as required in alignment for mounting at HT Panel chambers. Installation of the new Protection Relays at new sheet as required with proper mounting accessories as per requirement.

Renovation of the tripping system of the HT Breakers by providing and fixing of the suitable Tripping coils for replacing the defected coils in the HT Breakers for enabling the tripping of the breakers.

Making the required wiring connections of the Relays between the main CTs and Relays as well as Breakers tripping system and the Relays by existing or by providing, laying and connecting of new copper cables including providing all consumables and accessories as required.

Testing and commissioning of the new installed Relays for their required operation and tripping. Configuration and setting of the fault levels of the Relays and checking for their fault tripping commands / indications at each Breaker for over current and earth fault or combined faults positions, enabling the system to be ready for facing sudden fault situations.

Dismantling of the old defective metering instruments and providing & fixing of the new digital type Ampere meters along with making their connections by wiring with the existing wires or by supply of new copper wire including work as required at site including making required setting with CT Ratio for HT Supply etc. in proper shut down conditions as required.

Dismantling of the old defected indicating instruments, control fuses / MCBs and providing / fixing of the new indicators, Fuses / MCBs along with making their connections by wiring with the existing wires or by supply of new copper wire including work as required at site including providing and fixing of new control arrangement with complete wiring connections as required in proper shut down conditions.

Complete Testing of all the metering and indicating system including checking of wiring, making required configuration, setting up of CT Ratio etc. and all the work required for proper functioning of instruments as per requirement.

Premier Engineering Company

GOGIA BROTHERS