All types of AIR CIRCUIT BREAKER - Overhauling, servicing, Testing with Primary injection test, & Release test All types of RELAY - Testing, servicing & certification at site,VCB, TRANSFORMER - Testing, servicing and oil filtration. Check condition of arcing contact and gap between fixed and moving arcing contacts shall be checked. Checking the reset mechanism, tripping of breaker through push button, Tripping of ACB manually through volt metric release. Checking tripping of ACB through protection release, Checking and adjust freeness of DN and volt metric release trip rod, Checking presence and proper tightening of hardware. Checking condition and alignment of jaw contact with cradle terminals, Checking and adjusting gap between hylam sheet and side plate, Checking ACB tripping through shunt release.