Breaker Testing & ServicingBreaker Testing & Servicing / By admin We shall carry out overhauling, servicing, maintenance and testing of HT breakers (MOCB, ABCB, VCB, SF6) & LT breakers (ACB, OCB) of various make. We are equipped with special tools requires for the same. We carry following test on HT / LT breaker. Contact Resistance Measurement test. Circuit breaker timing test. Insulation Resistance test. (Velocity & Interruptions) Primary Injection Test for Short Delay, Long Delay, Instantaneous. Polarization test while commissioning. Resistance of closing & tripping coil.