CB TIMING TEST

PROCEDURE:- EGIL is intended primarily for testing high-voltage circuit breakersat medium-level voltages. There must not, however, be more than one break per phase since the time channels are not galvanicallyisolated. Contact times are recorded for main contacts, preinsertionresistor contacts and auxiliary contacts. Coil currents arealso recorded. 1. Ground EGIL using the included ground cable. Make certain that the circuit breaker is closed and grounded on both sides. 2. Connect the main contact cable set to EGIL and the circuit breaker. 3. Connect the auxiliary contact cable set to the a- and b-contacts on the operating mechanism. 4. Connect the EGIL sequencer to the close- and tripcoils and to the auxiliary voltage. 5. Remove the breaker’s ground connection on one side. 6. You are now ready to proceed with the test. Simply turn the MEASURE rotary switch and read the results.