FUNDAMENTAL-STUDIES ON VACUUM CIRCUIT-BREAKER ARC QUENCHING LIMITS WITH A SYNTHETIC TEST CIRCUIT

The aim of this work is to demonstrate the use of a synthetic test cir cuit with LC resonant circuits for fundamental experimental work on CB (vacuum circuit breakers) Studies have been performed on a 36 kV-mode l CB at test currents of 5 and 10 kA rms aiming at separating the infl uence of different parameters of the transient recovery voltage such a s average rate of rise and peak value on the breaking capability. Furt hermore the effect of the arcing time on the measured are quenching li mit is presented.