Self-extinguishing graph of a SF6 circuit breaker: The Power System measurements were carried-out at 33kv primary bus, across a 150mva, 33kv/1120v, Electrical Arc Furnace Transformer, supplying to a 180 Ton EAF Furnace, connecting through a set of 2nos. 2000A, 33kv, in parallel, SF6 Circuit Breakers.

The captured waveform graph is the drooping characteristics of a 3phase system voltage and load currents, while switching off the 2nos, 2000A, 33kv, in parallel SF6 circuit breakers, of the EAF transformer.