What are the different types of SF6 circuit breakers?

They come in 1 Pole SF6 Circuit Breaker type and 3 Pole SF6 Circuit Breaker. For Special Purpose like Railways, we also offer Double Pole type RDSO Approved 132 KV SF6 Gas Circuit Breakers. They are Gang Operated type, and Individual Pole Operation Type. Few Model Names are 3AP1 FG, LTB 170, GL312S etc.

When was the first SF 6 circuit breaker made?

The first high-voltage SF 6 circuit breaker with a high short-circuit current capability was produced by Westinghouse in 1959. This circuit breaker in a grounded tank (called a dead tank), could interrupt 41.8 kA under 138 kV (10,000 MV·A) and 37.6 kA under 230 kV (15,000 MV·A).

How many kV can a SF 6 circuit breaker interrupt?

The first high-voltage SF 6 circuit breaker built in 1956 by Westinghouse, could interrupt 5 kA under 115 kV, but it had six interrupting chambers in series per pole.

Why are SF 6 circuit breakers so popular?

The achievement around 1983 of the first single-break 245 kV and the corresponding 420 kV to 550 kV and 800 kV, with respectively 2, 3, and 4 chambers per pole, led to the dominance of SF 6 circuit breakers in the complete range of high voltages. Several characteristics of SF 6 circuit breakers can explain their success: