Soda flouride circuit breaker

Sulphur hexaflouride circuit breaker

Sodium flouride circuit breaker

Sodium bicarbonate circuit breaker

Oil

Water

Nitrogen

Air

Low density

Low cost

Easy to fabrication

Low resistance

Brass

Copper

Silver

Tungsten

Sub-station constructed outside the building

Sub-station constructed inside the building

Pole mounted sub-station

The substation laid under ground