Outdoor HV SF6 circuit breaker with live tank for using on indoor/outdoor substation. It is mainly used to open and close rated current, fault current or conversion line to realize the protection, control and operation of power system, and can also carry out three-phase fast automatic reclosing operation.
The outdoor HV SF6 circuit breaker has advanced design, solid structure, small volume and light weight. Besides, according to the IEC standards, the product has been proved to have excellent breaking capacity, reliable insulation, strong current capacity, long service life and other characteristics through all type tests. The three poles are separated on a beam, which is fixed on two supports installed on the ground. Spring operating mechanism is installed in the lower part of the middle of the beam, through the connecting rod, arm and other transmission parts for three-pole linkage opening and closing operation. Each pole is composed of an arc extinguishing chamber, a supporting insulator and a crank box.
Specifications of the outdoor HV SF6 circuit breaker:
Rated voltage: 12kV - 17.5kV - 24kV - 30kV - 33kV - 36kV - 40.5kV
Rated normal current: 630A - 1250A - 1600A - 2000A - 2500A - 3150A
Rated power frequency: 50Hz - 60Hz
Rated 1 min power frequency withstand voltage: 50kV - 70kV - 85kV - 95kV -120kV
Rated lighting impulse withstand voltage: 125kV - 150kV - 170kV - 185kV - 200kV - 220kV
Rated short circuit breaking current: 25kA - 31.5kA - 40kA
Rated operating sequence: O-0.3s-CO-15s-CO
Mechanism: Spring actuator
Mechanical life: 10000 times
Operating voltage: DC110V
Levels of protection: IP54
Rated gas pressure(20℃): 0.5Mpa