Technical Parameter

Rated current: 630 / 1250 1600 / 2000 2500 / 3150 a

Rated short-circuit breaking current: 20 / 25 31.5 40 Ka

Rated short-circuit closed current: 50 / 63 80 100 Ka

Rated peak withstand current: 50 / 63 80 100 Ka

4S rated short-circuit withstand current: 20 / 25 31.5 40 Ka

Rated insulation level power frequency withstand voltage (rated, before and after  breaking): 42 (fracture 48)

Rated insulation horizontal impulse withstand voltage (rated before and after breaking): 75 (fracture 85)

Rated operation sequence: opening-0.3s-closing & opening-180s-closing & opening

Mechanical life: 20000 times

Rated short circuit breaking current breaking times: 50V

Rated closing voltage of operating mechanism (DC): AC / DC, 110200

Rated opening voltage of operating mechanism (DC): AC / DC, 110200

Contact distance: 11 ± 1 mm

Length (compression length of contact spring): 3.5 ± 0.5 ms

Asynchrony of opening and closing of the three-phase : ≤ 2 ms

Contact closing bounce time: ≤ 2 m / S

Average opening speed: 0.9 ~ 0.12 m / S

Average closing time: 0.4 ~ 0.8 s

Opening time under the highest operating high voltage: ≤ 0.05 s

Opening time under the minimum operating voltage: ≤ 0.08 s

Closing time: 0.1s

Main circuit resistance of each phase: 50

Allowable wear cumulative thickness of moving lens: 3 mm

Application

Indoor high-voltage vacuum circuit breaker is the indoor switchgear of three-phase AC 50Hz power system with rated voltage of 12kV, which is used as the protection and control unit of power grid equipment and power equipment of industrial and mining enterprises. It is suitable for frequent operation under rated working current, or places with multiple short-circuit breaking current. The circuit breaker is the integration of operating mechanism and circuit breaker body, which can be used as a fixed installation unit or equipped with a special propulsion mechanism to form a handcart unit.