Good Quality Power Transformer - vacuum interrupter – Anhuang

Product Detail

The vacuum interrupter uses the wave ceramic as insulating shell, the contact material is CuCr alloy, the longitudinal magnetic field cup structure, with high breaking capacity, high insulation level, strong arc extinguishing ability, long life, small size and easy maintenance, No explosion risk, no pollution, low noise and so on.

Main technical parameter	Value
Rated voltage	12kV
Rated current	630A
Rated frequency	50Hz
Rated short-time power frequency withstand voltage (1 min)	42kV
Rated lightning impulse withstand voltage	75kV
Rated short-time withstand current	20KA
Rated duration of short-circuit	4 s
Rated peak withstand current	50KA
Rated short-circuit making current （peak）	50kA
Rated active load breaking current	630A
Rated closed-loop breaking current	630A
Rated cable-charing breaking current	10A
Rated breaking current of single capacitor bank	400A
Circuit resistance at lowest rated contact force	≤45μΩ
Closing force due to bellow and atmosphere	70±40N
Force required to hold contacts open at full storke	120±40N
Contacts limit erosion	3mm
Mechanical endurance	10000 times
Weight of movable parts	≤0.6kg
Storage life	20 years

Mechanical Requirements Of Vacuum Circuit Breaker

MECHANICAL DATA RQUIRED FOR THE MATCHEDVACUUM SWITCHGEAR	Value
Clearance between opening contacts	8±1mm
Average opening speed	1.0±0.2 m/s
Average closing speed	0.6±0.2 m/s
Rated contacts pressure	900±500N
Contacts bouncing duration at closing operation	≤2ms
Synchronism of three phases	≤2ms
Contacts re-bouncing clearance at opening operation	≤3mm