Medium-voltage indoor vacuum circuit breaker
12 - 24 kV, max. 40 kA | ZN28 Chint Electric Co.,Ltd.

ZN28-12kV Indoor Vacuum Circuit Breaker

Application: in 12-24 kV power distribution system for control and protection. Rated current up to 3150A, breaking capacity up to 40kA.
Ratings: 24kV/3150A, 40kA
Standards: IEC 60056

Features:
 High insulation level and peak withstand current capacity.
 Impact and vibration reduced.
 Reliable operation.
 Less maintenance

Technical Data:
 Rated voltage (kV): 12
 Rated current (A): 630 to 3150
 Rated short-time breaking current (kA): 20 to 40
 Rated short-time making current (peak value) [kA]: 50 to 100
 Rated withstands current (peak) [kA]: 50 to 100
 Rated short-time withstands current (RMS) [kA]: 20 to 40
 Rated short-circuit continuous time (s): 4
 Rated making & breaking times (Times): 20 to 50
 Rated operation sequence (kV): O-0.3s-CO-180s-CO
 1min power frequency withstand voltage (kV): 42
 Rated lighting impulse withstand voltage: 75
 Mechanical life (Times): 10000
 Rated operating voltage (V): -110/~110, -220/~220
 Inter-poles center distance (mm): 210±2.5 (≤1600A) to 275±2.5 (3150A)