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Indoor High Voltage Vacuum Circuit Breaker

ZN28G side mounted indoor vacuum circuit breaker
  • ZN28G side mounted indoor vacuum circuit breaker

ZN28G side mounted indoor vacuum circuit breaker

ZN28G ZN28A-12 series indoor vacuum circuit breaker is a three-phase AC 50Hz,rated voltage of 12kV indoor witchgear ,
control and protection for industrial and mining enterprise,
power plants and substations,electrical acilities,
and for frequent operation place.

Detailed introduction

ZN28G side mounted indoor vacuum circuit breaker

ZN28G Indoor High Voltage Vacuum Circuit Breaker

Summary
ZN28G ZN28A-12 series indoor vacuum circuit breaker is a three-phase AC 50Hz,rated voltage of 12kV indoor witchgear ,control and protection for industrial and mining enterprise,power plants and substations,electrical acilities,and for frequent operation place.

Model Implication

Specifications

No. Item  Units Parameters
1 Rated voltage kV 12
2 Rated cu rrent A 630-3150
3 Rated short-circuit brea k1 ng current KA 20 31.5 40
4 Rated sho rt-circuit closing current KA 50 80 100
5 Rated dynamic steady electric current(peak) KA 50 80 100
6 Rated therrnal stability cu rre nt (RMS) KA 20 31.5 40
7 Rated thermal stability time S 4
8 The breaking times of rated short circuit break i ng current Times 30(50)
9 Open time of CD10 electromagn etic operating mechanism mS <80
10 Rated operating sequence   0-0.3s-CO-180s-CO
11 A minute power frequen cy withstand voltage(RMS) kV The phase 42, section 148
12 Lightning shock pressure kV The phase 75, section  85
13 Mechanical life Times 10000
14 Note: 20KA, 31.5KA t=0.3s t1=180s 40KA t=180s  t1 =180s

Overall Dimensions

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