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DYZN28A-12 Vacuum Circuit Breaker

DYZN28A-12 Vacuum Circuit Breaker

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APPICATION
As indoor AC high voltage switchgear of rated voltage of 12KV and three-phase 50Hz, the DYZN28A-12 series indoor AC HV vacuum circuit breaker services in the fixed type switchgear or removable switchgear for replacing the oil minimum circuit-breaker inside backward switchgear. The circuit-breaker can function as protection and control device for electric equipment in mineral & industrial enterprise, power plant and substation and the occasions featuring frequent operation.
In compliance with the standards GB 1984, JB3855, DL/T403
 
TECHNICAL SPECIFICATIONS
 
Rated voltage
12KV
Rated current
630A, 1000A, 1250A
Rated insulation level
1min power frequency withstand voltage
42KV
Rated switch lightning impulse withstand voltage
75KV
Rated short-circuit breaking current
20KA, 25KA, 31.5KA
Rated short-time withstand current
50KA, 63KA, 80KA
Rated peak withstand current
20KA, 25KA, 31.5KA
Rated duration of short-circuit
4s
Mechanical endurance
10000 times
 
 
 
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