Zhejiang Zhiming Electric Import & Export Co., Ltd.

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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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