ZW43-12F outdoor high voltage vacuum circuit breaker is an outdoor high voltage switchgear with rated voltage of 12kV and three-phase AC 50Hz. It is mainly used to break and close the load current, overload current and short circuit current of the power system. Applicable to substation, industrial and mining enterprises and urban and rural distribution network for protection and control, especially suitable for places with frequent operation and urban network automation distribution network.

The smart circuit breaker meets the requirements of GB 1984-2014 《High Voltage AC Circuit Breaker》, DL/T 402-2016 《High Voltage AC Circuit Breaker》, DL/T 403-2000 《12kV~40.5kV High Voltage Vacuum Circuit Breaker Ordering Technical Conditions》 and DL/ T 721-2013 《distance terminal of distribution automation system》 and other technical standards.

No.	Item		Unint	Data
1	Rated frequency		Hz	50
2	Rated voltage		kV	12
3	Rated current		A	630/1250
4	Rated short-time power frequency withstand voltage	Interphase,to earth(wet)	kV/min	42/1
		Interphase,to earth(dry)		48/1
		Break(dry)		34/1
		Secondary circuit to earth		2/1
5	Rated lightning impulse withstand voltage	Interphase,to earth	kV	75
		Break		85
6	Rated short-circuit breaking current		kA	20/25
7	Rated short-circuit making current(peak)			50/63
8	Rated short-time withstand current and duration		kA/s	(20/25)/4
9	Rated peak withstand current		kA	50/63
10	Rated short-circuit breaking current breaking times		Times	30
11	Rated operating voltage and rated voltage of auxiliary circuit		V	AC/DC220、DC48、DC24
12	Main circuit resistance	Without isolation	μΩ	≤80
		with isolation		≤160
		With two sides isolation		≤120
13	Mechanical life		Times	10000
Note:if altitude over than 1000m, the rated insulation level should be modify as appropriate