ZW20-12F series outdoor high-voltage vacuum circuit breakers are outdoor high-voltage switchgears 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. This product is matched with the controller to meet the requirements of the distribution automation system and to perform the traditional recloser function reliably and efficiently.

It adopts a mature box-type sealing structure and is filled with SF6 gas inside. It has good sealing performance and is not affected by the external environment. It is a maintenance-free product. The spring operating mechanism adopts a direct-drive chain main drive and a multi-stage tripping system, which has high operational reliability and is a good substitute for the circuit breaker on the column.

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	34/1
		Interphase,to earth(dry)		42/1
		Break(dry)		48/1
		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(E2)
11	SF6 gas rated gage pressure		MPa	0
12	Rated operating voltage and rated voltage of auxiliary circuit		V	AC/DC220、DC48、DC24
13	Main circuit resistance		μΩ	≤120
14	Mechanical life		Times	10000(M2)
Note:if altitude over than 1000m, the rated insulation level should be modify as appropriate