Product Details

ZN12 (ZN72) -40.5 Indoor Vacuum Circuit Breaker 35KV three-phase AC 50HZ applied to power system, the circuit breaker for the ceramic structure, using the longitudinal magnetic field contacts, is small, the proliferation of breaking arc generated when current distribution in the contact on the same local melting phenomenon does not occur, but also has a low arc energy voltage (20-200V) and low chopping current (4-5A), and operate with high reliability organizations.

The circuit breaker with spring energy storage sector, can exchange energy storage, or DC operation, can also be used manually. The circuit breaker uses a special contact material, so interrupter high breaking capacity, and has a long electrical life.

The switch of simple structure, open high capacity, long life operation of fully functional no explosion risk, maintenance is simple, suitable for power plants, substation control and distribution system, protection switching, particularly suitable for heavy duty and frequent breaking operation place.

Mainly technical parameters

No	Item		Unit	Technical parameters
1	Rated voltage		KV	40.5
2	Rated current		A	1250		1600	2000
3	Rated short-circuit breaking current		KA	20	31.5	25	31.5
4	Dynamic current (peak)		KA	50	80	63	80
5	4S thermal current		KA	20	31.5	25	31.5
6	Rated short circuit making current (peak)		KA	50	80	63	80
7	Rated short-circuit current breaking times		Time	20
8	Rated operating sequence			0-03s-Co-180s-Co
9	Rated insulation level	1min power frequency withstand voltage	KV	95
		Lightning impulse withstand voltage (peak)		185
10	Mechanical life		Time	10000
11	Rated single capacitor device ON-OFF current		A	630
12	Rated single back-to-back capacitor device current		A	400
13	Rated voltage electrical energy storage		V	AC,DC 110 220
14	Energy Storage Power Rating		W	275
15	Electrical Energy Storage Energy Storage time		S	≤15
16	Hop Tripping coil rated voltage		V	AC,DC 110 220
17	Hop Tripping coil rated current		A	1.91(AC) ,0.89(DC)
18	Over-current tripping device rated current		A	5
19	Contactor opening distance		MM	25±2
20	Contactor Contact trip		MM	6±2
21	At the different period of three consistency		MS	≤2
22	Contact closing bounce time		MS	≤3