Product Details

Specifications

1.Voltage: 12KV
2.Max.Current: 3150A
3.For breaking or closing load and over-load current
4.Fuse can be allocated

ZN28-12 Series Indoor AC Medium-voltage Vacuum Circuit Breaker

General

1. ZN28-12 structure and characteristic

A. This circuit breaker is killed the arc room to make up by organization, framework and running part, insulating part and vacuum. Vacuum kill arc room and sound support form conductive return circuit, is it two stamp out reason pole link a whole it to have, fixed on framework by the insulator , through lead pole, turn arm, big axle and insulating to deliver a child pole, etc. transmission part and divide into floodgate spring and organization connect and finish dividing into, shutting movements.

B. Have an electromagnetism or spring operating organizations this circuit breaker of oneselves, the structure is compact, movement reliable, debug simple, appearance beautiful, it is give up ability better, longe-lived, maintain the simple, small, pollution-free, noise low grade advantage to turn on to have.

2. ZN28-12 is a regular type special-purpose vacuum circuit breaker of switch cupboard, do not bring to the operating organization except being one's own, its structure, the function and characteristic parameter are essentially identical with ZN28-12, must mix with the operating organization meeting the mechanical characteristic request of the switch while using, for instance CD17 , CT8 , CT19 ,etc..

Type Meaning

Service Conditions

1.The ambient temperature: -30ºC ~ +40ºC

2.The altitude: ≤ 1000m (if the altitude needs increasing, the rated insulating level is corresponding added).

3.The wind pressure: ≤ 700pa (wind speed 34m/s).

4.Amplitude: earthquake degree 8.

5.Enviroment degree: degree 3.

6.Install the place: There should not be fire, explode dangerously, chemistry is corroded and shakes violently.

Technical Parameter

Number	Item		Unit	Reference
1	Rated voltage		KV	12
2	Rated frequency		HZ	50
3	Rated insulation level	1minPower frequency withstand voltage	KV	42
		Thunder impulse withstand voltage(peak value)		75
4	Rated current		A	630;1250;1600	1250;1600;2000	2000;2500;3150
5	Rated short-circuit close current(peak value)		KA	20	31.5	40
6	Rated operation order			off--0.3s on and off--180S-on and off
7	Rated short-circuit Breaking current times		times	30(50)	30(50)	20(30)
9	Rated Impulse withstand voltage		KA	50	80	100
10	4S Heat steady e.c.A			20	31.5	40
11	all opened and broke time		ms	≤100
12	Mechanical life-span		times	10000