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Help CenterZN28-12 Series Indoor AC Medium-voltage Vacuum Circuit Breaker
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Specifications
1.Voltage: 12KV2.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 |
|||
Dimension and mounting
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