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Location: >> Products >> Electrical products >> ProductsZN12-12, ZN28-12 indoor HV AC vacuum circuit breaker
General
ZN12-12 indoor HV AC vacuum circuit breaker is with spring operating mechanism. The main circuit breaker applies the gas insulation structure. Circuit breaker is central handcart type and fixed type which are separately fixed on withdrawout or fixed type Switchgear.
Technical parameters
|
Item |
Unit |
|
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|
Rated voltage |
KV |
12 |
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|
Rated frequency |
HZ |
50/60 |
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|
Rated insulation |
1min power frequency withstand voltage |
KV |
42 |
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|
Lightning impulse withstand voltage |
KV |
75 |
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|
Rated current |
A |
630、1250、1600、2000、2500、3150、4000、5000 |
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|
Rated short circuit drop-out current |
KA |
20 |
25 |
31.5 |
40 |
50 |
63 |
|
|
Rated short circuit making current |
KA |
50 |
63 |
80 |
100 |
130 |
160 |
|
|
Rated short time withstand current (4S) |
KA |
20 |
25 |
31.5 |
40 |
50 |
63 |
|
|
Rated withstand current (peak) |
KA |
50 |
63 |
80 |
100 |
130 |
160 |
|
|
Rated heterogeneous phase grounding fault drop-out current |
KA |
17.4 |
21.8 |
27.4 |
34.8 |
43.5 |
54.8 |
|
|
Rated single capacitor bank drop-out current |
A |
630 |
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|
Rated back to back capacitor bank drop-out current |
A |
400 |
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|
Rated short circuit drop-out current and numbers |
Numbers |
20~40KA;50;40KA;30;50、63KA;20 |
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Mechanical endurance |
numbers |
20000 |
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|
Rated operation sequence |
|
20~40KA;O-0.3S-CO-180S-CO 50~63KA;O-180S-CO-180S-CO |
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