DC 220V 12KV Vacuum Universal Circuit Breaker Transformer Substation Protection
| Outdoor 12KV High Voltage Vacuum Circuit Breaker with high quality |
ZW8-12 Outdoor high-voltage vacuum circuit breaker is outdoor distribution equipment with 12kV rated voltage and 50HZ three phase alternating current
It is applied to lead current, over current and short circuit current during the breaking-closing electric system
It is suit for protecting and controlling in the transformer substation, industrial and mining establishments' distribution system or other rural power grids.
| Features of high voltage vacuum circuit breaker |
a. The breaker has strong breaking capacity, with short arcing time and long electrical encurance. It could break the short-circuit current for 30 times without maintenance. The mechanical features are good with reliable insulation and simple structure.
b. Circuit breaker consists of conductive circuit, insulation system, seals, and enclosure. General structure is three phases in one enclosure.
c. Creepage distance of silastic bushing is 26.9mm/KV.
d. Vacuum arc-control chamber is the arc-control component of the breaker, which enclosed with external insulation porcelain housing, and middle sealing-in.
| Specification |
|
Rated voltage(kV) |
12 |
|
|
Rated Insulation Level 1 min power frequency withstand voltage (kV) |
dry test |
42 |
|
west test |
34 |
|
|
Rated short-circuit closing current(peak) kA |
31.5 40 50 |
|
|
Rated short-circuit breaking current (kA) |
12.5 16 20 |
|
| Rated operation of short-circuit breaking current interruption | 30 | |
|
Rated current(A) |
630 1000 1250 |
|
|
Rated Operation Sequence |
O-0.3S-C0-180S-CS |
|
|
Rated peak withstand current (kA) |
31.5 40 50 |
|
|
Rated short circuit lasting time(S) |
4 |
|
|
Lightning impulse withstand voltage (kV) |
75 |
|
|
Mechanical life (times) |
10000 |
|
|
Overcurrent release rated current (A) |
5 |
|
|
Rated Operation Voltage |
AC/DC220 |
|
|
Weight |
160Kg |
|
| High Voltage Vacuum Circuit Breaker Image Details |
