Overview
Zw8-12 (G) type outdoor high voltage vacuum circuit breaker, three-phase AC 50Hz outdoor high voltage switchgear. It is composed of operating circuit, conductive circuit, insulation system, sealing parts and shell. The overall structure is three-phase total box type. Used in 10kV rural power network and urban power system, as load current, overload current, short circuit current and other similar places.
Executive standard: GB1984-2003 "high voltage AC circuit breaker"; GB/T11022-1999 "High voltage switchgear and control equipment standard common technical requirements"; 1IEC62271-100 HIGH voltage AC circuit Breaker
Types of meaning
Normal service conditions
1. Ambient temperature: -40°C ~+40°C
2. Altitude :≤3000m (if the altitude is higher, the rated insulation level will be increased accordingly);
3. The ambient air can be polluted by dust, smoke, corrosive gases, steam or salt spray, and the pollution level is IV;
4. The wind speed shall not exceed 34m/s (equivalent to 700Pa on the cylinder surface);
5. Vibration or ground motion from outside the switchgear and control equipment can be ignored;
6. Special conditions of use.
If the application is required under normal use conditions other than those specified above, please consult with us.
Main technical parameters
The serial number |
The name of the |
unit |
data |
1 |
The rated voltage |
KV |
12 |
2 |
Rated current |
A |
630 1250 |
3 |
Power frequency dry withstand voltage (1 min) |
|
42 |
4 |
Lightning shock withstand voltage (peak) |
KV |
75 |
5 |
Rated short-circuit breaking current |
KV |
16 20 25 |
6 |
Rated short circuit switching current |
|
40 50 63 |
7 |
Rated peak tolerance current |
KA |
40 50 63 |
8 |
4S short-time withstand current |
KA |
16 20 25 |
9 |
Rated order of operation |
|
Points -0.3s- points -180s- points |
10 |
Rated short-circuit current times of breaking |
times |
30 |
11 |
Mechanical life |
times |
10000 |
12 |
Rated voltage of energy storage motor |
V |
13 |
Rated operating voltage with special spring operating mechanism |
V |
DC/AC220 |
|
|
V |
DC/AC220 |
14 |
Rated current of overcurrent tripper |
A |
5 |
15 |
Allowable wear thickness of static contact |
mm |
3 |
16 |
From contact |
mm |
11±1 |
17 |
(Overstroke (contact spring compression length) |
mm |
|
18 |
Tripole and brake are not synchronous |
ms |
≤2 |
19 |
Contact closing spring time |
ms |
≤2 |
20 |
Average opening speed |
m/s |
1±0.2 |
21 |
Average closing speed |
m/s |
0.7±0.15 |
22 |
Break-brake time |
s |
0.015-0.05 |
|
|
s |
0.03-0.06 |
23 |
Closing time |
s |
0.025-0.05 |
24 |
Main circuit resistance |
μΩ |
≤12(G≤200) |
Overall dimensions