1. General
ZW7-40.5 AC outdoor high voltage vacuum circuit breaker is a high voltage electric equipment which use vacuum as its arc extinguish device and three pole,50Hz.The circuit breaker is used in 35kV high voltage distribution system for opening and closing rated current and fault current, especially to be used in the places need them to be operated frequently .The circuit breaker is in accordance with IEC56,GB/T 1984-1989.
2. Main technical parameter
No. |
Item |
Unit |
Parameter |
1 |
Rated voltage |
KV |
40.5 |
2 |
Rated frequency |
Hz |
50 |
3 |
Rated current |
A |
1250、 1600、 2000 |
4 |
Rated insulation level |
KV |
95 |
185 |
5 |
Rated short circuit breaking current |
KA |
20 |
25 |
31.5 |
6 |
Rated short circuit breaking time |
|
20 |
7 |
Rated short circuit O/C current(peak) |
KA |
50 |
63 |
80 |
8 |
Rated withstand current in peak value |
KA |
50 |
63 |
80 |
9 |
Rated short time withstand current/short
circuit continuance time(4s) |
20 |
25 |
31.5 |
10 |
Rated capacity breaking current |
Times |
400 |
11 |
Rated operation sequence |
A |
O-0.3s-co-180s-co |
12 |
Total breaking time |
S |
0.1 |
13 |
Closing time |
Ms |
T≤120 |
14 |
Opening time |
Ms |
T≤60 |
15 |
Mechanical life |
Times |
10000 |
16 |
Activity connector allowed fret thickness |
Mm |
3 |
17 |
Weight |
kg |
1100 |
3. Breaker assembled CT□ type spring operation device
4. Character
The breaker has improved based on ZW7-40.5 circuit breaker. It has small size, light weight, good exterior, and the design of it is very new, and adopts a soft packaging technology. It is installed in insulation support shell, which made by outdoor epoxy resin and current transformer combine porcelain support. In addition, the power storage of spring operation device is an airproof device, so it can be used to improve the reliability of operation device.
5.Picture