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Certification:GB1984, IEC
Silicon Rubber / Solid Epoxy Resin Bushing ZW20 Outdoor Vacuum Circuit Breaker
echnical Parameter
|
No |
Item |
Unit |
Data |
|
|
1 |
Rated voltage |
kv |
12 |
|
|
2 |
Rated frequency |
Hz |
50 |
|
|
3 |
Rated current |
A |
630 |
|
|
4 |
Rated peak value withstand current |
kA |
50 |
|
|
5 |
Rated time withstand current/4s |
kA |
20 |
|
|
6 |
Rated short circuit breaking current |
kA |
20 |
|
|
7 |
Rated short circuit current making cycles(peak value) |
times |
50 |
|
|
8 |
Rated operate sequence |
O-0.3s-CO-180s-O |
||
|
9 |
Lightning impulse withstand voltage |
kv |
75/85 |
|
|
10 |
Secondary circuit 1min frequency withstand voltage |
V |
95/80 |
|
|
11 |
Mechanical life |
times |
10000 |
|
|
12 |
1min power frequency withstand voltage |
(wet)Phase-to-phase phase-to-earth |
kv |
34/35 |
|
(dry) Phase-to-phase phase-to-earth |
kv |
42/49 |
||
|
13 |
SF6 gas pressure |
Mpa |
0 |
Summary
ZW20 series circuit breaker is a new product which is inventively produced by Ningbo Nature Shingsung Automation Co., Ltd. As a kind of maintenance-free outdoor vacuum switch, it has the features of three-phase non-segregated longitudinal magnetic field vacuum quenching of arc, SF6 as the insulation and the insulation of silicone rubber/solid epoxy resin.
ZW20 series circuit breaker use three-phase non-segregated structure and has the features of stable and reliable breaking performance, no combustion and explosion danger, maintenance-free, light weight (two-thirds of similar products ), high cycle life (mechanical operating life is 10000 times) and so on. New designed spring operating mechanism is exposed in SF6 to effectively avoid traditional spring operation mechanism’s design defects, such as stagnation and rustiness, making a significant improvement in reliability.
Scope of Application
ZW20 series circuit breaker is mainly used to break and close load current, overload current and short-circuit current in the electric power system. It is used to protect and control the power distribution system in transformer substation, industrial and mining enterprises, and it is especially suitable for the transformation of the power network in rural and city. This circuit breaker can be used with FTU/dividing switch controller, so as to automatically detect, isolate and alarm the faults in main line’s section and branch, and monitor line operation. And it has the function of automatically recovering power
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