Outdoor ZW20 12kv 50Hz 630 A High Cycle Life Vacuum Air Circuit Breakers operation
Air Circuit Breakers Technical 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 |
|
Air Circuit Breakers Summary
ZW20 series circuit breaker is a new product which is inventively produced by
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.
Air Circuit Breakers 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 supply in the fault segment. After adding measure and protection,
control and communication functional module to the switch, it can satisfy the requirement of power distributing automation.
Air Circuit Breakers The Main Features Of This Product
1. Vacuum arc technology
The vacuum tube that ZW20 series circuit breaker uses is made by the technology of
three-phase non-segregated longitudinal magnetic field vacuum quenching of arc,
which is one of the most advanced open circuit device.
Long-term field operation experience proves that the vacuum tube which uses this technology has the features of long life
and high reliability.
With this technology the spiral groove structure on the active and static contactor makes the current that goes
through the contact produces longitudinal rotating magnetic field, which can accelerate the diffusion of ionizing particle
and reduce arc energy. And then the shielding case of special alloys will rapidly absorb energy of diffused arc.
This process makes the vacuum tube own the advantages of small heat value, short arc time, long life etc.
2. Silicon rubber/solid epoxy resin bushing
ZW20&
