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ZW7-40.5 series outdoor high voltage vacuum circuit breaker
ZW7-40.5 series outdoor high voltage vacuum circuit breaker is three phase AC 50Hz, rated voltage is 40.5kV outdoor high-voltage electrical equipment , attached the spring operator or electromagnetic actuator can be well controlled electric opening and closing can also be Manual storage, manually open and close. Design performance meet GB1984-89<<AC high voltage circuit breakers>>; national standards, and meet the IEC-56<<high-voltage AC circuit breakers>>; International Electro-technical Commission standards. ZW7-40.5 Type vacuum circuit breaker is mainly used for outdoor 35kV power transmission system control and protection also applies to urban and rural power distribution networks and industrial and mining enterprises in the normal operation and short circuit protection purposes. The overall structure of the insulator pillar product type; built vacuum interrupter type on the vase, porcelain vase for the next pillar vase. For frequent operation place. And has good sealing, anti-aging, high pressure, no burning, no explosion, long life, convenient installation and maintenance features.
Mainly Technical parameters
|
Item |
Unit |
data |
||
|
Rated voltage |
kV |
40.5 |
||
|
Rated insulation level |
1min power frequency withstand voltage |
dry |
kV |
95 |
wet |
80 |
||||
Lightning impulse withstand voltage (peak) |
185 |
||||
|
Rated current |
A |
1250,1600,2000 |
||
|
Rated short-circuit breaking current |
kA |
20,25,31.5 |
||
|
Rated operating sequence |
|
O-0.3s-CO-180s-CO |
||
|
Rated short-circuit breaking current breaking times |
times |
20 |
||
|
Rated short- circuit closed current (peak) |
kA |
50,63,80 |
||
|
Rated peak withstand current |
kA |
50,63,80 |
||
|
Rated short-time withstand current |
kA |
20,25,31.5 |
||
|
Rated short-circuit duration |
s |
4 |
||
|
Average opening speed |
ms |
1.5±0.3 |
||
|
Average closing speed |
ms |
0.6±0.3 |
||
|
Contact closing bounce duration |
ms |
≤5 |
||
|
Three phase closing and opening synchronism |
ms |
≤2 |
||
|
Opening time |
ms |
≤90 |
||
|
Closing time |
ms |
≤60 |
||
|
Mechanism life |
times |
10000 |
||
|
Rated operating voltage and auxiliary loop rated voltage |
V |
DC 110/220 |
||
AC 110/220 | |||||
|
Phase loop DC resistance (without current transformer) |
µΩ |
≤100 |
||
|
Permitted accumulate wear-thickness of dynamic and static contact |
mm |
3 |
||
|
Weight |
kg |
800 |
||
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