General:
ZW32-12 type outdoor pole-mounted HV vacuum CB (hereinafter referred to as CB) is rated voltage12kV, 50Hz three-phase AC outdoor power distribution equipment used for power distribution network to break and close load current,over-load current and short-circuit current in electric
systems. It is used in substation and industrial & mining enterprise power distribution system for protection and control,better fits countryside power grid and frequent operation places, especially for the retrofit of urban power network and countryside power network.
Characteristic:
The CB applies three-phase pole-type structure. It has characteristics of stable closing/breaking property, no fire or explosion danger, maintenance-free, small dimension, small weight, long service life, etc.
The CB is hermetical sealed, and is moisture-resistant, anti-condensation. It is especially suitable for application at severe cold and damp areas.
Three-phase pillar and current transformer apply imported outdoor epoxy resin solid insulation materials. It is high/low temperature resistant, UV-resistant and anti-ageing.
The operating mechanism is miniature spring operating mechanism with low breaking/closing energy consumption.
The driving of it applies straight transmission with little components and high reliability. The operating mechanism is enclosed in a cabinet, and that makes it rust-resistant and more reliable.
The CBS are electrically and remote controlled, also can be manually controlled. They can be fitted with controllers to realize electric automation or to form auto-reclosing device with reclosing controller.
They are also fitted with disconnectors of clear isolation opening and have reliable mal-operation prevention mechanical interlocking device between CBS. And the disconnectors are easily detachable.
CBS can be fitted with two-phase or three-phase current transformers for automatic over-current release and supplying circuit information for intelligent controller.
Weight of CB<100kg
Overall dimension: H× W× D 740x960x880 (with isolation) 720x900x240 (without isolation)
Technical parameters:
| SI. NO. |
Item |
Unit |
Data |
Remark |
| 1 |
Rated voltage |
kV |
12 |
|
| 2 |
Rated frequency |
Hz |
50 |
| 3 |
Rated current |
A |
630 |
| 4 |
Rated short-circuit breaking current |
kA |
20 |
| 5 |
Rated peak withstand current (peak) |
kA |
50 |
| 6 |
Rated short-time withstand current/duration |
kA/s |
20/4 |
| 7 |
Rated short-circuit closing current (peak) |
kA |
50 |
| 8 |
Rated operation sequence |
Break-0.3S-close, break-180S- close, break |
| 9 |
Mechanical life |
Times |
10000 |
|
| 2000 |
Disconnector |
| 10 |
Rated current breaking times |
Times |
10000 |
|
| 11 |
Rated short-circuit current breaking times |
Times |
30 |
| 12 |
Main circuit 1min power frequency withstand voltage
(inter-phase, to earth, opening) |
kV |
42/48 |
Wet 34 |
| 13 |
Lightning impulse withstand voltage
(inter-phase, to earth, opening) |
kV |
75/85 |
|
| 14 |
Secondary circuit 1min power frequency withstand voltage |
kV |
2 |
Mainly Technical Parameters
| No. |
Item |
Unit |
Parameters |
| 0 |
Type |
|
ZW43R-24 |
| 1 |
Rated voltage |
kV |
24 |
| 2 |
Rated frequency |
Hz |
50/60 |
| 3 |
Rated current |
A |
630/1250 |
| 4 |
Rated short-circuit breaking current |
kA |
20/25 |
| 5 |
Rated peak value withstand current(peak) |
kA |
50/63 |
| 6 |
Rated short time withstand current |
kA |
20/25 |
| 7 |
Rated short-circuit closing current (peak) |
kA |
50/63 |
| 8 |
Mechanical life |
Times |
10000 |
| 9 |
Rated short-circuit breaking current breaking number |
Times |
30 |
| 10 |
Power frequency withstand voltages (1 min), wet/dry: inter-phase, earth, fracture |
kV |
65/79 |
| 11 |
Lightning impulse withstand voltage (peak) inter-phase ,earth, fracture |
kV |
125/145 |
| 12 |
Rated operate sequence |
|
O-0.3-CO-180S-CO |
| 13 |
Secondary circuit 1min power frequency voltages |
kV |
2 |
Adopting a vacuum arc extinguishing chamber, air insulation, and an electric spring operating mechanism, vacuum circuit breaker has strong arc extinguishing ability, high short-circuit breaking frequency, no fire or explosion hazard, easy operation, and is a high-performance and practical product. The overall structure of this product adopts a three-phase common box, with conduit inlet and outlet lines. The box is filled with dry air, and the electric spring operating mechanism is arranged on the side of the box, which can be reliably used under harsh environmental conditions. This product's vacuum arc extinguishing chamber adopts a ceramic shell, cup-shaped longitudinal magnetic field contact structure, copper chromium contact material, and has excellent short-circuit current breaking and closing capabilities.
What kind of product is small, lightweight, and aesthetically pleasing. The vacuum arc extinguishing chamber and insulation support sleeve are designed compactly, and the outgoing conductive rod is externally injected with silicone rubber.
Application :
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