project | unit | Numerical value |
Rated voltage | KV | 12 |
Rated current | A | 630/1250 |
Power frequency withstand voltage | kV | 42/48 |
Lightning impulse voltage (peak) | kV | 75/85 |
Rated short-circuit breaking current | KA | 20/25 31.5 |
Rated short-circuit making current (peak) | KA | 50/63 80 |
Rated short-time withstand current | KA | 20/25 31.5 |
Rated peak withstand current | KA | 50/63 80 |
Rated short circuit current breaking times | time | 30 |
Mechanism life | time | 10000 |
Description
Zw10-12, zw12-12, zw27-12 outdoor isolation voltage vacuum circuit breakers are three-phase AC outdoor high-voltage switchgear, mainly used in rural power grids, urban power grids, mines, railways, ports and other power distribution systems 12kV class, 630A rated current , 50Hz rated frequency. They are respectively suitable for outdoor overhead lines, switching load current, overload current and short-circuit current, switching and protecting the grid. The circuit breaker can be equipped with an isolating switch (which forms an obvious fracture) to become a combination switch. The isolating switch is installed on the side of the circuit breaker body and connected to the circuit breaker through the angle steel base frame. The drive shaft is equipped with an interlocking device that matches the circuit breaker mechanism to prevent misoperation.
The circuit breaker is equipped with reclosing control or section controller to form a reclosing (or sectioning) intelligent circuit breaker (cooperating with section controller 1, with three functions of closing inrush current control, over-current protection and short-circuit quick-break) section compound protection , 1-3 times reclosing, low current grounding protection, wired remote control, wireless remote control under the pole and other functions.
Use environmental conditions
a. Ambient temperature: + 40 ° C ~ 40 ° C;
b. Sea level: ≤ 2000m, and negotiate with the manufacturer for more than 2000m;
c. Wind pressure: ≤ 700pa (equivalent to wind speed 35 / M / s);
d. Relative humidity: daily average value ≤% 95, monthly average value ≤ 90 ‰
f. Pollution level = lll
e. The surrounding air shall not be obviously polluted by corrosive gas and combustible gas;
g. No frequent violent vibration.
Shape and installation dimensions
Product model and meaning