Mid mounted ZW32 outdoor high-voltage vacuum circuit breaker manufacturer direct sales

Arc extinguishing principle:

ZW32-40.5 outdoor high-voltage vacuum circuit breaker adopts a vacuum arc extinguishing chamber, using vacuum as the arc extinguishing and insulation medium, with extremely high vacuum degree. When the moving and stationary contacts are charged and disconnected under the action of the operating mechanism, a vacuum arc will be generated between the contacts. At the same time, due to the special structure of the contacts, an appropriate longitudinal magnetic field will also be generated in the gap between the contacts, which promotes the vacuum arc to maintain a diffusion type and evenly distributes the arc on the surface of the contacts to burn, maintaining a low arc voltage. At the natural zero crossing of the current, residual ions, electrons, and metal vapor can recombine or condense on the surface of the contacts and the shielding cover in microseconds. The dielectric insulation strength of the arc extinguishing chamber fracture is quickly restored, and the arc is extinguished to achieve the purpose of disconnection. Due to the use of longitudinal magnetic field control for vacuum arc, vacuum circuit breakers have strong and stable breaking current capability.

35KV Outdoor High Voltage Vacuum Circuit Breaker Operating Environment

1. The rated current In of the high-voltage vacuum circuit breaker selected according to the working current should not be less than the continuous working current Ig of the circuit under various possible operating modes, that is, In ≥ Ig.

2. Select high-voltage vacuum circuit breaker according to short-circuit stability conditions;

a、 General requirements for short-circuit stability verification;

b、 Thermal effect of short-circuit current;

c、 Short circuit stability verification.

4. Select high-voltage vacuum circuit breaker according to environmental conditions:

a、 Select the ambient temperature for the electrical appliance;

b、 Select the environmental humidity of the electrical appliance;

c、 The impact of high altitude on high-voltage electrical appliances;

d、 The impact of earthquakes on high-voltage electrical appliances.

35KV Outdoor High Voltage Vacuum Circuit BreakerApplicable regionsMid mounted ZW32 outdoor high-voltage vacuum circuit breaker manufacturer direct sales