what is the meaning? FZW28-12F Outdoor high voltage demarcation vacuum load switch
The high-voltage load switch is an electrical appliance whose function is between the high-voltage circuit breaker and the high-voltage isolation switch. The high-voltage load switch is often used in series with the high-voltage fuse; it is used to control the power transformer. The high-voltage load switch has a simple arc extinguishing device, because it can switch on and off a certain load current and overload current. However, it cannot disconnect the short-circuit current, so it is generally used in series with a high-voltage fuse for short-circuit protection.
FZW28-12F Outdoor high voltage demarcation vacuum load switch
The high-voltage switch has been serialized, and the model meaning is as follows:
1. Category of high voltage switch: F─Load switch, G─Isolation switch, R─fuse
2. N-indoor type, W-outdoor type
3. Design serial number
4. Voltage level (kV)
5. R ─ code with fuse, (without fuse is not indicated)
6. S-fuse is installed at the upper end of the switch (installed at the lower end of the switch is not indicated)
Selection Notes:
1. Rated current, leave a margin of about 30%
2. Rated voltage: the same or higher than the actual voltage
3. The breaking current should be consistent with the design requirements
4. The operating frequency should preferably exceed the design requirements by about 10%5, and the volume conforms to the actual conditions of the site
6. Reliability, safety first
other models, FZRN21-12, FZRN25-12, FZRN40-12, FZRN64-12
12KV vacuum load break break switch
