FZN21-40.5 Indoor high voltage vacuum load switch
Model and meaning

Environmental conditions for use
◆The ambient air temperature does not exceed 40℃, and the average temperature measured within 24 hours does not exceed 35℃, and the lowest ambient air temperature is -25℃;
◆The influence of sunlight radiation can be ignored;
◆Altitude not exceeding 1000m;
◆The surrounding air is not obviously polluted by dust, smoke, corrosive, corrosive and/or flammable gases, steam or salt mist;
◆The daily average relative humidity shall not exceed 95%; the daily average water vapor pressure shall not exceed 22kPa; the average relative humidity of the lunar phase shall not exceed 90%; the monthly average water vapor pressure shall not exceed 1.8KPa;
◆Vibration or ground motion from outside the switchgear and control equipment is negligible;◆The amplitude of electromagnetic interference induced in the secondary system does not exceed 1.6kV.
Technical Parameters
|
Name |
Unit |
Combined electrical appliances |
Load switch |
|
Rated voltage |
kV |
40.5 |
|
|
Rated frequency |
Hz |
50 |
|
|
4s rated short-time withstand current |
kA |
16 |
|
|
Rated current |
A |
50 |
1250 |
|
Rated active load breaking current |
kA |
/ |
1250 |
|
Rated closed-loop breaking current Rated cable charging current |
kA |
/ |
1250 |
|
Rated peak withstand current |
kA |
/ |
40 |
|
Rated short-circuit breaking current |
kA |
20 |
/ |
|
Rated cable charging current |
kA |
/ |
21 |
|
1min power frequency withstand voltage (vacuum break, phase-to-phase, phase-to-ground/isolation break) |
kV |
95/110 |
|
|
Lightning impulse withstand voltage (vacuum break, phase-to-phase, phase-to-ground/isolation break) |
kV |
185/215 |
|
|
1min power frequency withstand voltage of control auxiliary circuit |
kV |
2 |
|
|
Mechanical life |
Second-rate |
10000 |
|
|
Allowable wear thickness of vacuum interrupter contact |
mm |
3 |
|
|
Manual operating force |
N·M |
≯250 |
|
Installation Dimensions




