FZN63-12 Indoor load break switch (LBS) 12KV
The FZN63-12 high-pressure vacuum load switch has the following specific functions:
Switch operation:through the vacuum interrupter to realize the circuit opening and closing, suitable for frequent operation environment.
Overload protection:with overload protection function, can quickly cut off the circuit when the overload current is detected to prevent equipment damage.
High reliability: using vacuum arc extinguishing technology, has the characteristics of long life, low maintenance, suitable for all kinds of harsh environment .
Environment condition
- The altitude: under 1000M.
- The ambient temperature: -25℃-+40℃.
- The relative humidity of air: monthly≤90%, daily≤95%.
- Amplitude: Earthquake degree 8.
- Application occasions should free from fire, inflammables, explosives, corrosives and severe vibration.
Technical parameter
|
No |
Item |
Unit |
Value |
||
|
1 |
Rated voltage |
kV |
12 |
||
|
2 |
Rated frequency |
Hz |
50 |
||
|
3 |
Rated current |
A |
630 |
125 |
|
|
4 |
Rated insulation level |
1min power frequency withstand voltage |
kV |
Arc-quenching chamber fracture 30 |
|
|
Effective value |
Earth , phase 42, insulating fracture 48 |
||||
|
Lightning impulse withstand voltage (peak) |
Earth , phase 75, insulating fracture 85 |
||||
|
5 |
Rated dynamic current (peak) |
kA |
50 |
||
|
6 |
4S thermal current |
kA |
20 |
||
|
7 |
Rated power load breaking current |
A |
630 |
||
|
8 |
Rated closed-loop breaking current |
A |
630 |
||
|
9 |
Rated cable charge breaking current |
A |
10 |
||
|
10 |
Rated breaking no-load transformer capacity |
kV |
1250 |
||
|
11 |
Rated breaking AC current |
A |
3150 |
||
|
12 |
Rated short-circuit closed current |
kA |
50 |
||
|
13 |
Rated current breaking times |
times |
2000 |
||
|
14 |
Mechanical life |
times |
10000 |
||
|
15 |
Permitted wear-thickness of vacuum arc-quenching chamber contact |
mm |
2 |
||
|
16 |
Manual operating torque |
Nm |
>200 |
||
