| Item |
Unit |
Value |
| Load switch |
circuit breaker |
Combination switchboard |
| Rated voltage |
kV |
12 |
| Rated frequence |
Hz |
50 |
| Main busbar rated current |
A |
630 |
| Rated current of the functional units |
630 |
125 |
| rated insulation level |
power frequency withstand voltage |
phase to earth、phase to phase |
kV |
42 |
| phase to fracture |
48 |
lightning impulse withstand voltage
( peak) |
phase to earth、phase to phase |
75 |
| phase to fracture |
85 |
| Rated short-time withstand current |
Main circuit/Earthing switch |
kA |
20 |
/ |
| Ground Loop |
17.3 |
/ |
| Rated short circuit duration |
Main circuit/Earthing switch |
s |
4 |
/ |
| Ground Loop |
2 |
/ |
| Rated peak withstand current |
circuit/Earthing switch |
kA |
50 |
/ |
| |
Ground Loop |
kA |
43.4 |
/ |
| Rated active load breaking current |
A |
630 |
/ |
/ |
| Rated closed-loop breaking current |
A |
630 |
/ |
/ |
| Rated short circuitbreaking current |
kA |
/ |
20 |
31.5 |
| Rated short-circuit making current（peak）（Main circuit/Earthing switch） |
kA |
50 |
80 |
| Grounding switch closing times |
Times |
2 |
| Rated transfer current |
A |
/ |
/ |
1600 |