| Main technical parameters | ||||
| Item | Parameter load switch | Combination electric appliance | The circuit breaker | |
| Rated voltage (kV) | 12 | 12 | 12 | |
| Rated frequency (Hz) | 50 | 50 | 50 | |
| Rated current od main busbar (A) | 630 1250 | 630 | 630 1250 | |
| Rated current (A) | 630 1250 | 125 | 630 1250 | |
| Rated short-circuit breaking current (kA) | 31.5 | |||
| Rated transfer current (A) | 1700 | |||
| Thermally stable current (effective value)(kA) |
Primary loop 4s | 20 | 20/25/31.5 | |
| Grounding switch 2s | ||||
| Connect the loop with ground for 2s | 17.3 | 17.4/21.75/27.4 | ||
| Dynamic stablized current (peak)(kA) |
The primary loop | 50 | 50/63/80 | |
| Grounding switch | ||||
| Connect the loop with ground for 2s | 43.5 | 43.5/54.6/69.6 | ||
| Rated short-circuit close current (peak)(kA) |
Load switch | 50 | 50/63/80 | |
| Grounding switch 2s | ||||
| 1min power frequency withstand voltage (kV) | To the ground and between | 42 | 42 | |
| The isolation fracture | 400/600 | 48 | 48 | |
| Thunderbolt shock voltage tolerance (kV) |
To the ground and between | 75 | 75 | 95 |
| The isolation fracture | 85 | 85 | 110 | |
