Open Access
Table 1
Setting values and operation time limits of improved ground protection.
| Protecting mounting locations | Ground protection configuration | Protection setting value/A | Time limit for action/s |
|---|---|---|---|
| Outlet Circuit Breakers QF1, QF2, QF3 | General grounding protection | 30 | 2.6 |
| Highly sensitive grounding protection | 3 | 4.5 | |
| Branch Circuit Breakers QF11 | General grounding protection | 10 | 2.3 |
| Highly sensitive grounding protection | 3 | 4.2 | |
| QF12 | General grounding protection | 10 | 2.3 |
| Highly sensitive grounding protection | 3 | 4.2 | |
| Boundary circuit breaker QF13 | General grounding protection | 10 | 2.0 |
| Highly sensitive grounding protection | 3 | 3.9 |
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