Overview
The “Non-directional intermittent ground fault protection” function is used to protect against intermittent ground faults which occur, for example, in cables due to poor insulation or water ingress in cable joints.
For more detailed information on “Non-directional intermittent ground fault protection” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Structure/Embedding of the Function
Setting Parameters
Setting parameters of the Function
| Addr. | Parameter | C | Setting Options | Default Setting |
| Stage 1 | ||||
| _:11341:1 | Stage 1:Mode | off on test |
off | |
| _:11341:2 | Stage 1:Operate & flt.rec. blocked | no yes |
no | |
| _:11341:3 | Stage 1:Threshold | 1 A @ 100 Irated | 0.030 A to 35.000 A | 1.000 A |
| 5 A @ 100 Irated | 0.15 A to 175.00 A | 5.00 A | ||
| 1 A @ 50 Irated | 0.030 A to 35.000 A | 1.000 A | ||
| 5 A @ 50 Irated | 0.15 A to 175.00 A | 5.00 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 1.000 A | ||
| 5 A @ 1.6 Irated | 0.005 A to 8.000 A | 5.000 A | ||
| _:11341:101 | Stage 1:No. pickups till interm.GF | 2 to 10 | 3 | |
| _:11341:102 | Stage 1:Pickup extension time | 0.00 s to 10.00 s | 0.10 s | |
| _:11341:103 | Stage 1:Sum of extended PU times | 0.00 s to 100.00 s | 20.00 s | |
| _:11341:104 | Stage 1:Reset time | 1.00 s to 600.00 s | 300.00 s | |
Logic Diagrams & highlights
Logic of the Non-Directional Intermittent Ground-Fault Protection
Fault Detection of the Intermittent Ground-Fault Protection
Example of Selectivity Criteria of the Intermittent Ground-Fault Protection
