Overview
The “Directional intermittent ground fault protection” function detects the intermittent ground faults in grounded, compensated, or isolated cable systems selectively. It can be operated in 2 different modes:
– Operate only by counting directional ground-current pulses
– Operate by integration of the fault current in combination with a directional criterion by counting directional ground-current pulses
For more detailed information on “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 for Directional intermittent ground fault protection
| Addr. | Parameter | C | Setting Options | Default Setting |
| Stage 1 | ||||
| _:16291:1 | Stage 1:Mode | off on test |
off | |
| _:16291:2 | Stage 1:Operate & flt.rec. blocked | no yes |
no | |
| _:16291:10 | Stage 1:Blk. by meas.- volt. failure | no yes |
yes | |
| _:16291:101 | Stage 1:Directional mode | forward reverse |
forward | |
| _:16291:102 | Stage 1:Pickup mode | with 3I0> with direction |
with 3I0> | |
| _:16291:103 | Stage 1:Operating mode | Counter Integrator and counter |
Counter | |
| _:16291:3 | 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 | ||
| _:16291:105 | Stage 1:Pickup extension time | 0.00 s to 10.00 s | 0.10 s | |
| _:16291:104 | Stage 1:No.of pulses for interm.GF | 2 to 10 | 3 | |
| _:16291:106 | Stage 1:Sum of extended PU times | 0.00 s to 100.00 s | 20.00 s | |
| _:16291:107 | Stage 1:Reset time | 1.00 s to 600.00 s | 300.00 s | |
| _:16291:108 | Stage 1:No. of pulses for operate | 2 to 100 | 5 | |
| _:16291:112 | Stage 1:Minimum operate delay | 0.00 s to 60.00 s | 0.00 s | |
Logic Diagrams & highlights
Logic Diagram of the Directional Intermittent Ground-Fault Protection
Logic Diagram of Direction Determination and Pulse Counting
Pickup, Operate, and Reset Logic in Operating Mode Counter
Pickup, Operate, and Reset Logic in Operating Mode Integrator and Counter
