Overview
The “Overvoltage protection with zero sequence voltage/residual voltage” function detects ground faults in isolated or arc-suppression-coil-grounded systems, determines the phase affected by the ground fault and works with electrical machines to detect ground faults in the stator winding.
For more detailed information on “Overvoltage protection with zero sequence voltage/residual voltage” 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 | ||||
| _:331:1 | Stage 1:Mode | off on test |
off | |
| _:331:2 | Stage 1:Operate & flt.rec. blocked | no yes |
no | |
| _:331:10 | Stage 1:Blk. by meas.- volt. failure | no yes |
yes | |
| _:331:109 | Stage 1:Detection of faulty phase | no yes |
no | |
| _:331:8 | Stage 1:Method of measurement | fundamental comp. fund. comp. long filter RMS value |
fundamental comp. | |
| _:331:3 | Stage 1:Threshold | 0.300 V to 340.000 V | 30.000 V | |
| _:331:4 | Stage 1:Dropout ratio | 0.90 to 0.99 | 0.95 | |
| _:331:107 | Stage 1:Pickup delay | 0.00 s to 320.00 s | 0.00 s | |
| _:331:6 | Stage 1:Operate delay | 0.00 s to 60.00 s | 3.00 s | |
| _:331:101 | Stage 1:V> healthy ph- to-gnd volt. | 0.300 V to 200.000 V | 75.000 V | |
| _:331:104 | Stage 1:V< faulty ph-to- gnd volt. | 0.300 V to 200.000 V | 40.000 V | |
Logic Diagrams & highlights
Logic Diagram of an Overvoltage Protection with Zero-Sequence Voltage/Residual Voltage Stage
