Overview
The “End fault protection” function protects the section between the current transformer and the open circuit breaker. The switch position of the circuit breaker must be available for the effectiveness of the function. The protection range is determined by the installation location of the current transformer.
For more detailed information on “End fault protection in busbar 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 End fault protection in busbar protection
| Addr. | Parameter | C | Setting Options | Default Setting |
| 50EF 1/3pole | ||||
| _:1 | 50EF 1/3pole:Mode | off on |
on | |
| _:101 | 50EF 1/3pole:Threshold 1 | 1 A @ 100 Irated | 0.030 A to 35.000 A | 0.500 A |
| 5 A @ 100 Irated | 0.150 A to 175.000 A | 2.500 A | ||
| _:102 | 50EF 1/3pole:Threshold 2 | 1 A @ 100 Irated | 0.030 A to 35.000 A | 0.250 A |
| 5 A @ 100 Irated | 0.150 A to 175.000 A | 1.250 A | ||
| _:4 | 50EF 1/3pole:Dropout ratio | 0.50 to 0.99 | 0.95 | |
| _:110 | 50EF 1/3pole:Delay CB open | 0.00 s to 60.00 s | 0.00 s | |
| _:111 | 50EF 1/3pole:Operate delay | 0.00 s to 60.00 s | 0.00 s | |
| _:112 | 50EF 1/3pole:Minimum operate time | 0.00 s to 60.00 s | 0.10 s | |
Logic Diagrams & highlights
End-Fault Protection in the Feeder
Protection with Faults in the Bus Coupler (Dead Zone)
Logic of the End-Fault Protection
