Overview
The “Rotor ground fault protection (IRgnd>, fn)” function detects faults by injecting a rated-frequency voltage into a rotor circuit and by monitoring the rotor ground current. It monitors the rotor circuit of electrical synchronous machines (generator, motor) for a ground fault, and the rotor circuit of asynchronous machines for a ground fault if the rotor circuit is accessible via a slip ring.
For more detailed information on “Rotor 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 Rotor ground fault protection (IRgnd>, fn)
| Addr. | Parameter | C | Setting Options | Default Setting |
| General | ||||
| _:2311:109 | General:Supervision | off on |
on | |
| _:2311:106 | General:I< supervision | 1.0 mA to 50.0 mA | 2.0 mA | |
| RGF current 1 | ||||
| _:15931:1 | RGF current 1:Mode | off on test |
off | |
| _:15931:2 | RGF current 1:Operate & flt.rec. blocked | no yes |
yes | |
| _:15931:3 | RGF current 1:Threshold | 1 mA to 1600 mA | 10 mA | |
| _:15931:6 | RGF current 1:Operate delay | 0.00 s to 60.00 s | 5.00 s | |
| _:15931:7 | RGF current 1:Dropout delay | 0.00 s to 60.00 s | 0.00 s | |
| RGF current 2 | ||||
| _:15932:1 | RGF current 2:Mode | off on test |
off | |
| _:15932:2 | RGF current 2:Operate & flt.rec. blocked | no yes |
no | |
| _:15932:3 | RGF current 2:Threshold | 1 mA to 1600 mA | 23 mA | |
| _:15932:6 | RGF current 2:Operate delay | 0.00 s to 60.00 s | 1.00 s | |
| _:15932:7 | RGF current 2:Dropout delay | 0.00 s to 60.00 s | 0.00 s | |
Logic Diagrams & highlights
Connecting the Rotor and Measuring the Rotor Ground Current, 7XR61
Connecting the Rotor and Measuring the Rotor Ground Current, 7XR81
Logic Diagram of General Functionalities
Logic Diagram of the Rotor Ground-Fault Protection Stage (IRgnd>, fn)
