Overview
The function “Rotor ground fault protection (1-3 Hz)” 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. It detects faults by coupling a low-frequency square-wave voltage into the rotor circuit and monitoring the rotor ground current.
For more detailed information on “Rotor ground fault protection (1-3 Hz)” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Structure/Embedding of the Function
Setting Parameters
General setting parameters
| Addr. | Parameter | C | Setting Options | Default Setting |
| General | ||||
| _:2311:103 | General:Threshold Qc < | 0.00 mAs to 1.00 mAs | 0.02 mAs | |
| _:2311:104 | General:Brush supervi- sion | off on |
off | |
| _:2311:106 | General:Dropout delay | 0.00 s to 60.00 s | 1.00 s | |
| _:2311:101 | General:V-control | Setting options depend on configuration | ||
| _:2311:102 | General:V-measurement | Setting options depend on configuration | ||
Setting parameters for R< Stage
| Addr. | Parameter | C | Setting Options | Default Setting |
| RGF 1-3Hz R< 1 | ||||
| _:17341:1 | RGF 1-3Hz R< 1:Mode | off on test |
off | |
| _:17341:2 | RGF 1-3Hz R< 1:Operate & flt.rec. blocked | no yes |
yes | |
| _:17341:3 | RGF 1-3Hz R< 1:Threshold R < |
1.0 kΩ to 80.0 kΩ | 40.0 kΩ | |
| _:17341:6 | RGF 1-3Hz R< 1:Operate delay | 0.00 s to 60.00 s | 10.00 s | |
| RGF 1-3Hz R< 2 | ||||
| _:17342:1 | RGF 1-3Hz R< 2:Mode | off on test |
off | |
| _:17342:2 | RGF 1-3Hz R< 2:Operate & flt.rec. blocked | no yes |
no | |
| _:17342:3 | RGF 1-3Hz R< 2:Threshold R < |
1.0 kΩ to 80.0 kΩ | 5.0 kΩ | |
| _:17342:6 | RGF 1-3Hz R< 2:Operate delay | 0.00 s to 60.00 s | 1.00 s | |
Setting parameters for Test stage
| Addr. | Parameter | C | Setting Options | Default Setting |
| RGF 1-3Hz tst# | ||||
| _:1 | RGF 1-3Hz tst#:Mode | off on test |
off | |
| _:101 | RGF 1-3Hz tst#:Test resistor | 1.0 kΩ to 10.0 kΩ | 3.3 kΩ | |
Logic Diagrams & highlights
Switching Principle of the Rotor Winding Tension
Connection Example for Excitation fed via Slip Rings
Connection Example for Excitation via Rotating Rectifiers
Waveforms of the Residual Voltage Vg, the Shunt Voltage Vmeas and the Measuring Current Ig
Logic Diagram General Functionality
Logic Diagram of the R< Stage
Logic Diagram of the Test Stage
