Appendix
A.3 Connection Examples
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
557
Figure A-9 Startup Earth Fault Protection
Connection of DC Voltage Input TD1 with Series-Connected Amplifier 7KG6 for Systems with
Startup Converter
Figure A-10 Rotor Earth Fault Protection
with additional unit 7XR61 for injecting nominal-frequency voltage in the rotor circuit using series
resistor 3PP1336
Note 3PP13 is only necessary if more than 0.2 A
eff
are flowing permanently; (rule: UExc. load > 150 V).
In this case the internal resistors of the 7XR61series device are to be shorted.
Figure A-11 Rotor Earth Fault Protection
with series device 7XR61 for injection of a rated-frequency voltage into the rotor circuit if the sensitive
earth current input is used.
Note 3PP13 is only necessary if more than 0.2 A
eff
are flowing permanently; (rule: UExc. load > 150 V).
In this case the internal resistors of the 7XR61series device are to be shorted.
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