ABB RELION 670 Series Technical Manual page 723

1MRK 502 066-UUS B
ANSI06000447 V1 EN-US
Figure 384: Two stage directional current measurement in the general application
The sensitivity of the rotor ground fault protection is dependent of the rotor winding capacitance
to ground and the set pick-up current level of the General current and voltage protection
(CVGAPC). The sensitivity is shown in figure 385.
Technical manual
Operating Region
I
INJECTED
V
multipurpose function
INJECTED
en06000447_ansi.vsd
Section 11
Multipurpose protection
717