A dedicated non-directional earth-fault protection block EFHPTOC is intended for
protection against double earth-fault situations in isolated or compensated networks.
This protection function uses the calculated residual current originating from the
phase currents.
All operate signals are connected to the Master Trip and to alarm LED 2.
LED 2
RESIDUAL OVERVOLTAGE PROTECTION
ROVPTOV1
U
0
>(1)
59G(1)
BLOCK
START
OPERATE
U
0
ROVPTOV2
U
0
>(2)
59G(2)
BLOCK
START
OPERATE
U
0
ROVPTOV3
U
0
>(3)
59G(3)
BLOCK
START
OPERATE
U
0
OSWGAPC9
OR
OUT
IN_9
IN_10
IN_11
SELGAPC4
OUT_2
IN_11
GUID-DAC9D1F8-DB13-4A23-807F-EABE477407DC V1 EN
Figure 108:
Residual overvoltage protection
The residual overvoltage protection ROVPTOV provides earth-fault protection by
detecting abnormal level of residual voltage. It can be used, for example, as a non-
selective backup protection for the selective directional earth-fault functionality. The
operation signal is also connected to alarm LED 2.
1MRS757456 D
Section 3
REF611 standardized configurations
REF611
127
Application Manual
Summary of Contents for REF611
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