Three-Phase Residual Overvoltage Protection Rovptov - ABB RELION 630 Series Applications Manual

1MRS757582 C
3.2.6.7
REG630
Application Manual
DIRECTIONAL EARTH-FAULT PROTECTION
FUSE_FAILURE
FUSE_FAILURE
RESIDUAL OVERVOLTAGE PROTECTION
FUSE_FAILURE
FUSE_FAILURE
GUID-C4EFC490-502C-4B27-A542-1CB2C078A7EB V1 EN
Figure 12: Generator stator earth-fault protection

Three-phase residual overvoltage protection ROVPTOV

The residual overvoltage function blocks operate with definite-time characteristics. A
set of three phase voltages, U3P, is connected to the inputs. The configuration includes
two instances of residual overvoltage protection.
A common operate and start signal from both residual overvoltage protection
functions and directional earth fault signals is connected to an OR-gate to form a
combined operate and start signal which provides a LED indication on the LHMI.
DEFLPDEF(1)
I >
0
67N-1
I START
0
U0 OPERATE
BLOCK
ENA_MULT
RCA_CTL
DEFHPDEF(1)
I >>
0
67N-2
I START
0
U0 OPERATE
BLOCK
ENA_MULT
RCA_CTL
ROVPTOV(1)
U >
0
59G
3U START
BLOCK OPERATE
ROVPTOV(2)
U >
0
59G
3U START
BLOCK OPERATE
Section 3
REG630 variants
COMMON
OR
OPERATE
35