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The analog channels have fixed connections towards the different function blocks
inside the protection relay’s configuration. Exceptions to this rule are the 12 analog
channels available for the disturbance recorder function. These channels are freely
selectable and a part of the disturbance recorder’s parameter settings.
The line and bus voltages to the protection relay are fed from voltage transformer. The
residual voltage to the protection relay is fed from either residual connected VTs, an
open delta connected VT or internally calculated.
3.4.3.1
Functional diagrams for protection
The functional diagrams describe the protection functionality of the protection relay
in detail and picture the factory default connections.
LED 1
SELGAPC4
OUT_1
IN_8
OSWGAPC7
OR
OUT
IN_1
IN_2
IN_3
OVERVOLTAGE PROTECTION INDICATION
PHPTOV1
3U>(1)
59(1)
BLOCK
START
OPERATE
3U
PHPTOV2
3U>(2)
59(2)
BLOCK
START
OPERATE
3U
PHPTOV3
3U>(3)
59(3)
BLOCK
START
OPERATE
3U
GUID-A6031EA6-2B8B-41D9-BCA8-5EB5446B9594 V1 EN
Figure 15:
Overvoltage protection
Three overvoltage protection stages PHPTOV1...3 offer protection against
overvoltage conditions. All operate signals are connected to the master trip and to
alarm LED 1.
Section 3
1MRS758335 B
REU611 standardized configuration
34
REU611
Application Manual