calculated voltage and frequency difference across the circuit breaker to be
synchronized. ASGCSYN also participates in voltage and frequency matching for
network breaker synchronization.
9.6.4 Analog channel configuration
ASGCSYN has two analog group inputs which must be properly configured.
Table 1513: Analog inputs
Input Description
U3P1 Three-phase voltages (generator side)
U3P2 Three-phase voltages (bus side)
See the preprocessing function blocks in this document for the possible
signal sources.
There are a few special conditions which must be noted with the configuration.
Table 1514: Special conditions
Condition Description
U3P1 and U3P2 connected to
real measurements
When one voltage channel from the generator side is connec-
ted to channel 1 of U3P1 and one voltage channel from the
bus side is connected to channel 1 of U3P2, the function can
only work if UTVTR's
VT connection
settings on the genera-
tor and bus sides are similar.
The function can work if one voltage channel from the gen-
erator side is connected to channel 1 of U3P1 and three
voltage channels from the bus side are connected to U3P2.
The function can work if one voltage channel from the gener-
ator side is connected to channel 1 of U3P1 and two voltage
channels along with the residual voltage from the bus side
are connected to U3P2.
The function can work if three voltage channels from the
generator side are connected to U3P1 and one voltage chan-
nel from the bus side is connected to channel 1 of U3P2.
The function can work if two voltage channels and the resid-
ual voltage from the generator side are connected to U3P1
and one voltage channel from the bus side is connected to
channel 1 of U3P2.
Dissimilar VT connection set-
tings for UTVTR on the gener-
ator and bus sides
The function requires that all three voltage channels or two
voltage channels and the residual voltage are connected to
either U3P1 or U3P2.
Improper analog channel configuration causes a validation error if the analog
channels are not completely configured or they do not match with certain settings.
For troubleshooting, check the contents of this chapter and also the preprocessing
blocks in this document. The configuration can be written to the protection relay
once the mismatch is corrected.
Control functions
1MRS759142 F
1558 REX640
Technical Manual
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