Analog Channel Configuration - ABB RELION REX640 Technical Manual

Section 9
Control functions
9.6.4
1400
The voltage and frequency matching function issues raise or lower pulse commands
to AVR and the governor to match the voltage and frequency, based on the calculated
voltage and frequency difference across the circuit breaker to be synchronized.
ASGCSYN also participates in voltage and frequency matching for network breaker
synchronization.

Analog channel configuration

ASGCSYN has two analog group inputs which must be properly configured.
Table 1353: Analog inputs
Input
U3P1
U3P2
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 1354: Special conditions
Condition
U3P1 and U3P2 connected to real measurements
Dissimilar VT connection settings for UTVTR on
the generator and bus sides
Description
Three-phase voltages (generator side)
Three-phase voltages (bus side)
Description
When one voltage channel from the generator side
is connected 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 generator and bus
sides are similar.
The function can work if one voltage channel from
the generator 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 generator 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 channel from the bus side is
connected to channel 1 of U3P2.
The function can work if two voltage channels and
the residual voltage from the generator side are
connected to U3P1 and one voltage channel from
the bus side is connected to channel 1 of U3P2.
The function requires that all three voltage
channels or two voltage channels and the residual
voltage are connected to either U3P1 or U3P2.
1MRS759142 C
REX640
Technical Manual