Table 1528: Special conditions
Condition Description
U3P1 and U3P2 connected to
real measurements
When one voltage channel from the Bus B side is connected
to channel 1 of U3P1 and one voltage channel from the Bus A
side is connected to channel 1 of U3P2, the function can only
work if UTVTR's VT connection settings on the Bus A and Bus
B sides are similar.
The function can work if one voltage channel from the Bus
B side is connected to channel 1 of U3P1 and three voltage
channels from the Bus A side are connected to U3P2.
The function can work if one voltage channel from the Bus
B side is connected to channel 1 of U3P1 and two voltage
channels along with the residual voltage from the Bus A side
are connected to U3P2.
The function can work if three voltage channels from the Bus
B side are connected to U3P1 and one voltage channel from
the Bus A side is connected to channel 1 of U3P2.
The function can work if two voltage channels along with the
residual voltage from the Bus B side are connected to U3P1
and one voltage channel from the Bus A side is connected to
channel 1 of U3P2.
Dissimilar VT connection set-
tings for UTVTR on the Bus A
and Bus B sides
The function requires that all three voltage channels or two
voltage channels along with the residual voltage are connec-
ted 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.
9.7.5 Operation principle
The function can be enabled and disabled with the
Operation
setting. The
corresponding parameter values are "on" and "off".
The operation of ASNSCSYN can be described with a module diagram. All the
modules in the diagram are explained in the next sections.
Control functions
1MRS759142 F
1588 REX640
Technical Manual
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