Functionality - ABB RELION REX640 Technical Manual

1MRS759142 C
8.1.11.3
8.1.11.4
8.1.11.5
REX640
Technical Manual

Functionality

The sequence voltage measurement function VSMSQI provides limit value
supervision outputs (U2_HIGH_AL, U2_HIGH_WARN, U1_HIGH_AL,
U1_HIGH_WARN, U1_LOW_WRN, U1_LOW_AL, U0_HIGH_AL,
U0_HIGH_WARN). Setting parameters Ps Seq V on delay time, Ps Seq V off delay
time, Ng Seq V on delay time, Ng Seq V off delay time, Zro Seq V on delay time, Zro
Seq V off delay time are used for controlling the activation and the deactivation of
alarm and warning outputs.
Instantaneous sequence voltages in volt are available for application configurations
through outputs U2_INST, U1_INST and U0_INST.
Analog channel configuration
VSMSQI has one analog group input which must be properly configured.
Table 1265: Analog inputs
Input
U3P
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 1266: Special conditions
Condition
U3P connected to real measurements
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.
Signals
Table 1267: VSMSQI Input signals
Name Type
U3P SIGNAL
Measurement functions
Description
Three-phase voltages
Description
The function requires that any two voltage
channels are connected.
Default Description
- Three-phase voltages
Section 8
1323