Function Block; Functionality; Analog Channel Configuration - ABB RELION REX640 Technical Manual

1MRS759142 C
4.5.4.2
4.5.4.3
4.5.4.4
REX640
Technical Manual

Function block

GUID-92444957-A01E-46AD-9CDF-7FA20C4F3C98 V1 EN
Figure 429: Function block

Functionality

The positive-sequence overvoltage protection function PSPTOV is used as an
alternative to the ordinary three-phase overvoltage protection. PSPTOV is used for
supervision and for detection of abnormal conditions, and, together with the other
protection functions, increases the security of the protection system.
The function starts when the positive-sequence voltage exceeds the set limit.
PSPTOV operates on definite time (DT) characteristics.
The function contains a blocking functionality. It is possible to block function outputs,
the definite timer or the function itself.

Analog channel configuration

PSPTOV has one analog group input which must be properly configured.
Table 736: 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 737: 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.
Protection functions
Description
Three-phase voltages
Description
The function can work with any two voltage
channels connected but it is recommended to
connect all three voltage channels.
Section 4
787