ABB RELION REX640 Technical Manual page 871

1MRS759142 F
4.5.4 Positive-sequence overvoltage protection PSPTOV (ANSI
59PS)
4.5.4.1 Identification
Function description
Positive-sequence overvoltage pro-
tection
4.5.4.2 Function block
Figure 488: Function block
4.5.4.3 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.
4.5.4.4 Analog channel configuration
PSPTOV has one analog group input which must be properly configured.
Table 812: Analog inputs
Input
U3P
There are a few special conditions which must be noted with the configuration.
REX640
Technical Manual
See the preprocessing function blocks in this document for the possible
signal sources.
IEC 61850 IEC 60617
identification identification
PSPTOV U1>
Description
Three-phase voltages
Protection functions
ANSI/IEEE C37.2
device number
59PS
871