ABB RELION REX640 - 4.5.4.1 Identification; 4.5.4.2 Function block; 4.5.4.3 Functionality; 4.5.4.4 Analog channel configuration

4.5.4 Positive-sequence overvoltage protection PSPTOV (ANSI
59PS)
4.5.4.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Positive-sequence overvoltage pro-
tection
PSPTOV U1> 59PS
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 Description
U3P Three-phase voltages
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.
1MRS759142 F
Protection functions
REX640
Technical Manual
871