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

1MRS759142 C
4.5.1.2
4.5.1.3
4.5.1.4
REX640
Technical Manual

Function block

GUID-8B2A36C5-09C8-4EE7-AA05-7BA6595923B6 V1 EN
Figure 421: Function block

Functionality

The three-phase overvoltage protection function PHPTOV is applied on power
system elements, such as generators, transformers, motors and power lines, to protect
the system from excessive voltages that could damage the insulation and cause
insulation breakdown. The three-phase overvoltage function includes a settable value
for the detection of overvoltage either in a single phase, two phases or three phases.
PHPTOV includes both definite time (DT) and inverse definite minimum time
(IDMT) characteristics for the delay of the trip.
The function contains a blocking functionality. It is possible to block function outputs,
timer or the function itself.

Analog channel configuration

PHPTOV has one analog group input which must be properly configured.
Table 703: 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 704: 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
Protection functions
Description
Three-phase voltages
Description
The function can work with one voltage channel
Num of start phases is set to "1 out of
connected if
3". Otherwise, all three voltage channels must be
connected.
Section 4
767