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

Section 4
Protection functions
4.6.1.2
4.6.1.3
4.6.1.4
838

Function block

GUID-8043FBFA-D45D-4A87-83C4-B0D779B4053C V1 EN
Figure 454: Function block

Functionality

The frequency protection function FRPFRQ is used to protect network components
against abnormal frequency conditions.
The function provides basic overfrequency, underfrequency and frequency rate-of-
change protection. Additionally, it is possible to use combined criteria to achieve even
more sophisticated protection schemes for the system.
The function contains a blocking functionality. It is possible to block function outputs,
timer or the function itself.

Analog channel configuration

FRPFRQ has one analog group input which must be properly configured.
Table 803: 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 804: 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
Description
Three-phase voltages
Description
The function requires that at least one phase or
phase-to-phase voltage channel is connected.
1MRS759142 C
REX640
Technical Manual