Function Block - ABB RELION REX640 Technical Manual

1MRS759142 C
4.8.1.2
4.8.1.3
4.8.1.4
REX640
Technical Manual

Function block

GUID-7AF40FC8-8E67-40A5-9F62-B144C73E2AB9 V1 EN
Figure 516: Function block
Functionality
The underpower protection function DUPPDPR is used for protecting generators and
prime movers against the effects of very low power outputs or reverse power
condition.
The function operates when the measured active power falls below the set value. The
operating characteristics are according to definite time DT.
This function contains a blocking functionality. It is possible to block the function
outputs, timer or the function itself.
Analog channel configuration
DUPPDPR has two analog group inputs which must be properly configured.
Table 887: Analog inputs
Input
I3P
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 888: Special conditions
Condition
U3P connected to real measurements
Protection functions
Description
Three-phase currents
Three-phase voltages
Description
The function can work with the corresponding one
voltage channel connected if the measurement
mode is set to "PhsA", "PhsB" or "PhsC".
The function can work with the corresponding two
voltage channels connected if the measurement
mode is set to "PhsA", "PhsB" or "PhsC".
The function requires that all three voltage
channels are connected for the other
measurement modes.
Section 4
953