Analog Channel Configuration - ABB RELION REX640 Technical Manual

Section 10
Power quality measurement functions
10.2.4
10.2.5
1614
The applicable power quality standards include EN 50160:2010,
IEEE 519-2014, IEC 61000-4-7:2002+A1:2008 and IEC
61000-4-30:2015.

Analog channel configuration

VHMHAI has one analog group input which must be properly configured.
Table 1445: 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 1446: 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
in this document. The configuration can be written to the protection relay once the
mismatch is corrected.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "on" and "off". Changes will result to reset the
function internal data.
The operation of VHMHAI can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
Description
Three-phase voltages for voltage harmonic
measurement function VHMHAI
Description
The function requires that all three voltage
channels are connected.
1MRS759142 C
REX640
Technical Manual