Functionality - ABB RELION REX640 Technical Manual

Section 10
Power quality measurement functions
10.1.3
10.1.4
10.1.5
1602

Functionality

Harmonic current values are available as measurements for each harmonic, THD and
TDD. There are also direct current component and fundamental frequency values. The
values of three phases are calculated separately.
There are short-time sliding measurement mean values (3 seconds, 1 minute or 5
minutes). In the configuration tool these values can be connected to other logics.
Blocks can be used as limiters, timers and multipurpose analog protection, and alarms
can be created when needed.
Non-sliding 10-minute measured mean values are available via communication to
substation monitoring products such as COM600S. Only the main function part with
an analog signal input must be connected in relay configuration. Data can be collected
and stored with the substation monitoring system to the historian database.
These mean values can also be found in the LHMI menus of the protection relay and
WHMI.
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
CHMHAI has one analog group input which must be properly configured.
Table 1438: Analog inputs
Input
I3P
See the preprocessing function blocks in this document for the
possible signal sources.
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.
Description
Three-phase currents
1MRS759142 C
REX640
Technical Manual