Function Block - ABB RELION REX640 Technical Manual

1MRS759142 C
10.2.2
10.2.3
REX640
Technical Manual

Function block

GUID-93904F9E-D519-4454-98CE-B2A7387F48A3 V1 EN
Figure 831: Function block
Functionality
Harmonic voltage values are available as measurements for each harmonic and THD.
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) which can be connected to other logics in the configuration tool. Blocks,
such as limiters, timers and multipurpose analog protection, can be used 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.
Power quality measurement functions
Section 10
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