Functionality; Analog Channel Configuration - ABB RELION REX640 Technical Manual

Section 3
Basic functions
3.20.19.3
3.20.19.4
262

Functionality

The current sum function CMSUM is a phase-by-phase specific summing function for
two current triplets. Output I3P can be used as normal current input for the
application functions using current. Different measurement modes (DFT, RMS, Peak-
to-peak) are supported. Also, positive, negative and zero-sequence components are
calculated for the summed currents. Output IRES provides the calculated residual
current based on the summed currents.
Example configuration:
GUID-15D93AFF-573A-4F15-AB2E-7AE47C0A02A7 V1 EN
Figure 136: Current summing configuration

Analog channel configuration

CMSUM has two analog group inputs which must be properly configured.
Table 250: Analog signals
Input
I3P1
I3P2
See the preprocessing function blocks in this document for the
possible signal sources.
Description
Three-phase currents
Three-phase currents
1MRS759142 C
REX640
Technical Manual