Identification; Function Block; Functionality; Operation Principle - ABB RELION 620 Series Technical Manual

1MAC504801-IB E
Section 8
8.1
8.1.1
8.1.2
8.1.3
8.1.4
620 series ANSI
Technical Manual
Power quality measurement functions
Current total demand distortion PQI

Identification

Function description
Current total demand distortion

Function block

GUID-972900BB-F0EB-41A7-BEB3-86ABA0F54BDF V1 EN
Figure 336: Function block

Functionality

The current total demand distortion PQI is used for monitoring the current total demand
distortion TDD.

Operation principle

The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are "Enable" and "Disable".
The operation of the current distortion monitoring function can be described with a
module diagram. All the modules in the diagram are explained in the next sections.
Power quality measurement functions
IEC 61850 IEC 60617
identification identification
CMHAI PQM3I
Section 8
ANSI/IEEE C37.2
device number
PQI
669