Section 10 Power quality measurement functions
10.1 Current total demand distortion PQI
10.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Current total demand distortion CMHAI PQM3I PQI
10.1.2 Function block
GUID-972900BB-F0EB-41A7-BEB3-86ABA0F54BDF V1 EN
Figure 525: Function block
10.1.3 Functionality
The current total demand distortion function PQI is used for monitoring the current total
demand distortion TDD.
10.1.4 Operation principle
The function can be enabled and disabled with the Operation setting. The corresponding
parameter values are “Enable” and “Disable”.
The operation of PQI can be described with a module diagram. All the modules in the
diagram are explained in the next sections.
1MAC059074-MB A Section 10
Power quality measurement functions
615 series ANSI 1033
Technical Manual
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