10
Power quality measurement functions
10.1
Current total demand distortion CMHAI
10.1.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE
C37.2 device
number
Current total demand distortion
CMHAI
PQM3I
PQM3I
10.1.2
Function block
Figure 355: Function block
10.1.3
Functionality
The current total demand distortion function CMHAI 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 "On" and "Off".
The operation of CMHAI can be described with a module diagram. All the modules in
the diagram are explained in the next sections.
BLOCK
ALARM
Distortion
measure-
ment
I_A
I_B
I_C
Demand
calculation
Figure 356: Functional module diagram
Power quality measurement functions
1MRS758755 C
700
REC615 & RER615
Technical Manual
Содержание Relion REC615
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