Voltage Total Harmonic Distortion Monitoring Vmhai - ABB RED615 Technical Manual

1YHT530004D05 D
10.2
10.2.1
10.2.2
10.2.3
10.2.4
615 series
Technical Manual

Voltage total harmonic distortion monitoring VMHAI

Identification
Function description
Voltage total harmonic distortion
monitoring
Function block
GUID-CF203BDC-8C9A-442C-8D31-1AD55110469C V1 EN
Figure 410: Function block
Functionality
The distortion monitoring function VMHAI is used for monitoring the voltage total
harmonic distortion THD.
Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of the voltage distortion monitoring function can be described with a
module diagram. All the modules in the diagram are explained in the next sections.
U_A_AB
U_B_BC
U_C_CA
BLOCK
GUID-615D1A8A-621A-4AFA-ABB0-C681208AE62C V1 EN
Figure 411: Functional module diagram
Power quality measurement functions
IEC 61850
identification
VMHAI
Distortion
Demand
measure-
calculation
ment
Section 10
IEC 60617 ANSI/IEEE C37.2
identification device number
PQM3U PQM3V
ALARM
769