ABB Remote I/O RIO600 - Page 95

CMHAI provides a method for monitoring the power quality by means of the current
waveform distortion.
Signals
Table 54: CMHAI Input signals
Name
Type Default Description
I_A SIGNAL - Phase A current
I_B SIGNAL - Phase B current
I_C SIGNAL - Phase C current
BLOCK - Block through settings
only
Table 55: CMHAI Output signals
Name Type Description
HiATdd BOOLEAN Alarm signal for TDD
Settings
Table 56: CMHAI Settings
Name
Values (Range) Unit Step Default Description
Operation On
Off
- - On Operation Off/On
TDD Alarm Limit 5.0…100.0 % 0.1 10% Limit of TDD
Measuring Mode Worst case
Phase A
Phase B
Phase C
-
- Worst case Specifies the
monitored phase
Voltage total demand distortion monitoring VMHAI
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Voltage total demand distortion
monitoring
VMHAI PQM3U PQM3V
1MRS757488 H Section 6
Commissioning
RIO600 87
Installation and Commissioning Manual