ABB Remote I/O RIO600 - 6.1.6.4 Three-phase current fault detection

Application
VMHAI provides a method for monitoring the power quality by means of the voltage
waveform distortion.
Signals
Table 57: VMHAI Input signals
Name Type Default Description
U_A SIGNAL - Phase to earth voltage
A
U_B SIGNAL - Phase to earth voltage
B
U_C SIGNAL - Phase to earth voltage
C
BLOCK - Block through settings
only
Table 58: VMHAI Output signals
Name Type Description
HiAThd BOOLEAN Alarm signal for THD
Settings
Table 59: VMHAI Settings
Name
Values (Range) Unit Step Default Description
Operation On
Off
- - On Operation Off/On
THD Alarm Limit 5.0…100.0 % 0.1 10% Limit of THD
Measuring Mode Worst case
Phase A
Phase B
Phase C
-
- Worst case Specifies the
monitored phase
6.1.6.4 Three-phase current fault detection
Three-phase non-directional overcurrent fault detection PHPTOC
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase non-directional
overcurrent fault detection
PHPTOC 3I> 51P
1MRS757488 H Section 6
Commissioning
RIO600 89
Installation and Commissioning Manual