Section 7.0 HMI Introduction
HGA IOM
86
•
Phase C Voltage (Blue) and Phase C current (Yellow) are in phase and the same
polarity.
Figure 44: VLine & ILine Waveform Plot of a Properly Connected
HarmonicGuard
®
Active filter (unit in stopped state)
Note:
The example VLine & ILine Waveform Plot screens apply to rectifier loads only. For low
power factor loads, the VLine & ILine waveform screen will appear different.
The table below shows what the VLine & ILine Waveform Plot Sub Screen would look like with
various connection errors present in the system.
Table 28: VLine & ILine Waveform Plot Screen Examples when Typical Connection
Errors Present in System
VLine & ILine Waveform Plot Sub Screen with
Rectifier Load
Connection Error
Description
Connection Error
Resolution
Phase rotation is Incorrect:
Phase A leads Phase C
instead of Phase C leading
Phase A.
To correct, swap Phase
A and Phase C
HarmonicGuard
®
Active
filter power connections
AND swap Phase A and
Phase C system CT
current feedback then
recheck plot.
