monitoring is not only an effective customer service strategy but also a way to
protect a utility's reputation for quality power and service.
CMHAI provides a method for monitoring the power quality by means of the current
waveform distortion. CMHAI provides a short-term 3-second average and a long-
term demand for TDD.
10.1.6 Signals
10.1.6.1 CMHAI Input signals
Table 700: CMHAI Input signals
Name Type Default Description
I_A Signal 0 Phase A current
I_B Signal 0 Phase B current
I_C Signal 0 Phase C current
BLOCK BOOLEAN 0=False Block signal for all bi-
nary outputs
10.1.6.2 CMHAI Output signals
Table 701: CMHAI Output signals
Name Type Description
ALARM BOOLEAN Alarm signal for TDD
10.1.7 Settings
10.1.7.1 CMHAI Non group settings
Table 702: CMHAI Non group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Operation
1=on
5=off
1=on Operation Off / On
Demand interval
0=1 minute
1=5 minutes
2=10 minutes
3=15 minutes
4=30 minutes
5=60 minutes
6=180 minutes
2=10 minutes Time interval for
demand calculation
Demand window
1=Sliding
1=Sliding Demand calculation
window type
Table continues on the next page
Power quality measurement functions 1MRS758755 C
702 REC615 & RER615
Technical Manual
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