Mikro DPM380 - Appendix; Demand Calculation

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11. Appendix
11.1. DEMAND CALCULATION
11.1. DEMAND CALCULATION
Demand parameters are used to show average values over a
demand interval.This power meter using sliding block method.
The demand value is based on interval divide by sub-interval
time. Example is shown below:
SETTING: Interval time = 180 seconds ; sub-interval = 3
Measurement= interval time/sub-interval= 180/3= 60 seconds
i
s1
i
s2
i
s3
i
s4
i
s5
---------
---------
i
d1
=(i
s1
+i
s2
+i
s3
)/3
60s
60s
60s
60s
60s
i
d2
=(i
s2
+i
s3
+i
s4
)/3
i
d3
=(i
s3
+i
s4
+i
s5
)/3
---------
---------