Panasonic KW2M-A User Manual page 11

・Demand
Item
Present demand
* Please use this demand function as your standard.
The demand value calculated with this function is not guaranteed.
<Glossary>
Eco-POWER METER defines as below.
THD
Ratio of harmonic distortion (voltage or current) for the fundamental frequency.
(total harmonic
Lower the value shows that the distortion is less.
distortion)
Sinusoidal wave other than fundamental frequency.
It has frequency that is whole-number multiple of the fundamental frequency.
Harmonics
The frequency that has 2 times frequency (half wavelength) is called 2
harmonics.
Voltage The different between each phase-voltage due to the load unbalancing.
unbalancing It is calculated as below.
Current The difference between each-phase current due to the load unbalancing.
unbalancing It is calculated as below.
Power
Voltage under 5% of rating is kept 5ms or more,
interruption
Set the ratio for the rated voltage and it is used for threshold.
Under voltage
Voltage under the set ratio is kept 5ms or more, it will judge as under voltage.
Set the ratio for the rated current and it is used for threshold.
Under current
Current under the set ratio is kept 5ms or more, it will judge as under current.
Set the ratio for the rated current and it is used for threshold.
Over current
Current over the set ratio is kept 5ms or more, it will judge as over current.
Demand by Based on IEC61557-12 Performance measuring and monitoring devices (PMD)
IEC61557-12
Sliding block interval
demand
fixed block interval
demand
Current demand
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Active
Reactive
Apparent
*1
Active (export)
Reactive (export)
Current
|Max. (Min.) voltage of all phase－average voltage|
|Max. (Min.) current of all phase－average current|
It calculates by measured power via CT with setting interval.
Set power interval by 1 to 60(min.) (every 1-min.). It calculates demand
during latest finished interval and displays.
One interval is started every setting time.
It calculates by measured power via CT with setting interval.
Set power interval by 1 to 60 (min.) (every 1-min.) It calculates demand
during latest finished interval and displays. After one interval finishes, the
next interval starts.
It calculates based on a thermal demand meter.
It measures an average current (current demand) within setting interval and
the max. value is considered as max. current demand.
Unit
W
var
VA
0.000k to 999.9M
W
var
A
Average voltage
Average current
Display data range
Present value
Max. demand
×100 (%)
×100 (%)
nd
-order