Electricity Charge; Power Factor - Panasonic KW8M User Manual

6.1.5 Electricity Charge

・It displays the standard electricity charge for the integral electrical power.

6.1.6 Power factor

・It displays the loads' power factor.
*Before start measuring, select phase and wire system according to the measured load.
When selected system does not meet it, it can not measure correctly. (Refer to the explanation of
setting mode.)
Sample of lagging phase
・How to calculate power factor
Eco-POWER METER displays power factor by calculating as below.
Power factor operation is a method assuming balanced load. The error might be big when it measures
unbalanced load.
Single-phase two-wire
Single-phase three-wire
Three-phase four-wire
Three-phase three-wire
[CHARGE]
Lighting
*When the value exceeds '99999999',
Sample of leading phase
[cosφ]
Lighting
Instantaneous electric power
PF＝
PF＝
a ｘ
PF＝
√
3
KW8M Eco-POWER METER (1A/5ACT input type)
Voltage ｘ Current
Instantaneous electric power
Average of
ｘ
each phase V
Instantaneous electric power
Average of
ｘ ｘ
each phase V
31
will be displayed.
Average of
1P3W: a=2
each phase A
3P4W: a=3
Average of
each phase A