Schneider Electric PM5100 Power factor min/max convention, Power factor sign convention, IEC mode

Chapter 8—Measurements and calculations PowerLogic™ PM5100 series user guide

Power factor min/max convention

The meter uses the following convention for power factor minimums and maximums:

•For negative PF readings, the minimum PF value is the measurement closest to -0 for PF readings between -0 to -1. For positive PF readings, the minimum PF value is the measurement closest to +1 for PF readings between +1 to +0.

•For negative PF readings, the maximum PF value is the measurement closest to -1 for PF readings between -0 to -1. For positive PF readings, the maximum PF value is the measurement closest to +0 for PF readings between +1 to +0.

Power factor minimum and maximum

-1.0

	-0.8		1.0
			.8
	-0.6		.6
Negative PF values	-0.4		.4	Positive PF values
[ - ]				[ + ]
	-0.2		.2
			+0
Minimum PF [ - ]		-0	Maximum PF [ + ]

Power factor sign convention

You can set the power factor sign (PF sign) convention by changing the HMI mode to either IEC or IEEE.

Power factor sign convention

Reactive

Power In

		Quadrant	Quadrant
	2		1
watts negative (–)			watts positive (+)
vars positive (+)			vars positive (+)
power factor (–)			power factor (+)
		Reverse	Normal	Real
		Power Flow	Power Flow
				Power
watts negative (–)			watts positive (+)	In
vars negative (–)			vars negative (–)
power factor (–)			power factor (+)
		Quadrant	Quadrant
3			4

IEC mode

Reactive

Power In

		Quadrant	Quadrant
	2		1
watts negative (–)			watts positive (+)
vars positive (+)			vars positive (+)
power factor (+)			power factor (–)
		Reverse	Normal	Real
		Power Flow	Power Flow
				Power
watts negative (–)			watts positive (+)	In
vars negative (–)			vars negative (–)
power factor (–)			power factor (+)
		Quadrant	Quadrant
3			4

IEEE mode

IEC mode

In IEC mode, the PF sign follows the direction of power flow. PF sign is positive (+) for positive (normal) power flow. PF sign is negative (-) for negative (reverse) power flow.

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