Siemens SG8158-00 manual Power Conventions

Appendix B: Metering

B.2 Power Conventions

Line	Load
Export	Import
Reverse	Forward
Negative	Positive
(kW/kVAR supplied	(kW/kVAR consumed
by the load)	by the load)

Ø=90°, +kVAR, kVARh Imported, Power Factor = 0

Ø=90 to 180° Power Factor Lead

Ø=180°, -kW, kWh Exported, Power Factor = 1

Ø=0 to 90°

Power Factor Lag

Phase Angle Ø	Ø=0°, +kW,
	kWh Imported,
	Power Factor = 1

B

Ø=180 to 270°	Ø=270 to 360°
Power Factor Lag	Power Factor Lead

Ø=270°, -kVAR, kVARh Exported, Power Factor = 0

Figure B.1 Complex Power Plane

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