2.6 Power in AC

Outcome 6 of 6 in domain 2 · Alternating current and signals

Real, reactive, power factor.

My targets

I declare:

Distinguish real, reactive and apparent power, and say which the inverter or generator must supply.
Calculate a load’s power factor and explain why an unloaded motor has a poor one.
Measure an appliance’s consumption with a plug-in wattmeter and compare to V × I.
Size the apparent power of a small inverter for a tool or a fridge, start-up included.
Explain power factor correction by capacitor and what a "PFC" charger does to the grid.
Diagnosis: an inverter that trips on an appliance "smaller than its rating", start-up, power factor or waveform.