ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades 3 phase kVA to amps per phase query

Funnily enough, I had remembered that kW needs power factor calculations, I had just gone completely blank on the kVA - but hey ho, if I hadn't got stuck, I wouldn't have stumbled upon this place.

Cheers

Steve

Just a note about power factor.
In a reactive circuit (one that has elements of inductive or capacitive reactance),the reactive power (kVAr) still has to be allowed for, even though it does no real work.
True power(kW), is the only component that does real work, this is dissipated in the resistive elements of the circuit.
Apparent power(kVA) is the product of RMS voltage and RMS Current, this is made up of both True and Reactive power.
Reduction of the reactive and Apparent power components, improves over-all power factor.
Just a note on the kVA rating of transformers, they are rated this way because the load that they supply, may have a variable power factor, depending up on what is connected to them.

Steve.

Again welcome to ECN, i do mainly commercial and industrial installation works, (up to 33kv if needed.

If you need any pointers, just post it on the site and we will endeavour to help you out.

Bye for now,

John H