0 Members and 2 Guests are viewing this topic.
In industry they are used for Power_factor correction.This is normally in cases where large electric motors are used and cause a large inductive loading on the supply. As the electricity companies don't fair well with having to deal with these phase-shifts, they charge the consumer for the trouble.Home installations are unlikely to have enough effects such as these to make it economically viable IMO.
PC is correct. As he points out it will only adjust the phase of the current in the supply which will reduce the power lost in the transmission system. It won't make any difference to the power consumed in the home.
Except, as I mentioned, if you run your lights at 110V rather than 120V, then you might save about 10% of the energy usage.
QuotePC is correct. As he points out it will only adjust the phase of the current in the supply which will reduce the power lost in the transmission system. It won't make any difference to the power consumed in the home. Geezer.The supply company charges you for your consumption of apparent power, not true power. They simply use VxI.
Johann,It's the other way around. Domestic electricity meters measure true power. A power company could hardly charge you for power you never consumed.
Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.
Electricity meters operate by continuously measuring the instantaneous voltage (volts) and current (amperes) and finding the product of these to give instantaneous electrical power (watts) which is then integrated against time to give energy used (joules, kilowatt-hours etc
It really is true power because sometimes the current and voltage are in opposite directions.
If you are selling real power back to the grid the current and voltage must still be in phase.
What's odd is that, whatever convention you choose, they swap places for part of the cycle if you have a reactive load.
BTW, I worked for the company that put the RF reading electronics in the GE electronic meter in the second photo in the Wikipedia article
You can count the mega watts they actually supply these wires with on your hand.
The power companies in most cases could not supply power to all their customers without those runs of wire, their length
...and the time it takes to bring those wires/capacitors up to voltage.
What is the OP here interpreting a 'capacitor' is though? It's not something a general consumer would be able to be concerned about nor could 'install' without a background in electronics.