Power Factor Formulas
Posted 29 March 2007 - 02:48 PM
I'm new here "GREATE FORUM"
Had 4 ?'s
1 In power factor formulas, why is everything in 1000's like Kvar, Kvolts etc. ?
2 What is the deference between a "Kvar" cap and a regular motor run cap ?
3 In the Capacitor Kvar formula, Is the Kvolts the cap rating ? or the power source ?
4 Where can I get a Kvar capacitor ?
Posted 29 March 2007 - 06:23 PM
Welcome to the forum.
Re your questions.
The voltage is usually in volts (not KVolts) and the current in amps, but usually the sizing is quite large and it is more convenient to consider KW and KVAR. - keeps the numbers smaller.
Power factor is only applied in industrial applications and motors are rated in KW or HP. motors rated in watts would not be corrected.
Motor RUN capacitors are single phase and applied to single phase motors only. Power factor correction capacitors are generally three phase but could be made up of three motor run cap-acitors although the rating and voltage would be low.
The voltage is the voltage of the supply, but I would check the KVolt part as most formula are for volts, not KVolts.
Most suppliers of motor control equipment can supply power factor correction capacitors.
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