integral power factor correction
- Thread starter kevinb
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Re: integral power factor correction
The word ?integral? confuses me here. Could the phrase mean a component that (1) Performs power factor correction, and that (2) Is integral (i.e., a part of) the power system? If this is what it means, what part are you asking about? The part about being integral with the power system, or the part about performing power factor correction?
The word ?integral? confuses me here. Could the phrase mean a component that (1) Performs power factor correction, and that (2) Is integral (i.e., a part of) the power system? If this is what it means, what part are you asking about? The part about being integral with the power system, or the part about performing power factor correction?
Ed MacLaren
Senior Member
Re: integral power factor correction
Most fluorescent, and some HID, ballasts have "integral" power factor correction. The capacitor is built into the ballast.
I think some UPS units have built-in power factor correction as well.
Were you asking what is meant by power factor correction?
Ed
[ July 15, 2003, 07:00 PM: Message edited by: Ed MacLaren ]
Most fluorescent, and some HID, ballasts have "integral" power factor correction. The capacitor is built into the ballast.
I think some UPS units have built-in power factor correction as well.
Were you asking what is meant by power factor correction?
Ed
[ July 15, 2003, 07:00 PM: Message edited by: Ed MacLaren ]
Re: integral power factor correction
I think they are asking for power factor correction capacitors with each motor load. Take a look at NEC article 460 on capacitors. The handbook has a drawing and photo of common ways this is done. The IEEE red book gives some good information on this topic also. By adding the capacitor at the motor, the lagging power factor of the motor can be partially cancelled by the capacitor. This helps prevent the power factor from going leading when the motors are shut down, the capacitors are offline too. Capacitor vendors have a chart showing maximum size of capacitor recommended for a given horsepower motor.
I think they are asking for power factor correction capacitors with each motor load. Take a look at NEC article 460 on capacitors. The handbook has a drawing and photo of common ways this is done. The IEEE red book gives some good information on this topic also. By adding the capacitor at the motor, the lagging power factor of the motor can be partially cancelled by the capacitor. This helps prevent the power factor from going leading when the motors are shut down, the capacitors are offline too. Capacitor vendors have a chart showing maximum size of capacitor recommended for a given horsepower motor.
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