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Version 6.10
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Branch Circuit Load Calcs
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Efficiency Factor
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Ohm’s Law
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Power Factor Correction
Resistor Color Codes
Series Location Voltage Drop
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SI Units
Power Factor Correction

Maintaining a high power factor in a plant can yield direct savings. Some, such as reduced power bills and release of system capacity, are quite obvious; others, such as improved voltage and decreased I2R losses, are less obvious but nonetheless real, as are many indirect savings as a result of more efficient performance. 

The cost of improving the power factor in existing plants and of maintaining proper levels as load is added depends on the power-factor value selected and the equipment chosen to supply the compensating reactive power.

Adding capacitors generally is the most economical way to improve the plant power factor, especially in existing plants. Capacitors have several beneficial features, including relatively low cost, ease of installation, minimal maintenance requirements, very low losses, plus the fact that they are manufactured in a variety of sizes. Individual units also can be combined into suitable banks to obtain a large range of ratings. Thus, capacitors can be added in small or large units to meet existing operating requirements with additional units added only when necessary to meet increased future requirements.



Volts' power factor correction module features the ability to accurately calculate the required capacitance to alter the power factor to a desired value. This module is sensitive to Delta, Wye or single phase devices and rated or measured input values.

Also, once Volts has computed the required capacitor size to fulfill your requirements, you can enter the actual capacitor size that you will be supplying. Volts will then show the actual resulting power factor resulting from your actual capacitor size.

After the computations have been completed, an informative report can be generated in either print or PDF formats.

With a simply to use, easy entry, logical user interface Volts provides you with all the information needed to accurately compute power factor correction capacitors.


It simply cannot be any easier or more accurate to obtain the correct information the first time.


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Reprinted with permission from NFPA 70 2008, NEC® copyright© 2008, National Fire Protection Association. This is not the complete and official position of the NFPA on the referenced subject which is represented only by the standard in its entirety. The title National Electric Code® and the acronym NEC® are registered trademarks of the National Fire Protection Association (NFPA).

Volts is a registered trademark of Dolphins Software

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