Calmanual
How to Apply Capacitors to Low Voltage Power Systems
Power Factor
Understanding Power Factor
Improving Power Factor
Advantages of Maintaining a High Power Factor
Elimination of Penalty Dollars
Additional Capacity in Electrical System
Reduction of I2R Losses
How to Determine Amount of KVAR Required
Analysis of Utility Bills
Location of Required Capacitors
Method #1
Capacitor at Load
Method #2
Fixed Capacitor Bank
Method #3
Automatic Capacitor Bank
Method #4
Combination of Methods
Harmonic Distortion Problems
Harmonic Distortion
Engineering Data
Definitions
Basic Relations

Power Factor Correction Application Guide

LOCATION OF REQUIRED CAPACITORS

METHOD #3: AUTOMATIC CAPACITOR BANK
Install an automatically controlled capacitor bank (Autocapacibank™ brand capacitor) that will closely maintain a pre-selected value of power factor. This is accomplished by having a controller switch steps of KVAR on, or off, as needed. This type of bank eliminates the concern of having too much KVAR energized at light load periods.

This method would seem to have much appeal, but it also has a real disadvantage. Since it is usually located near the incoming service entrance switchboard, we find that like the fixed bank this automatic bank does nothing to reduce the conductor losses (and this billed KW-Hrs). Remember that the reduction in conductor losses using Calmount® brand capacitor can be sizeable.

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Calmanual - Power Factor Correction Application Guide
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