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ham77		 decrease PF with enterance of capacitor bank View All
dear sir

I have problem in my factory

almost loads are dc motor control by eurotherm 590+ drive
we have two transformer 1 MVA , 1.5 MVA
1-The PF in 1 MKVA with load reach .85 although there is
some capacitor bank not enter yet ,If I try contact more capacitor by manual
the PF decrease than .8 .
2- another big problem in 1.5 MVA , The PF not change
with enterance capacitor bank but some time decrease.
the PF reach .45

please support me , THANKS
13 years ago - 1 week left to answer. - 3 responses - Report Abuse
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Niel
 Why do you want to decrease the power factor of your system? Reducing the power factor will reduce the efficiency of your power utilization [1]. By increasing your power factor you will reduce your energy costs [2].

Niel Leon
engineering.com

13 years ago

Source: [1] http://en.wikipedia.org/wiki/Power_factor

[2] http://www.galco.com/circuit/harmon.htm


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ham77
ASKED BY 		Please read the details 1 , 2 of my problem and reply me
(I want to increase PF but I can't ).

13 years ago

Source:


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Niel
 Sorry, I misunderstood. Thank you for the clarification.

If you are using DC drive systems simply adding a capacitor bank may not be the solution. Here is an article which should provide you some guidance [1].

Have you contact eurotherm [2] for recommendations?

They have a white paper on the subject [3]

Niel

13 years ago

Source: http://www.pqsoft.com/Power_Factor_Correction_and_Harmonic_Control_for_dc_Drive_Loads.pdf

http://www.eurotherm.com/

http://www.eurotherm.com/news/press-release/eurotherm-publishes-white-paper-on-improving-power-factor-using-epower-automatic-load-tap-changer/?locale=en_US


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