Benefits of power factor correction

13/05/2011 by 3 Comments

Now around the world,hot topic is about energy saving and energy efficiency.The main item very popular for discussion is how to reduce electricity bills.

In industrial sector,the first step to reduce electricity bills is a power factor correction.This post i explain about the benefits of power factor correction for energy saving and efficiency.It also common practice for industrial.

I already discuss in my last post about power factor correction and capacitor sizing for power factor correction.If you understand the concept and how to calculated the capacitor sizing,you also can do it your self for power factor improvement. read more

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Capacitor sizing for power factor correction

09/05/2011 by 27 Comments

Commonly method for power factor correction using the capacitor to generate reactive power ( kVAR ) to reduce apparent power ( kVA ) form inductive load.

This time i want share a simple method to sizing our capacitor to improve power factor for induction motor and utility electricity.This method also can use for capacitor bank sizing.

Power factor correction is the one of famous topic for all electrical person at around the world.Many discussion and debate about how to sizing the capacitor for power factor correction.

How to sizing capacitor for power factor correction?

To properly sizing the amount of capacitor (kVAR) required to correct the lagging power factor,we  must have three (3)  important of information below: read more

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Power factor correction

08/05/2011 by 5 Comments

As with any electrical equipment,the works of efficiency usually determine from poor to excellent.How we measure the electrical efficiency?The answer is power factor.I discussed about how to sizing capacitor for  power factor correction on my last post.

Most of electrical motor or inductive equipment powered by two types of power.First is a working power.It measure in kilo watt (kW) unit.It mean this power is actually used to operated the electrical equipment.

Second is a reactive power.It mean inductive equipment need this power to  produced the necessary flux for the operation.The measurement is the kilovar ( kVAR ) unit.

So the working power (kW) and reactive power (kVAR) combined together to make up apparent power.It measure in kilo volt ampere (KVAR) unit.That is we call power factor correction. read more

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Single phase capacitor sizing

21/03/2011 by 60 Comments

When install a motor using capacitor for starting or running methods,we must sizing the rated of capacitor suitable with motor to get correct starting torque and avoid winding from overheating and can cause a damage.

This is basically a question of motor design.There is no straightforward regular relationship between capacitance and the motor size in kW.

When replacing these capacitors, the capacitance value and voltage should be taken from the manufacturer’s plate on the motor or from the old capacitor.This must be correct within ±5% and is sometimes stipulated down to a fraction of a μF.The choice of a running capacitor is even more limited than with a starting capacitor. read more

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Motor start and run capacitor

21/03/2011 by 9 Comments

Application of start and run capacitor for single phase motor.

Why we applied a capacitor for single phase induction motor?The reason is to improve performance of motor by generate the rotating field.Design for this motor have a two ( 2 ) stator winding,and one of it is the auxiliary and is connected by a suitable capacitor size.

The capacitor increases the starting torque and the full load power as the current flowing through the auxiliary winding, de-phased by the capacitor, creates a rotating field.The voltage across capacitor usually higher than the mains supply.

The choice of the capacitance is usually empirically made on the motor. This is because of shuttle differences between motor manufacturers.As the torque and the power of the motor also depends on the reactive power of the capacitor. read more

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Single phase capacitor

20/03/2011 by 1 Comment

Firstly let me describe about what is capacitor?This device is very common used in electronic and electric application.The main function is to stored and release electricity charge.

It charge and release depend on frequency ( Hz ) of our power supply.Normally around 50 until 60 times per second in alternating current system.

The construction of capacitor basically made from wound layers of metalized polypropylene (dielectric).The element is sealing in a plastic can with a suitable sealing material.

We can see a two metal plates insulated from each others.For oil filled type,it use a PCB`s as a coolant agent,but now almost capacitor is dry type. read more

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