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Assalm-o-aalaikum

dear sir

          i am the student of (DAE) in electrical technology from swedish institute of technology rawalpindi.i wants to appentieship tranning in your organization.i shall be very thankful to you.

[admin]

but 3 phase is so complicated………..

[admin]

I will encourage you to use a three phase, it is much better.

[admin]

Capacitor is used 2 improve power factor

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suhail said:

1. basic working principle of capacitor z dc current or ac curret????????????

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When it get charged and discharged? How it is happening?

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i dont think u (not even a pass out electrical engineer) could understand the circuit of “any” electronic device completely!!!

first of all specify wich electronic device……

u want to modify it to serve the same purpose or different??

[admin]

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Follow link..u will get ur answer
 

http://www.allaboutcircuits.co….._11/4.html

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hi,

generally Power=Voltage*current*power factor

if you known V and I then you can find the P.F from the above formaula…

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David Knight said:

Hi all

 

Please can someone help me, i am trying to calc the PF factor of my heavyduty machines.

 

I know the voltage and the amps but how do i calc the PF factor??

 

Please help its driving me made

power output=VxIxCOS@… cos@ is the powerfactor

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[admin]

I woulI would rather recommend you to buy a transformer than making it. The cost to incur is more when you try to assemble one and this excludes the errors that you might encounter during the test.

[admin]

The CT ratio (300/5) you are using is too big for your actual power consumption.

[admin]

Jim Johnson said:

Thanks for the compliment. The subject is not simple – it gets tough to make it simple.

A PF capacitor when placed in an electrical system has a resonant frequency based upon the inductance of the electrical system (from any point) and the capacitance of the PF capacitors. The PF capacitors are installed parallel to the loads. Adding a reactor in the parallel portion of the circuit in series with the capacitors modifies the frequency of the PF capacitor bank and thus the resonant frequency of the PF capacitor bank in the electrical system. This is 'detuning.'

PF capacitors will interact with all frequencies present in the electrical system. When harmonics are present this is harmfull to the capacitors. The harmonic currents will overheat the PF capacitors to shorten its life or trip its thermal safety devices. Detuning can be designed to 'block' most of the harmonic currents or can be designed to permit the current of one harmonic frequency to flow into the capacitors. The 'blocking' design is considered 'detuned' within the industry. The design that permits a harmonic order to flow into the capacitors is called a 'tuned' capacitor or a harmonic filter.

Detuned and tuned capacitor systems are typically of two application philosophies. One is an electrical system solution where one large bank is used for a group of loads or used at the utility connection. Local and worldwide suppliers of these exist. However, a harmonic study is required for these types of solutions. Be sure the company chosen can provide this before equipment is purchased.

The second philosophy is to place a small tuned capacitor system at each nonlinear load to provide harmonic suppression for the electrical system. To be sure that these small tuned banks do not interact with each other (when more than one is installed) or overload due the presence of other sources of harmonics, a series reactor on the source side of the filter section is required. The series reactor is sized for the full load current of the nonlinear load on which applied.

The tuned filter also provides leading reactive current that must be evaluated within the system to determine if problems may occur due to excessive leading PF. The manufacturers of these type of filters tend to be localized operations within individual conutries. They exists in many countries.

The result of properly applying either device will relieve the utility of conducting VARs and specific harmonics and permit green generation technologies to be more easily employed.

Regards

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wull i want to know one thing that i am choosing my final year project
on design an fabrication of power factor improvement pannel, well after
reading these all topics i am confused that , in this pannel which is
basically for industries, should i use harmonic filters also or not? and
one important thing what change can i bring in my project?

[admin]

wull i want to know one thing that i am choosing my final year project on design an fabrication of power factor improvement pannel, well after reading these all topics i am confused that , in this pannel which is basically for industries, should i use harmonic filters also or not? and one important thing what change can i bring in my project?

[admin]

Laurent said:

Hello,
 

I used Caneco in a previous job, and I was not aware it was possible to place LV Genset anywhere in teh network

==> is it a new functionality?

==> if not, do you have a demo available somewhere which shows this functionality?

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Hello Laurent,

LV Genset source supply can be placed anywhere in the network since Caneco BT 4.4 version (2002).
Since Caneco BT 5.1.6 (2006), this genset can supply several boards in various point of the network.

In order to select connexion point for a board, just use Supplies / Standby connection menu as shown in this screen-shot:

 

I keep at disposal for any further information.

Laurent Berthelin
ALPI Sales Manager (Caneco BT software editor)

contact@alpi.fr

http://www.caneco.eu

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capacitor using power factor

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