Answer / thowsif_emerson_csm team

Hi Sorry Ramya,

Wrong Answer...

Answer / thowsif_emerson_csm team

Hi,

Pls find the bellow link,

http://en.wikipedia.org/wiki/Variable-frequency_drive

Answer / thowsif_emerson_csm team

When the need arises to correct for poor power factor in an
AC power system, you probably won't have the luxury of
knowing the load's exact inductance in henrys to use for
your calculations. You may be fortunate enough to have an
instrument called a power factor meter to tell you what the
power factor is (a number between 0 and 1), and the
apparent power (which can be figured by taking a voltmeter
reading in volts and multiplying by an ammeter reading in
amps). In less favorable circumstances you may have to use
an oscilloscope to compare voltage and current waveforms,
measuring phase shift in degrees and calculating power
factor by the cosine of that phase shift.


Hi more details Pls go through the following links:-



http://www.elec-toolbox.com/usefulinfo/pfcorrection.htm

http://www.pfc-engineering.com/

Answer / ramya

thnx thowsif ur answer is vry useful 4 me

Answer / thowsif_emerson_csm team

Welcome.........

Answer / ramya

thnx thowsif r u replyng fast & efficient .keep it up

Answer / ajay kumar

There are various method to improve power factor. but main
mathod is to connected capacitor bank. we can calculate the
capacity of capacitor by this formula

KVAr = KW (tan1 -tan 2)

Answer / vinod rana

1 . bank of capacitor used
2. induction motor use

Answer / vinamra

if our load is inductive then with using the capacitor we
can improve the pf but if our load is capacitive then
connecting the capacitor our pf will be more poor.means if
pf is lagging then capacitor improve our pf.

Answer / thowsif_emerson_csm team

Hi Ramaya,

To Calc. the required KVAR for desired load to improve the
Power Factor,

Pls find the following link which contains the Calc. Table:

http://www.nepsi.com/kvars_required_calculation.htm

what are the protection equipments used betbeen HT line and transformer in a power plant

4 Answers  

why dont we connect the two 12 V DC batteries in parallel, for an inverter (UPS)? is there any harm ?

6 Answers  

why ohmas low not sutable to transformer.

1 Answers  

what is the formula for calculate the turns in Transformers

2 Answers  

what curve and rateing would you use for a three phase 0.75kw motor?

0 Answers  

if i have one capacitor=80 micro farad which correct the unity power factor,but i want to make capacitor bank who correct the power factor.so,how to split this capacitance value?

2 Answers  

what is the mazor difference between the induction transformer and synchonous motor?what is the similarity between them?

1 Answers  

What is conventional thermal current (Ith)

0 Answers   Alstom, HPL,

WHERE CAN I GET THE PREVIOUS QUESTION PAPERS OF Govt Polytechnic in deee 2nd year papers

0 Answers  

what is the difference between KW and KVA?

15 Answers  

what is the use of vector group in transformer. means what r the application of various vector groups?

5 Answers  

we want to feed 3 phase supply to 70 ton AC load.what will be the size of (3 phase)cable require.

2 Answers   BSES,