Answer / 3nath

for efficient operation we have to maintain unity power factor(1) but it is possible only for resistive loads
that's why in EB lines trys to maintain approximately 1 that is 0.99 to decrease the losses. capacitor bank used to POWER FACTOR correction

Answer / vicky

Generally capacitors are used to improve power factors in inductive loads... Inductive load will reduce the current phase with voltage.. so lagging power factor is obtained.. in order to recover that, capacitance is provided which will reduce the voltage phase with current..so the pf remains almost near to 1(not exactly one)...

Answer / perambalur sakthivel

(1)the cosine angle between voltage and current is called
power factor ,

already we know very well about cos value

cas 0= 1

(2)whenever the cosine angle between voltage and current
zero time a full power is utilized / consumed

but power factor lagging time a full power is not
utilized/consumed

(3)so we are maintained in power factor in unity




(4) to regulate voltage in power system we are used in
capacitor bank used(vanthni@yahoo.com)

Answer / hkrish.eee

iron loss readused

What is the use of core in the transformer?

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selection of conductor in different voltage?

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Any one can explaination about calibration with rotating sub standards?

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which type of capacitor store high amount of energy for long time ? ( polarized or unpolarized )

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What about Reactive power.and role of that one?

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in transmission line, if the load is suddenly increased at the receiving end of the system the phase shift will (a)decrease (b)becomems zero (c)increase (d)not be affected

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what are the stresses in circuit breakers ?

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why we use 25 kv in railway .not 11kv, or 33 kv

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At site, we have 30Kw motor (3 phase, 400V,50Hz) and FLC 54A as per the nameplate. At the time of starting it draws 840A instead of 390A (7.2%). As per the data sheet also its 390A starting current. it thru a dol starter from the MCC. can anyone tell what is the problem in the motor

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How much depth n width required for laying of 1X70 Sqmm Cable in Desert???

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