Answer / naresh

in case of dc ,the frequency is always constant .
where as in case of ac ,the frequency is defined as number
of cycles per second.

it is given by

F=(1/T).

Answer / pillay

Frequency measuring instruments are available ,just connect
across the voltages and the frequency can be determined
instantly. whereas as the abbreviation means the DC HAS GOT
NO FREQUENCY.

Shall we use Dyn1 transformer in place of Dyn11 for motor application as a distribution transformer

1 Answers   NSL Sugars,

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what is the unit of current

12 Answers   RRB,

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how 650 volts creates? where is use?

0 Answers   DCL,

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what is reactive power?

2 Answers   Vestas,

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why solinoid coil used in tripping rely?and why not other type coil?

1 Answers  

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If a high resistance fault occurs,then what are the changes will happen in the system?

0 Answers  

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Why do we perform an open-circuit test and short-circuit test on the transformer?

0 Answers  

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How to design inductive load for 3 phase 440v and maximum 5 amps for star or delta? Can we use a 15kW, 1450rpm motor for 15kW, 960rpm apllication?If yes.how......n.if thesame motor used what`s it`s sideeefect.

0 Answers  

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if there is nutral in phase why we use earthing wire and grounding? even at fault condition the fault current flows to neutral (it is a lower path)

0 Answers  

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why exterrnal C.T. protection is used even though ACB& VCB is having inbuild C.T. protection?

2 Answers  

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Is it necessary to install Lighting Arrester on both side side (i.e HT and LT) of Transformer in a transmission substation? if yes Why on both side?

1 Answers  

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What do you mean by a current transformer?

0 Answers  

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