Answer / niyas

Changing magnetic field causes to produce eddy currents
that are confind within the core of transformer. these are
like circulating whirls inside the core. these can be
eliminated by making the core of thin layers.
"Eddy current losses occur whenever the core material is
electrically conductive. Most ferromagnetic materials
contain iron: a metal that has fairly low resistivity
(roughly 10-7 Ω m). The problem is intuitively obvious if
you consider that the magnetic field is contained within
a 'circuit' or loop formed by the periphery of the core in
the same way as it is contained within a turn on the
windings. Around that periphery a current will be induced
in the same way as it is in an ordinary turn which is
shorted at its ends"

what is PDU in transformer?? which company manufacture??

0 Answers  

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I have a shop heater with a 1/3 hp capacitor start, induction motor driving the fan. Intermittently, the fan motor speeds up significantly for several seconds (15-60 sec) then slows to normal operating speed. The manufacturer suggested changing the capacitor which made no sense, but I did it to no avail. Could this possibly be caused by the centrifugal switch intermittently reconnecting the start winding?

1 Answers  

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what is the different bitween ETP & WTP

1 Answers   Square Pharma,

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What is the power factor of a transformer at no load?

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how DC is differ from AC ? what are the difference between them ?exept (P-N)&(+__-)

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How out of step protection relay works?

0 Answers   APL,

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1 Answers   Brigade,

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Difference between copper earthing & aluminium earthing?

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In three phase supply why we use R Y B Colour not other.

4 Answers  

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1)how many types of earth? 2)how many types of megger and how to select that range? how much time taken for megger calibration( we r using megger)

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Insulater disk using formula for 33/66/135 line h t line

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In a house wiring why we are using only one neutral wire and so many phase wires from the main board, when the load is common for both wires?

3 Answers  

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