WHAT IS MEANT BY OVER EXCITATION IN GENERATOR TRANSFORMERS? DESCRIBE IT.

0 Answers  

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WHY IS THE EARTH FAULT CURRENT ALWAYS LESS THAN THE NORMAL CURRENT??

0 Answers   Teil,

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In DC current-excitation to transformer, why it sucks more current? Eventhough there is no power transfer between primary and secondary? R is very low so it should suck less current only na thn y its current increases?

2 Answers   Cairn,

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1.what is mean by 8/20 micro sec waveshape

0 Answers   Vedant,

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explain working principle of earth leakage relay

0 Answers   Divis Laboratories, SMIORE,

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Can anyone explain me the operating principle of the megger tester?( I just know that its diflection relates with the ratio of currents of control & diflecting coil. I need more information as breif as possible)

1 Answers   TCS,

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what is the function of commutator in dc motor?

52 Answers   Aviation, HP, Raj Construction, TCE, University Exams,

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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 working principle of soft-starter & how it diff. from VFD ?????????

5 Answers   L&T,

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What is the most essential condition for the voltage build up for a d.c. Shunt generator?

0 Answers  

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what are the specifications we must look at to select a relay for any capacity motor?

0 Answers  

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what is mathematical relation between ac to dc current how will convert Iac=50amp to Idc

7 Answers  

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