What is VVVF Drive ?

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What is the difference between earth fault and restricted earth fault protection?

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Write a note on Treatment for electric shock.

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Which capacitor is used in ceiling fans ?

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why 5kW motor becomes unbalance if its relay trip 1st time and its set value is 7.0 A

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when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

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What we mean by vintage of an engine+Generator?

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CAN WE CALCULATE THE NEGATIVE SEQUENCE AND ZERO SEQUENCE REACTANCE OF A GENERATOR USING ONLY ITS RATED VOLTAGE, KW, PF AND SYNCHRONOUS REACTANCE??? IF YES, THEN HOW??

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What is the Different Between Breaker and One and half breaker.

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Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

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what is the RESTART INHIBIT protection?

1 Answers   Thermax,

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What are the typical values of characteristic impedences of overhead line and underground cabel? Why there is so much variation?

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