How to apply 'c' license and also explain what is difference between 'c' and 'b'license.i am also working in one of the private company.i have finished my diploma in 2014 .i have already finished in ITI electrician course.....

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In the UVR(Under Voltage Relay) there is a knob for the hysteresis setting. what is this setting? its threshold is given from 5% to 50%. please help me....

2 Answers  

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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

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1.what is the reason for transformer and lightning arrester blast in 33kv system

0 Answers   ABB,

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how dia of wire and angles are calculated for overhead shielding wire to protect substation equipment from lightening strokes???

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why we test the core balance of the transformer?

1 Answers   Siemens,

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why full load voltage is less than no load voltage?

4 Answers  

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What is mean by sink and source in term of PLC and drives,where and how they used in logic

2 Answers  

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Anyone who can recommend an equivalent to Envirotemp FR3 of Cooper?

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Is it true that in the 3 phase transformer, the limbs of the core are at 45 dgrees to each other. if true, why?

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how to measure winding resistance of single phase motor?

1 Answers   Adani, Dodsal,

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difference between moore and mealy model

2 Answers   Google, IBM, TCS,

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