how to find insulation resistance of a motor(415v) by theoretical formula??

2 Answers  

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Can anybody tell the formula to calculate temparature rise in the cable with respect to current?

1 Answers  

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if transmission voltage expressed as the multipple of form factor(1.11)........11,33,66,220 etc......then why madakkathara substation(kerala) voltage is 400kv..not 440.....?

2 Answers   KSEB,

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how to differentiate a mpcb,mcb with a contactor? Explain their working operation

0 Answers   L&T,

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What is the starting current of a motor?

3 Answers  

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why phase to phase voltage are 290 rather then 440?

1 Answers   Bosch,

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What is the function of induction motor when low voltage is apply.

6 Answers  

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what will happen when square wave is fed into input side of 3kva transformer and what you will get on output side.

3 Answers   Blue Star,

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my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

1 Answers  

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Pleasd Tell Me..... In Generating Stations Why The Generation Of ELECTRICITY Is In 3 Phase Form?? OR In Generating Station Why We Generates The ELECTRICITY In The 3 Phase?? Why Not In The 4 Phase, 5 Phase Or 6 Phase Form??

3 Answers  

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a 50hz motor to give 60hz whats happening in motor.what happen the motor.

6 Answers  

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what is difference between delta-delta,delta-star transformers ???

3 Answers  

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