Answer / faizan

For cable selection we need supply voltage,load current and distence between source to load end ,then we can choose the size of cable and also it depends on meterial of cable,( cu/alu )..

Answer / pratap

70 ton=245280watt
I=245280/1.73x440x.8
 
  =402 Amp
cable size 400sq.mm(3 phase +neutral)

difference b/w eath and neutral

10 Answers   ABB,

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how wud i know that whether i have to use unitized package substation or transformer?

1 Answers  

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How to do maintenance of transformer feeder.

0 Answers   KSEB, L&T, Siemens,

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can i able to get bhel previous exam question paper?

0 Answers   Bhel,

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what is the difference between induction and synchronous motor?explain in simple words?why 3 phase motor is given preference over single phase motor.

10 Answers  

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I have made a 3 phase thyristor full bridge rectifier. But at the moment it is working only for the half bridge operation. Both the half bridges are on operation separately but when i put it into full bridge operation the oscilloscope output is zero. I rechecked that the pulses are correct for each thyristor. what could be the possible reason for this?

0 Answers  

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For a load of 40HP induction motor.what will be size of Armoured copper cable require to connect the motor to starter in Star-Delta?

1 Answers   CG,

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i work as a technician at a private company.. i used to take amp reading for certain appliances such as air con.. the problem is when i clamp the neutral, wire there is a current reading.. from my understanding for single phase system neutral should not have current unless if the circuit is not complete.. yet the air con still work

3 Answers  

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What are differences between Voltage, EMF & Potential difference ?

0 Answers  

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if the rotor of induction motor is purely inductive then what is the electromagnatic torque.........

1 Answers  

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What is the difference b/w earthing & grounding?

6 Answers  

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what is the minimum recommended leakage current of an earthed cable connected to the body or skid of an alternator

0 Answers  

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