Answer / vishnu

v^2 according to this relation as the voltage changes
transformer core loss changes

In dc motor starter there is less voltage required for holding contactor that's may why it is called no volt coil. but in ac starter why holding contactor is called no volt coil.

2 Answers   JSW,

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sir what is the purpose of SF6 in HT breaker and what is the pressure should be maintain in the breaker?

2 Answers   Kirloskar,

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why ELCB's are not useful for operation theater equipments ?

4 Answers   Reliance,

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For 35 HP motor how much amount of capacitor should be on in kvr to reduce the current bill

1 Answers  

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What is P.F? Formula for calculating PF in HT side?

1 Answers  

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What is the important parts of SF6?

2 Answers  

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0.5,1,1.5,2.5,4.0.6.0,10,16 square mm electrical wires how much take maximum current in 50htz

0 Answers   SoftLogic,

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What is BusBar integrity test and how it is conducted?

0 Answers  

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friends., why celling fan rotate cockwise direction and wall fan anticickwise direction ?

3 Answers  

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length of 4 core cable 95mm from substation LV VFD panel to Motor at field approximately 150 meter. Motor stop and power has been isolated from LV MCC ( Substation )to disconnect Motor for services. After Motor completed service propose to reinstall and reconnect Motor Cable, found earth cable sparkling during touching at metal / motor body. Inspect by clamp meter found earth cable have current flow AC 1-2amps and all earth cable at MCC LV also have current flow as same value. why it is happen?

2 Answers  

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What do you mean by reach and reach the point of the relay?

0 Answers  

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current transformer cannot measure voltage or not ? then y we use P.T ?

1 Answers   Bhel,

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