iam interesting to design the control panel for 3 phase pump motors by controling single phase switches.iam plan to use fuse,contactor & relay for motor protection .how can i select the voltage & amps rating for fuse,contactor & relay plz guide me .if anybody clarify my doubt means it will more helpful for my future .

1 Answers  

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how current is reverse from its normal direction during the fault?

0 Answers   HGF,

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If load is 240 kw & pf is 0.8 lagging, than how to increase it from0.8 to 1.0(unit),which rating capacitor used, please give me Calculation. What is effact of consumer & suplier if pf is lagging or leading with on effect machines/ TF/GE etc.

6 Answers   L&T,

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What current can be carried by 25 sqmm copper cable safely?

6 Answers   Bharti,

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If the positive terminal of batteries in 125 v dc system is connected to earth what will happen ?

4 Answers  

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what is the mazor difference between the induction transformer and synchonous motor?what is the similarity between them?

1 Answers  

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can u describe the method used for protection of transmission line.

0 Answers   IBM,

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Hi,iam a diploma in electrical engineering.rtd from indian air force in apr 2007.prsently working in reliance next link as a network maintenance engineer since 2007,can i get a job in motherson sumi.

0 Answers   Motherson, Motherson Molds and Diecasting Ltd.,

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How can find thermal state value in relay for calculate thermal overload.

0 Answers  

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Dear All we are having a problem in G120 BOP showing alarm A0503, F0052, F0060 we can not remove fault alarm ,Please any body help us. kowsar

0 Answers   TCCL,

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I want to know the principle of rotating flux transformer.

1 Answers  

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what is magnetizing current test in power transformer

0 Answers   ABB,

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