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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To avoid arcing what we connect in earthing.

4 Answers   HAL,

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What do you mean by power transformer?

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what is the resistance value of earthing pit and why they are connected?

6 Answers  

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IT IS SAID THAT THE OLTC OPERATION SHOULD NOT BE PERFORMED WHEN THE TRANSFORMER IS GENERATION TRANSFOREMR/STEP UP MODE. WHY IS IT SO?

1 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

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what happen when increase or decrease size of lamp,light.glass.

0 Answers  

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why do select 11000v rubber mat even we use only 415Volts

1 Answers   Saint Gobain, Tata Steel Limited,

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In a generator (Synchronous) does the rotor speed (frequency) corresponds to the speed of the water (in hydro). does the torque on the turbine relate to the flow of water?

2 Answers  

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What will be the excat cable specification in Sq MM...please find the details below.... Induction Motor HP:55 Amps:70(starting Amps),45(Running Amps). Volts:415

1 Answers  

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If you have an earth with pilecap then your resistance is really low. why and how?

0 Answers  

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I want to know the currect formula for industrial lighting lux caluculation & light fittings selection

2 Answers   MRF,

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Difference between online and offline UPS?

11 Answers  

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