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Auxiliary relay used for standby protection of electrical circuit when main relay fails to operate.
PLA relay used for feedback purpose.its work like a NO NC .

what is the formula for 3 phase motor starting cureent deatials 3phase 148A delta 415v, efficiancy 94% can we run the motor with 200A incoming supply

2 Answers  

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Why USe In -48 DC Volt !

3 Answers  

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In our domestic single phase line if you don't have a ground connection (earthing)how will you separately use earth in a specific power supply board.

1 Answers  

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Difference between UPS and Inverter?

7 Answers   HCL,

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The capacitive reactance of a capacitor of 1/(2(PI)) F at 10^3 H is

0 Answers  

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what is earthing

1 Answers  

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resistance of transformer oil=?

1 Answers   HCL,

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USE OF 8 WAY PAN ASSEMBLY

0 Answers   TCS,

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What is the advantage and disadvantage of dry type transformer?

5 Answers   Bhel,

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for 100 HP Induction motor service factor is 1.2(SF) we placed a VFD at the motor side load is balance with 0.3 Amp's Phase to Phase but at incoming of VFD load is un-balance with 10 to 20 Amp's what will be cause of load un balance

0 Answers  

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What is the meaning of 'A synchronous motor floating on line'?

2 Answers  

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why the earth conductor in top of the tranmission line ?

2 Answers  

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