What is mean by sink and source in term of PLC and drives,where and how they used in logic

2 Answers  

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what is the purpose of commutator in DC motor?

3 Answers  

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when the direction of a 3phase induction motor is reversed , is there any losses increases?

5 Answers   IOCL,

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1.How to calculate backup time from series connected battery of 12v dc with 26Ah for 2battery?

3 Answers  

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what the purpose of transmited high voltage in over head lines

3 Answers   NCC,

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Draw a SLD for main panel for school having connected load of 1200kw and emergency generator 200kw.also show the increase of additional load of chiller 225kw in the lv panel indicating meter postion size of transformer ,cables and capacitor bank.

0 Answers  

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Whats the purpose of neutral earthing?

5 Answers   Electrical, Hindalco, TCS,

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what is the function of rccb how it diffrentiate between elcb

1 Answers  

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what happens if we earth negative electrode of an rectifier transformer used in ESP. In which normaly positive is earthd from inside the xmer.

1 Answers  

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1 kva how much amps? How to calculate ?

2 Answers   L&T,

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Why does the Solid state Rectifiers for 3-ph brake motors sometimes have 2 & sometimes 3 output terminals?

0 Answers  

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how much distance is required for earth pit to earth pit in substation???

3 Answers   Divis Laboratories,

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