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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Two alternators say 1 & 2 are poised to parallel operation. But at the time of paralleing alternator 2 gets out of the system by tripping Earth fault relay. Please send me reply why this is happening?

2 Answers  

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what is the meaning of harmonic in AC waves and when which are prduce and what is the effects on line and give any other information about harmonics

1 Answers  

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if voltage is not builed up in small generator what will be the reason?

7 Answers   century,

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What is the difference between switch gear and control gear ?

2 Answers   QU,

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what is difference between 2 pole structure and 4 pole structure in transformer yard

0 Answers   Hospira,

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i need 24v dc from 230v ac supply how we can getit ? what are the devices &its rating requied for that ? plzz i need answer urgently .thank u

3 Answers  

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in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

0 Answers  

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71ohm,111ohm,95ohm,179ohm in calculate the total ohm in series circuit

0 Answers   Machino,

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why in a swquence network representation, the negetive sequence generated voltage is taken as zero?

0 Answers  

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For 160kw motor what size of cable and material is needed.?

1 Answers  

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Why does the power consumed is always constant even if a fan speed is altered?

5 Answers  

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