why the voltage level is changed when the unearth cable is earth

2 Answers  

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What is shunt voltage and u v voltage witch one best

0 Answers   SEL,

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How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f used in Canada is to be operated on 50 hz in Europe frequency then how will its KVA rating change? a-increase b-decrease c-remains same

1 Answers  

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why T/F winding temp measurement cts are odd secondary current ie,109A/1.2A/1.4A?

0 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

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a transformer can have zero voltage regulation a)o pf b)1 pf c)lagg pf d)lead pf

2 Answers   SJVN,

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As per principle we say in three phase supply ,the voltage is producing by phase angle between two phase so two phase is needed means then why we using three phase ?

2 Answers  

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If induction motor load is incresed motor speed decrases.But in syncronous motor load incrases speed canstant why?

5 Answers  

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I have doubt that the supply HZ (very low or high than rated ) may affect the power factor. is it true. ?

0 Answers  

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Which has more losses, AC or DC??

4 Answers   Infosys, TATA,

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types of transformer ?

3 Answers   CG, JLL,

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WITCH CARDS IN USE IN FIRE CONTROL PANEL.

0 Answers  

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In chillers & freezers which gas will be use?

3 Answers  

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