Answer / guest

over current-a)instantaneous, idld,thermal earth fault,
under votage.

Answer / romeo

in addition, differential relays for current and voltage
are necessities also to monitor considerable leakage of
current and difference in voltage (in case of two leg
switchgear for a make and break design) to a magnitude that
will activate tripping action or prevent closing of the bus
tie.

IN star -delta motors normally first operated in star mode {absulated given (r-y-b) phases after one miute change in delta mode in this case i am change phase sequience for example R -PHASE TO CHANGE Y-PHASE ;Y-PHASE TO CHANGE R-PHASE SO THIS TIME MOTOR WILL HAPPEN RUNNIG MODE EIGHTER(OR) STOP MODE(TRIP MODE)

6 Answers   MacLellan,

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Is MEN and RCD related to each other ?? IF yes then how??

0 Answers  

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power 148kw i need exat cable size in 148 kw in 3phase what size of cable can i used.

3 Answers  

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Which machine u will prefer to use at where flameble gases are comming out & why?

1 Answers   NTPC,

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What is transient Phenomenon?

0 Answers  

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How is Grounding or Earthing achieved in Planes and Automobiles?

3 Answers   ABC,

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Differentiate between low pass, high pass and band pass filter?

0 Answers  

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Can u tell me the name of books of transformer testing?

6 Answers  

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Whats the difference between three phase and single phase?

4 Answers  

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Why star delta starter is preferred with induction motor?

0 Answers  

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what's the thickness of 1.5sqmm wire

1 Answers   Bhel,

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what r the preventive maintenance of air compressor

1 Answers   Jindal,

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