Answer / b sumanth kumar

Due to the property of residual magnetism.According to
residual magnetism property when motor is turned off then
the magnetism property of the poles do not lost some what
of the magnetic property will be present by this motor can
produce its back emf at the time of starting

Why substation battery room is coulered black?

1 Answers  

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If the secondary winding will be open in current transformer, how to damage the insulators

2 Answers   TPDDL,

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what type of oil is used in transformers? a)conduting b) insulating

25 Answers   ABB, LGS,

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what is method for testing CT

0 Answers   DCM,

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why do motors burn out? I understand why adding parallel loads to a power source means more current moves through the circuit, and can destroy circuit elements by overheating. What about when you have a vaccuum cleaner intake flush against a floor, a room fan sitting directly against a wall, or a power drill trying to drill through something too hard?

0 Answers  

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MCCB 400 Amps 50KA 430Volt AC What is mean by 50KA

16 Answers  

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Why we Specify Transformer rating 433 V Instead of 415V ?

8 Answers   ABB, ERA, Uddans,

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What is the difference between a Root Locus plot and a Bode plot?

0 Answers   GE,

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What conditions are required for transformer to operate at low frequencies ?

0 Answers  

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what is the reason for earthing static equipments? why?

3 Answers  

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how do u calculate CT rating for 10 mva transformer

2 Answers   Enercon,

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pls tell about gas insulated substation?which gas is used for that substation?above which rating we are used this substation?how we take maintenance in that substation?it means substation fully shutdown or live condition?if live condition means how?pls clear this things

1 Answers   Essar,

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