how we select the mva rating of the circuit breakers?

1 Answers  

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Is C.T will sense the current in both direction. As i know the C.T will sense the current in only one direction.

2 Answers  

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why they charge more bill for low power factor rather than high power factor

2 Answers  

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What is state space method ? Why its used ? Can it applicable on linear, non-linear, 1st order, higher order, homogeneous, non-homogeneous, open-loop , closed loops , stable & unstable systems ?

0 Answers   Limton,

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what is spill current?

4 Answers   Adani, NPCIL,

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What is trickle charging system?

2 Answers   Absotherm,

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This is about the recent problem that we have faced in our project site. We have 6/7.5 MVA. 66/11kV three phase star - star power transformer. The neutral was solidly connected to the earthing mat. But because of high resistance of earthing mat (130 ohm on LV and 180 ohm on HV), one day LV side neutral earthing conductor melted and we had a huge damage. Can any one plz tell me what might happen when we connect power transformer neutral to the earthing mat which has high resistance (>100 ohm ) ?????

2 Answers  

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Hi,I am working in abroad for more than 3 years in a company operating with 11kv and 6.4 MW power. I need c licence in India,can I? some other says only i can get if i work for 2 years in india only! anybody kindly clarify by doubt.Thanks

0 Answers  

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Explain using drawings what is reverse PID action w.r.t PID controllers.

0 Answers   L&T,

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In generation,transmission and distribution voltage frequency is either 50HZ or 60 HZ;why are only these frequencies?

2 Answers  

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Explain RYB?

21 Answers  

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in HVDC transmission system ,monopolar link has one conductor usually a negative polarity and use ground or sea return ?through negative polarity we could pass electricity or not yes means how it is possible

1 Answers   Gyana, NNN,

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