Answer / tushar choudhuri

Rated interrupting time is the mean time for interruption of any current exceeding the rated interrupting current of the Breaker.The possible relaying time of modern high speed protection is 0.5 to 1,0 cycle.The breaker interrupting time of high speed modern circuit breaker is nearly 2 to 3 cycles.

why do we prefer -48 volt instead of -24volt or -12 volt etc. ??

1 Answers  

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Why Diffrential and Ref relays are used together although Diffrential relay can protect Pri and Sec of Transformer

1 Answers   Qatar Gas,

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why the frequency and voltage in india is 230v and 50HZ. when compared to USA say 110v and 60 HZ.

0 Answers   Alstom,

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How grounding is different than earthings?

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what happen for input voltage output voltage input current output current and kva if we increase primery winding in transformer?

1 Answers  

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What is auto transformer?

7 Answers   L&T,

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Is it required to use Automatic transfer Switch in L&T panel board if we use AMF panel with DG set? How the single line diagram will be? Please forward the material to sreenu_207@yahoo.co.in

0 Answers   HAL,

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Why we have short circuit the secondary of the transformer

1 Answers  

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In power transformer YnD0 Vector Group is possible or not? if possible, what will be the vector diagram and what are the conditions?

2 Answers  

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what is subtransient , transient and steady stateac components

0 Answers  

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WHAT IS A DIFFERENCE BETWEEN A DC GEAR MOTOR AND STEPPER MOTOR.AND WHICH IS MORE APPROPRIATE TO USE FOR POSITION CONTROL PURPOSE?

1 Answers  

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In 110V DC supply,if a closed circuit gets open, How can we identify the voltage which is measured after the resistor(4KOhm) which is open with negative.it shows 55V +ve when measured, also the actual positive source is 55V +ve .Because there is no voltage drop in open circuit. How can we identify whether this is the voltage which is series with the resistor or the DC source direct +ve.

1 Answers   GE,

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