Answer Posted / k.prakashchandra

Isc=I(100/%x)=941.18A

What is making & breaking current ???

1455

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hi pal, i am vengatesh from tamilnadu(chidambaram),i have called for the written test for the post of jr executive(ELECTRICAL) of AAI ,I dont know about the question paper pattern,so any kindly help me to face the examination,post me the model question papers and some tips to write my examination to (vengi.annadurai@gmail.com)

1837

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low frequency protection why recomend?

2234

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why the carbon brushes are broken in srim while the motor runningtime

1636

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What is stepper motor. What is its uses?

1169

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What is routh hurwitz stability criterion?

1128

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If there are two transformer having rating of 2.5mva, 6.6kv/440v(satr-star),and the load is 600kw then what is better to maintain less losses in transformer having both transformer in parellel or only single transformer connected to load? Please give calculated answer

2661

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what is spadar bar .why I use in DC generator.

1865

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What does the term power factor shows?

1047

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use of PIR in ehv breaker

2099

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how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

2317

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What is the loss of transformer of 220kv/11kv, 63/80 MVA and 18.05% impedance

1940

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If we use 250A MCCB as a incomer in Control panel for a fault level of 50kA for one second ,assuming temperature rise from 85 Deg. to 100 Deg , Then what will be the Aluminium Bus-bar size for 250A MCCB? Explain in detail.

2282

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Atwhat condition reverse power relay will act?

2209

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How to do cable sizing calculation for 750 A Neutral Earthing resistor for 33kv. the 33kv cable going to swbd. is 630mm2 3 runs.

4713

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