how to Select Lighting arrester? What r the parameters to be considered for the selection of Lighting arrester ?

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hi can any body send me syllabus of rrb electrical section engg... and past pepar also of any board...

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To make a basic instrumentation amplifier, it takes A One op-amp with a certain feedback arrangement B Two op-amp and seven resistors C Three op-amps and seven capacitors D Three op-amps and seven resistors

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Can without battery on line UPS,off line UPS or Invertor works please brief.

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what are the main Parts of VCB

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What is the funstion of buscoplure in LT panel? which propouse using the buscoplre

2 Answers  

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please send me last 5 year interview questions

0 Answers   ONGC,

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there is a line fault some where on the ove head distribution line. how will i locate the fault for clearing it? ofcourse i have to megger the line but what information makes me clear that the fault is in that section of the line?

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WHAT IS THE DIFFERENCE BETWEEN A DC MACHINE OUTPUT AND RECTIFIER OUTPUT...

3 Answers   Cesco, NTPC, RRB,

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What are the reason of unbalanced secondary voltage of HT transformer 33kv/6.6kv ? Incomming voltage is balanced.33kv each secondary voltage 6.6 kv 6.4 kv 6.4 kv At no load conditions.

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Slip at maximum torque depends on A rotor resistance and reactance B stator reactance C load current D stator resistance

1 Answers  

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HOW DO A DISTANCE RELAY SENSES THE FAULTY ZONE.

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