Answer Posted / avinash

sir,we also use 3 wire,1 wire for +,2 wire for -,and wire
for earthing

IN dc capacitive reactance is??

1346

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Where is servomechanism used?

1123

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Why reactive power is needed in a power system? How is it being absorbed or delivered by alternators? For reactive power control we are changing excitation but reactive power absorbing or delivering related to stator. How these two are interlinked? i want a detailed explanation with necessary expressions and figures?

1849

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List few applications of d.c series motor?

1087

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What is relation between transmission lines & Communication lines ?

2134

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why sielent pole is used only in hydro generators and not in turbo generators

4113

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what r the safety measures in UPS ? explain all?

2171

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what is the VA(Volt-amphere)? define with calculation?

1222

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A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.

1817

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what is load vs Torque curve & why it is used?

2017

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WHAT IS VCB SAFETY

1188

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size of condotory fron voltage level

2159

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What is dynamo?How it works and what is the function of dynamo in a DG.

2081

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What is the ratio of Booster transformer?

2115

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why motor range is available 22kv,30kv,37kv,45kv and so on? why motor range is not available 21kv,24,25,26,27kv and so on?

2745

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