Answer Posted / jeff

dc only

How can we find out LT UG cable fault (size,from-4*25mm sqr to 4*300mm sqr)? How mani types UG cable faults?

3001

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Discribe type of fault in DOL and stardelta startor.

2196

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If only R Phase is connected in 2 pole elcb, n is not connected than it will work or not in ground fault.

1378

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Dyn1 transformer vector group testing how to do

1742

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What is the importance of earthing?

1058

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Explain the iniluencc of short circuit ratio on the pert'orniancc of synchronous machine.

2144

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what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?

1927

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1810

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

2612

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In the Variable Voltage Variable Frequency Drive, how the Voltage and Frequency varied ? Is it varied in the Inverter part of the Drive ? Please give us supporting document if any.

1902

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State Maximum Power Transfer theorem.

1202

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1. Can a 12v DC choke operate a 60v/12w PL lamp ? 2. Can a 230v ballast fire / operate a 60v/12w PL lamps.

2140

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magnetizer priciple

2009

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placing earthing pit in pathway is correct or wrong??. placing earthing wireGI1/18 inside walls is correct or wrong?. explain!!!

2106

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What is a single phase autotransformer?

1041

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