Answer / krishnappan

in switchyard first our earth switch should be open.
after that close the bus isolator,then line isolator.
finally close the circuit breaker

Answer / sandeep

in case of maintainance first open the circuit breaker then
open the isolator then close the earthing switch
and while charging the line do exact reverse i.e. open
earthing switch first then close isolator then finally
close circuit breaker.

What is the minimum insulation value required for a cable between phase to phase and phase to earth of 380 Vac 50Hz circuit, having load arround 800 amps.

2 Answers   DEWA, TATA,

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How can we select suitable capacity generator for three phase load (inductive load) and how to take study analysis in 3 three phase load system ?

0 Answers  

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What is inverse definite minimum time lag relay? Where is it use?

0 Answers   TATA,

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In parallel operation time both NGR’s close or not close if both close what will happen

0 Answers  

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Less cost of delta connection over star connection a. No fourth neautral wire

1 Answers  

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What does the term supermesh means?

0 Answers  

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what is meant by IGBT how they differ from tyristor ?

0 Answers  

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Which are Electrical componet and Electronics componet??

2 Answers   KarMic,

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relation between voltage and frequency.

5 Answers   IIUI, Lucky Cement, Reliance,

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For a 500 MVA 400/220/33KV transformer following data given HV power = 500 MVA IV power = 500 MVA LV power = 5 MVA If input power is 500 MVA then how output power is (500+5)MVA. Can anyone help

1 Answers   MEIL,

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Is this possible to synchronize the two different ratings of dg

1 Answers  

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how are reversing the direction of rotation of dc motor

0 Answers  

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