what is formula in determining the size of Circuit Breaker for transformer with the following specifications. 7 units of 1600 volts (primary) and 400 volts (secondary). Both Primary and Secondary will have a circuit breaker which is SF6. What should be the Switchgear Main Breaker Size anf the sizes of each brances Circuit Breaker for Primary.

1 Answers   ABB,

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why the electric train touches only one conductor n where is the neutral n it will be running 3-phase or 1-phase?

3 Answers  

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how and where megger works?

9 Answers   Power Grid,

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how to calculate the change over time for star delta starter for different KW motor?

0 Answers  

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why transformer impedance measure in % (percentage)

4 Answers   Hindalco,

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why there is a fault occurs, if a phase wire touches ground.. and the fault not occurs when we connect a bulb between phase and ground..??

1 Answers  

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What is the reason of using bus-bars on the secondary on the LT transformers?

2 Answers  

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What is the purpose of SOTF being used inspite of distance Protection given?

7 Answers   Alstom,

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It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.

0 Answers  

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How DC earth leakage currents can be reduced ?

0 Answers  

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what is the differnce b/w voltage and current

8 Answers   Steel Plant,

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What are the different power system losses and how can it be eliminated?

0 Answers  

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