What is basic impulse insulation level? And how it is calculated for sub- station?

2 Answers  

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what is phase voltage and line voltage? in line voltage how 415v is obtained?

9 Answers  

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In chillers & freezers which gas will be use?

3 Answers  

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what is difference Auto-transformer and ICT ?

1 Answers   CG, Descon,

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how to select cable size?

7 Answers  

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what do u mean by starting torque? how it should be for a good motor? what is the relation between starting torque and power factor? What is the relation between efficiency and starting torque?

2 Answers  

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234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

0 Answers   Jubail O&M,

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what is principle operation of transformer?

9 Answers  

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how would you determin the horsepower of a motor without a nameplate

3 Answers  

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Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise,give with best examples.... please help me in this regards....

1 Answers   Modi Builders,

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why neutral is neccessary?

7 Answers  

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why the excitation is necessary to produce the reactive power

2 Answers  

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