A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.

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If we increase frequency in transmission line in lieu of voltage what will happen?

1 Answers  

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In the magnetic fluxes, what is the role of armature reaction?

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generally the electrical equipments not to be operated at leading power factor, why?

2 Answers  

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Why r used of cable 50sq.mm and above size cable in 3.5 core. And below size in 4 core ? any technical reason please explain it

2 Answers  

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sir please send me previous year questions of jspl through which i could prepare myself fpr the test.

64 Answers   FGH, HFT, Jindal, Jindal Steel and Power, JSP, JSW, Lin Engineering,

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when the size of the cable used for the ht voltage is 300sqmm then what is the size of the conductor of each phase

2 Answers  

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power transmission pole used one support , that only for support or earthing

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How do you calculate of power factor, if it is lagging or leading for unit(1).

4 Answers  

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why in america the supply frequency is applied as 60 HZ. but in india we use 50 HZ.

1 Answers   Elcom International, HCL, NTPC, OMC,

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What is the minimum value of hfe for the oscillations in transistorized rc phase shift oscillator?

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why transformers not work at d.c.-

3 Answers  

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