Answer / subbu

DC series motor using in Train because it can start with load....

Answer / swum

DC series motor cause of high starting torque, robust and
reliable, constant horsepower operation, can draw high
current for short period and good efficiency

For further info refer Electric Drives by P.K. Sen

Answer / g a reddy, essar steels ltd, v

Dc series motor used in local train. Because local trains has to stop/start for small distances i mean will stop at all stations. So for this type of applications DC series and compound motors will serve the high starting torque at low speeds. For local trains high starting torque is more important to save time. If we use other motors train will pick up speed slowly, so time span will be more to pick up speed.

Answer / ranjeetsinghbe

DC shunt motor... becoz in this motor load is directly
prop. to speed....

If the rotor pf of a 3 phase induction motor is .866, then what is the phase displacement between stator and rotor magnetic field 1)30,2)120,3)150,4)90 please justify....

2 Answers   GATE,

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For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.

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1 Answers  

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what is the difference between surge protection capacitor and surge arrestor

0 Answers   NCS, NCS Sugars,

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generator means

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1 Answers   Aurobindo,

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If the kvar rating of capacitor bank is 600 kvar at 525V then what it's rating at 415v.

2 Answers  

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1 Answers   DLF,

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What will be the resultant out put voltage when two different voltage rating batteries are vconnected in parallel? pls. answer with example if available.

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