what is the advantage of using 3 phase line rather than using 2 phase line?

2 Answers   Havells,

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why we use REF and Differential Protection in one transformers?my doubt is both protections are operated in internal fault only.why we want to use 2 protections?please clarify.

7 Answers  

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how do we calculate of transformer in va?what is calculation?

2 Answers  

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Explain advantages of storage batteries

0 Answers  

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DC Motors applications used in Lift/Elevators

8 Answers   IOCL, SCS, Usha Martin,

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why are use star delta startor.

4 Answers  

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what is the mager value of star motor and delta motor between phase to ground and phase to phase, and minimum how much should be value ?

1 Answers  

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what is use of starter motor in DG ?

2 Answers  

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Which level of the Transformer oil got dielectric strengh? And why?

0 Answers   HSL,

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why odd hormonics only will effect the power system.why not even hormonics

2 Answers  

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what is the advantage of NiCd battery over Lead acid battery?

2 Answers   BARC,

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A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?

0 Answers  

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