what is the function of 1 phase preventer?

3 Answers   ABB, Electrical,

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In a generator (Synchronous) does the rotor speed (frequency) corresponds to the speed of the water (in hydro). does the torque on the turbine relate to the flow of water?

2 Answers  

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Explain different types of d.c motors? Give their applications

0 Answers  

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Define cut-off rate?

0 Answers  

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Master trip relay code no

2 Answers   TR,

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corona happens more in summer or winter?

3 Answers   MAHINDRA,

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what is the difference between CVT & PT?

2 Answers  

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Why use only DC supply to charge batteries why not AC Supply??

3 Answers   APC, Emerson,

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Is a d.c.compound motor is use as a booster? how?

0 Answers  

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In alternator generally we give DC voltage to field of alternator but field (excitor)produce Ac & converts into DC by rotating rectifier(RR ) then fed to rotor .my question is why we cannot give dc voltage directly to rotor instead of Excitor & RR ?

1 Answers  

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I have three phase 400 KW,390 A MOTOR.For this motor which type of Cable is required....specifically rubber cable required. Can anyone help me..

5 Answers  

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We have three 33kv substations. All of them energised by same source.When i am checking the phase sequence between one substation to other substation (like R Phase to R Phase) by multimeter i am getting some voltage.Near to LT panels UPS panels are there. Can u explain whether any possible to happen like that. In Phase SEquencemeter is showing correctly in both substations. How is it happen. Explain me.Explain me communication signal will produce Phase difference on this case.

3 Answers  

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