could an induction motor be used for regenerative braking in electric-train control? in this type of application would some scheme have to be devised to obtain low synchronous speeds while braking? would induction-motor drive, therefore, be suitable for passenger service?

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HOW DO A DISTANCE RELAY SENSES THE FAULTY ZONE.

5 Answers  

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what ispositive, negative, zero sequence impedence?

0 Answers  

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How vaccum is formed to create a vaccum interrupter or anything related with vaccum?

6 Answers  

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in a dc shunt motor what happens if motor takes high current,no speed

2 Answers  

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my company total load is 1000kw, 415volt, all load are inductive load. incoming powerfactor is .8. we want to have0.95 pf connecting capacitors. so now how much rating of capacitors we have to connect? show how?

3 Answers  

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Is it possible to make a 5P10/ CT Ratio 50/1A Burden 5VA

0 Answers   Penspen,

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What is the criteria in selecting Air circuit breaker(ACB) & Moulded case circuit breaker(MCCB) for a particular range?

3 Answers   DLF,

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in basic 2 phase will short means tripping the power but spot welding 2 phase shorting but not tripping it will welded why.....(Q)

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How do you reset circuit breaker?

1 Answers   Bhel, Kaveri Steels,

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One of our gas turbine generator unit "1st stage rotor ground fault" alarm was occured several times. we tried to measure some voltage vulue ground fault protection relay (UNS3020a made by ABB and we measured the value of: Ground: 0.9VDC 5V: 5.8VDC 24V: 23VDC u+: 300 – 350mVAC Rf1: 17.5mVAC Rf2: 17.6mVAC The unit still running and the alarm was reset. As of 6pm yesterday and unitl now no alarm happened again. I our protection relay was defective?

1 Answers  

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if 300 hrs not comleted at wat interval b.c,d checks og take place

1 Answers  

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