Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient?

1 Answers  

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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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Why we did not feel electric shock in electric train?

1 Answers   NTPC,

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in Telecom DC system-why positive +ve is made earthed.and - ve is fed to load.

0 Answers  

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how does calculate loss correction factor in transformer

1 Answers  

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how can we test the polarity of a 3-phase transformer?

2 Answers  

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In 3pin or 5pin socket why the earth pin is bigger

3 Answers  

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sir, why alternator output is connected to delta side in to generating transformer? any reasion?

3 Answers   Kirloskar,

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Brief function of stepper motor

1 Answers  

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why the all high voltage transformers are in 11kv , 33kv , 66kv, 132kv like that

2 Answers   Bhel,

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In electrical what is earth(ground)connection, wht is the importance of it, why it is recomended to maitain below 3VAC between Neutral and earthspecially in PLC used machines?

0 Answers   Nissan,

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a 3 phase slip ring induction motor is wound for 4 poles on stator and 6 poles on rotor; when 3 phase balanced voltage source at 50 hz is applied to motor it will run at a)1500rpm b)1000rpm c)750 rpm d)zero rpm

13 Answers   Essar, PSPCL, PSTCL,

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