what is the difference between "Rotary bypass isolation switch and Normal bypass switch" pls share indepth techs?

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Different STANDARDS (BS, IS, IEC etc) gives different informations on CT specification. How they correspons w r t each other (i.e I mean to say BS provides "knee point voltage" but IS does not, then how can i select CT)

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One of the advantages of HRC fuse links is that they can be used to back up equipment with an inadequate rupture rating. briefly discuss what this means

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What is current and voltage?

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What is the minimum setting in REF relay because i am facing some problem whenever power resumes after power failure my transformer is tripping because of REF trip. I am using CSPC make numerical relay(DIP switches). Now setting is 15 percentage. What is the reason for this triping. I sm waiting for answer

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what is meant by real power,active power,reactive power & apprent power ?please explain it?

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Why do we have 110V, 230V, 415V etc. in electrical transmissions? Why not 100V, 200V,400V?

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Will transformer heating be approximately the same for resistive, inductive or capacitive loads of the same VA rating? Explain.

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what is meant by vector group in transformers? wy we r using that?

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What is the maxvoltage drop allowed at any healthy joint at full load ?

1 Answers   Kirloskar, Seyadu,

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Dear sir, iam completed iti ncvt electrician 2000-2002 & diploma electrical eng completed 2008-2010 distance education in rvd university, still i got B licences only but my working company want C licences, how to i get c licencese pls reply me iam in critical situation thank you karthick 9841637803

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In case of 3 phase motor why it is called single phasing by failure of one phare unless there is rest two phase are acting. ?

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