Answer Posted / rajesh kumar

we use y-y connection in power transformer 132kv as we know
that in star connection line voltage is-1.732.phase
voltage.so it is easy to insulate the winding as the
voltage level is low.and cost is less due to degrading of
insulation.

There is air in a room . the top and bottom of the room are at constant temp. T1 and T2. DRAW THE temp profiles if a. T1 greater than T2 b. T1 less than T2

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what questions are asked in the interview for the post of an electrical maintenance engineer in FMCG companies?

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can you plz send l&t aptitude questions if available its urgent plz plz plz

2169

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what are the types of electromagnetic forces developed in practical transformer?

2672

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Explain how you decide what size of electrical wire do you need?

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What is trip and closing coil in cb? Why need of them

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We have 90mX100m hangar with 16 no.of supporting pillar. It is required to provide power supply on all pillars. what is suggested earthing scheme for hangars.

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list the advantages of RCCB over other circuit breakers?

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what is the use of expulsition protective gap in 11Kv line.

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what are the protecyion of transformer & generators

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how the testing of protection CT Testing done through Primary injection kit please describe in detail procedure...

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When color of silica gel will gets change from blue to pink from Top to bottom?

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I WANT YHE TECHNICAL AND ELECTRICAL SPECIFICATIONS OF 2x4MW 11KV 2x10MW 11KV 2x25MW 11KV 2x100MW 11KV HYDEL POWER PLANT i.e PROTECTION SYSTEM,MONITORING,CONTROL SYSTEM,GENERATION,SYNCHRONISATION,METERING PLEASE SEND THE DETAILS TO MY MAIL ID SPRAVEEN_222@YAHOO.CO.IN

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How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.

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what is the effect of vector group while phase sequence of a generator changes,whether the vector group changes or not

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