Answer / bvyankatesh

Dc means single polarity supply, when dc supply is given battery is charged with positive polarity only and on application of loaddstorage energy in battery will discharge. tut if there is a.c. supply is given then after each half cycle polarity of supply get reverse it lead to maintain stored energy's in battery is zero.

What type of isolation transformer used in UPS's?? It's Star-Delata Or Delata-Star????Why it is used????

6 Answers   Emerson,

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Find active & Reactive Power transmitted in a transmisston line having Vs30 degree(sending end) to Vr(zero degree)at receving end with line inductance X ohm. Vs(30degree)-------------------Vr(zero degree) X ohm

3 Answers  

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All tape of electrical questions Answers tape of motor transformer e.o.t crane

0 Answers   Afcons, Honeywell, Manlift, SIMS,

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what are the standard values for resistances(Megger testing) between L&N, L&E and N&E (L=Live,N=Neutral, E=Earth)?

1 Answers   CESU,

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line diagram for mcb , mccb , rccb .

1 Answers  

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can we use the step down transformer to step up transformer

6 Answers  

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why open-delta core of 11kv Potential Transformer is 11000v/1.732/110/3?

1 Answers  

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can you send me the placement papers of electrical engg. from companis like NTPC,DRDO,IOCL,HPCL,BPCL etc.?If,plz send as soon as possible.Thanks.

0 Answers   NTPC,

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explanation of mesh bus bars

0 Answers   Eskom,

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which electrical supply used for long distance traction 1.1-ph 22kv a.c 50hz 2.2-ph 22kv a.c 50 hz 3.dc vtg 4.1-ph 22kv 150 jhz

3 Answers   Power Grid,

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Wt is the function of reactive power? How it generates & consume though resultant is zero?

0 Answers  

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what is the different between bus section and bus coupler

2 Answers  

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