A circuit breaker on detecting fault will a. Open b. Close c. Open and trigger the alarm

2 Answers  

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Why there are semi conductor layers on conductor and XLPE insulation of HT cables

1 Answers  

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What is genrally the % Impedance of a Dg set? How can we calculate Earthing conductor size for a DG set?

0 Answers  

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Is MEN and RCD related to each other ?? IF yes then how??

0 Answers  

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What is the meaning of Fault level rating?

1 Answers   Balrampur Chini Mill,

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following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

0 Answers  

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why the transformer primary and secondary windins vector groups vary? why it is something like Dy11 and not as Dy or Yy...

2 Answers  

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What is the principle of residual protection?

0 Answers  

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our scope called one core cable for distribution system so we like to use 4 core cable with one equipment grounding conductor so what kind of technical reasons i can say that the 4core is better then 1 core,

2 Answers   Elite Construction,

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Why effective AC resistance is more than DC resistance of a transmission line?

9 Answers   HCL, ONGC,

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Why the core of a underground cable is spiral in shape instead of straight??

3 Answers   Mecon,

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suppose generator rating is 50 kw,load is 25 kw,hw much d generator ll generate?what about d remainin power?

2 Answers   NHPC,

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