Answer / e.subhash

the arc density is more, hence the natural air is not sufficient to quench the arc so ACB is not using HT side

what type of protection and safety req. in the 220kv substaion and area around the substation

2 Answers  

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What are various impedence in any machine

2 Answers   Engineers India Limited, NTPC,

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What is the rotor frequency of 10 Hp 1440 RPM 50HZ 415V ?

0 Answers  

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I have tow 200 KVA UPS, both are in parallel mode.My question is that, both are running on battery when power fail, if one of them fail (Eg rectifire fails or some other reason), at thet time reverse power will come to faild ups if it comes then it will harm to failed ups or not? if not then how it protects to faied ups????????????????

1 Answers  

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Why lightning arrester blast in rainy day?

1 Answers   Eco Cement, Mahaveer, MBDL,

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how to calculate no. of earthing pits and their diamensions? no. of lightning arrester rods which are required to protect a building of 35 mtr and we calculate?

5 Answers   Dharampal Premchand Limited, FlowMore, Hindustan Zinc, Ispat, Maheshwary Ispat, NDDB, Siemens,

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How Id and Ires are calculated in siprotech 7ut612 and abb trsfmr differential relay.what is the formula

1 Answers  

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why always out of the 3 phase(RYB) of supply, in Y phase w.r.t the voltage is higher? on R & B phase the voltage will be lower as compared to Y phase?

1 Answers  

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What are merits & De-merits of State-Space Method? What is series programming, parallel programming, general programming & direct programming ? And, difference between these programmings Techniques ?

0 Answers  

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what is MAR

1 Answers   NCC,

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how to measure the dc current?

3 Answers  

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why capacitor using the induction motor?

5 Answers  

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