what is buchholz relay?what is it used for?

8 Answers   Engineers India Limited, NFCL,

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We have a couple of oil tanks at our plant. One of them does not have a lightning arrester installed. My question is it necessary to install an arrestor on every tank or will this particular one be covered by the arrestor installed on the ajdacent tank, Since all the tanks are close to each other. Basically, I want to know that if these arrestors or protection works in a parituclar area of effect or influence. Thanks

0 Answers  

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Why reverse relay used

2 Answers   cpgn,

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How can you measure battery AH?

1 Answers  

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Describe Non I.S. Earth System and why is it used?

0 Answers   KPJV,

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140 is load amps for a equipments and what ratio of CT requied for installimg ammeter to amps montering purpose?

1 Answers  

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What is nyquist contour?

0 Answers  

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In India which type of PLCC IS used?

2 Answers   Cipla, Ford, Jayashree,

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what is the problem of generator over voltage.?except automatic voltage regulator card

2 Answers   Siemens,

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Which of the following are ill suited for energy efficient motors application?

0 Answers  

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how can we select the appropriate VCB ?

0 Answers   Reliance,

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what is rating boiler

0 Answers  

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