Answer / raghavendran

power frequency withstand capability of a CB is its
capability to with any over voltage at system frequency for
a definite period of time say 1min.

Impulse frequency withstanding capability is to withstand
the impulsive voltage levels for a predefined period of
time.say 1.2(rise time)/50 microsec(fall time),100KV
say(impulse voltage level)

Answer / ibrahim

the root mean square (r.m.s.) value of sinusoidal power
frequency voltage that the cb can withstand during tests
made under specified conditions and for a specified time

How REF protects transformer alone? explain with diagram.

0 Answers  

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I'm looking for a softcopy manual set for a Credence ASL- 3000. Anyone know where I can get it?

0 Answers  

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Where should the lighting arrestor be placed in distribution lines?

0 Answers  

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what is the difference between power and distribution transformer?

32 Answers   L&T, VJTI, Wenke Electricals,

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What is the difference between line Distance protection and Line Earth Fault Protection?

1 Answers  

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how to maintain frenquncy with syncronising sub-station for distribution

0 Answers   Suzlon,

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what is the diff. between x'mer , isolation x'mer & ultra-isolation x'mer ?????????????

0 Answers   ABB,

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Sir, I completed DEEE... And now I working in TNEB for one year apprenticeship. If I eligible for applying c license and how can I get?

1 Answers  

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Why Powers are named in MW?

1 Answers  

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why heat produced at junction of two different conductor. what care should be taken to minimize it.

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A 100 MVA transformer may be cooled with?

6 Answers   HCL,

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which motor will u use in refinaries?

1 Answers   IOCL,

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