Answer / omar aziz

Mostly standards (IEEE , ANSI) recommend 5% however, in
practical situations where a sound judgment can be made you
can strech it upto 10 - 15% at the load bus depending on
your min. voltage allowed by the motors/ other equipment.

Motors can usually start at around 80% rated voltage ,
however other electronic equipment such as UPSs are very
sensitive to voltage variations.

Consider the load before selecting this threshold otherwise
stick to 5%

we have 3.5MVA-11/6KV transformer. how can we calculate earth fault current and NGR calculation?

0 Answers   IGC,

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4 Answers  

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does buccholz in a transformer use batteries

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3 Answers   Haliburton,

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xpression 'document.FrmQF.myemail' [

0 Answers   ABB,

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What is spill current in protection relays?

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when we increased the current what do ?

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from which formula we select a capacitor rating?

4 Answers   Suzlon,

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3 Answers  

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