Answer / zahid hussain

You can simply calculate HT FLA like- MVA/Sq root of 3x HV
or my simple technic KVA/19.20, 630/19.20= 32.81A is HT side Full load current and you can use 2 times higher ratings cable....

how to meas-our losses for L.T & H.T

0 Answers  

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which bridge is used to measure frequency?

2 Answers  

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How will you define capacitance?

0 Answers  

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What is diversity factor.

2 Answers   Cadbury,

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What will happen 50 HZ motor when you will give 60 HZ?

7 Answers   Bhushan Power Steel,

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How to select the releases for MCCB ?

1 Answers  

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what is doubling factor in making current of a breaker?

0 Answers   BARC,

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how to find number of run cable laying[LT side] for transformer & alternator secondary side? [above condition for getting output power transformer to main panel side] give the example.

0 Answers   L&T,

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When a capcitor is used on 440 v thenthis is kvar rating 25kvar .my question is that when we use this capcitor  use 480 v &525 volt .how much kvar increase . Plz give my question ans. And give answer with formula .my mail id is rohitashsaini013@gmail.com

1 Answers   Neptune,

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How to apply 'c' license and also explain what is difference between 'c' and 'b'license.i am also working in one of the private company.i have finished my diploma in 2014 .i have already finished in ITI electrician course.....

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Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?

6 Answers  

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Why indicate only 440V to 3-phase supply.

4 Answers  

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