Answer / sami thamer

the value of the (KA) in (mccb) represent the resistance to
current rising occuring at the short circuit or at
earthleakaging.

Answer / utsav datta

KA denotes the s/c current breaking capacity of the circuit
breaker under s/c condition.
The improvisation is actually resistance to current rising
at s/c.

2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?

0 Answers  

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When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

0 Answers  

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Why can't we parallel Voltage transformer secondary circuits?

0 Answers  

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how to make neutral to ground voltage less than 5v? my house is under the high voltage transmission line so,proper grounding using rod salt n coal doesnt help me..so wat i do as i cant operate my computer ..this high voltage cause great problem to the motherboard i already two times replaced it.in my house voltage is coming near to 25 v between ground and neutral.plz kindly post ur answer to my email id manish77777@gmail.com ..

3 Answers  

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What is Long rod insulator and it's applications..? merits over the disc insulator ..?

0 Answers  

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how to select fuse in any circuit? if with fomula ?and examples also

1 Answers  

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Explain how you decide what size of electrical wire do you need?

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how to calculate efficiency of voltage and current controlled welding transformer?

1 Answers  

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in shunt clippers why a resistor is used in sereis with the input

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My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

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what is the correct method for the outdoor termination of 19/33 KV HT cable step by step?

0 Answers   Finolex,

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who iz power minister ?? :P

1 Answers   IOCL,

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