How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f normally used in Canada is to be operated in Europe on 50 hz frequency then how will its KVA rating change? a-increase b-decrease c-remains same

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what are the basic concept to design a out door Substation?

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What is the basic difference between synchronous machine and induction machiine?

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Mr. mohh sahid m not satisfied for ur answer to the que weather the size of transformer increases or decreases withchange in fr for more detail go to the answer given by me

0 Answers   Sail,

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What is mean by diversity Fator?

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At the starting of dc motor and syn.motor and induction motor high current flowing through the winding. Due to this the windings burnt out. To avoid this different types of starters are used. But incase of transformer what Will be used (At starting no emf is induced in the primary winding)?

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WHAT IS THE USE OF ANTIPUMPING CONTACTOR IN HT BREAKERS

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if we use contactor & MCCB both in a feeder.in this feeder rating of contactor is higher or lower or same of MCCB rating & why?

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how we can measure the dc current instead of clamp meter ?

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In what cases (circumstances)we should apply P controller, PD controller, PI controller & PID controller ?

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How do we calculate the Out put voltage of generator, after the excitation is being given?

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RATING OF LIGHTENING ARRESTER FOR 11 KV LINE IS 9 KV BUT WE KNOW THAT LIGHTENING ARRESTER IS USED FOR OVER VOLTAGE PROTECTION SO WHY NOT THE RATING OF LIGHTENING ARRESTER BE MORE THAN 11KV ???????????????//

5 Answers   Hakel,

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