Answer / disha rane

In a transformer, the copper losses depend on current and the iron losses depend on voltage. Thus, the total losses depend on volt ampere and not on the phase angle i.e. independent of load pf. Hence rating in kVA and not kW.

Answer / hemalatha doddi

in transformer only voltage and currents will get changes
there is no change of p.f. hence its power is said in kva.

Answer / laxmikanta sasmal

bcoz it's unit is not depend on the power factor of the system.

Answer / viral shah

B'coz load on the trasformer is not decided at the time of
manufacturing.it may be inductive,capacitive or resistive
so p.f. varies accordingly that is why transformer unit is
in KVA.

Frequency of rotor emf in induction motor is around A same as stator frequency B 50% C 5 % or below D 30%

1 Answers  

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What are the causes of motor vibration?

3 Answers   Equate,

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In a 11kv/433v transformer,at the LT side ie 433 V side why do we need to put 3.5 core Cable upto Panel.The full load rated Amps is 666 at LV side.What value of current will flow through the Nuetral Conductor.Why can't we use 4Core Cable instea of that?

2 Answers  

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why genarator genarating voltage 11 KV?

0 Answers  

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Anybody know how schematic diagram for reverse power relay? RPR for generator protection

0 Answers  

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what is the pressure of vacuum circuit breaker

2 Answers  

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which is batter in construction job,ELCB or RCCB?

7 Answers   HCC,

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If ac voltage applied to the field of dc generrator the output of dc generator ?

1 Answers   SSC,

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whenewher three phase supply is given to induction motors revolving/rotating field is created & rotor rotates.When the three phase supply is given to three phase transformer then revolving,/rotating field is created or not? if not why?

1 Answers  

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how we can select a transformer based on a particular load. suppose we have 4 motors of rating 40 h.p , 50 h.p, 80 h.p & 100 h.p. then what rating of transformer we can select. urgent. pls reply

6 Answers  

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what is the difference beteen differential protection and over current protection of an alternator

2 Answers   GVK,

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What is the purpose of using busbar mounting fuse?

0 Answers  

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