Size of the 60Hz and 400Hz transformers is

a) same
b) 60Hz Tr s larger than 400Hz Tr
c) 400Hz Tr s larger than 60Hz Tr
d) None of the above

Answer Posted / dinkar

For same kva power , higher the frequency -lower the size.

Is This Answer Correct ?    1 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What are the causes of having an rmu explode after installation? And how do u treat the bushings of an rmu?

1924


State magnitude criterion.

660


what is transient stability analysis means?

1661


A logic circuit that provides a HIGH output if one input or the other input, but not both, is HIGH, is a(n)?

665


armature winding of dc machine produce alternating emf then it convert in to dc by using commutator.But only we consider armature resistance why don't we consider inductive reactane effect?

1616






(1)WHAT HAPPENS WHEN SUDDENLY LOAD GIVEN TO THE INDUCTION MOTOR ? (2)CAN WE MAKE WOOD AS MAGNET ? (3)WHAT IS THE VALUE OF MAGNETIC FLUX DENSITY IN TRANSFORMER ? (4)WHY WE ARE USING ELECTROMAGNETI NOT ELECTROSTATIC IN MACHINE ?

1663


Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault

1697


Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

1677


when the Transmission and Distribution network where is the "feeder" lines are located? and why should be used in T&D network.....

1251


which types of relay used in acb and vcb?

2312


how to calculate the cable current ratingand and how much of distance the rating will be ok will the distance is incresed what the action we take

1610


How to perform a DC resistance test In Alternator and their proceduces?

1059


why do we use 25kv supply for traction purpose?

1500


LET ME NOW MORE ABOUT icu and ics for circuit breaker. how we calculate the rating of circuit breaker and i c u and ics values

2426


why industry prefer ht motor instead of lt motor.

1637