How does frequency affect KVA rating of a transformer?
If a 500 kva, 400 v, 60 hz t/f is to be operated on 50 hz
frequency then how will its KVA rating change?
a-increase
b-decrease
c-remains same
Also explain why do u think like that.
Answer Posted / guest
remains same since kva rating depends on iron loss and
copper loss which means it depends on voltage and current.
| Is This Answer Correct ? | 9 Yes | 44 No |
Post New Answer View All Answers
I am about to write exam in RRB bangalore for the post of section engineer.please provide me with previous exam questions
What is the basic principal, by which DC voltage level is increased more than the supplied AC voltage during conversion. As upto AC level it is contorrled by firing anlge but after maximum level how is it possible.Please clear picture. OR we have to supply the higher level AC?
what is stper motor
why we permissive overreach in distance protection.where it is applicable to use in long r short lines
how could we know the size of cable by physical view?
how to test and calculat the head and discharge in borewell compressor
How time response of the system is divided?
sail kaott diploma ece ke interviw me qus.kis parkar ke aate hai aur G.S me kya puchate hai kya sameedyaan me kis parkar ke qu.puchate hai
i want to apper for apgenco or aptransco or related can any one sugest me where can i get previous papers of thouse exams
What is the drawback of class b amplifier?
how to find the Motor,s insulation Power?
before synchronizing an alternator,power factor is leading ,why?
RESPECCTED SIR/MADAM- I AM PRERING FOR SECTION ENGINEER (ELECTRICAL) RRB CHANDIGARH PLEASE SEND ME SOME PREVIOUS YEAR QUESTION PAPER OR MODEL PAPER.MY EXAM IS ON (30- NOVEMBER 2008).I AM VERY THANKFUL TO YOU. FROM- HARENDRA SINGH YADAV
technically, what is the reason behind starting the motor star the delta connection .. and what other ways to do this rather than using " star-delta transformer"
Two bulbs of 100w and 40w respectively connected in series across a 230v supply which bulb will glow bright and why?