Interested to Buy Any Domain ? << Click Here >> for more details...
why transformer ratings in kva?
- 99 Answers
- 231821 Views
- Bhel, College School Exams Tests, DOW, Emco, Esab, GE, KCP, PGCVL, Sodexo, TCS, vtps, Wipro, I also Faced
- E-Mail Answers
Answer Posted / princealekota
Since transformer is a static there will not be any
rotational losses it have only iron loss depend upon
voltage and copper loss depend upon current
for AC supply systems like generator, transformer rating is
done in KVA because of inductance present in AC . we don't
know load is resitive or inductive
so we will take load KW=KVA,
power = voltage*current*cos(pi)
if load isinductive cos(pi) have some value less than 1
if load is resistive cos(pi)is 1
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
what is earthing.how we make it,describe briefly.
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
Control cables in S's will carry 1000v which is AC R DC? Pls answer me
Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?
What is vacuum circuit breaker.define with cause and where be use it device?
detailed procedure how we calculate cost for pcc m10 and rcc m20 including centering and labour excluding steel/ iron
What is dc current source? Differentiate between ideal and non ideal current sources?
What are chief characteristics of state-space method and its techniques ?
What is the difference between Encoder and Resolver?
What is Fire Panel ? How it works ?
I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?
What is the lower limit of break-down voltage of converter transformer.
TO CALCULATE THE RESISTANCE OF GRR OF HT MOTOR 400KW WHEREAS STATOR VOLTAGE 6.6KV AND ROTOR VOLTAGE 705V AND ROTOR CURRENT IS 346A.
what is magnetizing current test in power transformer
How we can calculate the Amps for the cable Ex:- For 1sqmm wire how many amps we can draw (calculation)
