adspace
why transformer rating is always in KVA
Answer Posted / parth patel
when we install any new transformer we have only load
current as known quantity accordingly the secondary voltage
is selected. but we dont know which type of load will be
connected on the secondary side it may be inductive ,
capacitive , resistive or combination of them.So as we dont
know about the load we dont know power factor of the load
thats why the ratings of transformer is in kva and not in
kw.
| Is This Answer Correct ? | 11 Yes | 13 No |
Post New Answer View All Answers
Don't you have similar question banks related to Oral Certification Examination conducted by Mercantile Marine Departments / Directorate of Shipping, Ministry of Shipping for Electro Technical Officer?
DRAW ACIRCUIT DIAGRAM OF 100 KVA 415V/55-0-55V DELTA TO STAR TRANSFORMER
what is the minimum pay scale for electrical engineer (building construction)in kuwait? plz revert back with yrs of experience & pay scale respectively.
How I can Compare 120v/60Hz versus 220v/50Hz ? Please tell me both advantage and disadvantage ......
placement paper samples of mspl company
Hello sir, pls send me hpcl technical test papers .i am. Appearing for the exam.
Can Anyone Answer anyone of these ? Q1) why direct SOLUTION of Load Flow Studies in Not Possile ? Q2)Why majority of Buses in power system are load buses Q3)Why one of the buses in Power system is taken as reference bus (slack or swing) Bus ? Q4)Bus Admittance Matrix is a sparce (means it contains some zero elements ) matrix , give reason
I have 2500KVA transformer delta/star,13.8KV/380V provided with LV 4000A breaker. Already I have 2300KW motor feeder with a full load 90%. Is it possible to connect another 1600A from that breaker? If so how the calculation is done?
Anybody tell me about modbus hex address of l&t trivector meter er300p??I want to read voltage,current,kwh etc via rs485...If anybody have a manual then send on my mail..Brijeshmodi18@gmail.Com
PLS SEND THE RRB CHENNAI MODEL QUESTION PAPER my email id is ganesan98655@rediffmail.com
hi friends i m from electrical branch and seeking for tech. + apti. both papers of hpcl plz get it available as soon as possible
A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.
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
What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)
where are the circulat the diesel in DG parts name with pictue