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 / cameron hunter
The transformer EMF relation shows that the EMF induced in the secondary or the primary side of a transformer is directly proportional to the product of the flux (Φm) and the frequency. This also means that the flux is proportional to EMF over frequency.
As an example, for the 500V to 250V transformer, the kVA rating under 60Hz transformer will be smaller than 50Hz. 500/60 = V/50. V has to be smaller to keep consistency.
Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
Plz tell me how we can find that particular company has vacancy or not
sir iam a 3rd yr eee student.no core company comes for recruitment to our college.my aim is to be placed in l and t.tell me the procedures.
What size cable (based on voltage drop) is required to supply a 40 A three phase boiler if the wiring system is 75V single insulated cables installed in non-metallic rigid conduit 56m from the main switchboard? Voltage drop in the consumer's mains is 8V.
What is marx circuit?
What is a differential amplifier? Also, explain cmrr.
what is under coal gassification?
What is the settings of distance protection relay in 400 kv line
why US countries maintains 110v and 60HZ
If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?
11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter
Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,
what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.
Why 11kv to be generated in generation station
what is the significance of tan&delta and how it performed in power transformer
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