How does frequency affect KVA rating of a transformer?
If a 500 kva, 500 to 250 v, 60 hz t/f normally used in Canada is to be operated in Europe on 50 hz
frequency then how will its KVA rating change?
a-increase
b-decrease
c-remains same
Answer Posted / jinboll
The transformer EMF equation 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) through the transformer core and the frequency. This leads to the flux is proportional to E/f.
For example, the kVA rating of the 500v to 250v 60 Hz transformer will be smaller when used in Europe with a frequency of 50Hz.
500/60 = E/50 E is smaller than 500v on primary side.
250/60 = E/50, E is smaller than 250v on secondary side.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
any idea abt REVERSE METERING concept.........?
how i calculate the syncrones generator NGR resistance .if we have a 6mw generator line voltage of generator 11kv also line current 393.3 ampere.
Describe Non I.S. Earth System and why is it used?
What fomula is used to calculate: 1. rated frequency withstand voltage, and 2. rated lightning impulse withstand voltage.
How can we connect additional batteries to three phase ups? What are parameters we have to check when connecting?
What is the function of RCBO? What are the different sensitivity ratings & each application?
What does Bode plot tell you?
what is the terminal voltage of dc series generator running at rated speed at no load?
Why to keep capacitor bank off while generator running.
please suggest some good universities with low cost iam in totally full confusion so please help me my profile gre 283 and ielts 5.5
can anybody tell me that for p.f. Improvment we use capacitor banks but how to decide its capacitance. As we all know how to calculate kvar but what abt capacitance value
What are the special cables required for explosion proof wiring?
How many types of faults are there in 3 phase power system?
salam,hi, i need to know what the spesification of 300amp msb...
clarify types of motor operated valves and advantages