How does frequency affect KVA rating of a transformer?
If a 500 kva, 500 to 250 v, 60 hz t/f used in Canada is to be operated on 50 hz in Europe
frequency then how will its KVA rating change?
a-increase
b-decrease
c-remains same
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 ? | 1 Yes | 0 No |
what is ATS & RING MAIN UNIT in Distribution System?And its Function.
how to interlock 3 incomer-ACB,1 buscoupler ACB,... pls answer this question and if possible send me the ckt diagram..haifriends2910@gmail.com
1.what is surge 2.what is lightning 3.what is switching 4.difference between surge,lightning,switching used in power system 4.definition of surgearrestor,lightningarrestor 5.adv and disadv of surgearrestor,lightningarrestor 6.uses and purpose of surgearrestorand lightning arrestor 7.block dia of surge arrestor 8.blockdiagram of lightning arrestor 9.operation and working of surge arrestor and lightning arrestor 10.basic formula of surgearrestor and lightning arrestor 11.basic diagram of surge arrestor and lightning arrestor
1 Answers Crompton Greaves, Framo, L&T,
What is the criteria for selecting the voltage classes of an AC Induction Motor.The KW rating above/below which ht/lt selection is made may be provided in details.
What is corona? and what is the purpose of corona belt in substation ? why they connect these end of the buses ?
If I have a motor of 1MW with 6.6kv, running at 35% load, how can i save energy without reducing the load ?
Which one is given high energy in same power consumption AC or DC
What is the differences in phase to phase voltages between star and delta connections of stator?
what is the fullform of mccb
what is the value of combined earthing in general electrical circiut?
0 Answers Cathtect Engineering,
What is the actual calculation for transformer short circuit test?.
What would be the size of wire used for 2 Ton of window A.C?