Follow Our FB Page << CircleMedia.in >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...

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

How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f used i..

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

More Electrical Engineering Interview Questions

What precautions we have to take while handling electrical equipments?

why the Different manufacture's rating of Gas genset are different? i.e : cummins genset rating is in KVA .( 625kv). While GE- Jenbacher make genset have rating in Kw. (625 kw)

DG lube oil and waste oil how to dispose outside and there is any authorised vendors will be there for this.

I am in last year of Engineering.I want to apply for ONGC on GATE based score.They require Certificate of Competency as Electrical Supervisor.How can i get this certificate so I can apply for AEE(ELECTRICAL) in 2016

To avoid arcing what we connect in earthing.

what does work of electrical technician in industrial

What is the formula to find out the kvar required to improve the powerfactor from .85 to .99 at 1500kw, 415v.

best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?

How to design power source say 5KW i/p :415v 3 ph, o/p 5KW constant, variable currnt and variable volatge 10-230v,

Please explain the following and how these are working with PLC unit 1.I/O Module 2.I/O Device 3.Adaptor Card 4.Ribbon Adaptor 5.RS 485-FC

for testing busbar (33kv) hi-pot .whether we can apply DC r not.and what is the test volt for that .explain

if a 3phase 100kva distribution transformer , 400 v,50 hz, 4-wire system is loaded at 160 k.w mostly 1-phase Lighting & Airconditioning split a.c load what will be the net effect on the power system in terms of voltage, powerfactor, current , efficiency of xformer

Categories
• Civil Engineering (5073)
• Mechanical Engineering (4444)
• Electrical Engineering (16591)
• Electronics Communications (3915)
• Chemical Engineering (1092)
• Aeronautical Engineering (214)
• Bio Engineering (96)
• Metallurgy (361)
• Industrial Engineering (258)
• Instrumentation (2986)
• Automobile Engineering (332)
• Mechatronics Engineering (97)
• Marine Engineering (122)
• Power Plant Engineering (170)
• Textile Engineering (575)
• Production Engineering (0)
• Satellite Systems Engineering (106)
• Engineering AllOther (1377)