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Faculty Name: Thotakura NSC Sekhar
Discover the reason why transformers and alternators are rated in kVA, and why batteries are rated in Ah. Learn about the units of measurement used for transformers, alternators and batteries, and the factors that determine their ratings. Find out why kVA is used for transformers and alternators, and why Ah is used for batteries, and understand the significance of these units in electrical engineering. This video provides valuable insight into the world of electrical power ratings, and is a must-watch for anyone interested in the subject.
Video Bookmarks
Introduction 0:00
Regular answer for why kVA: 01:00
Actual answer for why kVA: 02:10
why battery is in Ah: 08:05
Question & Answers:
Q: Only kVA rating of transformer is enough?
A: No, along with kVA rating, current rating, voltage rating and many other specifications will be given in the transformer.
Q: Why power plant rating is in kW
A: Power plant rating is not the generator rating, it is the turbine rating. it is how much mechanical power a turbine can produce.
Q: Descriptive answer for why transformer in kVA
A: During manufacturing stage of the transformer, the manufacturer doesn’t know the pf of load at which the transformer is going to be operated. Therefore, the manufacturer will design the transformer based on voltage and current ratings of transformer and rating fixed by the manufacturer is always in apparent power.
and Constant losses depends on V
Variable losses depends on I
Total losses depends on V and I
∴ Transformer rating depends on (V*I), which is VA rating.
1HP= 735.5 or 745.6 Watt, check this video
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12 июл 2024
