Can the efficiency of transformer be measured with the help
of wattmeter readings taken at primary and secondary side?
Support the answer.
Answer Posted / iamdon
No,Transformer efficiency measured with the help of
wattmeter can't be reliable.
The reason is
The efiiciency of transformer is very high (order of 98.5-
99+)% due to static nature of it.The error associated with
ordinary wattmeter is in the range of 1-2 % .Under this
condition the readings taken cann't be reliable.
The efiiciency is measured with the help of data taken from
two tests namely
Open circuit test--indiaction of core loss
Short circuit test--indication of copper loss.
Author:arbelectbit@yahoo.com
Is This Answer Correct ? | 2 Yes | 2 No |
Post New Answer View All Answers
What is the requirement of grounding the neutral of single phase generators on load? If the neutral is not grounded, what will be the effect?
difference between ac series and parallel circuit
What are your personal skills and abilities for such a Master Course and your possible preparation to undertake this course?
Why does increasing the magnetic flux in the main field of a d.c motor cause the armature current to reduce??
how much value of resistance should connect to 15 kw, 6 pole 3 phase slip ring induction motor having RV-240, RA-42.
what is the main difference between power devices and signal devices
i am in need of AC SYNCHRONUS MOTOR 30KW. ANY ONE KNOWS THE MANUFACTURER OF SAME. ALSO MOSFET AC CONVERTER 20KVA CONT.OUTPUT.
in my industry we are using 3 step up transformers for induction heaters..i.e 415/580v and other are 11/440v.in power consumption does a step trnsformer makes any difference compared to step up?? plz explain
Explain the propagation of harmonics in the network and influence of phase angle of harmonics.
Hi everyone. Some Generators uses 3-Pole breakers with extra contactors for Neutral. Some uses 4-Pole. Why so? What is the idea behind this? Thanks in advance for the solution. Kr.
What is meant by load angle of an alternator? Upon what factors does the load angle depend?
impliment (AB)`+C to transistor representation
What is the basic principle of welding process?
I am doing apprenticeship training at HT switch yard in NLC. How can i get electrical c license. ??? What r the rules for getting it as an apprentice? ??
which are the criterias needed to select the kind of neutral earthing(solid earthing,resistance earthing,etc.) at various voltage levels in electrical distribution?