how can we find a burden of potential transformer? what
does it effects? how can we calculate rated load of it?
- 4 Answers
- 32709 Views
- Areva, KPTCL, I also Faced
- E-Mail Answers
Answer Posted / tuktuk
Dear Mr.Raghavendran,
Thank you for your answer, I have the same problem but after reading your answer I still have some concerns.
I am really confused. In this case, we do not know the rated burden of the VT. Now we have to calculate the total burden and then selecte the rated value from IEC standards.
__Ztotal, which you mentioned above, is in Ohm or VA?
__Zsec and Zrelay we can get the value from manufacturer but Zlead, is it calculated by this formula: Zlead= (p*L)/S
(where: p is specific resistivity of copper in ohm.mm^2/m; L is length of lead between the PT secondary and the relay in meter; S is the section of lead in sqmm)? Is this true?
__I dont know how can we get secondary current Isec? (I guess Isec=Usec/Zt, isn't it?)
__And Burden in VA = Zt*Isec. As Ohm law, we have P=VI=RI^2=U^2/R, I do not understand the formula that you used to calculate Burden of VT in VA
Hope that you could help me to solve this stuck in my head.
Thank you.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
hello everybody. what does an abnormal stator winding impedance or dc resistance show? thanx
What is the use of bundle conductors?
How much pf maintan in dg set in 6o% load,when Dg runnig Neutaal Earthing removed what happen.
How we calculat the NGR of 3phase Generator, Our generation voltage 11KV
what is the difference b/w pvc cu conductor and cu breaded wire..?
from generating station If 400v LT line length is 1000m how much voltage is drop and how do i calculate it? which cable will be use for this line?
how we do Vector group ,magnetic balance and tap changer test in Transformer?
from which formula we select a capacitor rating?
THERMAL CAPACITANCE IS MEASURED IN..................................................
defination of transistor controlled series capacitor
hello friend i wish to study a course related to the electrical construction, controlling and monitoring , which course i want to study? pls give me the name of institute?
diff. between tension mode & speed mode
I am shobana from Chennai. I am having my personal interview on 19th Dec at Chennai.kindly mail me the questions to mail id shobana.shanthi@gmail.com
Where servomechanism is used?
Is MEN and RCD related to each other ?? IF yes then how??
