how can we find a burden of potential transformer? what
does it effects? how can we calculate rated load of it?
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 ? | 0 Yes | 0 No |
Post New Answer View All Answers
from where the self excitrd induction generator get the power?why is the voltage regulation is poor of seig?
What is the main use of rotary phase converter ?
Draw the wave shape of armature current in a generator subjected to a sudden three phase short- circuit at its terminals. Define various reactance of generator from this wave shape.
What will be the voltage impact on secondary side of two transformers with different vector groups when both voltages are compared.
we use capister for power factor. when we use capaciter in dg circuit than defect dg. can we use capaciter bank for dg circuit
IN electrical field, WHAT ALL THINGS THE CUSTOMER WILL ASK WHILE ORDERING FOR LT PANEL (ALL TYPES OF LOW TENSION PANEL)
What is core CT & it's function?
why does a dc machine has high efficiency while working as a generator than as a motor ..
what happen when power factor of 2 parallely operated transformer become equle?
how can we phase identification in a distribution line,how we recognise that which phase is coming for a house hold connection.help me............
How do i carry out or know the vector group of a Dyn1 and Dyn5 transformer
Why do we avoid electrical conduits in floors at apartments?
What is capacitance?
Why derating factor os applied on Cables?
How halogen & merquery lamp works.