how can we find a burden of potential transformer? what
does it effects? how can we calculate rated load of it?
- 4 Answers
- 32664 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
why should the lowest unit of a testing transformer ( cascaded transformer ) have higher power rating??
in dc shunt motor if field winding is shorted then
Dear Sir/Madam, I have one questions we have three steam turbines and one Gas turbine and our industry linked with the public network, we have protection system one of the protection is reverse power we can export just four MW only i would like to ask about how to calculate the reverse power. Thank you in advance best regards
How to choose the vector group for the step up and step down transformers??? Tell me the which vector group is suitable for step up and step down transformers and whats the reason to choose and whats the benefits???
difference between main metering kiosk and check metering kiosk
What do you mean by Stimulastion Test in Diesel Genarator / Why & when it's conducted ?
Why an ac solenoid valve attract the plunger even though we interchanges the terminal? Will the poles changes?
Differentiate between digital phase converter and ordinary phase converter.
1. If 8.35%Z means the percentage impedance of 132kV-line from power company, we will like to confirm its base capacity?
What are the characteristics of negative feedback?
we all know voltage is a force(emf), and the force always devides if 2 or more than2 loads are there but why does the voltage remains same is parallel, it must devide na ???
HOW TO CALCULATE THE HEAT AND LOAD OF LT-SUBSTATION WHICH CONTAINS 2*1MVA TRANSFORMERS,LT SWITCH BOARD,MLDB,ACB,BUSBAR,ETC...?
What is the unit of magnetic flux density?
On what basis the the size of Lightning arrester for buildings are selected ?
how to read idmt curva
