[thamee97]

Our utility specifications calls for VTs of burden 100VA. As the connected burden is low and due to switchgear compact designs (for indoor applications), manufacturers are offering VT of burden 30VA or less.
Our utility specifications calls for VTs of burden 100VA. As the connected burden is low and due to switchgear compact designs (for indoor applications), manufacturers are offering VT of burden 30VA or less. We understand that measuring class VT with higher burden will lead to less accuracy while CVTs of higher burden will lead to ferroresonance problems.
Is there any advantage to have VTs of higher burden (say 100VA) while connected burden is very less (say 1-2VA) especially for protection applications and inductive VT designs.

Regards,

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[Hamid]

According to IEC 186 a voltage transformer is required to fulfill its accuracy class for burdens between 25 and 100% of rated burden. A turn’s correction is mostly selected to give a positive error + max at a burden of 25% of rated burden and – max at a burden Of 100% of rated burden. The values are rated values per phase for a three-phase set. The Standard values on burden is given at cos

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