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Why tap changer is connected on the HV side?

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Question added by Ahmed Fathi , Senior Electrical Engineer , Al Fawzani for trading and contracting LTD. company
Date Posted: 2017/10/24
Deleted user
by Deleted user

The tap changer is connected to HV Side to adjust the coils depending to the primary instantaneous variable voltage for target the secondary voltage be stable and constant.

Karim Hassan
by Karim Hassan , Senior Maintenance Engineer , Alfanar Engineering Service

this not a condition some times tap changer connected on H.V side and other times connected to the L.V side according to the design it defers as i seen, new Alstom transformers used in big plants the tap changer is on the L.V side (230KV/34.8KV).

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