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explain why tap changer is always connected to high voltage
winding side of the transformer.
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Answer Posted / mithun
Actually a tap changer is used to get variable voltages. It
is just an air break switch. If it is connected in high
current side (LV side), there is more chances to occur
heavy sparks while in changing the taps, means while
changing the switch positions. In order to avoid that heavy
sparks in high current side, tapings are provided on low
current (HV side).
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