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Why tappings are always provided in HV winding of power transformers?
Wiki User
∙ 10y ago
in hv side, current will be less; so if we vary the
rheostate, than thetre is less arcing with respect to lv
side, so we always put the tap changer in hv side.
Nellie Bauch
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The transformer winding is a short circuit to DC. But for AC, the impedance of thecoiled winding and the magnetic coupling to another winding have the same effecton AC as resistance has in a DC circuit. That's why transformers don't work withDC, and are always operated with AC.AnswerIf you are querying why there are no short circuits between individual turns, it is because the windings are insulated not bare.
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It doesn't really matter which way around you use a transformer, the primary winding is ALWAYS whichever winding you connect to the supply, and the secondary winding is ALWAYS whichever winding you connect to the load. For either connection, the turns ratio will ALWAYS equal the voltage ratio for an ideal transformer (or close enough for a real transformer).
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