When a two-winding transformer is reconnected as an auto-transformer, its kVA rating can be increased. The new rating is limited by the current-carrying capacity of the windings when configured for auto-transformation. For a 220V/ 330V auto-transformer derived from a 220V/ 110V two-winding transformer, the 110V winding acts as the series winding and its current capacity limits the maximum auto-transformer rating.
A two-winding 220 V/110 V, 1.5 kVA transformer is reconnected as a 220 V/330 V auto- transformer. It is rerated as
Asked in GS&EI ElectEngg 14 2024 1601 2025 · Topic: Electric Current (Ohm's Law, resistance, resistivity, and conductivity)
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