MEEN 225 Lecture Notes - Lecture 16: Equivalent Circuit
8 Jan 2018
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Document Summary
It is the difference in secondary terminal voltage between no-load and full load conditions. It is expressed in percentage and is given by:- It is good practice to have vr as small as possible. In practical transformer, when a load is connected to the transformer, the secondary voltage (i. e. load voltage) changes because of voltage drop in the internal impedance. At no-load: there is no load connected to the transformer. Therefore, there is no current flow through the transformer and there will be no voltage drops across the internal impedance. Therefore, the voltage regulation: equivalent circuit referred to primary, equivalent circuit referred to secondary. Equipment is desired to operate at a high efficiency. Can be achieved by using a bank of three 1 transformers connected together to form a 3- phase transformer. The windings may be connected in a variety of ways: o delta-delta: delta-wye, wye-delta, wye-wye.
