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A 2000-VA 230/115-V transformer has been tested to determine its equivalent circuit. The results of the tests are shown below.
Open-circuit test Short-circuit testVOC = 230 V VSC = 13.2 VIOC = 0.45 A ISC = 6.0 A POC = 30 W PSC = 20.1 W
All data given were taken from the primary side of the transformer.
(a) Find the equivalent circuit of this transformer referred to the low-voltage side of the transformer.
(b) Find the transformer's voltage regulation at rated conditions and (1) 0.8 PF lagging, (2) 1.0 PF, (3) 0.8 PF leading.
(c) Determine the transformer's efficiency at rated conditions and 0.8 PF lagging.
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