Question

A 20-kva transformer has a maximum efficiency of 98% when delivering 3 4 full load at unity power factor. If during the day, the transformer is loaded as follows: 12hours noload 6 hours 12kw, 0.8p.F 6 hours 20kw, 1.0p.F . calculate the all day efficiency of the transformer

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A 20-kva transformer has a maximum efficiency of 98% when delivering 3 4 full load at unity power factor. If during the day, the transformer is loaded as follows: 12hours noload 6 hours 12kw, 0.8p.F 6 hours 20kw, 1.0p.F . calculate the all day efficiency of the transformer

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