Transformers Open circuit test on transformers is conducted to determine hysteresis losses copper losses eddy current losses core losses hysteresis losses copper losses eddy current losses core losses ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural air cooling is generally restricted for transformers up to 50 MVA 5 MVA 1.5 MVA 15 MVA 50 MVA 5 MVA 1.5 MVA 15 MVA ANSWER DOWNLOAD EXAMIANS APP
Transformers The hum in a transformer is mainly attributed to magnetostriction oil in the transformer load changes mechanical vibrations magnetostriction oil in the transformer load changes mechanical vibrations ANSWER DOWNLOAD EXAMIANS APP
Transformers In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of less than 15 A 15 A more than 15 A None of these less than 15 A 15 A more than 15 A None of these ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because iron loss is increased considerably copper loss becomes high in proportion to the output voltage drop both in primary and secondary becomes large secondary output is much less as compared to primary input iron loss is increased considerably copper loss becomes high in proportion to the output voltage drop both in primary and secondary becomes large secondary output is much less as compared to primary input ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer routine efficiency depends upon Supply frequency Load current Power factor of load Both power factor and load current Supply frequency Load current Power factor of load Both power factor and load current ANSWER DOWNLOAD EXAMIANS APP
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