A 250 kVA transformer has a primary winding resistance of 0.25Ω and a secondary winding resistanceof 0.0025 Ω. The iron loss is 2.5 KW and the primary and secondary voltages are 25 kV and 250 V respectively. If the power factor of the load is 0.7, determine the efficiency of the transformer (i) one forth load, and (ii) three forth load?
A 250 kVA transformer has a primary winding resistance of 0.25Ω and a secondary winding resistanceof 0.0025 Ω. The iron loss is 2.5 KW and the primary and secondary voltages are 25 kV and 250 V respectively. If the power factor of the load is 0.7, determine the efficiency of the transformer (i) one forth load, and (ii) three forth load?
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1. A 250 kVA transformer has a primary winding resistance of 0.25Ω and a secondary winding resistanceof 0.0025 Ω. The iron loss is 2.5 KW and the primary and secondary voltages are 25 kV and 250 V respectively. If the power factor of the load is 0.7, determine the efficiency of the transformer (i) one forth load, and (ii) three forth load?
2. Identify the DC motor that can be used in portable drilling machine. Also, explain the requirement of a
DC Motor to be selected as a drive motor for portable drilling machine?
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