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SGL18
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I don't even know where to start! anyone got any ideas?
A transformer having a 2:1 turns ratio is considered to have a primary resistance and reactance of 1ohm and 2ohm respectively, and a secondary resistance and inductance of 1ohm and 6.37mH respectively. Magnetising current for this transformer is negligible. A 50Hz supply is connected such that a primary current of 10A flows when a load of 60ohm is connected. Determine the primary referred total winding resistance and reactance, and the load and supply voltages. (Hint: Remember that the voltage angles will depend on what you take as your reference.) Determine the magnitude of the supply voltage required to establish the same load voltage if the transformer were regarded as ideal, and thereby determine the percentage increase in voltage supplied to account for the transformer losses.
[5ohm; 10ohm; 1.2kV/angle 0; 2.452kV /angle 2.34; 2.4kV; 2.2%]
A transformer having a 2:1 turns ratio is considered to have a primary resistance and reactance of 1ohm and 2ohm respectively, and a secondary resistance and inductance of 1ohm and 6.37mH respectively. Magnetising current for this transformer is negligible. A 50Hz supply is connected such that a primary current of 10A flows when a load of 60ohm is connected. Determine the primary referred total winding resistance and reactance, and the load and supply voltages. (Hint: Remember that the voltage angles will depend on what you take as your reference.) Determine the magnitude of the supply voltage required to establish the same load voltage if the transformer were regarded as ideal, and thereby determine the percentage increase in voltage supplied to account for the transformer losses.
[5ohm; 10ohm; 1.2kV/angle 0; 2.452kV /angle 2.34; 2.4kV; 2.2%]
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