【Electrical Version】Daily Question 20180428
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How is the primary side voltage of a power transformer determined? Answer: Primary side voltage: ① When the power transformer is connected directly to a generator, its primary side rated voltage is the same as that of the generator, which is 5% higher than the rated voltage of the corresponding circuit. ② When the transformer is not connected to a generator but is instead part of a circuit, it can be considered as a load connected to that circuit; therefore, its primary side rated voltage should be the same as the rated voltage of that circuit
Primary side voltage: ① When the power transformer is connected directly to a generator, its primary side rated voltage is the same as that of the generator, i.e., 5% higher than the rated voltage of the corresponding circuit. ② When the transformer is not connected to a generator but is instead part of a circuit, it can be regarded as an electrical device in that circuit; therefore, its primary side rated voltage should be the same as the rated voltage of that circuit
①① When the power transformer is connected directly to the generator, its primary side rated voltage is the same as the generator’s rated voltage, which is 5% higher than the rated voltage of the corresponding circuit. ② When the transformer is not connected to a generator but is instead part of a circuit, it can be regarded as an electrical device within that circuit; therefore, its primary side rated voltage should be the same as the rated voltage of that circuit
Transformers are designed based on the rated voltage of the circuit. Whether the transformer is located at the beginning, in the middle, or at the end of the circuit, the actual voltage on its primary side varies. Therefore, transformers are equipped with tap changers, which allow the number of turns in the windings to be adjusted in order to maintain a constant output voltage.
Primary side voltage: ① When a power transformer is connected directly to a generator, its primary side rated voltage is the same as that of the generator, that is, 5% higher than the rated voltage of the corresponding grade of transmission lines. ②When the transformer is not connected to a generator but is instead on the line, it can be regarded as an electrical device on that line; therefore, its primary side rated voltage should be the same as the line’s rated voltage.
Primary side voltage: ① When the power transformer is connected directly to a generator, its primary side rated voltage is the same as that of the generator, i.e., 5% higher than the rated voltage of the corresponding circuit. ② When the transformer is not connected to a generator but is instead part of a circuit, it can be regarded as an electrical device in that circuit; therefore, its primary side rated voltage should be the same as the rated voltage of that circuit
Answer: Primary side voltage: ① When the power transformer is connected directly to a generator, its primary side rated voltage is the same as that of the generator, which is 5% higher than the rated voltage of the corresponding circuit. ② When the transformer is not connected to a generator but is instead part of a circuit, it can be considered as a load connected to that circuit; therefore, its primary side rated voltage should be the same as the rated voltage of that circuit
Primary side voltage: ① When the power transformer is connected directly to a generator, its primary side rated voltage is the same as that of the generator, i.e., 5% higher than the rated voltage of the corresponding circuit. ② When the transformer is not connected to a generator but is instead part of a circuit, it can be regarded as an electrical device within that circuit; therefore, its primary side rated voltage should be the same as the rated voltage of that circuit
Primary side voltage: ① When the power transformer is connected directly to a generator, its primary side rated voltage is the same as that of the generator, i.e., 5% higher than the rated voltage of the corresponding circuit. ② When the transformer is not connected to a generator but is instead part of a circuit, it can be regarded as an electrical device within that circuit; therefore, its primary side rated voltage should be the same as the rated voltage of that circuit
When a transformer is connected to a direct generator, the voltage on the primary side of the transformer is equal to the rated voltage of the generator, usually about 5% higher than the rated voltage of the high-voltage line.