Given a 120 volt secondary output: At full load and 2% impedance, a transformer will supply _____ volts (x1 to neutral reading).

Enhance your skills with the Transformers Test 1. Utilize flashcards and multiple choice questions, each accompanied by hints and explanations. Ensure you're fully prepared for your exam!

Multiple Choice

Given a 120 volt secondary output: At full load and 2% impedance, a transformer will supply _____ volts (x1 to neutral reading).

Explanation:
The voltage drop under load is determined by the transformer’s impedance expressed as a percentage of the rated voltage. With a 120 V secondary and 2% impedance at full load, the secondary voltage sags by 2% of 120 V. Compute the drop: 120 × 0.02 = 2.4 V. Subtract from the nominal: 120 − 2.4 = 117.6 V. So the reading from x1 to neutral under full load is 117.6 V. The other options would reflect smaller drops and do not match a 2% impedance.

The voltage drop under load is determined by the transformer’s impedance expressed as a percentage of the rated voltage. With a 120 V secondary and 2% impedance at full load, the secondary voltage sags by 2% of 120 V.

Compute the drop: 120 × 0.02 = 2.4 V. Subtract from the nominal: 120 − 2.4 = 117.6 V.

So the reading from x1 to neutral under full load is 117.6 V. The other options would reflect smaller drops and do not match a 2% impedance.

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