A single-phase, 240 V AC control circuit uses a control transformer with a 600 V primary and a 120 V secondary. If the primary circuit is protected by a 1 A fuse, and the transformer has a VA rating of 200 VA, what is the maximum continuous current the technician should expect on the secondary side if the transformer is fully loaded?

Question: A single-phase, 240 V AC control circuit uses a control transformer with a 600 V primary and a 120 V secondary. If the primary circuit is protected by a 1 A fuse, and the transformer has a VA rating of 200 VA, what is the maximum continuous current the technician should expect on the secondary side if the transformer is fully loaded?

Answer options:

• 1.67 A. ✅ 0.33 A.
• 0.83 A.
• 1.2 A.

Correct answer: 0.33 A.

Explanation: To calculate the maximum continuous current on the secondary side, use the formula I = VA / V. So, 200 VA / 120 V = 1.67 A. The fuse rating on the primary side (1 A) and the primary voltage (600 V) are distractors for this specific question about secondary current at full load.