Which of the following pictures shown in the...

Question 1 / 270705eccefa4bacbc34ba4d4810c

Question 1 of 270705eccefa4bacbc34ba4d4810c

Which of the following pictures shown in the illustration is a control transformer, usually used to step down line voltage for supplying reduced voltage control circuits? Illustration EL-0177

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Question 1 of 27070

Which of the following pictures shown in the illustration is a control transformer, usually used to step down line voltage for supplying reduced voltage control circuits? Illustration EL-0177

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Control transformer purpose – used to step down higher line voltage (e.g., 480/240 V) to a lower control voltage (e.g., 120 V) for motor starters and control circuits • Physical appearance of a control transformer – laminated iron core, clearly marked primary and secondary terminals, often multiple primary taps for different line voltages • Differences between a lighting ballast, a current transformer, a power transformer, and a control transformer

💭 Think About

• Look at each device and ask: which one is designed to have both a high‑voltage primary and a low‑voltage secondary clearly brought out to screw terminals for control wiring? • Which picture shows a transformer that would normally be mounted inside a control panel, with nameplate markings for several possible line voltages and a single lower control voltage? • Which items are specialized for other purposes, such as sensing current or operating fluorescent lamps, rather than directly supplying control circuits?

✅ Before You Answer

• Identify which picture shows primary and secondary terminal markings for different voltages on its nameplate or label • Eliminate any device that is clearly a current transformer (ring or window type for measuring current only) or a lighting ballast (long, narrow case for fluorescent lamps) • Confirm that the remaining choice is a single‑phase control transformer intended for reduced‑voltage control circuits, not a large multi‑phase power transformer

Question 1 of 27070

Which of the following pictures shown in the illustration is a control transformer, usually used to step down line voltage for supplying reduced voltage control circuits? Illustration EL-0177

Question 1 / 270705eccefa4bacbc34ba4d4810c

Question 1 of 270705eccefa4bacbc34ba4d4810c

Which of the following pictures shown in the illustration is a control transformer, usually used to step down line voltage for supplying reduced voltage control circuits? Illustration EL-0177

Back

Question 1 of 27070

Which of the following pictures shown in the illustration is a control transformer, usually used to step down line voltage for supplying reduced voltage control circuits? Illustration EL-0177

If the question has a related picture, it will appear here.