In the illustration shown, what would be the...

Question 1 of 270705eccefa4bacbc34ba4d4832f

In the illustration shown, what would be the functional name for the coil represented as 'R'? See illustration EL-0012.

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Question 1 of 27070

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In the illustration shown, what would be the functional name for the coil represented as 'R'? See illustration EL-0012.

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🔍 Key Concepts

• Trace how the R coil affects the power circuit in the lower half of the diagram. • Compare the functions of contactors 1S, 2S, and R in both the control and power portions. • Think about how starting resistors or reduced‑voltage steps are usually controlled in three‑phase motor starters.

💭 Think About

• When coil R is energized, what changes electrically for the motor compared with when 1S or 2S are energized? • Which labeled elements (100%, 80%, 65%, 50%, 0%) are being connected or bypassed by the device controlled by R? • In standard motor control terminology, what is the functional name of a contactor whose job is to insert or cut out those elements during starting?

✅ Before You Answer

• Verify which contact’s symbol R appears next to in the power circuit (not just in the control circuit). • Check whether R ever changes the motor’s direction of rotation—this will help you evaluate choice D. • Confirm whether R is used only during starting or also in normal running; this helps distinguish between a run contactor and a coil that controls starting resistors.