🔍 Key Concepts

• Trace how the TR (time delay) coil is wired in the control circuit relative to the M (main contactor) coil and the 1A (accelerating) coil. • Think about how a primary-resistor or reduced-voltage starter works: when are the resistors in the circuit, and when are they bypassed? • Notice which contact (labeled TR or 1A) must change state after a delay, and what that does to the current path through the starting resistors.

💭 Think About

• Follow the sequence: you press Start → which coil energizes first, and what path does current take to the motor? • After the TR coil times out and its contact changes, which device (M, TR, or 1A) is affected, and how does that change the motor’s supply voltage? • Compare choices A and D: in each, are the starting resistors in the circuit during acceleration or after the motor is already at speed? Which matches how this circuit actually behaves?

✅ Before You Answer

• Verify whether the TR contact in the control circuit is in series with the 1A coil (so that 1A operates only after a delay). • Check in the power diagram whether 1A contacts are associated with shorting out or bypassing the resistors in each line, or with inserting them. • Confirm the correct sequence: Start → motor at reduced/full voltage → time delay expires → resistors inserted or removed. Make sure your chosen option matches this sequence.