Electrician Red Seal · Question
In a three-point control circuit for a motor, what is the primary purpose of the 'holding contacts' (auxiliary contact) on the motor starter?
Holding contacts, often an auxiliary contact on the main contactor, maintain the control circuit's integrity once the momentary START button is pressed and rele
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Question: In a three-point control circuit for a motor, what is the primary purpose of the 'holding contacts' (auxiliary contact) on the motor starter?
Answer options:
- To provide overload protection to the motor. ✅ To maintain the motor in an 'ON' state after the 'START' button is released.
- To disconnect power during a short circuit.
- To allow remote control of the motor speed.
Correct answer: To maintain the motor in an 'ON' state after the 'START' button is released.
Explanation: Holding contacts, often an auxiliary contact on the main contactor, maintain the control circuit's integrity once the momentary START button is pressed and released. This ensures the motor continues to run until the STOP button is pressed or an overload occurs.
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