How Can I Wire a Start/Stop Button for a Motor Starter with Multiple Contactors?

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SUMMARY

The discussion focuses on wiring a start/stop button for a motor starter controlling a conveyor system using four magnetic contactors and an overload relay. The user is facing challenges with a push button that requires continuous pressure to keep the conveyor running and seeks a solution for a separate start and stop button setup. The motor operates on a three-phase system with a wye connection, and the user is uncertain about the necessity of a neutral wire in the circuit. The discussion highlights the need for a proper wiring configuration to meet the requirements set by the user's supervisor.

PREREQUISITES
  • Understanding of three-phase motor systems
  • Knowledge of magnetic contactors and overload relays
  • Familiarity with wye connection wiring
  • Basic electrical circuit design principles
NEXT STEPS
  • Research wiring diagrams for start/stop button configurations for motor starters
  • Learn about the role of neutral wires in three-phase motor systems
  • Explore the use of relay logic for controlling multiple contactors
  • Investigate safety standards and best practices for motor control circuits
USEFUL FOR

Electrical engineers, technicians working with conveyor systems, and anyone involved in motor control circuit design will benefit from this discussion.

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hello guys...

im now doing motor starter for conveyor..so i decide to use 4 magnetic contactor connected with overload relay each..1 contactor for main supply and i make some looping for other 3 contactor each contactor connected to one conveyor... it is 3 phase and 2 poles overload relay..im having some problem on the on/off switch button..right now if I am using push button..so everytime i want to on the conveyor i have to hold it to make sure its keep running..my problem is my boss want me to use different on/off button which mean 1 button on and 1 button off...so i can't figure out how the connection...plus i add one master switch...how can i make it happen?? i try to google the solution but still can't find any solution...so anyone reading this hope can help me..thank you
 
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This is the circuit to use.
If 120 volt is removed and then reapplied, the conveyor doesn't start running.
 

Attachments

  • Start stop Relay001.jpg
    Start stop Relay001.jpg
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the motor using wye connection...from what i learned wye connection have neutral wire...so i have to use neutral wire too? because without the wire the conveyor still moving..
 

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