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IEC Manual Motor Starter Protectors Frequently Asked Questions AutomationDirect Logo


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  1. What are Auxiliary Contacts used for?
  2. Is the phase loss protection electronic?
  3. What is the purpose of the Shunt Trip?
  4. What is an Undervoltage Trip accessory used for?
  5. Is it necessary to install a shunt trip or undervoltage trip in the Manual Motor Starter/ Protector?
  6. What is the overload trip curve for the Manual Motor Starter/ Protector?
  7. What is the short circuit trip rating for the Manual Motor Starter / Protector?
  8. Can I use the Manual Motor Starter/ Protector on a single phase motor?
  9. Can the Manual Motor Starter /Protector be used alone or only with a contactor?
  10. What agency approvals do the MS25 series devices have?
  11. What is the impact resistance of the Manual Motor Starter/ Protectors at 20 ms duration?
  12. What is the ambient temperature of the Manual Motor Starter/ Protectors?
  13. What are the climate classifications of the Manual Motor Starter/ Protectors?
  14. What is the protection degree of the Manual Motor Starter/ Protector?
  15. Are the Manual Motor Starter/ Protectors Din Rail mountable?
  16. Does the shunt trip have auto reset capabilities?
  17. How does the Manual Motor Starter/Protector & the Contactor transfer current from one to the other?
  18. Do you have a AWG to Metric conversion chart?
  19. I am trying to use a starter for a 3hp motor on a 120 vac 15 amp circuit. It keeps tripping out. What is going on?
  20. What are the sizing guidelines for starters and contactors?
  21. I need to start and stop a motor; I am confused on what the difference between an MSP, starter, and contactor are?
  22. What are the coordination levels used to classify starters and protectors?
  23. What are the differences between the uses of MSPs in USA versus their uses internationally?
  24. What are the NEC references for a motor circuit?
  25. NEMA or IEC style starters and protectors?
  26. What is a trip class?
  27. What is the withstand rating?
  28. What is breaking capacity/interrupting rating?
  29. What is fault current?
  30. What is an Overload condition?
  31. What is a short circuit fault?
  32. What is the minimum cycle time for a starter?
  33. Do you sell covers for the MSP25 series motor starter protectors?
  34. Can I use a motor starter protector with Variable speed drives and inverters?
  35. Can the starters be used for dc motors?
  36. Does Automationdirect.com sell a Manual Motor Starter Protector that is Type E?


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