Motor Starters
- Thread starter kfenn
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- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: Motor Starters
All of them. IMV, if it has a simple on/off switch and some type of protection against motor overload, then it has a ?motor starter.? Can you be more specific with your question?
All of them. IMV, if it has a simple on/off switch and some type of protection against motor overload, then it has a ?motor starter.? Can you be more specific with your question?
- Location
- Mission Viejo, CA
- Occupation
- Professional Electrical Engineer
Re: Motor Starters
Virtually any motor is permitted to use a starter. I believe you are asking when one is required. Technically, a motor is required to have a "controller" and over-current protection. A "starter" is simply one of the options for the "controller" function. Properly sized and applied circuit breakers and molded case switches may also serve as controllers.
Article 430 Part VII especially Sections 430.81 - 83 address the various options. Your specific question is most likely answered indirectly in 430.83(C)
Virtually any motor is permitted to use a starter. I believe you are asking when one is required. Technically, a motor is required to have a "controller" and over-current protection. A "starter" is simply one of the options for the "controller" function. Properly sized and applied circuit breakers and molded case switches may also serve as controllers.
Article 430 Part VII especially Sections 430.81 - 83 address the various options. Your specific question is most likely answered indirectly in 430.83(C)
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: Motor Starters
Every motor is required to have a controller, overload protection and a disconnecting means. Controller is the correct term as used in Art 430, a starter is typically a controller. Generally when you get above a certain amperage then a controller is used, the amperage depends on the voltage, but at 120/240 probably above 2 hp. It really depends on how you are controlling the motor.
Every motor is required to have a controller, overload protection and a disconnecting means. Controller is the correct term as used in Art 430, a starter is typically a controller. Generally when you get above a certain amperage then a controller is used, the amperage depends on the voltage, but at 120/240 probably above 2 hp. It really depends on how you are controlling the motor.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Re: Motor Starters
Don't know if it is part of NEMA ICS 2, but most US manufacturers call a device that contains both the motor controller and the overload protective device a starter (AB Bulletin 509 vs AB Bulletin 500).
A manual controller is often called a motor switch (Square D Class 2510 Type K) and a magnetic controller only is called a contactor (Square D Class 8502).
Don't know if it is part of NEMA ICS 2, but most US manufacturers call a device that contains both the motor controller and the overload protective device a starter (AB Bulletin 509 vs AB Bulletin 500).
A manual controller is often called a motor switch (Square D Class 2510 Type K) and a magnetic controller only is called a contactor (Square D Class 8502).
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