What is the difference between integral and fractional horsepower starters?

[lavalin]

I am trying to purchase a starter for a very small single phase motor (.14kW). I have come across some schneider starters, but I am unsure what the difference is between these two:

http://www.schneider-electric.us/pr...itches/type-f-fractional-horsepower-starters/

and

http://www.schneider-electric.us/pr...es/type-m-and-t-integral-horsepower-starters/

What do they mean by the word "integral"?

 

[Bob S]

Integral HP (horsepower) motors have more than one HP. Fractional HP motors have less than one HP.
Bob S

 

[oswaler]

The difference between integral and fractional horsepower starters lies in the size and power capacity of the motor they are designed for. Integral horsepower starters are meant for larger motors with higher power ratings, typically above 1 horsepower. On the other hand, fractional horsepower starters are designed for smaller motors with power ratings below 1 horsepower.

In your case, since you are purchasing a starter for a very small single phase motor with a power rating of 0.14kW, the fractional horsepower starter (Type F) would be the appropriate choice. The integral horsepower starter (Type M and T) would be more suitable for larger motors with power ratings above 1 horsepower.

The term "integral" refers to the fact that the starter is an integral part of the motor's overall power system, providing the necessary power to start and operate the motor. This is in contrast to fractional horsepower starters, which are typically used for smaller, standalone systems.

It is important to choose the correct starter for your motor to ensure safe and efficient operation. I would recommend consulting with a professional or referring to the motor's specifications to determine the appropriate starter for your specific motor.