Can a Smaller Horsepower Motor Be Used with a Larger Soft Starter?
Resolution:
Yes. In most applications, a larger Altistart soft starter can be used to control a motor with a lower horsepower (HP) and full-load current (FLA) rating.
To ensure proper motor operation and protection, the motor's full-load current (FLA) must be configured correctly in the soft starter settings. This allows the soft starter to provide accurate motor control and overload protection.
The main consideration is the overload protection adjustment range of the soft starter. If the motor's FLA is below the minimum adjustable overload setting, the soft starter may not provide adequate motor protection. In these cases, an external overload relay should be installed and set according to the motor nameplate current.
Key Points
- A larger soft starter can typically operate a smaller motor.
- Configure the motor FLA correctly in the soft starter.
- Verify that the soft starter's overload setting range includes the motor's FLA.
- If the motor FLA is below the adjustable range, use an external overload relay for proper protection.
If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:
Frequently Asked Questions - Schneider Electric (se.com)
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