What is the difference between motor frame 449T and 449TS?

The primary difference between motor frame 449T and 449TS lies in their design and application. The "S" in 449TS typically indicates a special feature or modification, such as enhanced cooling or a specific mounting configuration. Additionally, the 449TS may be optimized for certain operational conditions or efficiency requirements, whereas the 449T is a standard frame without those enhancements. Always refer to the manufacturer's specifications for detailed differences.