Cummins Generator Technologies manufactures Three Phase RMS Power Magnet Generator, MX321. Cummins Generator Technologies offers various types of AVR generators. This Three Phase RMS Power Magnet Generator has 0. 5 percent voltage regulation. It is provided with built in over-voltage protection and optional short circuit current level adjustment. This Power Magnet Generator is an isolated power source and the RMS sensing in the product makes it an ideal arrangement for supplying the non- linear loads such as supplies for computers or variable speed motors.