This 200A automatic transfer switch is designed for use with single-phase standby generators that use an Evolution or Power Zone 200 controller. It automatically transfers electrical loads from utility power to generator power when an outage occurs and returns them when utility service is restored. This hardened transfer switch control has been purposely designed to combat harmful utility power disturbances such as brownouts, while ensuring reliable automatic transfer performance. The unit features a NEMA 3R enclosure for indoor or outdoor installation and is built for long-term reliability. This non-service entrance rated model does not include an integrated surge protection device.