Schweitzer Engineering Laboratories 751A61ABA1A72850200 Motor Protection Relay

SEL-751A Feeder Protection Relay, order 751A61ABA1A72850200, is a microprocessor-based protective relay from Schweitzer Engineering Laboratories engineered to safeguard feeders and motor circuits with fast, selective protection and integrated control functions. It delivers robust overcurrent protection through instantaneous and time-overcurrent elements, along with voltage and frequency monitoring to detect abnormal conditions, while maintaining coordination with upstream and downstream protection devices. An optional arc-flash protection feature reduces incident energy exposure in risky environments, and when enabled it integrates into the protection scheme without requiring a separate device. The unit supports a fiber-optic serial port for engineering access, enabling secure configuration and data exchange in challenging installations. UL Class I, Division 2 certification is available for use in hazardous and potentially explosive environments, further expanding where it can be deployed. Typical applications include protection and control of feeder circuits feeding motors or other large loads in industrial facilities and substations, where fast fault clearance and precise fault localization are critical, and it is designed to be compatible with SEL protection and control ecosystems for centralized monitoring and plug-and-play integration.