Allen-Bradley 809-A22E Instantaneous Trip Relay

The Allen-Bradley 809-A22E Instantaneous Trip Relay is a heavy‑duty electronic current relay designed to provide instantaneous overcurrent protection for large industrial motors, feeders, and power circuits. It continuously monitors circuit current and trips immediately when the adjustable current threshold is exceeded, helping protect motors and electrical equipment from severe overload and short‑circuit conditions. Commonly installed in motor control centers (MCCs), conveyor systems, crushers, compressors, pumps, mining equipment, and heavy industrial process machinery where high‑current motor protection is essential. This Bulletin 809 device supports AC and DC motor circuits with a maximum system voltage of 600 VAC / 600 VDC, and a maximum continuous coil current of 162 A. The AC tripping current can be set from 85 to 244 A, while the DC tripping current range is 76 to 229 A, and it operates at 25, 50, or 60 Hz. The relay features an open enclosure, panel‑mounting, and a contact configuration of 1 normally open and 1 normally closed with automatic reset, rated NEMA B600. It resets at 70–85% of the trip setting (AC) or 62–82% of the trip setting (DC). Certifications include UL Listed and CSA Certified (series dependent). Key features include adjustable trip current, automatic reset contacts, magnetic current sensing, rapid fault response, and heavy‑duty construction for large‑motor protection. Common replacements include 809‑A21E, 809‑A23E, and 809‑B22E.