Allen-Bradley 193-1EFMZ Overload Relay Industrial Grade

Allen-Bradley 193-1EFMZ is an industrial-grade E100 electronic overload relay rated for 120–600 A, designed to protect motors in demanding automation environments when used with compatible Allen-Bradley contactors. It monitors current via an external current transformer (CT) mounting configuration, enabling motor protection in panels and control enclosures that use external CTs. As part of the E100 family (193/592 IEC/NEMA), the 193-1EFMZ offers configurable trip classes to match protection requirements; typical trip-class options include 10, 15, 20, or 30. This model is compatible with Allen-Bradley 193- and 592-series motor starters, making it suitable for integration in standard industrial motor control schemes. With a 120–600 A current range, the relay is suited for medium- to high-amperage motors and should be selected based on the motor's full-load amperes to ensure proper protection. In practice, it serves as a solid-state overload protection relay that interfaces with the contactor to interrupt the control circuit should motor current exceed the preset threshold, helping prevent overheating and damage during overload conditions.