Allen-Bradley 592-TPD630-A Thermal Overload Relay

Allen-Bradley 592-TPD630-A is a NEMA eutectic-alloy thermal overload relay from Rockwell Automation’s Bulletin 592 family. It is a manual-reset overload relay in an open, three-pole configuration with a current rating of 250 to 630 amperes, designed to protect large three-phase motors by sensing temperature rise with a eutectic alloy element and tripping on overload. The model family denotes a high-current, open-type device suitable for panel-mount installations in motor control circuits; after a trip, it requires a manual reset prior to re-energizing the circuit. This relay is intended for industrial motor control panels where thermal protection of high-current motors is needed and where robust, resettable protection is specified for preventing motor damage due to overload conditions.