Westinghouse 1875277A Overload Protection Relay

The Westinghouse 1875277A is an electromechanical Y4 overload protection relay designed to protect motors and power circuits from sustained overcurrent. It monitors current flow and trips to prevent motor overheating, with panel or starter mounting suitable for use in motor control centers, switchgear, and power distribution systems. As an OEM replacement component, it is compatible with Westinghouse motor starters and control equipment and provides reliable overload sensing for industrial and commercial electrical applications; common replacements include Siemens 3RU Overload Relay, Schneider Electric LRD Thermal Overload Relay, and ABB TA25DU Overload Relay.