Electronic overload relay is combined with supply contactor has electronic components mounted on common PCB

摘要

The relay (1) in a case (3) housing CTs, is combined with a contactor (2). The relay consists of a current monitor with a potentiometer setting the overload level, contactor control and auxiliary relays to close and trip the contactor and a contactor reset button. A bus coupler unit links the contactor control relay to a wiring bus (11) to provide for remote resetting and status information. All relay components are mounted on a common PCB