The LV847052 is a 250 A sensor plug for MasterPact MTZ1 and MTZ2 air circuit breakers equipped with a MicroLogic X control unit. It is the current-sensing interface between the breaker poles and the trip unit — the component that measures load current and feeds it to the MicroLogic X for protection curve execution, metering, and alarm functions.
What the 250 A rating means for fit
The 250 A rating is the sensor plug's nominal current — it matches the breaker frame's continuous current capacity. A sensor plug with a lower rating than the breaker frame will thermally limit the assembly; a higher rating will under-sense and degrade protection accuracy. On a MasterPact MTZ1 or MTZ2, the sensor plug is sized to the breaker's continuous amp rating, so LV847052 is the correct plug for a 250 A frame. This is not a field-adjustable parameter: the plug physically keys the trip unit to the breaker's current range.
The sensor plug installs inside the MasterPact MTZ1 or MTZ2 breaker — it is not a panel-mount accessory. The MicroLogic X control unit snaps onto the plug, and the plug's current transformers encircle the breaker's main bus bars. No additional DIN-rail space or wiring is required; the plug is captive within the breaker cradle.