The thermal-magnetic trip unit (TM240) provides overload protection adjustable from 350 A to 500 A (Ir) and short-circuit protection (Ii) set at 5 to 10 times In, so the breaker can be tuned to the cable and load rather than running at a fixed threshold.
Integration Notes
Two auxiliary switch changeover contacts are integrated, allowing status feedback to the PLC or indication circuit without additional wiring modules. The adjustable Ir band (350–500 A) lets the commissioning engineer match the trip point to the actual load current during startup, not just the nameplate In.