Overview
The LV432949 is a Schneider ComPact NSX molded case circuit breaker rated for 3-pole motor duty at 500 A switching current on a 690 V AC supply, carrying an 85 kA ICu breaking capacity at 415 V AC. It ships with a MicroLogic 1.3 M electronic trip unit set to 500 A at 65 °C, providing magnetic short-circuit protection for motor feeders.
The 85 kA ICu at 415 V AC gives headroom for high-fault installations; the MicroLogic 1.3 M trip unit is tuned for motor inrush, not distribution overloads, so size it for the motor full-load current, not the breaker's 500 A maximum.
