MCCB for motor protection with ETU860M
The interrupting ratings are substantial: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.8 kA at 690 V — that's enough SCCR headroom to coordinate downstream of a large transformer or generator without cascading upstream. This breaker includes phase failure detection and ground fault monitoring via summation current formation on the L-conductor, so it catches a lost phase or a ground leak before the motor cooks. The ETU860M also supports communication functions, meaning it can talk to a higher-level control system for trip data and remote reset — useful on a line where you want to log fault events without sending someone to the panel.
Power loss is a maximum of 10 W, so heat buildup in a densely packed panel is manageable.