MCCB with motor-protection curve and ETU350M
It carries an ETU350M electronic overcurrent release, which gives you adjustable thermal and magnetic settings tailored to motor starting characteristics — not just cable protection. The interrupting ratings are substantial: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V, so it handles high fault-current scenarios without cascading upstream. A built-in shunt trip (STL) and two HQ auxiliary switches are included on the basic switch.
Above that, the breaker derates: 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. Maximum power loss is 75 W.
Phase-failure detection is built in, and the trip indicator is not present on this variant. Undervoltage release is not fitted.