The circuit breakers of the xEffect NZM-PX-TAZ series with Power Expert Release (PXR) electronics cover a wide range of applications for full-range protection, including earth fault protection, with just four compact sizes, and are suitable for the IEC market. The integrated energy measurement function provides currents, voltages, and active energy (kWh) with accuracy class 1 according to IEC 61557-12. Maintenance mode ARMS and zone selectivity for enhanced protection are included. Testing functions and settings can be accessed via a micro-USB interface directly on the breaker. Installation is always flexible due to modular functional groups and can be supplemented with a comprehensive range of accessories. Effective value measurement and thermal memory are also featured.