The xEffect NZM-PX-TZ series circuit breakers 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. Zone selectivity for enhanced protection is included. A test function and settings can be accessed via a micro-USB interface directly on the breaker. Installation is always flexible through modular function groups and can be supplemented by a comprehensive range of accessories. Effective value measurement and thermal memory are also featured.