The circuit breakers of the xEffect NZM-PX-TZ 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, making them 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 directly at the breaker via the micro-USB interface. Installation is flexible due to modular functional groups and can be supplemented by a comprehensive range of accessories. Effective value measurement and thermal memory are also available.