The circuit breakers of the xEffect NZM-PX-TZ series with Power Expert Release (PXR) electronics cover application cases 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 due to modular functional groups and can be complemented by a wide range of accessories. Effective value measurement and thermal memory are also featured.