The xEffect NZM-PX circuit breakers with Power Expert Release (PXR) electronics cover a wide range of applications for full-range 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. 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 enhanced with a comprehensive range of accessories. Effective value measurement and thermal memory are also included.