The xEffect NZM-PX series circuit breakers with Power Expert Release (PXR) electronics cover application cases 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 directly at the breaker via a micro-USB interface. Installation is always flexible thanks to modular functional groups and can be enhanced with a wide range of accessories. Effective value measurement and thermal memory are also included.