The xEffect NZM-PX series circuit breakers with Power Expert Release (PXR) electronics cover full-range protection applications 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 complemented by a wide range of accessories. True RMS measurement and thermal memory are also included.