The circuit breakers of the xEffect NZM-PX-NA series 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 both the IEC and UL markets. 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 comprehensive range of accessories. Effective value measurement and thermal memory are also included.