The NB2LE-80ZT Residual Current Action Circuit Breaker with Overcurrent Protection is an advanced all-in-one device providing comprehensive protection against overload, short-circuit, overvoltage, undervoltage, and earth leakage faults for electrical circuits up to 80A. This intelligent RCBO features remote control, real-time electrical parameter measurement (voltage, current, power), and seamless networking via RS485 or Bluetooth, enabling integration into smart systems for enhanced monitoring and management. With automatic leakage self-check and fault alarms, it ensures superior safety, efficiency, and reliable power distribution across diverse environments, including residential, smart buildings, commercial, and industrial electrical systems.