Intelligent circuit breakers integrate modern high-voltage zero arc-flash technology, electronic technology, electrical automation technology, network communication technology, computer and software technology, etc. They adopt a modular structure, completely breaking through many shortcomings of traditional circuit breakers, and integrate protection, measurement, and monitoring into one unit. In addition to conventional control, protection, alarm, and setting functions such as overload, overcurrent, instantaneous trip, leakage, and grounding, they also feature human-machine interface display, storage, memory, logical analysis, judgment and selection, as well as network communication functions. They can display various characteristic parameters such as temperature, current, voltage, power factor, active power, and reactive power in real time, and store fault parameters and types, with self-diagnostic capability. The zinc oxide arrester live-line tester can measure the total current, resistive current and its harmonics, power frequency reference voltage and its harmonics, active power, and phase difference of zinc oxide arresters. The large screen can display the real waveforms of voltage and current. This provides on-site actual operating data for operation and maintenance personnel to perform corresponding information queries and fault judgment and handling, laying the foundation for optimizing the system operation mode. Through its network communication technology, multiple intelligent circuit breakers can achieve two-way communication with the central control computer, forming an intelligent power supply and distribution system, realizing the "four remote" functions, and creating necessary equipment and technical guarantees for unattended stations, regional interlocking, remote monitoring, and operation mode adjustment.
