PZ30 terminal assembly is suitable for single phase three wire or three phase five wire terminal circuit with rated voltage of 220V or 380V and load total current flow of not more than 100A, as a complete set of equipment to control the use of electricity, overload, short circuit overvoltage and leakage protection. It can be widely used in high-rise buildings, hotels, residences, railway stations, ports, airports, hospitals, cinemas and theaters, large commercial outlets and industrial and mining enterprises.