The SST150B is a high-performance surge protection unit for IEC/AS Class II applications. It is designed for use in Main Switchboards, Sub Boards and on end-of-line circuits. The application areas of the SST105B are endless, e.g., industrial, commercial, domestic, specialised operations such as emergency services, telecommunications, water / waste water, process control etc. The SST150B can be installed to protect remote pumping stations, irrigation systems, remote rail signalling locations, remote gas pipeline operations etc., all of which require routine inspection. The SST150B enables large cost and time savings on inspections. When used in large production facilities, it can be used in conjunction with a preventive maintenance plan to allow for quick and easy inspections by any personnel available.