ERICO's surge protection devices protect against damaging electrical surges on power and communications lines caused by lightning, industrial machinery, and other switching events. like as: AC Power Protection - AC panel protection are designed for electrical service panels, motor control and other switchboards. Data, control and Signal Line Protection Equipotential Bonding for pipeline insulated joints. Point of use protection - for protection of office equipment. Rail Products - There are a range of EPD rail surge protection devices of railroad industry.