What is the benefit of a cascade or hybrid surge protector ?
All surge protection components have a performance were the let-thru-voltage increases with the current in the surge. Therefore, if you install a single large surge protector at the entrance to a building, or a single device on a data or communications line, then the let-thru-voltage, (LTV), to the equipment that you are protecting is a variable related to the current in the surge. This can mean LTV’s in excess of 2kV can get through to your equipment. This is also true for a communication or data line, some of which operate at 5 – 50 volts. In the case of electrical power, it is prudent to have a “Primary” surge protector on the main electrical service panel, then a secondary surge protector on a sub panel feeding the equipment to be protected. This will remove the “uncontrollable” performance of your system and regulate the LTV. IN the case of communications and data lines, it is practical to have multiple stages in a single small device that perform this function so that the LTV is
