CLAMPER Grid is a high-capacity Surge Protective Device (SPD) capable of handling currents generated by electrical surges. It is an automatic disconnect device that is non-explosive and provides easy visual indication of its state/fault. The installation is simplified in equipment and transformers, and the device is resistant to weather conditions such as corrosion and radiation.

Equipment and transformer protection (secondary coil), in the latter case, is achieved by connecting directly to the secondary terminal through the mounting bracket, and its grounding is accomplished using a stainless steel screw.