Surge arresters type T3 intended for use in installation and floor boxes and cable trays. Additional protection of socket circuits supplying devices with sensitive electronics. Additional protection of industrial socket circuits equipped with surge protection and a high-frequency filter (PZH HF, PZH HF3). Installed at the boundaries of LPZ 2 – LPZ 3, as close as possible to the protected device (no further than 5 m). In front of PZH R3 C/S must be installed a lightning current and surge arrester T1 and T2 from HERMI company. The protection devices offer a high discharge capacity in the surge arrester category T3, with UOC 6 kV / In 3 kA. Application standards: IEC 62305:2010, HD 60364-5-53:2022, CLC/TS 61643-12:2009.