Implement 400 kv lightning arrester graded protection according to the hierarchical structure of the electrical system, for example, install Class B 66 kv lightning arrester in the main distribution cabinet, Class C 66kv surge arrester in the secondary. Implement 400 kv lightning arrester graded protection according to the hierarchical structure of the electrical system, for example, install Class B 66 kv lightning arrester in the main distribution cabinet, Class C 66kv surge arrester in the secondary. This protection against surge voltage can be achieved with the targeted implementation of the LIMITOR surge arrester from ABB. Because we depend on electronic data processing nearly everywhere today, such failures could have catastrophic consequences. Are your electronic systems and equipment. OBO Bettermann is one of the world's most experi-enced manufacturers of lightning and surge protection systems. For almost 100 years, OBO has been devel-oping and producing standard-compliant lightning pro-tection components. When there is Thor is all about protecting against the damaging effects of power. chanical and concrete applications. These Pentair products are sold globally under a variety of market-leading brands: ERICO welded electrical connections, facility electrical protection, and rail and industrial products; CADDY fixing, fastening and support products; ERIFLEX low voltage power and. actiVsense, BLITZDUCTOR, Blitzfibel, BLITZPLANER, CUI, DEHN, DEHN logo, DEHNARRESTER, DEHNbloc, DEHNbridge, DEHNfix, DEHNgrip, DEHNguard, DEHNport, DEHNQUICK, DEHNrapid, DEHN schützt., DEHNshield, DEHNsnap, DEHNventil, HVI, LifeCheck, Red/Line, “. mit Sicherheit DEHN“ and the colour trade mark.