Mabokosi a S7 surgace ndi ntchito zoteteza ma circuit short circuit ndi overload, ndipo amagwiritsidwa ntchito m'mafakitale, mabizinesi ndi nyumba zogona. Alinso ndi ubwino wokhala ndi chitetezo chapamwamba (mpaka IP20), mphamvu yosweka kwambiri, kugwira ntchito modalirika komanso kosavuta, kusavuta, kukhazikitsa ma pole ambiri, moyo wautali wautumiki, ndi zina zotero. Mzere umodzi ndi woyenera kwambiri pa circuit ya 50Hz ndi 240V AC; ma pole awiri, atatu ndi anayi ndi oyenera pa circuit ya 50Hz ndi 415V kuti ateteze overload ndi short circuit. Amagwiritsidwanso ntchito kuyatsa kapena kuzima zida zamagetsi ndi ma circuit a magetsi nthawi zonse.