Citel ds240s 230 g ac surge protector type 2 230v citel ds240s 230 g p citel s ds240s 230 g type 2 surge protectors are compact devices designed to protect single phase networks at the main switchboard p p they provide common differential mode protection and are based on high energy varistors equipped with thermal disconnectors and failure indicator to comply with standards a built in changeover contact can be used for remote signalling p p the ds240s 230 g is din rail compatible and