A method for latching at least one pole (PR-E) of a relay (300/330) into an actuated state selected from a group comprising switch on, switch over, switch off and reversely switch between cross and straight by engaging said at least one pole with at least one first contact and at least one second contact including no contact respectively; and wherein said relay is operated by a magnetic coil fed by an electric power pulse, characterized by having time duration covering a pull of an armature (PM-E), actuate said at least one pole and fully compress a latching device extended between said at least one pole and one of a base and a body of said relay, wherein said latching device is guided by a guide lock link movable within an indentation path into a state comprising said compress, partial release and release, and wherein said engaging is maintained during movements between said compress and said partial release, said method comprising the steps of: a. Initiating said latching by a feed of said electric power pulse to said coil; wherein a.1 said armature is pulled by the powered coil, and a.2 said at least one pole is actuated into said engaging, and a.3 said latching device is fully compressed awaiting the end of said time duration, and a.4 said latching device is partially released into a lock point , being the latching position, at the end of said time duration and the fed power pulse is cut. b. Initiating said full release by a fresh feed of said electric power pulse to said coil; wherein b.1 said armature is pulled by the powered coil, and b.2 said at least one pole maintains the engagement through and after said time duration, and b.3 said latching device is fully compressed awaiting the end of said time duration, and b.4 said latching device is released from said latching position into a full release point and reverses said engagement state at the end of said time duration and said feed of power pulse is cut. c. feeding a fresh said power pulse to said coil for initiating fresh said a. to b. steps. a. Initiating said latching by a feed of said electric power pulse to said coil; wherein a.1 said armature is pulled by the powered coil, and a.2 said at least one pole is actuated into said engaging, and a.3 said latching device is fully compressed awaiting the end of said time duration, and a.4 said latching device is partially released into a lock point , being the latching position, at the end of said time duration and the fed power pulse is cut. a.1 said armature is pulled by the powered coil, and a.2 said at least one pole is actuated into said engaging, and a.3 said latching device is fully compressed awaiting the end of said time duration, and a.4 said latching device is partially released into a lock point , being the latching position, at the end of said time duration and the fed power pulse is cut. b. Initiating said full release by a fresh feed of said electric power pulse to said coil; wherein b.1 said armature is pulled by the powered coil, and b.2 said at least one pole maintains the engagement through and after said time duration, and b.3 said latching device is fully compressed awaiting the end of said time duration, and b.4 said latching device is released from said latching position into a full release point and reverses said engagement state at the end of said time duration and said feed of power pulse is cut. b.1 said armature is pulled by the powered coil, and b.2 said at least one pole maintains the engagement through and after said time duration, and b.3 said latching device is fully compressed awaiting the end of said time duration, and b.4 said latching device is released from said latching position into a full release point and reverses said engagement state at the end of said time duration and said feed of power pulse is cut. c. feeding a fresh said power pulse to said coil for initiating fresh said a. to b. steps. <EOS>