The invention relates to an apparatus (50) for sectioning the phase conductors (L1, L2, L3) of a multi-phase electric power distribution network (NET) comprising a plurality of disconnectors (1, 2, 3), each disconnector being operatively associated to a related said phase conductor and comprising switching means (S) for sectioning a related phase conductor and a control unit (CU) that is capable of controlling said switching means and is capable of wireless communicating with remote devices. The control units of said disconnectors (1, 2, 3) execute different managing procedure depending on the operating status of said electric power distribution network. In a further aspect, the invention relates to a control system for executing the above described method.

An electronic electrical device comprising a first electrical conductor for the input of electric current, a second electrical conductor for the output of electric current, first and second electrical control devices, and first and second actuation systems. The first electrical control device and the second electrical control device are each adapted to have two respective positions to electrically connect and disconnect the first electrical conductor and the second electrical conductor to and from each other. The first actuation system comprising a digital electronic controller and the second actuation system comprising only mechanical components, or electromechanical components, or mechanical and electromechanical components. The first actuation system is adapted to vary the position of said first electrical control device independently of said second actuation system. The second actuation means is adapted to vary the position of said second electrical control device independently of said first actuation system.

Example methods and apparatuses of controlling a user interface with a plurality of input mechanisms are disclosed. One example method includes causing a first set of input mechanisms in the plurality of input mechanisms to be visually emphasized via a first visual technique while a second set of input mechanisms in the plurality of input mechanisms is not visually emphasized via the first visual technique, receiving a user input via an input mechanism that is included in the first set, based on the user input, determining a third set of input mechanisms in the plurality of input mechanisms and a fourth set of input mechanisms in the plurality of input mechanisms, and causing the third set of input mechanisms to be visually emphasized via the first visual technique while the fourth set of available input mechanisms is not visually emphasized via the first visual technique.