Switches and push-buttons are components for switching consumers in industrial, commercial and private electrical installations, such as switch-disconnectors, impulse relays (remote switches) and main switches. The series DHS 2 devices are switch-disconnectors or main switches in two-pole design. Their design makes them excellent for integration in the optics of the DFS residual current circuit-breakers. The DHS devices can be extended by an auxiliary or error signal switch, which allows for the display and further processing of the switch position. The devices in series RH are modular main load switches with disconnector function, with contacts that are very durable. The design facilitates the use of an interlock and meets international design regulations.