Load break switches or main switches completely and completely isolate electrical consumers or system components from the electrical supply. They also switch under load or overload. They are used to switch off for maintenance work and to protect systems. The devices in the DHS 4 series are load break switches or main switches in a four-pole design in which the N contact is switched on leading and switched off lagging. Their design means they fit in perfectly with the appearance of the DFS residual current circuit breakers. DHS with EMERGENCY STOP function enable the connection of an EMERGENCY STOP device, such as a button. An integrated LED signals that the device has been triggered by an actuating element or by a broken wire. Re-switching is prevented until the problem is resolved. Properties: with EMERGENCY STOP function for triggering or switching off using actuating elements, monitoring of the EMERGENCY STOP function for wire breakage and display via an LED, in the event of a power failure the EMERGENCY STOP function does not trigger, high short-circuit strength and high switching capacity, double-sided double-deck terminals for large conductor cross-sections and busbars, switch position indicator, mounting type: quick fastening on mounting rail, feed from above, installation position as desired, areas of application: particularly suitable for use in main distribution boards in extensive power supplies, e.g. for campsites, marinas, allotments, showgrounds, etc., notes: in accordance with EN 60947-3, load-break switches combine the function of a load switch, which can switch a current (including a specified operational overload) on, conduct and switch off under operating conditions, and the function of a disconnector, which ensures safe separation when switched off by ensuring sufficient contact spacing. The DHS 4 supplies a FELV voltage for the emergency stop circuit. For this reason, the emergency stop circuit must be designed for a voltage of 230 VAC. The light disc can be used to lock the DHS 4 and also to switch the remote drive on or off.