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Load break switches or main switches disconnect electrical consumers or system parts completely and at all poles from the electrical supply. They also switch under load or overload. They are used for disconnection for maintenance work and for system protection. The devices of the DHS 4 series are load-break switches or main switches in four-pole design in which the N-contact is switched on in advance and switched off in retardation. Due to their design, they fit perfectly into the look of the DFS residual current circuit-breakers. DHS with emergency-stop function allow the connection of an emergency-stop device, such as a pushbutton. An integrated LED signals tripping by an actuating element or by wire breakage. A restart is prevented until it is rectified. Features: with emergency stop function for triggering or switching off by means of actuating elements Monitoring of the emergency stop function for wire breakage and indication by means of an LED high short-circuit resistance and high switching capacity double-level terminals on both sides for large conductor cross-section and busbars switch position indicator viewing window for labelling labels Mounting type: quick-fixing on mounting rail Mounting position any Areas of application: particularly suitable for use in main distribution boards in widely extended power supplies e.g. for camping sites, yachts, etc. E.g. for campsites, marinas, allotment garden colonies, showgrounds, etc. Notes: According to EN 60947-3, load switches, disconnectors and switch-disconnectors are used as main switches in practice. The load switch must switch on, conduct and switch off currents under operating conditions in the circuit (including a specified operational overload). In the switched-off position, no disconnecting function is required for this. A load switch is therefore not suitable for safe disconnection in the sense of the international installation regulations. Disconnectors must fulfil the corresponding requirements for an isolating function in the switched-off position, but only currents of negligible magnitude need to be switched during operation. The combination of both designs is the switch-disconnector, which combines both properties and can thus be used universally for safe disconnection of electrical installations.
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