Doepke residual current circuit breakers (RCCB) disconnect the power supply when dangerously high fault currents occur, thereby protecting people, animals, and installations. Devices from the DFS 4 series are compact four-pole residual current circuit breakers for single-phase or three-phase networks. In the standard version, they occupy only four division units. The all-current-sensitive switches detect smooth direct fault currents as well as all other fault currents according to DIN VDE 0664-400. The PV variant has been specifically developed for use in photovoltaic systems and offers the highest possible level of protection for this purpose. With a PV-optimized short-time delay, the all-current-sensitive residual current circuit breaker is resistant to surge currents, providing higher system availability due to fewer unwanted trippings. Devices in standard version are designed for monitoring circuits with a rated voltage of 230 V, 400 V, and a rated frequency of 50 Hz.

Features:

• All-current-sensitive for fault currents with frequencies and mixed frequencies from 0 Hz to 20 kHz
• Fire protection according to VDE 0100-420
• Full functionality with network voltages of at least 50 V AC on any two active conductors
• High short-circuit resistance
• Double-decker terminals on both sides for large conductor cross-sections and rail connection
• Switching position indicator
• Multifunction switch knob with three positions: on, off, tripped
• Neutral conductor position flexible
• Mounting type: quick fastening on mounting rail
• Installation position flexible
• Preferred feed from above

Areas of application: RCCBs of the PV variant are suitable for private, commercial, and industrial installations with TN-S, TT, and TN-C-S systems where photovoltaic systems are installed. Notes: suitable for use in 50 Hz alternating current networks; not suitable for use on the output side of controlled electrical equipment.