Residual current circuit breakers (RCCB) disconnect the power supply when dangerously high fault currents occur, thus protecting people, animals, and equipment. The DFS 4 series devices 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 HP (Heat Pump) variant has been specifically developed for the protection of heat pumps. The protection level of the all-current-sensitive residual current circuit breaker meets all requirements of heat pump manufacturers. Additionally, the HP-optimized short-time delay ensures increased system availability. Standard version devices 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-deck terminals on both sides for large conductor cross-sections and rail connection
• Switching position indicator
• Multifunctional switching knob with three positions: on, off, tripped
• Neutral conductor position adjustable
• Mounting type: quick fastening on mounting rail
• Installation position adjustable
• Preferred feed from above

Areas of application: RCCBs of the HP variant are suitable for private, commercial, and industrial installations with TN-S, TT, and TN-C-S systems where heat pumps are used. Notes: suitable for use in 50 Hz alternating current networks, not suitable for use on the output side of controlled electrical devices such as frequency converters.