Type B residual current circuit-breakers are AC-DC sensitive. The SK characteristic limits the risk of unwanted tripping providing maximum system availability, for frequencies ranging from 0 to 150 kHz. With low tripping sensitivity at higher frequencies, our SK circuit-breakers are perfectly suited for use in facilities where preventive fire protection measures are provided by additional means. NA RCCBs allow you to connect push-buttons for the immediate shutdown of the power supply. This enables a fast and precise response in the event of an emergency. The integrated LED continuously displays the status of the emergency switching-off circuit. Our FANA RCCBs combine emergency switching off with with remote operation. They allow for safe switching on and off – conveniently from a distance.

High level of immunity against leakage and residual currents due to operational conditions from frequency 1 kHz and higher, AC/DC sensitive for residual currents with frequencies and mixed frequencies of 0 Hz (smooth direct current) up to 150 kHz, high availability even of voltage-independent detection of smooth DC residual current and AC residual current with frequencies not equal to 50/60 Hz thanks to full functional compatibility with mains voltages from at least 50 V AC on any two active conductors, mains-voltage-independent tripping when type A residual currents occur , compact design for all rated currents, high short-circuit resistance, double-sided two-tier terminals for large conductor cross-section and busbar, switch position indicator, viewing window for labels, multifunction switch toggle with three positions: "on", "off" and "tripped", Neutral conductor position left , With EMERGENCY-OFF function for tripping or disconnection by means of control elements; monitoring of EMERGENCY-OFF function for wire breakage and signalling by LED.

quick fastening to mounting rail, any installation position, supply preferably from above

Commercial and industrial installations with TN-S, TT and TN-C-S systems, where power electronics equipment is used without galvanic isolation from the mains. Also suitable for facilities like training rooms and classrooms. The remote actuator with EMERGENCY-OFF function enables the power supply to be restored, e.g. using key switch, without having to leave the room and/or opening the electrical distribution.

Suitable for use in 50 Hz AC networks, RCCB for other frequencies on request, not intended for use in DC networks or on the output side of controlled electrical equipment such as frequency converters. The DFS 4 supplies an FELV voltage for the emergency stop circuit. For this reason, the emergency stop circuit must be rated for a voltage of 230 VAC. The illuminated disc can be used to lock the DFS 4 as well as to switch the remote drive on or off. The remote drive must be supplied externally with 24 VDC.

• Data sheet DFS4 125-4/0,03-B SK FANA24DC
• Operating instructions
• Text for invitation to tender RTF
• Text for invitation to tender GAEB XML
• Text for invitation to tender GAEB 2000
• Text for invitation to tender GAEB 90
• Dimensional drawing Group view
• STEP file
• Wiring diagram
• Wiring diagram additional file
• Characteristic B SK 30 mA
• Labelling software DFS / DLS
• Download link Cadenas library