Residual current circuit-breakers (RCCB) switch the power supply off if dangerous high residual currents occur. DFS 2 are two-terminal residual current circuit-breakers for single-phase networks. In the standard design, the compact devices are just two module widths wide. They are available with many different residual current types and variants for rated currents up to 125 A. The large two-tier terminals can also accommodate large conductor cross-sections. The trip position of the multi-function toggle switch simplifies fault-finding. The free label software helps in the labelling process. Type A switches are sensitive to pulsating and alternating currents. This function is independent of the mains voltage. Switches in the FT design enable remote RCCB testing. An auxiliary contact also signals tripping of the circuit-breaker.

help function integrated, pin assignment 1 break contact/1 changeover contact , tripping not dependent on mains and auxiliary voltage, sensitive to AC residual currents and pulsating DC residual currents (type A) , 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 or right

quick fastening to mounting rail, any installation position, supply from any direction

Power supplies to residential and purpose-built buildings as well as industrial facilities with TN-S, TT and TN-C-S networks. In IT networks, the residual current circuit-breakers of this series can be set to switch off in the event of a second fault, RCCBs from the FT series are especially suitable for the remote switch-off of systems and parts of systems and for being tripped by hazard alarms, amongst other devices, Excluded is the application in TN-C systems and for the protection of installations in which electronic equipment could generate smooth DC currents or residual currents with frequencies other than 50 Hz. Comprehensive protection is not provided in this case. For these applications we recommend our AC/DC sensitive residual current circuit-breakers (Type B or B+).

Devices for FT variants must not be used in emergency-stop positions. The type-A and type-B NA variants are available for this purpose, The contacts of the external command device must be designed for a rated residual current ≥ 0.5 A and for the rated voltage of the residual current circuit-breaker.

• Operating instructions
• Data sheet
• Prospectus Power for building sites
• Technical information Derating graph for DFS 2/4
• Technical information dissipation power DFS 2/4
• Prospectus Complete RCCB brochure
• Prospectus Circuit-breaker overview
• Prospectus DFS HD "heavy duty"
• 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
• Labelling software DFS/DLS