Residual current circuit breakers (RCCB) switch off the power supply when dangerously high residual currents occur. They thus protect people, animals and systems. DFS 2 are two-pole residual current circuit breakers for single-phase networks. In the standard version, the compact devices are two modules wide. They are available with many different residual current types and versions with rated currents of up to 125 A. The large double-deck terminals can also accommodate large conductor cross-sections. The tripped position of the multi-function switch knob makes troubleshooting easier. The free label software helps with labeling. Type A switches are sensitive to pulse and alternating current. This function is independent of the mains voltage. FT-version switches enable the test button to be triggered remotely. An auxiliary contact can be used to indicate externally when the circuit breaker trips. Properties: integrated auxiliary switching function, contact assignment 1 break contact/1 changeover contact, tripping independent of mains and auxiliary voltage, sensitive for alternating and pulsating direct residual currents (type A), small size for all rated currents, high short-circuit strength, double-sided double-deck terminals for large conductor cross-sections and rail connection, switch position indicator, viewing window for labeling labels, multi-function switch toggle with three positions: 'on', 'off', 'tripped', connection C1, neutral conductor position as desired, mounting type: quick fastening on mounting rail, installation position as desired, feed direction as desired, areas of application: power supplies for residential and commercial buildings as well as industrial plants with TN-S, TT and TN-CS networks. In IT networks, residual current circuit breakers from this series can be provided for shutdown in the event of a second fault. RCCBs from the FT series are particularly suitable for remote shutdown of systems or parts of systems and triggering the RCCB via hazard warning devices or similar. They cannot be used in TN-C networks or for protecting systems in which electronic equipment can cause smooth direct residual currents or residual currents with frequencies other than 50 Hz. Comprehensive protection is not provided here. For such applications, we recommend our universal current-sensitive residual current circuit breakers (type B or B+). Notes: Devices from the FT variant must not be used in emergency stop circuits. The NA variant in the available types A and B is suitable for this purpose. The contacts of the external control device must be designed for a rated residual current >= 0.5 A and for the rated voltage of the residual current circuit breaker.
