Residual current circuit breaker (RCCB) with auxiliary device Doepke

Residual current circuit-breakers (RCCB) switch the power supply off if dangerous high residual currents occur. DFS 4 are two-terminal or two-terminal pair residual current circuit-breakers for single- or three-phase networks. In the standard design, the compact devices are just four 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. The Twin design enables a function test of the residual current circuit-breaker without switching off the load circuit. Two complete RCCBs are combined in this design: If both devices are on, a switch can be tripped using the test button. The second RCCB takes over the current conduction and protective function. Type A switches are sensitive to pulsating and alternating currents. This function is independent of the mains voltage. Devices in the standard design are intended for monitoring circuits with a rated voltage of 230 V, 400 V and a rated frequency of 50 Hz. Properties: function test for residual current circuit-breaker without interrupting power; residual current protection complies with standard even during testing procedure; no costs during system downtime; high system availability; 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"; Mounting: quick fastening to mounting rail; any installation position; supply from any direction; Application areas: 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; The twin design allows regularly prescribed function tests to be performed without disconnecting the power; 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; Hints: WES 2 restart interlock mounted at factory.