Doepke DFS4 040-4/0.03-B SK FI switch all-current sensitive 09134998

Function
Residual current circuit breakers (RCCBs) are components for implementing the protective measure 'protection by automatic shutdown of the power supply' in accordance with the requirements of VDE 0100 Part 410 or corresponding international installation regulations. Devices in the DFS 4 series are compact two- or four-pole residual current circuit breakers. In the standard version, they only take up four division units. While the DFS 4 version for alternating and pulsating direct residual currents is designed for three-phase networks, but can also be used in single-phase networks, there are special versions for single- or three-phase operation in the universal current sensitive versions (type B, type B +). Despite the compact dimensions, a large number of different tripping currents and characteristics are available for rated currents - depending on the version - up to 125 A. All devices are available in the 'HD' version, which is particularly suitable for use in harsh environments (tunnels, swimming pools, etc.). They also have large double-deck terminals for accommodating large conductor cross-sections, a practical multi-function switch toggle and can be labeled with pre-made labels using free software. DFS 2 and DFS 4 with residual current characteristic B detect smooth DC residual currents as well as all other residual currents of type B in accordance with IEC 60755. The operating voltage required for this is taken from the mains voltage. Correct voltage supply is guaranteed if the voltage between the mains conductors = 50 V. Type A residual currents are detected regardless of the mains voltage. Furthermore, these residual current circuit breakers detect residual currents of all frequencies up to 100 kHz without gaps. With this large frequency range of residual current detection, they significantly exceed the requirements of the construction standards for type B residual current circuit breakers. Fault protection in accordance with VDE 0100 Part 410 is provided over the entire frequency range of residual current detection with an appropriate earth resistance. The maximum permissible earthing resistance is calculated as the quotient of the permissible contact voltage and the highest tripping fault current in the entire frequency range covered. In residual current circuit breakers with the SK characteristic, the frequency response of the tripping current is
designed so that fault currents with high frequencies, e.g. in the range of the clock frequencies of AC and frequency converters
compared to the rated frequency with significantly reduced sensitivity. This largely prevents unwanted tripping due to leakage currents. However, depending on the rated residual current of the switch (0.03 A, 0.1 A or 0.3 A), fire protection is only provided for residual currents with frequencies up to 1000 Hz, 300 Hz or 100 Hz, while devices with the tripping frequency response B+ or NK offer this protection level over the entire tripping frequency range up to 20 kHz or 100 kHz. Standard devices are designed for monitoring circuits with a rated voltage of 230 V or 400 V and a rated frequency of 50 Hz.
Properties
high immunity to transient leakage and fault currents due to slow response of the tripping, meets the requirements of the construction regulations VDE 0664-10, VDE 0664-40, ÖVE/ÖNORM E 8601, universal current sensitive for fault currents with frequencies and mixed frequencies from 0 Hz (smooth direct current) to 100 kHz, electromagnetic compatibility in accordance with VDE 0664-30 and VDE 0839-6-2 (interference immunity for industrial applications), high availability also of the voltage-dependent detection of smooth direct fault current and alternating fault currents with frequencies ¿ 50/60 Hz due to full functionality with mains voltages from at least 50 V AC on any two active conductors, mains voltage-independent tripping for fault currents of type A, small size for all rated currents, high short-circuit strength, double-deck terminals on both sides for
Type: DFS4 040-4/0,03-B SK