More sustainable SENTRON 5SV3 types A, AC and F trip in the event of sinusoidal AC fault currents. Type A also trip in the event of pulsating DC fault currents. The protective devices are mainly used for single-phase loads with electrical components in the power supply. Single-phase frequency converters are used in many modern devices, such as washing machines or heating pumps. These can generate residual currents from a frequency mixture with frequency components in the kHz range. Type F residual current operated circuit breakers — which have a surge current strength of > 3 kA and a load capacity with smooth DC fault currents of up to 10 mA — protect against this.

To protect against smooth DC residual currents, use 5SV3 type B/B+ universal current-sensitive RCCBs with an integrated SIGRES function. These RCCBs have an additional converter for the separate detection of DC residual currents and are suitable for use in three-phase systems upstream of input circuits with rectifiers.

According to DIN EN 61009-1 (VDE 0664-20), SENTRON 5SM2, type A and F RC units are suitable for the attachment of miniature circuit breakers. Combined with a miniature circuit breaker, they provide the same functionality as a RCBO. They enable a high degree of flexibility in use and high protection functions.

An RCBO (residual current operated circuit breaker with overcurrent protection) combines residual current detection and overcurrent protection in a single device. The 5SV1 RCBO combines residual current and overload protection in one modular width (MW). More protection devices can be installed in the distribution board and existing installations can easily be expanded with new protection functions in a space-saving solution. The protection devices can also be connected in a 5SM6 AFD unit — offering personal, line and preventive fire protection.

5SU1 RCBOs in 2-, 3- and 4-pole versions combine residual current circuit breakers and miniature circuit breakers in one device. They protect people from fault currents and systems from short circuits and overloads. They deliver all-pole protection of final circuits with 2, 3 or 4 outer conductors as well as protection of the N conductor against overload due to harmonics in non-linear consumers such as PC power supplies, energy-saving lamps or consumer electronics.

5SU1 RCBOs Type A and F combine residual current detection and overcurrent protection in one device. The protective device can also be connected to a 5SM6 AFD unit and offers perfect all-round protection with rated currents of up to 40 A and 10 kA switching capacity.

Patented SIGRES version: Patented SIGRES versions were designed for protection under special conditions. Thanks to the integrated condensation protection, they offer maximum safety and a long service life.

Super-resistant K: With an impulse withstand strength greater than 3 kA, unwanted shutdowns are prevented by briefly delaying the triggering of the RCCB. This avoids unnecessary tripping and system disruptions — for example, in the case of pulsed leakage currents when a capacitor is switched on.

Selective S: With an impulse withstand strength greater than 5 kA, the selective shutdown of individual system parts is made possible by a tripping delay and a staggering of the tripping time and rated residual current.