DRCBO 4 B AC-DC sensitive residual current operated circuit-breaker with integral overcurrent protection
The DRCBO 4 B AC-DC sensitive RCBOs from Doepke are now much slimmer, with the two-terminal version covering just 2.5 module widths, while the four-terminal version covers only 4.5 module widths on the DIN rail.
The dual protective function is, of course, retained, and the DRCBO 4 B provides reliable protection against pulsating and AC residual currents, mixed frequency residual currents and smooth DC residual currents. As RCBOs, they also protect against short-circuits and overload by only disconnecting affected electric circuits. This makes troubleshooting easier and increases system availability.
The AC-DC sensitive devices are optimised for electric circuits with electronic consumers for power control, e.g. frequency converters. Traditional applications include pump installations, air conditioning and ventilation systems, photovoltaic systems, heat pumps, cranes and various other electrical devices on construction sites.
The DRCBO 4 B is available with the tripping characteristic B SK for high system availability and B NK as well as B + for preventative fire protection for rated currents of up to 32 A and with rated residual currents 30, 100 and 300 mA.