DFS HP and DRCBO HP: Residual current protection for heat pumps

Doepke presents the DFS HP residual current circuit-breakers (HP stands for “Heat Pump”) and the DRCBO HP residual current operated circuit-breakers with integral overcurrent protection. They have been specially developed for use in installations with heat pumps and offers the highest possible protection level.

The rise of sustainable technologies also requires new strategies for their protection. The specifications of most heat pump manufacturers do not allow any compromises: as heat pumps use frequency inverters that can generate smooth DC residual currents, manufactures stipulate the use of residual current devices that are AC/DC sensitive.

DFS HP and DRCBO HP from residual current protection expert Doepke are AC/DC sensitive residual current devices that have been specially developed for protecting heat pumps. Their protection level not only meets all the requirements of heat pump manufacturers, but the HP-optimised short time delay also ensures increased system availability. This means that the heat pump continues to run even in the event of brief impulse-shaped surge currents without affecting the protective effect. Furthermore, the RCBOs provide additional protection against short circuits and overloads by disconnecting only the affected circuit.

DFS HP and DRCBO HP are available with a rated residual currents of 30 mA, 100 mA and 300 mA.

The DFS HP is also available in an HD (= Heavy Duty) version for use in harsh environments. In this version, it is particularly resistant to dust, harmful gases, heat and cold.