With the expansion of renewable energies, global demand for photovoltaic systems and heat pumps has increased significantly. At the same time, charging infrastructure for electric mobility continues to grow. Technologies for the sustainable generation and use of energy also require future-proof residual current protection strategies. For this reason, we present our new residual current protective devices specifically designed to meet the requirements of photovoltaic systems, heat pumps and electric mobility. For sustainable safety.

DFS PV and DRCBO PV – Residual current protection for photovoltaic systems

The DFS PV has been specially developed for use in photovoltaic systems.
In principle, all-current sensitive residual current protective devices are required by standards for electrical installations with a PV power supply system. Exceptions only apply if the manufacturer of the PV system or the connected inverters permits otherwise. As photovoltaic systems use inverters that can generate smooth DC residual currents, Doepke recommends the use of all-current sensitive residual current protective devices for all PV systems.
Thanks to a PV-optimised short-time delay, the all-current sensitive DFS PV is resistant to surge currents. This ensures higher system availability due to fewer unwanted trippings. The special internal design of the DFS PV ensures reduced power loss, making it particularly energy-efficient.
The DFS PV is available with rated residual currents of 100 mA and 300 mA and also in an HD (= Heavy Duty) version. In this version, it is particularly resistant to dust, corrosive gases, heat and cold.
In addition, Doepke also offers PV-optimised RCBOs (residual current operated circuit-breakers with integral overcurrent protection). You can find our residual current circuit-breakers and RCBOs for use in PV systems here.

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

The DFS HP (HP stands for “Heat Pump”) has been specially developed for use in heat pump systems.
As heat pumps use frequency inverters that can generate smooth DC residual currents, most manufacturers stipulate the use of all-current sensitive residual current protective devices.
The DFS HP is an all-current sensitive residual current protective device specially designed for protecting heat pumps. Its protection level not only meets all the requirements of heat pump manufacturers; the HP-optimised short-time delay also ensures increased system availability. Even in the event of brief impulse-type surge currents, the heat pump continues to operate without impairing the protective function.
The DFS HP is available with rated residual currents of 30 mA, 100 mA and 300 mA and also in an HD (= Heavy Duty) version. In addition, a heat pump-optimised RCBO version is also available.
You can find our protective devices for heat pumps here.

DFS EV – Residual current protection for electric mobility

The DFS EV has been specially developed for charging equipment for electric vehicles.
The requirements for residual current protection devices in charging equipment are defined at international level in the product standard IEC 62955. This ensures comprehensive safety, as smooth DC residual currents exceeding 6 mA may occur during the charging process.
Conventional Type A residual current circuit-breakers are not designed for this purpose. Type B devices, in turn, are not suitable if upstream Type A or Type F RCDs are installed. With the DFS EV, DC residual current detection is already integrated. As a result, the DFS EV complies with the IEC 62955 product standard in one compact device.
You can find our EV versions of residual current circuit-breakers here and here.