Noark residual current devices are suitable for domestic and industrial applications where inverters, photovoltaic installations, electric vehicle chargers, etc. are used. Type B residual current devices are sensitive to sinusoidal residual current, rectified pulsed and smooth currents. These switches have a high frequency up to 1 kHz.

They are based on electronic technology, which brings benefits in the form of a more precise evaluation of the differential current, as a consequence, the life of the device has been extended. These circuit breakers do not encounter difficulties related to the magnetization of internal circuits, as is the case with standard solutions. This allows you to limit the frequency of recommended tests, but they must be performed regularly, in accordance with applicable regulations and standards. For the Ex9LB63 series, testing is recommended every 6 months for normal conditions and monthly for severe contact conditions.