RESIDUAL CURRENT DEVICE ACTI 9 RCCB B SI 40A 4P 30MA

Type B residual current devices are suitable for protection in applications where variable-frequency and pure DC residual currents occur, which cannot be protected against with conventional Type A devices. Such applications include electric vehicle charging, inverters for solar power systems, and frequency converter drives. Type SI (Super Immunity) residual current switches are used in applications where continuous operation is of critical importance. These products offer high performance in environments with high-frequency impulse spikes or challenging external conditions (dust, salt). EV versions are designed for electric vehicle charging applications. This product description is an automated translation of the original Finnish description.