Conform to IEC 61008 – 1, IEC 62423 (B type and F type). Compatible with prong-type and fork type supply busbars. AC type : detect sinusoidal AC residual currents. A type : detect sinusoidal AC and pulsating DC residual currents. F type (High immunity) : detect AC and pulsating DC residual currents. Enhanced immunity to unwanted tripping in disturbed environments. Detection of high frequency fault currents. B type : detect sinusoidal AC, pulsating DC and smooth DC residual currents. Can be equipped with DX³ signalling and remote tripping auxiliaries and motorised controls .