The BENDER VME421H-D-2 is a multifunctional monitoring relay designed for single-phase systems, featuring comprehensive protection against overvoltage, undervoltage, overfrequency, and underfrequency conditions. It operates within a voltage range of 70-300VDC and 15-460VAC, with an adjustable time delay of 0-300 seconds. Part of the LINETRAXX series, this model (B93010004) ensures reliable system monitoring and protection.