Voltage Monitor, E3YF400V02 0.85

​The E3YF400V02 0.85 is a voltage monitoring relay designed to ensure the stability and safety of three-phase systems by monitoring each phase against the neutral wire. Operating at a nominal voltage of 400/230V AC, it features a fixed switching threshold set at 195.5V (L-N), corresponding to 85% of the nominal voltage, with a hysteresis of approximately 5%, providing consistent undervoltage detection. The relay includes a tripping delay of approximately 200 milliseconds to prevent nuisance tripping due to transient voltage dips. Equipped with two changeover contacts rated at 250V AC and 5A, the E3YF400V02 0.85 offers reliable switching capabilities. Its compact 35mm DIN-rail mountable design allows for efficient installation in control panels. LED indicators provide clear visual status updates: a green LED signals the presence of supply voltage, while a yellow LED indicates the relay output status. Engineered for precision and durability, the E3YF400V02 0.85 is an ideal solution for safeguarding three-phase systems against undervoltage conditions. - Monitoring relay series ENYA - Undervoltage monitoring 3-phase - Measuring voltage = supply voltage - Switching threshold fixed U x 0,85 - Supply voltage 3x 400/230V AC - Voltage monitoring in accordance with VDE 0108-100 and VDE 0100-718 - 2 changeover contacts - width 35mm - Installation type