Safety relay MXV-30

voltageSPDTthree-phase

A relay for monitoring a 3-phase AC power supply with/without Neutral. When the voltage of the 3 phases U,V,W (L1, L2, L3) are within the range, adjustable on the front, the relay is energised. If one or more of the phase voltages moves outside the limits, the relay de-energises. A LED indicates over or under voltage. When all the voltages are again within the limits the relay will re-energise. There is also a latch function where the relay after de-energising will remain de-energised, regardless of input voltage, until the latch jumper or the operating voltage is disconnected. Typically used in safety circuits. LED indication is still available when latched. With connection of Neutral the measuring abilities are optimal, as Neutral works as a measuring reference. Without Neutral, the phase monitoring relay generates a Neutral reference from the connected phases. Note: 3x400 gives a nominal voltage between phases of 400VAC. The voltage between Phase and Neutral will be 230V AC. Features • Monitoring of over and under voltage, on 3 phase power supply with or without Neutral. • Adjustable upper and lower voltage limits (80-99% /101-120% of Un). • Automatic locking (Latch). • Output SPDT. • Separate operating voltage 230V AC, or 400V AC.