Crouzet Voltage Monitoring Relay, 1 Phase, SPDT, DIN Rail

The control of AC and DC voltage
0.2V to 60V (EUL) and 10 to 600V (EUH) measurement ranges
Selection of over-voltage and under-voltage, by means of a dip switch
Delay on threshold over-run 0.1s to 3s

Operating range quoted is a factor of supply voltage (Un)