22.5 mm wide monitoring relay, 3-phase voltage control,

Overvoltage and undervoltage control for 3-phase 3-wire or 4-wire power supplies, for all models. Switching between 3-wire or 4-wire 3-phase power supplies. Overvoltage or undervoltage: operating delay of 0.1 to 30 s Easy operation monitoring using an indicator light Separate outputs possible for overvoltages and undervoltages Reset method: automatic Power-on delay: 1 s or 5 s