Carlo Gavazzi Monitoring Relay 3-Phase, Phase Max. and Min. Voltage Control, w/Timer, S Housing, Plug-In, SPDT, Supply: 380VAC.
3-phase monitoring plug-in relay for separate upper and lower voltage control. Often used where the generated electrical power is unstable (or incorrect) in order to secure the equipment. The S 172 features built-in time delay.
General Characteristics
Monitoring relay and 3-phased measuring relay for upper/lower phase-phase voltages control
Measures if all 3 phase-phase voltages are within set limits