Schneider Electric Over- or undervoltage between phases

Monitoring Applications: Voltage
Supply Voltage: 120 to 277 V AC
Contact Arrangement: 2-pole switch
Electrical Phases: 3
Voltage Measurement Range: 114 to 329 V AC
Delay Time: 0.3 to 30 s
Width: 35 mm

UL, CSA, GL, C-Tick, GOST. NF EN 60255-6 and IEC 60255-6. RM17 UB3 and RM35 UB3 three-phase voltage monitors. Schneider Electric RM17/35 UB measuring and control relays for three-phase power supply monitor the correct sequence of phases L1, L2, and L3. It also monitors the total failure of one or more phases, asymmetry, as well as overvoltage and undervoltage with independent settings. In the event of a voltage fault, the relay will open at the end of the user-defined delay time. If the device is powered on with a measured fault, the relay remains open. The relay will open immediately in the event of a neutral conductor failure or phase loss. It checks its own power supply. Transparent front panel with hinges. Potentiometer selects voltages between phases. LED display of output status. DIN rail mounting.