Phase failure relays (sensors)

Phase failure relays protects phase motors from damage caused by the work at half power. The device switches off the power supply circuit of contactor coil motor control in case of voltage asymmetry in individual phases and in particular the power failure in at least one of the phases.

W 300 s1 W 301 s1 W 303 sr W 300 s
W 301 s W 303 ss W 300 nm W 301 nm
W 303 s W 300 p W 301 p W 310 s