Phase Failure Relays

Phase failure relays from ABB, Eaton, Finder, Tele and Disibeint, including single-phase, three-phase and multifunction monitoring units with DIN-rail mounting, adjustable thresholds and SPDT/DPDT outputs. Central test units for emergency lighting systems provide timed functional and duration test control in line with BS EN 50172 and BS 5266 practices.