Three-phase monitoring relay TCP series

phase sequenceSPCODPCO

• detects phase failure with regenerated voltage present • fixed asymmetry alarm TCP / PCP >10% TCP-L / PCP-L >30% • no neutral connection required • adjustable reaction timer 0.1 - 10s • LED indicators for power supply,relay and reaction timer Control relay to monitor 3-wire, 3-phase systems for the failure of one or more phase, a phase asymmetry shift exceeding 10% and the correct phase rotation (L1, L2, L3) The TCP detects that the phase sequence is correct and that no phasehas failed, in which case the output relay energises.At a loss of one phase (> 25% under nominal voltage) or at a detectionof an asymmetry shift (> 10%), the reaction time starts. At the end oftime the output relay de-energises. Time is adjustable between0.1s and 10s and is used to time out short transients which wouldotherwise cause nuisance tripping. The relay energises again when phase L1, L2 and L3 return to within the permitted range. The control relay will detect a phase failure even with a regenerated voltage present on the failed phase (no detection on request)