Phase loss monitoring relay TCP-V series

DPCOthree-phaseAC

• detects phase failure or reduction of phase voltage normal or inverted function available • constant measuring TCP-V U =U x 0.7 PCP-V U =U x 0.7 TCP-V-I U =U x 0.85 • will not trip with regenerated voltage present • adjustable reaction timer 0.1 - 10s • LED indicators for power supply,relay and reaction timer The TCP-V is a phase failure relay for monitoring 4-wire, 3-phasesystems for phase failure or phase voltage reduction down toVn x 0.7 or less. When the control relay detects all 3 phases withinthe correct range, the output relay energises.At a loss of one phase (> 30% under nominal voltage) the reactiontime starts. At the end of time the output relay de-energises.Time is adjustable between 0.1s and 10s, and is used to time outshort transients which would otherwise cause nuisance tripping.The relay energises again, when phase L1, L2 and L3 return to thecorrect range. The TCP-V may be used for monitoring a 1-phase system, in which case L1, L2 & L3 must be connected together (see below).