Control relay for phase failure and thermistor protection R The TCP-M monitors phase sequence, phase failure and phase asymmetry, and is used with PTC sensors to provide over temperature protection for motors and other equipment. When the phase sequence is correct, all phases are detected, and the resistance of the PTC sensors on the input T1 – T2 is within the correct range, the output relay energises. At a loss of one phase (> Vn x 0.75 ), or the detection of an asymmetry imbalance >10%, or when the resistance of the PTC sensors exceeds the triggering threshold (3100 Ohm) the reaction time starts. At the end of time the output relay de-energises. Time is adjustable between 0.1s and 10s and is used to time out short transients which would otherwise cause nuisance tripping. The relay energises again when phase L1, L2 and L3 return to the correct range and the resistance of the sensors falls below the reset threshold (1650 Ohms). The control relay will detect a phase failure even with a regenerated voltage present on the failed phase

• · phase sequence phase asymmetry and over-temperature using PTC sensors. It can be powered with the following voltages of 3x 400VAC.
• · relay and reaction timer and 45mm DIN rail mount housing.
• · Features LED indicators for power supply
• · all phases are detected and the resistance of the PTC sensors on the input T1 – T2 is within the correct range
• · the output relay energises. At a loss of one phase (> Vn x 0.75 ) or the detection of an asymmetry imbalance >10% or when the resistance of the PTC sensors exceeds the triggering threshold (3100 Ohm) the reaction time starts.
• · Detects phase failure with regenerated voltage present
• · Phase failure
• · PTC thermistor over temperature
• · No neutral connection required
• · DPCO Output max. 6a