PUB02CT23 Carlo Gavazzi

PUB02CT23, Monitoring Relays 1-Phase True RMS AC Over/Under Voltage Types DUB02, PUB02, PUB02CT23, DUB02 and PUB02 are precise TRMS AC window voltage monitoring relays. The relays monitor their own power supply which is selectable by DIP-switch (24, 115 or 230 VAC). The advantage of using the latch function is that the relay can be kept energized even after the end of the alarm condition. Inhibit function can be used to avoid relay operation when not desired (maintenance, transitions). The LED's indicate the state of the alarm and the output relay., PUB02CT23, DUB02 and PUB02 monitor the TRMS value of their own power supply. Example 1 (no connection between terminals Z1, Z2 or 8, 9 - Delay ON alarm - N.E. relay) The relay operates and the yellow LED is ON as long as the measured value is within the upper and lower limits. The relay releases after the adjustable time delay when the measured voltage exceeds the upper set level or drops below the lower set level. The red LED flashes until the delay time has expired or the measured value falls off the limits. Example 2 (connection between terminals Z1, Z2 or 8, 9 - latching function enabled - delay on recovery - N.E. relay) The relay operates and the yellow LED is ON as long as the measured value is within the upper and lower limits. The relay releases and latches in alarm position as soon as the measured voltage exceeds the upper set level or drops below the lower set level. Provided that the voltage has dropped below the upper set level (minus hysteresis) or exceeded the lower set level (plus hysteresis) for more than the set delay time, the relay operates when the interconnections between terminals Z1, Z2 or 8, 9 are interrupted. The red LED flashes until the delay time has expired or the measured value falls off the limits.