PUB03CW24 Carlo Gavazzi

PUB03CW24, Control relays and Protection Single Phase Voltage Control Max. or Min. AC/DC (TRMS) Models DUB03, PUB03, PUB03CW24, Precise control relays of max. or min voltage level (adjustable by DIP switches) AC/DC with true effective value measurement (TRMS). Its interlocking function allows the relay output to be activated. The inhibition function is used to prevent the operation of the relay when necessary (maintenance operations or adjustments). LEDs indicate the status of the alarm and output relay., PUB03CW24, Dub03 and PUB03 relays measure max. or min. voltages in AC/DC. Example 1 (interlock function off, relay normally off) The relay connects when the measured value is above (or below) the pre-selected level for longer than set. Disconnects when the voltage is below (or above) the pre-selected level (see hysteresis), or when the supply voltage is interrupted. Note If the voltage falls below the minimum supply voltage and the relay is programmed as a minimum voltage, the output contact will not necessarily be at ON, as it has an insufficient supply. Example 2 (interlock function activated, relay normally activated) The relay connects and is stuck in the working position when the measured value is above (or below) the pre-selected level for longer than set. The relay will disconnect when interrupting the supply voltage. The yellow LED flashes until the end of the delay period or until the measured value is back within the non-alarm values (see hysteresis).