24 VAC phase monitoring relay
The Omron K8AB-AS3-24VAC is a phase monitoring relay designed to detect phase loss, phase reversal, and undervoltage on three-phase systems, powered by a 24 VAC control supply.
Supply voltage and system fit
The 24 VAC supply voltage means this relay is intended for control panels where a 24 VAC transformer is already present — common in older industrial installations or where 24 VDC is not available for the monitoring circuit.
