Three-phase monitoring relay
The K8AK-PM1 200/240VAC packs voltage asymmetry, phase loss, and phase sequence monitoring into a single DIN-rail module, saving panel space over three separate relays. Adjustable delay from 0.1 to 30 seconds lets you filter out transient sags that don't warrant a trip. The 200-240VAC supply ties it to the control transformer, so it monitors the same bus the contactor coils run on.
Mounts on standard DIN rail; the two SPDT relay outputs (5A at 250VAC) are typically wired to drop a main contactor or trigger an alarm. Rated for -20°C to 60°C ambient, so it's fine inside most panel enclosures without forced cooling.