Phase monitoring relay for three-phase systems
The K8AB-PA1 monitors voltage asymmetry, phase loss, and phase sequence on three-phase supplies. It's a single-function relay output module — SPDT (1 Form C) — with an adjustable delay from 0.1 Sec to 30 Sec. The wide supply range of 115~240VAC lets it work across common industrial voltages without a separate power supply module.
Sourcing reality — discontinued
This part is discontinued. No official successor is listed in the evidence. For replacement, the K8AK-PA1 200/240VAC is a functional peer from the newer K8AK series — same phase monitoring functions, SPDT output, and adjustable delay, but with a 200~240VAC supply and a 5A contact rating instead of 6A. Verify panel wiring compatibility before swapping.
DIN-rail mount, single relay output
Mounts on standard DIN rail. The SPDT relay output is rated 6A @ 250VAC — enough for signaling or driving a small contactor coil. The adjustable delay (0.1~30 seconds) helps avoid nuisance trips during motor startup or temporary voltage dips.