1SAM201904R1005

Supplied by Ahmedabad Electric Corporation, the ABB UA1-230 is a side-mounting undervoltage release trip unit designed for automatic fail-safe protection and emergency isolation of ABB Manual Motor Starters (including MS116, MS132, and MS165 series). Engineered for standard single-phase AC control supplies operating at $230text{ V}$ at $50text{ Hz}$ and $240text{ V}$ at $60text{ Hz}$, the UA1-230 automatically trips the attached manual motor starter whenever the main or control voltage drops significantly below permissible levels. This crucial safety function prevents dangerous, un-monitored motor auto-restarting upon voltage restoration, thereby safeguarding both machine operators and driven industrial equipment from phase failure or brownout damage. Designed for effortless side mounting directly onto the manual motor starter frame, it incorporates robust screw terminals for reliable, vibration-proof electrical wiring. Built with a rated insulation voltage ($U_i$) of $690text{ V}$ and an operational ambient temperature range from $-25^circtext{C}$ to $+60^circtext{C}$, the UA1-230 guarantees reliable, high-speed tripping performance across harsh industrial panel environments