1SAM201904R1004

Supplied by Ahmedabad Electric Corporation, the ABB UA1-110 is a side-mounting undervoltage release mechanism engineered to automatically trip ABB Manual Motor Starters (including MS116, MS132, and MS165 series) during control voltage drops or complete power outages. Rated for a dual-frequency control supply of 110V at 50Hz and 120V at 60Hz, the UA1-110 undervoltage release disconnects connected 3-phase electric motors from the main power grid whenever the supply voltage falls below acceptable operating limits. This crucial fail-safe capability prevents un-monitored, hazardous motor auto-restarting when mains power is restored, ensuring operator safety and protecting equipment from phase-drop conditions. Designed for straightforward side mounting directly onto the manual motor starter frame, it features robust screw terminals for secure control 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 UA1-110 delivers reliable performance across demanding industrial environments.