Product Images ULATS Broadest selection of ULT 1008 Listed automatic transfer switches in the market, which deliver a host of features and benefits to meet your application needs, including: Contactor and circuit breaker construction. Open-delayed, open-in-phase & closed transition switching. Bypass isolation type. Three tiers of automatic transfer switch controllers. Integrated service entrance option. Field Adaptable Design Industry-leading UL 1008 Listed withstand close-on ratings. Easy integration into switchboards and motor control centers. Three-source switching solutions.