Constructed inside a rugged, high-dielectric case with terminal studs, the USI™ Trip Indicating Relay (TIR) is one of several USI™ premier accessories. This accessory provides outstanding quality connections with any connection. The USI™ TIR features millisecond actuation, high current capability, low resistance, and high switching capacity. Additionally, the TIR is not only low-cost, but also simple to install. The TIR has multiple functions, including alarm indication, annunciation, event recording, breaker, relay, and communication.

Also, a USI™ TIR is activated by sensing the presence of currents in a trip coil. Because of this the trip coil can handle extreme current overloads and features a high-speed contact closure time. Its special design is ideal for use with protective relays and circuits associated with DMEs (specifically the DFR application). To fit your company’s specific needs, USI™ TIRs are available in multiple arrangements, both pre-manufactured and customer-specific.(Click the View Screenshots link below).