The Bender IRDH275B-425 is a state-of-the-art insulation monitoring device designed for unearthed AC, AC/DC, and DC power systems (IT systems). It utilizes the patented AMP Plus measurement principle, making it exceptionally well-suited for modern power supplies, including those with rectifiers, converters, and thyristor controllers, which often have high system leakage capacitances. This device continuously monitors the insulation resistance, providing early warnings of insulation faults to prevent system downtime and enhance electrical safety. The IRDH275B-425 features two separately adjustable response values, a history memory with a real-time clock for storing alarm messages, and an integrated web server for remote configuration and diagnostics, making it a comprehensive solution for critical power applications.