The Bender ISOMETER® IRDH275 is a state-of-the-art insulation monitoring device designed for unearthed AC, AC/DC, and DC power systems (IT systems). It is particularly suited for modern power systems that include variable-speed drives, rectifiers, or inverters, which can introduce high leakage capacitances. Utilizing the patented AMP Plus measurement principle, the IRDH275 automatically adapts to the specific system conditions to provide precise and reliable insulation resistance measurements. It features a high-resolution graphical LC display for clear visualization of the insulation value, system parameters, and historical data. With two separately adjustable response relays, it allows for pre-alarm and main alarm settings, enhancing predictive maintenance and ensuring maximum operational safety and system availability.