BENDER IRDH265-4 B91068001

Bender IRDH265-4 A-ISOMETER Description The Bender IRDH265-4 is an advanced insulation monitoring device designed for unearthed AC, AC/DC, and DC power systems (IT systems). It provides continuous monitoring of the insulation resistance to prevent system downtime and protect against electrical hazards. With its wide voltage range and adjustable response values, this device is a versatile solution for a multitude of industrial applications. Order now from profideals for expert support and fast delivery. Specifications Manufacturer: Bender Type: IRDH265-4 Part Number: B91068001 System Type: Unearthed systems (IT systems) Rated Voltage (Un): 3AC/AC 0…690V, DC 0…500V Supply Voltage (Us): 230V AC, 50/60Hz Power Consumption: 6.0 VA Response Value (RAN1, RAN2): 10…990 kOhm Relay Contacts: 2x changeover contacts, AC 250V / 5A Display: LCD for measured value and device parameters Label Info Model: IRDH265-4 Serial No.: 0205509925 Article No.: B91068001 Software Version: D74 V2.8-4 Application This insulation monitor is ideal for critical applications where power supply continuity is essential, including hospitals (operating rooms), industrial control systems, renewable energy installations (solar, wind), and marine applications. Country of Origin Germany CO2 Impact Opting for this pre-owned unit prevents the emission of approximately 20.0 kg of CO2, which is comparable to the savings from not driving a car for 100 kilometers. Availability This item is a tested, used product in excellent working condition. Lifecycle status is ‘Obsolete’, making this a valuable spare part for existing installations. FAQ Can the IRDH265-4 be used in DC systems?Yes, the IRDH265-4 is suitable for unearthed AC, combined AC/DC, and pure DC systems. The rated voltage for DC applications is up to 500V. What is the purpose of the two alarm relays?The device features two independent alarm relays (ALARM 1 and ALARM 2). This allows for setting up a pre-alarm and a main alarm at different insulation resistance thresholds, enabling a two-stage warning system for proactive maintenance. Is this device compatible with modern communication protocols like Modbus?The standard IRDH265-4 model does not have built-in Modbus or other digital communication protocols. It operates via its relay contacts. For network integration, you would need a different model or a gateway device. profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners. Last Update: Friday, March 13, 2026