BENDER IRDH575B1W-435 Insulation Monitor

Product Description

BENDER IRDH575B1W-435 (ISOMETER®) is an insulation monitoring device for unearthed IT systems from Bender Germany, part of IRDH575 series. It is equipped with backlit LCD display, continuously monitoring insulation resistance for AC, DC and mixed AC/DC unearthed networks. It can work with EDS insulation fault locators to identify fault branch. It features two-stage alarm relays, RS485 BMS interface and configurable 4…20mA analog output, with built-in test, reset and comprehensive self-diagnosis. It is suitable for complex power networks with converters and variable frequency loads, widely used as safety instrument for medical, mining, marine and new energy IT circuits.

Technical Parameters

• Brand: BENDER (Germany)
• Model: IRDH575B1W-435
• Series: ISOMETER® IRDH575
• Product Type: Insulation Monitoring Device for IT systems
• Rated System Voltage: AC / 3AC 20~575V, DC 20~575V, 50–460Hz
• Auxiliary Supply: AC 88–264V / DC 77–286V
• Response Range: 1 kΩ ~ 10 MΩ, two adjustable alarm thresholds
• Display: Backlit 4×16 character LCD
• Communication: RS485, BMS protocol
• Analog Output: Isolated 0/4–20mA, configurable
• Relay Output: 3 changeover contacts (Alarm1, Alarm2, System Fault)
• Compatible Locator: EDS460 / EDS470 / EDS490 series
• Cutout Size: 144×96 mm, panel flush mount
• Protection Class: Front IP42 (IP65 with transparent cover), terminals IP20
• Operating Temperature: -20℃ ~ +60℃
• Storage Temperature: -25℃ ~ +70℃
• Functions: Insulation resistance measurement, leakage capacitance display, self-test, fault logging
• Standards: IEC 61557-8, IEC 60601-1 (medical variant)
• Lifecycle: Active standard product, common spare for industrial, medical and marine projects

Application

1. IT power supply for hospital operating rooms and ICUs;
2. Unearthed power distribution for underground mines, tunnels and rail transit;
3. Marine vessels, offshore platforms and shore power IT networks;
4. PV, energy storage and EV charging DC unearthed systems;
5. Chemical and metallurgical plants with VFD and rectifier loads;
6. Replacement for failed IRDH575 series insulation monitors.

Similar Series Models

IRDH575B1-435, IRDH575B1-4235, IRDH575B1W-4227, IRDH575B2-435, IRDH275, IR427