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BENDER IRDH575B2W-435 – Isometer Insulation Monitoring Device
Product Overview
The BENDER IRDH575B2W-435 is a high-performance isometer insulation monitoring device designed for unearthed AC, DC, and AC/DC IT systems. It monitors insulation resistance between system conductors and earth, triggering alarms when resistance falls below set values to prevent equipment damage and operational downtime. Equipped with an integrated test generator and controller for EDS insulation fault location systems, it simplifies fault detection and localization. The device features an LCD display for real-time data visualization and supports remote parameterization, making it suitable for industrial environments with demanding electrical safety requirements.
Technical Specifications — IRDH575B2W-435
| Parameter | Value |
|---|---|
| Product Model | IRDH575B2W-435 |
| Manufacturer | BENDER |
| Product Type | Isometer Insulation Monitoring Device |
| Power | AC 88–264 V / DC 77–286 V |
| Communication / Protocol | RS-485 (BMS) |
| Operating Temperature | Not specified |
| Mounting | Panel mounting |
| Dimensions (HxWxD) | 96 x 144 mm (HxW), depth not specified |
| Weight | Not specified |
| Typical Interfaces | RS-485, alarm relay contacts |
| Compliance | Not specified |
BENDER IRDH575B2W-435
Key Features and Benefits — IRDH575B2W-435
- Monitors insulation resistance in 3(N) AC, AC/DC, and DC IT systems, adapting automatically to system leakage capacitance.
- Two separately adjustable alarm relays (N/C or N/O) enable distinction between pre-warning and alarm signals, enhancing safety.
- Integrated test generator supports automatic or manual insulation fault location when paired with EDS series evaluators and current transformers.
- Stores up to 99 alarm messages with date and time for traceability and maintenance reference.
- LCD display shows measured values and fault information, with an info key for additional system data (e.g., leakage capacitance).
- Remote parameterization via PC (with FTC 470 XET converter) allows flexible settings adjustment without on-site access.
Related Models
- IRDH575B1W-435: Isometer insulation monitor for 3(N) AC/DC 20–575 V systems with LCD display and alarm function.
- IRDH575B2-435: Non-display version of the IRDH575B2 series, supporting 3(N) AC 340–760 V / DC 340–575 V systems.
- IRDH575B1-435: Basic insulation monitor for 3(N) AC/DC 20–575 V systems without display functionality.
- IRDH575B2W-4935: Variant supporting 3(N) AC/DC 340–760 V systems with enhanced fault location capabilities.
Installation and Maintenance — IRDH575B2W-435
- Mount the device on a standard panel; optional panel seal (IP 42) or transparent front cover (IP 65) is available for dust and moisture protection.
- Connect to the IT system conductors and earth as per BENDER installation guidelines, ensuring proper wiring for alarm relays and communication interfaces.
- Perform regular self-tests using the test button to verify device functionality and connections.
- Reset fault memory via internal or external reset button after resolving insulation issues.
- Remote parameterization and monitoring reduce on-site maintenance needs, while stored alarm data aids in troubleshooting.
