Description
1. At-A-Glance Executive Brief
- Model / Catalog Number: IRDH265-222 (Series 260)
- Art / Part Number: B91068073
- Brand: Bender (Bender GmbH & Co. KG)
- Part Type: A-ISOMETER Insulation Monitoring Device (IMD)
- Lifecycle Status: Mature / Active Industrial & Marine Support Line
- Core Application: Continuous monitoring of insulation resistance in ungrounded (IT) AC, DC, and mixed AC/DC power systems to prevent unexpected electrical faults and shock hazards
2. Technical Introduction
A degradation of insulation resistance in ungrounded industrial power grids (IT systems) can go unnoticed initially, leading to dangerous double-fault scenarios, unexpected equipment trips, or catastrophic electrical fires.
The Bender A-ISOMETER IRDH265-222 (Part Number: B91068073) is a high-precision insulation monitoring device engineered for demanding industrial, marine, and healthcare IT networks. Part of the reliable Series 260 family, it continuously injects a measuring current to track insulation values between live lines and the protective earth, featuring programmable alarm thresholds and advanced self-diagnostics. Deploying a verified original replacement unit restores early-warning protection and system safety compliance without altering control cabinet layouts.
Engineer’s Takeaway: Procuring an authentic Bender IRDH265-222 monitor ensures precise measurement accuracy, correct response curve configuration, and seamless integration with existing alarm annunciators or fault-location (EDS) systems.
3. Core Technical Specifications
| Parameter | Value |
| Manufacturer | Bender |
| Model / Part Number | IRDH265-222 / Art. No. B91068073 |
| Product Family | A-ISOMETER Series 260 Insulation Monitoring |
| Monitored System Type | Unported AC, DC, and mixed AC/DC IT systems (Unearthed networks) |
| Display & Interface | Digital display with configuration buttons and alarm indicators |
| Mounting Type | Standard DIN rail mounting or panel installation |
| Operating Temperature | -20^\circC to +60^\circC industrial range |
| Enclosure Protection | IP40 (Front panel) / IP20 (Terminals) |
| Net Weight | ~0.38 kg (0.84 lbs) |
4. Field Engineer’s Tech Notes
- System Coupling and Voltage Limits: Verify that the nominal system voltage of your IT network matches the operating envelope of the IRDH265-222 before connection. Improper voltage coupling can saturate the internal measurement circuits.
- Parameter Copying: When replacing a unit in service, match the response value settings (Alarm 1 and Alarm 2 thresholds) precisely to your facility’s safety coordination documentation using the front panel interface.
5. Adaptive QA & Testing Protocol
Every unit undergoes rigorous bench validation prior to dispatch. For the Bender IRDH265-222 monitor, our technicians verify internal power supply stability, test insulation resistance measurement accuracy across simulated fault resistances, and validate relay output switching logic and display responsiveness. Functional test reports or pre-shipment video verification can be provided upon request.
6. Buyer’s FAQ
- Are these insulation monitors supplied as New Surplus or refurbished?
We stock both factory-sealed New Surplus (NSFP) and fully bench-tested, static-safe operational units. Condition status is explicitly marked on every quote.
- What warranty coverage comes with this part?
All replacement Bender safety monitoring devices are backed by a standard 12-month operational warranty from the date of invoice.
- How fast can this module ship to minimize plant downtime?
In-stock items ship same-day via priority air courier services to global destinations, mitigating critical path delays during plant turnarounds or emergency audits.
- Is the IRDH265-222 compatible with external fault location systems?
Yes, this unit is designed to interface smoothly with matching Bender fault location systems (such as EDS packages) to pinpoint specific compromised circuits dynamically.
