The BENDER IR470LY-4013 is a high-precision insulation monitoring device (ISOMETER®) designed for de-energized or online monitoring of unearthed AC, AC/DC, and DC systems (IT systems). This specialized industrial component continuously monitors the insulation resistance between the system and the grounding conductor, providing early detection of insulation degradation to prevent unexpected power failures or equipment damage.
Product Overview
The IR470LY-4013 is engineered for complex power systems where high-availability and safety are paramount. It utilizes a sophisticated measurement principle that can accurately detect insulation faults even in systems with high leakage capacitances or significant harmonic distortion. By providing a pre-warning before a total insulation failure occurs, it allows for scheduled maintenance rather than emergency shutdowns, which is critical for continuous industrial processes.
Technical Datasheet & Parameters
| Parameter | Specification |
| Model Number | IR470LY-4013 |
| Manufacturer | BENDER GmbH & Co. KG |
| Monitored System | AC, AC/DC, DC (IT systems) |
| Supply Voltage (Us) | AC 230V (Standard Industrial) |
| Frequency Range | 42–460 Hz |
| Nominal System Voltage (Un) | AC 0–793V / DC 0–650V |
| Response Value (Ran) | 1 kΩ – 1 MΩ (Adjustable) |
| Measuring Voltage (Um) | ≤ 50V |
| Measuring Current (Im) | ≤ 200 µA |
| Operating Temp | -10°C to +55°C |
| Protection Class | IP30 (Enclosure) / IP20 (Terminals) |
Country of Origin
The BENDER IR470LY-4013 is designed and manufactured in Germany.
Application Fields
- Industrial Plants: Monitoring motor feeders, control circuits, and heating systems in IT networks.
- Marine & Offshore: Ensuring insulation integrity on ships, oil rigs, and subsea power systems.
- Power Generation: Insulation monitoring for exciters, generators, and auxiliary systems.
- Railway Systems: Monitoring signaling systems and rolling stock electrical architectures.
- Renewable Energy: Oversight of solar PV arrays and wind turbine power conversion stages.
Technical Description
Technically, the IR470LY-4013 employs the patented AMP (Adaptive Measuring Pulse) measurement method. This allows the device to adapt to the specific leakage capacitances of the monitored system, ensuring high accuracy even in networks with long cable runs or EMC filters. The unit features a built-in LC display for real-time resistance readings and two independently adjustable alarm relays (Pre-warning and Main Alarm). It also includes a test button for self-diagnostics and a reset button to clear latched fault conditions after the insulation issue has been resolved.
Usage Instructions
- Mounting: Secure the device onto a standard 35mm DIN rail within a clean, dry control cabinet.
- Connection: Connect the monitored system terminals (L1, L2, or L+, L-) and the ground (PE) terminal. Use shielded cables if the device is installed in an area with high electromagnetic interference.
- Sensitivity Adjustment: Set the response values (Ran1 and Ran2) according to the specific safety requirements of your facility. Typical industrial settings range from 50 kΩ to 100 kΩ.
- Functional Test: Press the “TEST” button on the front panel to simulate an insulation fault and verify that the alarm relays and LEDs trigger correctly.
- Monitoring: Regularly check the digital display for the current insulation value. If the “ALARM” LED illuminates, initiate a troubleshooting procedure to locate the ground fault using a handheld insulation tester or a portable fault location system.
For more information and technical support regarding the BENDER IR470LY-4013, please visit our product resource page.
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