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Product name：IR470LY-4021 Bender output module
Product details:
The Bender IR470LY-4021 is a high-precision Insulation Monitoring Device (IMD) designed for unearthed systems (IT systems). It is specifically engineered to monitor the insulation resistance between the system and ground, providing early warnings of insulation degradation to prevent system failures or electrical hazards.
Key Product Specifications
The IR470LY series is known for its reliability in industrial environments. Below are the primary technical parameters:
| Parameter | Specification |
| Monitored System | AC, DC, or AC/DC unearthed systems (IT systems) |
| Nominal System Voltage ($U_n$) | AC 0…793 V / DC 0…1100 V |
| Supply Voltage ($U_s$) | AC 230V (standard for -4021 variant) |
| Response Value ($R_{an}$) | 1 kΩ…10 MΩ (adjustable) |
| Measuring Principle | AMP (Adaptive Measuring Pulse) technology |
| Output Contacts | 2 separate alarm relays (Form C) |
| Enclosure Type | DIN rail mounting or screw mounting |
| Display | Analog or Digital (depending on specific sub-configuration) |
Product Advantages
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Advanced AMP Technology: Unlike basic monitors, this device uses an adaptive measuring pulse that allows it to work accurately in systems with high leakage capacitances or modern power electronics (variable speed drives).
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Early Fault Detection: By detecting insulation drops before a short circuit occurs, it enables “predictive maintenance,” reducing unplanned downtime.
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Versatility: Capable of monitoring mixed AC/DC systems, making it ideal for complex industrial grids.
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Reliability: Robust design ensures stable performance even in environments with high electrical noise or harmonic distortion.
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Automatic Adaptation: The device automatically adjusts to the system’s leakage capacitance to ensure the fastest possible response time.
Safety Precautions & Maintenance
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Professional Installation: Installation and commissioning must be performed by qualified electrical personnel only.
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Voltage Limits: Ensure the system voltage does not exceed the maximum rated voltage of the device ($1100V$ DC / $793V$ AC).
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Isolation Testing: Before performing high-voltage insulation tests on the monitored system, the IR470LY must be disconnected to avoid damage to the internal measuring circuit.
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Proper Grounding: Ensure the connection to the PE (Protective Earth) is secure and has low impedance for accurate measurement.
Typical Applications
The Bender IR470LY-4021 is widely used in critical sectors where power continuity is essential:
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Industrial Plants: Chemical, oil & gas, and manufacturing facilities using IT power systems to prevent sudden shutdowns.
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Renewable Energy: Monitoring insulation in large-scale solar (PV) arrays and battery storage systems.
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Marine & Offshore: Power distribution systems on ships and oil rigs where grounding faults can be catastrophic.
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Railway Systems: Signaling and power supply systems for rolling stock and infrastructure.
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Mining: Monitoring mobile machinery and underground power grids.
Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!
We have the same series of models in stock. If you don’t find the model you need, please contact us and we will provide you with an official quotation！
Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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