Bender IRDH575B1-427 Insulation Monitoring Device for IT System

Description

Bender IRDH575B1-427 Insulation Monitoring Device for IT System

Product Dimensions：

The Bender IRDH575B1-427 is an advanced, high-performance Isometer designed for insulation monitoring in ungrounded AC, AC/DC, and pure DC systems (also known as IT systems). Manufactured by Bender, a global leader in electrical safety, this device is crucial for identifying insulation degradation before an actual electrical fault or system shutdown occurs.

Product Detailed Description

The IRDH575B1-427 utilizes Bender’s patented AMP Plus (Adaptive Measuring Pulse) measurement principle. This allows the device to adapt dynamically to high system leakage capacitances (caused by long cables, noise filters, etc.), which typically confuse standard insulation monitors.

The “427” variant is optimized for specific supply and measurement voltages, making it ideal for monitoring complex, modern industrial networks that include frequency converters, variable speed drives, and large DC rectifiers.

Technical Parameters

Product Advantages

• AMP Plus Technology: Perfectly handles systems with high system leakage capacitances (C_e) and heavy harmonic distortion from variable frequency drives (VFDs) without giving false alarms.
• Dual Alarm Thresholds: Features two independent response values (R_{an1} for pre-warning, R_{an2} for main alarm), allowing for early maintenance scheduling before a total system shutdown occurs.
• System Connectivity: Includes built-in interfaces (such as the RS-485 based BMS bus) to communicate with external alarm indicator panels or centralized SCADA software.
• Self-Monitoring Feature: Automatically checks its own internal connections and the connection to the system ground/earth; if a wire break or internal fault is detected, it alerts the operator immediately.

Important Considerations & Precautions

• Single Connection Per Network: Only one insulation monitoring device may be connected to an interconnected IT system. Connecting multiple units simultaneously will cause them to interfere with each other’s measuring pulses, leading to false readings.
• Insulation (Megger) Testing: If you perform high-voltage insulation tests on your distribution system, you must disconnect the IRDH575 from the system beforehand. The high voltage used during a megger test will damage the device’s sensitive input electronics.
• Proper Grounding: The module requires a distinct, highly reliable connection to both the system grounding bus and the operational earth. A loose earth connection will prevent the device from measuring insulation resistance accurately.

Product Applications

The IRDH575B1-427 is deployed where operational continuity and fire safety are non-negotiable:

• Industrial Automation: Protecting critical assembly lines, continuous processing plants, and automation equipment utilizing VFDs.
• Marine and Offshore: Monitoring ungrounded onboard electrical systems on ships, submarines, and offshore oil platforms where a first ground fault must not trip the breaker.
• Renewable Energy: Insulation monitoring in large photovoltaic (solar) arrays and wind turbine power circuits.
• Mining Operations: Providing safety monitoring for mobile equipment, conveyor belts, and deep underground distribution grids.

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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