Bender IR423-D4W-2 Insulation Monitoring Device

Description

Bender IR423-D4W-2 Insulation Monitoring Device

Product Dimensions：

The Bender IR423-D4W-2 is a high-performance, microprocessor-controlled Insulation Monitoring Device (also known as a ground fault detector). It is part of Bender’s A-ISOMETER® family and is designed to continuously monitor the insulation resistance of ungrounded AC, DC, or AC/DC systems (IT systems).

Product Detailed Description

The IR423-D4W-2 is specifically engineered to detect insulation faults in complex, non-grounded electrical systems, even when high system leakage capacitances (C_e) are present. It injects a specialized measuring signal into the system to calculate the insulation resistance (R_f) between the active conductors and the earth (ground).

The module features a compact, DIN-rail mountable enclosure with a digital display that provides real-time resistance values and simplifies configuration.

Technical Parameters

Product Advantages

• Early Fault Detection: By continuously reading exact insulation resistance values, it detects deteriorating insulation before a costly short-circuit or trip occurs.
• AMP Measuring Principle: Utilizes Bender’s patented Adaptive Measuring Pulse (AMP) technology, allowing it to adapt to complex DC components, variable speed drives, and fluctuating system capacitances without causing false alarms.
• Two Independent Alarms: Offers Pre-alarm (Alarm 1) and Main Alarm (Alarm 2) thresholds so maintenance teams can plan repairs before a critical shutdown is triggered.
• Self-Monitoring: The device continuously runs internal self-tests on its connection to the system and earth, ensuring the safety monitor itself is always functional.

Important Considerations & Precautions

• Single IT Systems Only: The IR423 must only be connected to ungrounded (IT) networks. Do not connect it to grounded systems (TN/TT systems) as this will skew the readings and could damage the unit.
• One Device Per Interconnected Network: Only one insulation monitoring device can be connected to the same electrical network. If multiple devices are active on the same isolated bus, their measuring pulses will interfere with each other, leading to completely inaccurate readings.
• Dielectric Testing: Disconnect the IR423-D4W-2 from both the monitored network and the ground connection before conducting high-voltage insulation tests (e.g., Megger tests) on the system.

Product Applications

The Bender IR423-D4W-2 is vital for industries where operational continuity is paramount and a first ground fault must not shut down the system:

• Industrial Automation: Control circuits for assembly lines, chemical processing, and automated machinery.
• Renewable Energy: Monitoring ungrounded DC strings and AC inverters in solar (PV) farms and wind turbines.
• Maritime & Offshore: Electrical systems on ships, oil rigs, and marine vessels where sudden blackouts present extreme danger.
• Medical Facilities: Power supplies for critical care areas (operating rooms/ICUs) using isolated power systems (IPS).

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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