IRDH275-435 BENDER Controller module

Description

IRDH275-435 BENDER Controller module

Product Dimensions：

Product Description

The IRDH275-435 is an insulation monitoring device used to monitor the insulation resistance of AC, DC, and AC/DC IT systems. It is particularly effective in systems containing high-power electronics, such as frequency converters or large DC rectifiers. It uses the AMP (Adaptive Measuring Pulse) technology to filter out interference and provide stable readings even in systems with high leakage capacitance.

Technical Parameters

The “435” variant typically denotes specific voltage or terminal configurations. Below are the standard technical specifications for this model:

Product Advantages

• AMP Measurement Technology: Unlike simple DC-pulse monitors, the AMP method adapts to the system frequency and interference, preventing “nuisance” alarms.
• Dual Alarms: Features two independently adjustable response values (Pre-warning and Main alarm).
• Analog Output: Includes a 0/4–20 mA or 0–10 V output, allowing you to send the insulation resistance value to a PLC or external display.
• Automatic Adaptation: The device automatically adjusts to the system’s leakage capacitance, ensuring accurate measurements without manual calibration.
• Self-Monitoring: It continuously monitors its own connection to the system (L1/L2) and the earth (PE) to ensure the device is actually “watching” the system.

Product Applications

The IRDH275-435 is widely used in heavy industry:

• Variable Speed Drives (VSD): Monitoring circuits controlled by frequency converters.
• DC Power Plants: Large battery systems and industrial DC buses.
• Chemical/Heavy Industry: Continuous processes where a power outage would cause significant financial loss.
• Ships and Offshore: Reliable monitoring for marine electrical distribution.

Important Considerations (Precautions)

• Coupling Requirements: For systems exceeding AC 793 V or DC 1100 V, you must use an external coupling module (e.g., AGH204 or AGH504).
• Installation Geometry: Ensure the device is mounted in a well-ventilated area. In legacy panels, ensure the terminal connections (especially the 435-specific terminals) are torqued correctly.
• Test/Reset Buttons: Regular testing via the front panel “TEST” button is recommended to verify the internal relay logic.
• Avoid Parallel Devices: Just like the newer models, you cannot have two IRDH275 devices active on the same galvanically connected system at once.

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