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Bender IRDH275-435
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Bender IRDH265-2
Bender IRDH265-2
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GE IC697RCM711
GE IC697RCM711

Bender IRDH275-435

  • Product Name: Advanced Insulation Monitoring Device (IMD) with Extended Voltage/Diagnostics
  • Product Introduction: An enhanced successor/variant in the Bender IRDH family, supporting mixed AC/DC systems and higher voltage ranges with fault localization capability.
Category:
Description
  • Technical Specifications & Performance Parameters:
    • System Voltage: 0-793V AC / 0-650V DC (expandable to 7200V AC / 1760V DC with coupler MK2430).
    • Measuring Range: 1 kΩ to 10 MΩ.
    • Accuracy: ±1kΩ (1-10kΩ), ±10% (>10kΩ).
    • Outputs: 2 x Adjustable relay thresholds, 1 x 4-20mA analog.
    • Communication: RS485 Modbus RTU.
    • Memory: Up to 300 event records (timestamped).
    • Environment: -40°C to +70°C, IP20/IP30.
  • Functional Features:
    • AC/DC Mixed: Monitors systems with rectifiers, VFDs, UPS.
    • Branch Localization: Works with EDS series locators to find faulted feeder.
    • Trend Analysis: Internal logging of Riso drift.
  • Application Scenarios: Railway traction power (AC/DC), solar PV inverters, mining equipment, marine main switchboards, hospital complexes.
  • Material & Structural Features: Standard DIN housing, wide-temperature components, robust screw terminals.
  • Working Principle: Similar to IRDH265 but employs advanced adaptive measurement techniques to distinguish between pure AC, pure DC, and mixed pollution leakage currents; uses network analysis to separate capacitive/resistive components.
  • Installation Requirements: DIN rail mount; if system >793V AC, install external voltage coupler (MK series) between network and IRDH275; ensure PE connection is low impedance.
  • Usage Notes: When using with VFDs, verify that the measuring frequency does not coincide with drive switching noise; adjust measurement method via DIP/menu if false alarms occur. Regularly check coupler integrity in high-voltage setups.
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