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Dixell IPG315D
Dixell IPG315D
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Bender IRDH275-435
Bender IRDH275-435

Bender IRDH265-2

  • Product Name: Insulation Monitoring Device (IMD) for Medical/Industrial IT Systems
  • Product Introduction: A high-sensitivity monitor for unearthed (IT) AC/DC networks, measuring system-to-earth insulation resistance to prevent shock or fire hazards.
Category:
Description
  • Technical Specifications & Performance Parameters:
    • System Voltage: AC 0-460V (50/60Hz), DC 0-650V.
    • Measuring Range: 0.1 kΩ to 999 kΩ.
    • Accuracy: ±5% (10kΩ-500kΩ).
    • Response Time: ≤0.5 sec (medical grade).
    • Outputs: 3 x Relays (AL1 fault, AL2 device error, AL3 pre-alarm), 5A/250VAC.
    • Communication: RS485 Modbus RTU.
    • Supply: 230V AC ±15% or 24V DC.
    • Environment: -25°C to +70°C, IP20.
  • Functional Features:
    • Dynamic Frequency Shift (DFS): Avoids interference from variable frequency drives.
    • Test Current: ≤25 µA (safe, imperceptible).
    • Display: 4-digit LED for Riso, tri-color LEDs for status.
    • Memory: ≥500 event logs with timestamp.
  • Application Scenarios: Hospital operating theaters (IT medical systems), data center UPS, crane/port IT networks.
  • Material & Structural Features: DIN rail housing (35mm), polycarbonate front with display, terminal block connections.
  • Working Principle: Injects a low-frequency DC or pulsed test voltage/current into the IT network via coupling; measures returning current to calculate total insulation resistance (Riso); triggers relays if Riso drops below setpoints.
  • Installation Requirements: Mount on DIN rail in distribution board; connect measuring terminals across IT system (L1/L2/L3-PE or +/−-PE); use shielded twisted pair for RS485.
  • Usage Notes: Default thresholds usually 50kΩ (warn), 30kΩ (trip) per IEC 60364; do not connect to grounded (TN/TT) systems. Perform automatic self-test every 24h verification.
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