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Woodward EGCP-2 8406-121
Woodward EGCP-2 8406-121

Bender EDS460-D-1

Product Name (Extended): Insulation Monitoring with Fault Location for AC/DC IT Systems
Product Introduction: The EDS460-D-1 is part of the EDS system designed to monitor insulation resistance in unearthed (IT) AC, AC/DC, and DC systems and locate insulation faults across multiple measurement channels using external current transformers.
Category:
Description
Technical Specifications:
  • Article Number: B 9108 0001
  • Supply Voltage: DC 16…94 V​ / AC 16…72 V, 42…460 Hz
  • Measuring Range (Response Value): 2…10 mA​ (EDS460 series)
  • Alarm Relays: 2 × 1​ changeover contacts (NO/NC selectable)
  • System Frequency: 42…460 Hz
  • Standards Compliance: DIN EN 61557-8, IEC 61557-8, IEC 61326-2-4, ASTM F1669M-96
  • Event Memory: 300​ events
  • Interface: RS-485​ serial
  • Mounting: Snap-on 35 mm DIN rail​ (W20…/35… type)
    Functional Features: Parallel scanning of all CT-connected branches; continuous CT line monitoring; external test/reset button support; 7-segment display with alarm LEDs; BMS addressing 1…90.
    Performance Parameters: Scans all channels in 10 seconds; adjustable response sensitivity; fault localization accuracy dependent on CT distribution.
    Material Composition: Flame-retardant enclosure; SMT PCB assembly.
    Structural Features: Modular DIN housing; top/bottom terminal access; front panel display and LEDs.
    Working Principle: Injects a measuring current via the system’s existing coupling devices or internal generator; measures leakage to earth across branches via CTs; triggers alarms and logs events when current exceeds set 2…10 mA​ threshold.
    Advantage Highlights: Enables selective fault location without shutting down IT system; high-frequency measurement capability up to 460 Hz; dual alarm relays for staged warnings; compatible with Bender CTs and DI interfaces.
    Applicable Industries: Hospitals (medical IT systems), marine (shipboard power), data centers, industrial plants with IT mains, traction power.
    Model Series: Bender EDS460 / EDS461 / EDS490 / EDS491 Series
    Installation Requirements: Snap onto 35 mm DIN rail​ in cabinet; connect PE​ reference; wire RS-485 with proper termination; connect measurement leads per IT system voltage class (≤94 V DC / 72 V AC​ for D-1).
    Usage Precautions: Verify supply voltage matches 16…94 V DC / 16…72 V AC; do not apply voltages exceeding 276 V​ (reserved for D-2); ensure CT polarity and numbering match addressing; test alarm relays periodically; avoid condensation (operate in <95% RH non-condensing).
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