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GE DS3800HRRA1D1B

Brand:​ General Electric
Product Name:​ DS3800 HRRA Relay / Trip Output Driver Board
Platform:​ Mark IV Speedtronic DS3800 protection family
  • Product Brief:​ High-reliability relay driver and voting output board that energizes trip solenoids, alarm relays and annunciator contacts from TMR-protect logic.
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Detailed content

  • Technical Specifications:
    • Outputs: multiple SPDT/SPTD power relays (125 VDC coil drive)
    • Inputs: TTL/CMOS protect-vote lines from HMPF/VPRO
    • Isolation: relay coil vs contact 1500 VAC
    • Response: < 20 ms including relay pull-in
    • Power: +5 VDC logic, 125 VDC field
    • Temp: –40 °C to +70 °C
  • Features:​ Self-test relay, mechanical flag indicator, fuse-protected outputs.
  • Application:​ Turbine emergency trip, overspeed solenoid drive, fire-safe shutdown.
  • Installation / Notes:​ Verify trip-path de-energized state per site SIS design; test relay once per outage; never bypass voter inputs.

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