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Istec SpeedSys 300 - SIL 3 overspeed protection module

Istec SpeedSys 300 · SSY300-000-000 · overspeed protection module · 0-35 kHz · SIL 3 by design · speed signal to relay, open collector and analog outputs · single channel or voting structures


The SpeedSys 300 is a SIL 3 rated overspeed protection system for rotating machinery. It delivers the core layer of protection with a compact architecture. Its small technical footprint enables low-impact retrofitting and extends the range of machinery which can be protected.

Advanced overspeed protection for a wide range of applications

The system architecture is designed for versatility. A single module can offer a reliable and economical solution for overspeed protection. For more demanding applications or increased availability, redundancy and voting structures can be created.
Typical applications include:
  • Compressors and pumps
  • Microturbines
  • Wind turbines
  • Gas- and steam turbines
  • Hydroelectric power stations

  • Safety system by design

  • Fast reaction time to overspeed – 8 ms
  • 2 safety relays + 1 safety analog output per module
  • External voting for redundant configurations
  • Advanced self-monitoring and diagnostics
  • 10 year proof test interval (typical)

  • Standards

    Industrial standards:
  • API670 and API612 compliant
  • SIL 3 certified (IEC 61508)
  • ATEX (IECEx) Zone 0,1,2 (EX-ia) (input only)

  • International standards:
  • Europe: CE
  • USA/Canada: cMETus; FCC

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