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ESP SSI Series

The ESP SSI Series is a combined Category D, C, B tested data link protector and Combined Type 1, Type 2 and Type 3 tested mains protector (to BS EN 61643) suitable for Solid State Interlocking (SSI) mains power and data links. Protectors are Network Rail approved.

For use on lines at boundaries from LPZ 0 through to LPZ 3 to protect sensitive electronic equipment.

Features & benefits

  • Accepted for use on Network Rail infrastructure. NRS PADS references: ESP SSI/M - 086/047066; ESP SSI/B - 086/047067; ESP SSI/120AC - 086/047058 and ESP SSI/140AC - 086/047059 (Network Rail Approval PA05/00471)
  • Very low let-through voltage (enhanced protection to IEC/BS EN 62305) between all sets of conductors - Full Mode protection (ESP SSI/120AC and ESP SSI/140AC) and all signal lines (ESP SSI/M)
  • ESP SSI/B (or ESP SSI/B/G) modified base can be permanently wired into the system
  • ESP SSI/M plug-in protection module can be replaced without interfering with the operation of the system
  • ESP SSI/B (or ESP SSI/B/G) incorporates a 100 Ω terminating resistance that can be connected if required
  • ESP SSI/B (or ESP SSI/B/G) can be flat mounted, or a built-in DIN rail foot allows simple clip-on mounting to top-hat (ESP SSI/B) or G DIN rails (ESP SSI/B/G)
  • ESP SSI/120AC and ESP SSI/140AC are a compact size for easy installation in trackside cabinets and control rooms
  • ESP SSI/120AC and ESP SSI/140AC have three way visual indication of protector status and advanced pre-failure warning