Fanox Overcurrent Feeder

Fanox SIA-F – Overcurrent & Earth Fault Feeder Protection Relay (Auxiliary Supply)

SKU FANOX-SIA-F
Fanox SIA-F is an overcurrent and earth fault protection relay with switched auxiliary power supply for secondary distribution, SF6 metal-clad switchgear, and transformer protection. Compact size, Modbus RTU & DNP3.0 communication, non-volatile memory for 200 events and 4 fault reports.
Technical documents available — View documents
CE Certified
Request Quote

Fanox SIA-F — OCEF Protection Relay for Secondary Distribution

The SIA-F provides reliable overcurrent and earth fault (OCEF) protection for secondary distribution substations and SF6/metal-clad switchgear using a standard auxiliary power supply (no self-power). Its compact design minimises panel space while delivering full ANSI-grade protection functions.

Key Features

  • Auxiliary supply: 24–220 Vdc / 48–230 Vac
  • Standard /1 A (0.5 VA) and /5 A (0.5 VA) CTs
  • Non-volatile memory: 200 events, 4 fault reports, 1 oscillographic record (COMTRADE)
  • Internal RTC (retains date/time without power)
  • Trip output: configurable outputs; 2 digital inputs
  • 3 configurable LEDs; 20×2 LCD + 7-key HMI
  • RS485: Modbus RTU, DNP3.0
  • SICom software compatible
  • Zone interlocking (68), breaker failure (50BF)

Technical Documentation

Datasheets

User Manuals

Protocol Manuals

Installation & Application Guides

Additional Resources