Fanox Compact Directional

Fanox SIU-C – Voltage & Frequency Protection Relay for HV/MV/LV Systems

SKU FANOX-SIU-C
Fanox SIU-C is a voltage and frequency protection relay for transformers and electrical machines in HV, MV, and LV systems. 5 voltage channels; measures up to 1,000 V directly on LV line. Islanding/Loss-of-Main (ROCOF) protection; IEC60870-5-104, Modbus TCP. 9 analog + 96 digital oscillographic channels.
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Fanox SIU-C — Voltage & Frequency Protection Relay for Transformers & Machines

The SIU-C delivers comprehensive voltage and frequency protection for transformers, generators, motors, and electrical machines across HV, MV, and LV systems. Its five voltage channels and direct LV measurement capability (up to 1,000 V) make it uniquely versatile.

Key Features

  • Auxiliary supply: 24–230 V DC/AC
  • 5 voltage channels for conventional VTs; direct LV measurement up to 1,000 V
  • Protection against decoupling, load shedding, and Loss of Main (islanding) — voltage, frequency & ROCOF
  • Circuit breaker (52) and recloser (79) signalling/control
  • Front keypad: 7 navigation keys + 6 programmable hotkeys; 3 configurable + 8 programmable alarm LEDs
  • Oscillography: 9 analogue + up to 96 digital channels (COMTRADE); downloadable via SICom
  • Communication: Front micro-USB; Rear serial – Modbus RTU, IEC60870-5-103, DNP3.0; Rear Ethernet – Modbus TCP, DNP3 TCP, IEC60870-5-104, IEC61850, SNTP, Web Server
  • Wide EMC-rated metallic housing; extended operating temperature range

Technical Documentation

Datasheets

User Manuals

Protocol Manuals

Additional Resources