SIPROTEC 7SJ66

The SIPROTEC 4 7SJ66 is a numerical protection, control and monitoring device. 

Basic Features

  • Features “flexible protection functions”
  • Up to 20 protection functions can be added if required (e.g. rate-of-frequency-change protection, reverse power protection)
  • Provides control of circuit breakers, further switching devices, and automatic functions
  • Integrated programmable logic (CFC) allows users to implement their own functions (e.g. for the automation of switchgear – interlocking)
  • Communication interfaces support easy integration into modern communication networks