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Multilin 339

Intuitive motor protection

 Designed for medium voltage motors in industrial applications, the 339 delivers unparalleled protection, control, diagnostics and communications in an industry leading draw-out construction. Providing simplified setup configuration through the use of the Motor Settings Auto-Configurator, advanced graphical diagnostics with the Motor Health Report and support for multiple communication protocols including IEC 61850, the 339 Motor Protection System provides unparalleled motor protection for most small and medium sized AC motors.

Key Benefits

  • Enhanced Thermal Model including RTD and current unbalance biasing
  • Time stamped event reports, waveform capture, motor start and motor trending
  • Security Audit Trail capturing setting and command changes
  • Powerful communication capabilities including USB, Serial, Fiber & copper Ethernet
  • Draw-out construction eliminates the need for FT test switches
  • Reduced wiring with support for remote RTD’s using the RMIO module
  • Simplified Motor Setup screen reduces setup and configuration time
  • Customized motor overload curve Flex curves
  • Detailed Motor Health Report with critical data
  • Draw out or non draw out options available


  • Small to Medium sized Medium Voltage AC Motors
  • Protection of pumps, conveyors, fans, compressors, etc.
  • Harsh environments requiring protection against corrosive chemicals and humid environments
  • Applications requiring fast and secure communications


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