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Multilin F650

The Multilin F650 has been designed for the protection, control and automation of feeders or related applications. The Multilin F650 feeder protection relay provides high speed protection and control for feeder management and bay control applications, and comes with a large LCD and single line diagrams that can be built for bay monitoring and control for various feeder arrangements including ring-bus, double breaker or for breaker and half.

Key Benefits

  • Comprehensive and flexible protection and control device for feeder applications

  • Increased system uptime and improved stability with load shedding and transfer schemes

  • Advanced automation capabilities for customized protection and control solutions

  • Human machine interface (HMI) with graphical LCD, programmable buttons, and easy keys for selecting setting menus, and submenus

  • Reduced replacement time with modular draw-out construction

  • Reduced troubleshooting time and maintenance costs with IEEE 1588 (PTP), IRIG-B and SNTP time synchronization (configuration of two different SNTP masters), event reports, waveform capture, and data logger

  • Simplified system integration with communications supporting serial and Ethernet interfaces as well as multiple protocols

  • Embedded IEC® 61850 protocol (and support for edition 2), IEC 60870-5-103/104, IEC 62439/PRP/HSR, IEEE 802.1D/RSTP

  • Proven interoperability and KEMA 61850 Edition 2 certified


  • Primary or back-up protection and control for feeders on solidly grounded, high impedance grounded or resonant grounded systems

  • Bus blocking/Interlocking schemes

  • High-speed fault detection for arc flash

  • Throw over schemes (bus transfer scheme applications)

  • Load shedding schemes based on voltage and frequency elements

  • Distributed Generation (DG) interconnect protection, including active and passive anti-islanding

Key Features

  • Time, instantaneous & directional phase, neutral, ground and sensitive ground overcurrent

  • Manual close with cold load pickup control, Forward Power and Directional Power Units

  • Load encroachment supervision

  • Wattmetric ground fault detection

  • Positive and negative sequence based over/under voltage elements

  • 2nd Harmonic restraint

  • CT Supervision

  • Four-shot autorecloser with synchronism check

  • Trip circuit supervision, breaker control and
    breaker failure

  • Frequency protection (rate of change and six
    stages of under and over frequency)

  • Broken conductor and locked rotor

  • Programmable digital inputs and outputs

  • 6 Setting Groups

Protection & Control

The F650 feeder protection relay provides high speed protection and control for feeder management and bay control applications, including:

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F650 - Functional Block Diagram

F650 Brochure

F650 Manual

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