MRF3 Frequency Relay

Product detail

Product code:
Request a quote Select options below to request a price.

Product Information

Download Area

Available options

Documentation (Brochures & Manuals)

General HighTECH Line User Manual

The MRF3 is a universal frequency relay:

  • Four elements for over- or under frequency protection

  • Two elements for frequency gradient supervision df/dt

  • Fast decoupling of the generator from the grid at mains failure

  • Suitable for load shedding systems

Benefits and Key Features

  • 19“ racks – fully withdrawable

  • Door mounting – withdrawable and sealable

  • Panel mounting – fully withdrawable

  • Fault / disturbance recorder

  • Intuitive HMI

  • Display (of primary values)

  • Easy setting software – Smart view

  • Compact form factor


  • Interconnection of renewable energies (DER – distributed energy resources) to the public grid.

  • Frequency based protection option, examples:

    Over-/Underfrequency supervision

    Load shedding by ROCOF

Inputs and Outputs
Binary inputs 2
Output relays 4
Voltage transformer inputs 1
Watchdog relay 1
Protection ANSI
Frequency protection 810/81U
Frequency gradient 81
Additional Features
Disturbance recorder
Fault recorder (none volatile)
Parameter sets 2
Mounting Type
Housing is withdrawable
Housing suitable for 19” rack mounting (Option)
Housing suitable for door mounting (Option)
Housing suitable for mounting plate

© 2022 SEG ELECTRONICS GMBH | All rights reserved
webstránky | webdesign | eshopy |
Website uses cookies
We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it. Learn More