Under & Over Frequency Relay: MRF2

FEATURES
  • Microprocessor technology with watchdog
  • Effective active low-pass filter for suppressing harmonics
  • Four elements for frequency supervision, alternatively for under/over frequency detection
  • Independent, separate adjustable timers
  • Adjustable voltage threshold for blocking of the frequency measurement
  • Display of setting parameters
  • Display of actual measuring values, storage and display of tripping values
  • Minimum- and maximum value recording of measurements
  • The protective functions can be assigned individually to the output relays (relay matrix)
  • In compliance with VDE 0435, part 303, IEC 255

The MRF2 is a universal frequency relay and contains the protective functions required by most electrical utilities for mains parallel operation of power stations:

  • Four elements for over/under frequency protection
  • Fast decoupling of the generator from the grid at mains failure
  • Suitable for load shedding systems

MRF2 frequency relay is an advanced digital protection device primarily in use of df/dt (rate of change of frequency) technology for rapid and precise response to frequency deviations in power systems. This ensures enhanced stability, reliability, and protection for various applications, from power generation to industrial facilities.

  • Fast Response with df/dt Technology enables detection of rapid changes in frequency with high precision.
  • Enhanced system Stability & Reliability
  • safeguards valuable electrical equipment, such as motors, pumps, from damage caused by frequency fluctuations, including overheating and mechanical stress, thus minimising costly repairs and downtime
  • It provides detailed data, diagnostics, storage of tripping values, and fault analysis capabilities.
  • The MRF2 is designed with robust construction and advanced signal processing algorithms.