MFR13

• The MFR13 calculates the asymmetry as the maximum deviation of each delta voltage from the average.

• In Principle, it’s the ANSI standard, but

  • ANSI: monitor MAX / Average in [%]

  • MFR13: monitor MAX-Average in [V]

MFR300

The MFR300 calculates the asymmetry from the negative sequence in relation to the nominal voltage

The formula of the negative sequence is:

The monitoring would be for |G| / nominal voltage