This paper is aimed at proposing a multifunction numerical relay (MNR) for protection against over-current, over- and under-voltage and over- and under-frequency. The MNR serves also as a directionalrelay. The performance of the MNR is investigated through simulation using MATLAB/Simulink and imple-mentation of a prototype using TMS320F28335 Experimenter Kit. The MNR trips a circuit breaker atabnormal conditions of current, voltage ... إقراء المزيد