Method for monitoring a source changeover switch and source changeover switch implementing such a method

A method for monitoring an electric power source changeover switch, said changeover switch comprising:

• Inputs to receive availability states of a plurality of power sources,
• inputs to receive possible operating modes of the source changeover switch, and outputs to control an open or closed state of switches in the form of electrical circuit breakers respectively configured to connect the electric power sources to one or more loads,
• the method comprising:
• a step of identifying all combinations of possible operating modes and possible availability states of the power sources,
• an association step comprising associating a configuration of an open or closed state of each said switch with each combination identified in the identification step,
• a step of setting a control operation to determine whether a deviation between (i) an expected configuration as a function of a current selected operating mode and current availability of the power sources and (ii) a current configuration is linked to a change in configuration from an origin external to the source changeover switch, and
• a step of setting a second control operation to rectify the deviation between the expected configuration and the current configuration according to a first methodology when the deviation is from the origin external to the source changeover switch and according to a second methodology when the deviation is not from the origin external to the source changeover switch.