FIELD: electricity.
SUBSTANCE: since tripping of a short-circuit current surge in a line of the main power supply unit the countdown is started, which is equal to the operation delay time of an automatic transfer switch (ATS). Availability of the operating current is monitored in this line, and when it is equal to zero, and at the moment of the countdown completion the operating current surge occurs in the line of the main power supply unit with the value defined by a load of this line section adjacent to the ATS point, then conclusion is made about a damage of the master section in this line, and if the operating current is not equal to zero and defined by the load connected to the master section in the line of the main power supply unit and at the moment of the countdown completion the short-circuit current surge occurs in the line of the main power supply unit, then conclusion is made about a damaged section in the line of the main power supply unit adjacent to the ATS point.
EFFECT: simplifying implementation of the method and enlarging its functional capabilities.
3 dwg
