METHOD FOR PROTECTING A POWER LINE FROM A REMOTE SHORT CIRCUIT AND INFORMING A NETWORK MANAGER ABOUT DISCONNECTING A PROTECTIVE SWITCHING DEVICE FROM A SHORT CIRCUIT OR FOR ANOTHER REASON Russian patent published in 2021 - IPC G01R31/52 G01R31/08 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering. According to the method, the current in the power transmission line is monitored and the maximum distance from the protective switching device installed at the beginning of the line to the most distant point at which its sensitivity to short circuits is ensured is determined. At this or somewhat less distance, a protective switching device with sensitivity to short circuits is installed along the entire subsequent length of the power line. In the event of a short circuit, a protective shutdown is performed. Based on the totality of the facts of the flow or absence of short-circuit current through the protective switching device and the disappearance of voltage beyond the point of its installation, as well as the fact of disconnection, it is concluded that the protective switching device has been disconnected due to short-circuit current or manually and send a message to the network manager.

EFFECT: ensuring the possibility of protecting the power transmission line from a remote short circuit in the section of the power transmission line behind the installation point of the protective switching device.

1 cl, 1 dwg