Considering all the danger of short circuits, significant increases in voltage and asynchronous running, which will lead to severe consequences for the power system and equipment in case of impossibility of eliminating the modes, taking into account the inclusion of power lines and power equipment under voltage and for loading without appropriate automation devices, relay protection is not allowed. Information about where to buy automation devices and how to install radio masts on this site is presented in the best way.
The decommissioning of relay protection and automation devices from operation on equipment can be carried out without any additional measures only if the relay protection and automation devices remain in operation, and at the same time ensure the elimination of all emergency modes and possible damage with the required speed. Breakdown of high-speed protection of overhead lines on a functioning line to eliminate maintenance or malfunction is permissible only when performing backup protections against phase-to-phase and single-phase short circuits with teleacceleration, or at the same time with the introduction of operational acceleration of protections, if it will be necessary to ensure the level of stability, or conditions for reducing action of short-circuit currents on equipment.
In other cases, if the implementation of such measures is impossible, then as a temporary measure it will be possible to organize a transfer from the overhead line to the "ShSOV" or "OV", if there is a possibility of performing them for high-speed protection. In the absence of the possibility of the overhead line, temporary protection should be disabled here for a while. Removal of backup protections from operation in the presence of the main fast-acting protection against various types of damage, which does not require any special measures, given that the backup and main protection at adjacent connections should remain in operation.
Source: www.arhsk.ru
