In order to ensure the safety operation of relay protection and automatic safety device in smart substation

safety isolation measures are mainly adopted

such as putting into maintenance pressing plate

exiting device soft pressing plate

outlet hard pressing plate and disconnecting optical fiber between devices. Taking line outage maintenance for example

starting from the information connection between equipment such as voltage and current sampling

tripping (including remote tripping)

starting failure etc.

it focuses on the analysis of the dangerous points affecting the operation equipment and the possible results. The applicable secondary safety measures are summarized according to various dangerous points

and the reliable isolation between the maintenance devices and the operation devices are completed

which provides valuable references for the operation and maintenance personnel.