IEC 60255-1:2022 specifies common rules and requirements applicable to measuring relays and protection equipment, including any combination of equipment to form a distributed protection scheme for power system protection such as control, monitoring and process interface equipment . IEC 60255-1:2022 specifies common rules and requirements applicable to measuring relays and protection equipment, including any combination of equipment to form a distributed protection scheme for power system protection such as control, monitoring and process interface equipment . The standard DL/T 2545. 1-2022, titled "Code for Inspection of Relay Protection and Automatic Safety Devices in Power Plants - Part 1: Coal-Fired Power Plant," was published on November 4, 2022, by the China Electricity Council (CEC). The technical content of IEC publications is kept under constant review by the IEC. Please make sure. Isolator switch introduces how to conduct inspection and management of relay protection and automatic devices for new installations, reconstructions, and capacity expansions? (1) For new installations, reconstructions, and capacity expansions, after the power supply plan is determined, the customer.