DIN EN 60255-26:2014-03

This standard contains the essential requirements for immunity and emissions of measuring relays and power system protection equipment including the control, monitoring, communication and process interface equipment taking into account combinations of devices to form schemes for power system protection including the control, monitoring, communication and process interface equipment used with those systems. It specifies limits and test methods in relation to electromagnetic emissions which may cause interference in other equipment. These emission limits have been selected to ensure that the disturbances generated by measuring relays and protection equipment, operated normally in substations and power plants, do not exceed a specified level which could prevent other equipment from operating as intended. This standard specifies the immunity test requirements for measuring relays and protection equipment in relation to continuous and transient, conducted and radiated disturbances, including electrostatic discharges. The requirements have been selected so as to ensure an adequate level of immunity for measuring relays and protection equipment, operated normally in substations and power plants. The responsible committee is DKE/K 434 "Messrelais und Schutzeinrichtungen" ("Measuring relays and protection equipment") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.