Explosive atmospheres. Personnel competence of the facilities performing repair and overhaul of the electrical installations intended for use in explosive atmospheres. Requirements
United power system and isolated power systems. Relay protection and automation. Requirements for the operation of relay protection devices for power transmission lines at voltage level 110 kV and higher in transient modes that come amid saturation of current transformers
Thermal insulating products for engineering equipment of buildings and industrial installations. Methods for determination of trace quantities of water soluble chloride, fluoride, silicate, sodium ions and pH
