United power system and isolated power systems. Relay protection and automation. Automatic emergency control of electric power systems. Automatic overfrequency protection devices. Norms and requirements
Electromagnetic compatibility of technical equipment. Radio disturbance from industrial, scientific, medical and domestic (ISMD) radio-frequency equipment. Limits and test methods
Mechanical properties of fasteners made of carbon steel and alloy steel. Part 1. Bolts, screws and studs of specified property classes with coarse thread and fine pitch thread
