Online Standards Store PDF
United power system and isolated power systems. Relay protection and automation. Distance protection of power transmission lines at voltage class 110 kV and higher powered from two or more sides. The method of calculation and selection of settings
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Services in railway transport. Transportation of perishable goods. General quality requirements
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Low-voltage switchgear and controlgear. Part 5-7. Control circuit devices and switching elements. Requirements for proximity devices with analogue output
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Wooden sleepers for narrow-gauge railways. Specifications
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