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Electric and optical fibre cables. Test methods for non-metallic materials. Part 506. Mechanical tests. Impact test at low temperature for insulations and sheaths
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Concentrator photovoltaic devices and systems. Performance testing. Part 1. Standard conditions
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Ring stamped cable terminals, with open tail, attached to conductor core. Construction and sizes
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D.c. supplied electronic ballasts for tubular fluorescent lamps. Performance requirements
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United power system and isolated power systems. Operative-dispatch management. Relay protection and automation. Interaction of actors, consumers of electrical energy in creating (modernization) and the exploitation. General requirements
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