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BS EN 62040-1 AMD1. Uninterruptible power systems (UPS). Part 1. Safety requirements|Protected electrical equipment, Occupational safety, Electric power systems, Operators (personnel), Electrical equipment, Power control (electric), Electronic power supplies, Safety measures, Voltage, Alternating current, Direct current, Low-voltage equipment, Electrical safety, Uninterruptible power systems, Electric cells, Rectifiers, Electric convertors, Electrical testing, Equipment safety

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