Low voltage surge protective devices-Specification for thyristor surge suppressors (TSS)
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Short-circuit currents in d.c auxiliary installations in power plants and substations. Calculation of short-circuit currents
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Short-circuit currents in d.c. auxiliary installations in power plants and substations-Calculation of effects
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Lightning protection. Telecommunication lines-Fibre optic installations
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Lightning protection. Telecommunication lines-Lines using metallic conductors
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Electroacoustics. Sound level meters-Specifications
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Electroacoustics. Sound level meters-Specifications
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Electroacoustics. Sound level meters. Pattern evaluation tests
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Electroacoustics. Sound level meters-Periodic tests
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