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EVS-EN-IEC 61557-7:2022/A1:2023 Elektriohutus madalpingevõrkudes vahelduvpingega kuni 1000 V ja alalispingega kuni 1500 V : kaitsesüsteemide katsetus-, mõõte- ja seireseadmed. Osa 7, Faasijärjestus = Electrical safety in low voltage distribution system...
Translator: Tõnu Lehtla, Author: Eesti Standardimis- ja Akrediteerimiskeskus
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