Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: EN 61558-1:1997/A1:1998 (IEC 61558-1:1997/A1:1998)
• Năm ban hành / Publication date: 1970
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Safety of power transformers, power supply units and similar - Part 1: General requirements and testsIEC 61558-1:1997 (Modified)
• Phạm vi áp dụng / Scope of standard: This International Standard deals with all aspects of safety (such as electrical, thermal and mechanical) of: a) Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) isolating and safety isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V a.c. and rated frequency not exceeding 1 MHz, the rated output not exceeding: For isolating transformers: - 25 kVA for single-phase transformers, 40 kVA for polyphase transformers. For safety isolating transformers: - 10 kVA for single-phase transformers, 16 kVA for polyphase transformers.