KSIEC61558-2-13:2009

Safety of power transformers, power supplies, reactors and similar products Part 2-13: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers

Applies to stationary or portable, single-phase or polyphase, air-cooled (natural or forced), independent or associated auto-transformers, having a rated supply voltage not exceeding 1 000 V a.c., a rated frequency not exceeding 500 Hz