KS IEC61558-2-6:2021

Specification for safety of transformers, power supply units and similar apparatus - Part 2-6: Particular requirements for safety isolating transformers for general use.

Applies to stationary portable, single-phase of poly-phase, air-cooled safety isolating transformers, associated or otherwise having a rated supply voltage not exceeding 500 Hz, the rated output not exceeding 10 KVA for single-phase transformers