Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V. Part 2-6. Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers
Low voltage distribution systems up to 1000 V a. c. and 1500 V d. c. Electrical safety. Equipment for testing, measuring or monitoring of protective measures. Part 3. Loop impedance
