IEC 61558-2-6:1997 Safety of power transformers, power supply units and similar - Part 2: Particular requirements for safety isolating transformers for general use
Replacement:
This part 2 of IEC 61558 applies to stationary or portable, single-phase or polyphase, air-cooled safety isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V a.c. and rated frequency not exceeding 500 Hz, the rated output not exceeding:
- 10 kVA for single-phase transformers;
- 16 kVA for polyphase transformers.
This standard is also applicable to safety isolating transformers without limitation of the rated output; however such transformers are considered as special transformers and are subjected to an agreement between the purchaser and the supplier.
The no-load output voltage and the rated output voltage does not exceed:
50 V a.c. r.m.s, and/or
120 V ripple-free d.c.
between conductors or between any conductor and earth.
This standard is applicable to dry type transformers. The windings may be encapsulated or non-encapsulated.
IEC 61558-2-6:1997 history
0000 IEC 61558-2-6:2021 RLV
2009IEC 61558-2-6:2009 Safety of transformers, reactors, power supply units and similar products for voltages up to 1100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers
1997IEC 61558-2-6:1997 Safety of power transformers, power supply units and similar - Part 2: Particular requirements for safety isolating transformers for general use