Draft Details

Designation:E61558-2-13
Source:IEC
Review start date:May 22, 2019
Review end date:Jul 21, 2019
Categories:Electrical
Contact email:mary.morgan(at)csagroup.org
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Draft Scope/Description:

Scope:

This International Standard deals with all aspects of safety such as electrical, thermal and mechanical.

This part 2-13 of IEC 61558 applies to stationary or portable, single-phase or polyphase, aircooled (natural or forced), independent or associated auto-transformers, having a rated supply voltage not exceeding 1000 V a.c., a rated frequency not exceeding 500 Hz.

The core power does not exceed: - 1 kVA for single-phase auto-transformers; - 5 kVA for polyphase auto-
transformers. The rated output does not exceed: - 20 kVA for single-phase auto-transformers; - 100 kVA
for polyphase auto-transformers.

This standard is also applicable to auto-transformers having a core power up to 40 kVA, however such transformers are considered as special transformers and are subjected to an agreement between the purchaser and the supplier. Such special auto-transformers have no limitation for the rated output.

The no-load output voltage and the rated output voltage do not exceed 1 000 V a.c. or 1 415 V ripple-free d.c.

For independent auto-transformers, the no-load output voltage and the rated output voltage are not less
than 50 V a.c. or 120 V ripple free d.c.

This standard is applicable to transformers where no insulation between circuits is required by the installation rules or by the equipment specifications.

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