SAFETY OF POWER TRANSFORMERS, POWER SUPPLY UNITS AND SIMILAR DEVICES - PART 2-13: PARTICULAR REQUIREMENTS FOR AUTO-TRANSFORMERS FOR GENERAL USE (IEC 61558-2-13:1999, IDT)
This Malaysian Standard deals with all aspects of safety such as electrical, thermal and mechanical.
This standard 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 1 000 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-
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23/05/2019
20
NSC 05 - Generation, Transmission & Distribution of Energy
