Specifies general safety requirements for approval and test purposes for isolating transformers for the supply of medical locations. This Standard is an adoption with national modifications and contains the full text of IEC 61558-2-15:1999.

Replacement:This international standard deals with all aspects of safety such as electrical, thermal and mechanical.This part 2-15 of IEC 61558 applies to stationary, single-phase or polyphase, air-cooled (natural or forced) isolating transformers for the supply of group II medical locations, designed to be permanently connected to the fixed wiring of IT supply system, having a rated supply voltage not exceeding 1 000 V a.c. and rated frequency not exceeding 500 Hz. The rated output shall not be less than 3 kVA and shall not exceed 10 kVA.This part 2-15 of AS/NZS 61558 applies to stationary, single-phase or polyphase, air-cooled (natural or forced) isolating transformers used to provide an IT supply system for the supply of cardiac-protected electrical areas.NOTE 1 Details of IT supply systems are to be found in IEC 60364-3.NOTE 2 The wiring rules for group II medical locations are under consideration [1]* .NOTE 2 The wiring rules for cardiac-protected electrical areas are to be found in AS/NZS 3003 [1]*The no-load output voltage and the rated output voltage shall not exceed 250 V a.c. single-phase or polyphase (phase-to-phase voltage).Isolating transformers are used where double or reinforced insulation between circuits is required by the installation rules or by the appliance specification.This standard is applicable to dry-type transformers. The winding may be encapsulated or non-encapsulated.NOTE 3 For transformers filled with liquid dielectric or pulverised material such as sand, requirements are under consideration.NOTE 4 Attention is drawn to the fact that: for transformers intended to be used in tropical countries, special requirements may be necessary; for the purposes of this standard, Australia and New Zealand are not considered to be tropical; in locations where special environmental conditions prevail, particular requirements may be necessary.This standard also applies to transformers incorporating electronic circuits. This standard does not apply to external circuits and their components intended to be connected to the input and output terminals or socket-outlets of the transformer.

First published as AS/NZS 61558.2.15:2001.