AS/NZS 61558.2.15:2001

1 - AS/NZS 61558.2.15:2001 SAFETY OF POWER TRANSFORMERS, POWER SUPPLY UNITS AND SIMILAR - PARTICULAR REQUIREMENTS FOR ISOLATING T
4 - CONTENTS
7 - PREFACE
9 - 1 Scope
9 - 2 Normative references
10 - 3 Definitions
10 - 4 General requirements
10 - 5 General notes on tests
10 - 6 Ratings
11 - 7 Classification
11 - 8 Marking and other information
11 - 9 Protection against accessibility to hazardous live parts
11 - 10 Change of input voltage setting
11 - 11 Output voltage and output current under load
11 - 12 No-load output voltage
12 - 13 Short-circuit voltage
13 - 14 Heating
13 - 15 Short-circuit and overload protection
13 - 16 Mechanical strength
13 - 17 Protection against harmful ingress of dust, solid objects and moisture
13 - 18 Insulation resistance and dielectric strength
14 - 19 Construction
16 - 20 Components
16 - 21 Internal wiring
17 - 22 Supply connection and other external flexible cords
17 - 23 Terminals for external conductors
17 - 24 Provision for protective earthing
17 - 25 Screws and connections
17 - 26 Creepage distances, clearances and distances through insulation
17 - 27 Resistance to heat, abnormal heat, fire and tracking
17 - 28 Resistance to rusting
20 - Annexes
20 - Annex C - Material group II
20 - Annex D - Material group I
20 - Annex L
21 - Bibliography
22 - Annex ZZ - Variations to IEC 61558-2-15:1999 for application in Australia and New Zealand

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.