DR 07958

12 - 1 Scope
14 - 2 Normative references
16 - 3 Terms and definitions
17 - 3.1 Transformers
20 - 3.2 General terms
21 - 3.3 Operations and protections
23 - 3.4 Circuits and windings
23 - 3.5 Ratings
25 - 3.6 No-load values
25 - 3.7 Insulation
28 - 3.8 Touch current and protective earth conductor current
28 - 4 General requirements
29 - 5 General notes on tests
29 - 5.1 Tests according to this standard are:
31 - 6 Ratings
31 - 7 Classification
31 - 7.1 Transformers are classified:
31 - According to their protection against electric shock:
32 - 8 Marking and other information
32 - 8.1 Transformers shall be marked with the:
37 - 9 Protection against electric shock
37 - 9.1 Protection against contact with hazardous live parts
37 - 9.1.1 Determination of hazardous live parts
38 - 9.1.2 Accessibility to hazardous live parts
39 - 9.1.3 Accessibility to non hazardous live parts
39 - 9.2 Protection against hazardous electrical discharge
40 - 10 Change of input voltage setting
40 - 11 Output voltage and output current under load
41 - 12 No-load output voltage
41 - 13 Short-circuit voltage
41 - 14 Heating
41 - 14.1 General requirements
45 - 14.2 Application of 14.1 or 14.3 according to the insulation system
45 - 14.3 Accelerated ageing test for undeclared class of insulation system
47 - 15 Short circuit and overload protection
47 - 15.1 General
49 - 15.2 Inherently short-circuit proof transformers
49 - 15.3 Non-inherently short-circuit proof transformers
51 - 16 Mechanical strength
51 - 16.1 General
51 - 16.2 Stationary transformers
52 - 16.3 Portable transformers (except portable transformers with integral pins for introduction in socket-outlet in the fixed wiring)
52 - 16.4 Portable transformers provided with integral pins for introduction in socket-outlets of the fixed wiring
53 - 17 Protection against harmful ingress of dust, solid objects and moisture
53 - 17.1 Degrees of protection provided by enclosures (IP code)
56 - 17.2 Humidity treatment
57 - 18 Insulation resistance, dielectric strength and leakage current
57 - 18.1 General
57 - 18.2 Insulation resistance
57 - 18.3 Dielectric strength test
59 - 18.4 Insulation between and within windings
59 - 18.5 Touch current and protective earth conductor current
59 - 18.5.1 Touch current
60 - 18.5.2 Protective earth conductor current
60 - 19 Construction
67 - 20 Components
72 - 21 Internal wiring
73 - 22 Supply connection and other external flexible cables or cords
79 - 23 Terminals for external conductors
81 - 24 Provisions for protective earthing
82 - 25 Screws and connections
85 - 26 Creepage distances, clearances and distances through insulation
93 - Resistance to heat, fire and tracking
93 - 27.1 Resistance to heat
93 - 27.1.1 External accessible parts
93 - 27.1.2 Internal parts
94 - 27.2 Resistance to abnormal heat under fault conditions
95 - 27.3 Resistance to fire
95 - 27.3.1 External accessible parts
96 - 27.3.2 Internal parts
96 - 27.4 Resistance to tracking
96 - 28 Resistance to rusting

Edition 2.0 deals with safety aspects of power transformers, power supplies, reactors and similar products such as electrical, thermal and mechanical safety. This standard covers the following types of dry-type transformers, power supplies, including switch mode power supplies, and reactors, the windings of which may be encapsulated or non-encapsulated.

Revision of AS/NZS 61558.1:2000