I.S. EN IEC 61558-1:2019

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 General notes on tests
6 Ratings
7 Classification
8 Marking and other information
9 Protection against electric shock
10 Change of input voltage setting
11 Output voltage and output current under load
12 No-load output voltage
13 Short-circuit voltage
14 Heating
15 Short circuit and overload protection
16 Mechanical strength
17 Protection against harmful ingress of dust, solid objects and moisture
18 Insulation resistance, dielectric strength and leakage current
19 Construction
20 Components
21 Internal wiring
22 Supply connection and other external flexible cables or cords
23 Terminals for external conductors
24 Provisions for protective earthing
25 Screws and connections
26 Creepage distances, clearances and distances through insulation
27 Resistance to heat, fire and tracking
28 Resistance to rusting
Annex A (normative) Measurement of creepage distances and clearances
Annex B (normative) Testing a series of transformers
Annex C (void)
Annex D (void)
Annex E (normative) Glow-wire test
Annex F (normative) Requirements for manually operated switches which are parts of
transformers assembly
Annex G (normative) Tracking test
Annex H (normative) Electronic circuits
Annex I (informative) Dimensions for rectangular cross-section connectors of transformers, basic dimensions and coordination
Annex J (normative) Measuring network for touch-currents
Annex K (normative) Insulated winding wires
Annex L (normative) Routine tests (production tests)
Annex M (informative) Examples to be used as a guide for 19
Annex N (informative) Examples for checking points of dielectric strength test voltages
Annex O (void)
Annex P (informative) Examples for measurement points of creepage distances and clearances
Annex Q (informative) Explanation of IP numbers for degrees of protection foreign objects
Annex R (normative) Explanations of the application of 6
Annex S (void)
Annex T (void)
Annex U (void)
Annex V (informative) Symbols to be used for thermal cut-outs
Annex W (normative) Coated printed circuit boards
Bibliography

This part of IEC 61558 deals with safety aspects of transformers, reactors, power supply units and combinations thereof such as electrical, thermal and mechanical safety.