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IEC 60742 Ed. 1.0 Isolating transformers and safety isolating transformers. Requirements

Standard Number:  IEC 60742 Ed. 1.0
Title:  Isolating transformers and safety isolating transformers. Requirements
Language:  English and French
Replacing Standard:  IEC 60015

Adopted International Standard:  AS 3108 1990 Identical
CEI EN 60742 Identical
SS EN 60742 Ed. 1 (1995)
Status:  Withdrawn
International Classification for Standards (ICS)ELECTRICAL ENGINEERING>>Transformers. Reactors
Publisher:  International Electrotechnical Commission (IEC)
Price:  
Number of Pages:202  

Description:Applies to stationary or portable, single-phase or polyphase, air-cooled isolating and safety isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V alternating current and 1000 V unsmoothed direct current and rated frequency not exceeding 500 Hz. Has the status of a group safety publication in accordance with IEC Guide 104.  
Catalog:Foreword
Preface
General plan of the standard
Chapter I - GENERAL REQUIREMENTS
1. Scope and object
2. Definitions
3. General requirement
4. General notes on tests
5. Rating
6. Classification
7. Marking
8. Protection against electric shock
9. Change of input voltage setting
10. Output voltage and output current under
load
11. No-load output voltage
12. Short-circuit voltage
13. Heating
14. Short-circuit and overload protection
15. Mechanical strength
16. Protection against harmful ingress of
water and moisture
17. Insulation resistance and electric
strength
18. Construction
19. Components
20. Internal wiring
21. Supply connection and external flexible
cables and cords
22. Terminals for external conductors
23. Provision for protective earthing
24. Screws and connections
25. Creepage distances and clearances
26. Resistance to heat,abnormal heat, fire
and tracking
27. Resistance to rusting
APPENDIX IA - Production tests
APPENDIX IB - Examples intended to be used
as a guide for Sub-clause 8.6
APPENDIX IC - Examples of points of
application of test voltages
APPENDIX ID - Measurement of creepage
distances and clearances
APPENDIX IE - Examples of points of
measurement of creepage distances and
clearances
Chapter II - SUPPLEMENTARY REQUIREMENTS
FOR ISOLATING TRANSFORMERS
2. Definitions
5. Rating
7. Marking
8. Protection against electric shock
11. No-load output voltage
13. Heating
14. Short-circuit and overload protection
15. Mechanical strength
18. Construction
19. Components
21. Supply connection and external
flexible cables and cords
22. Terminals for external conductors
23. Provision for earthing
APPENDIX II-I-A - Requirements for
special socket-outlets for shaver
supply units
Chapter III - SUPPLEMENTARY REQUIREMENTS
FOR SAFETY ISOLATING TRANSFORMERS
Section 1 - Safety isolating transformers
for general use
5. Rating
7. Marking
11. No-load output voltage
21. Supply connection and external
flexible cables and cords
Section 2 - Transformers for toys
2. Definitions
5. Rating
7. Marking
8. Protection against electric shock
9. Change of input voltage setting
10. Output voltage and output current
under load
11. No-load output voltage
12. Short-circuit voltage
14. Short-circuit and overload protection
15. Mechanical strength
18. Construction
19. Components
21. Supply connection and external
flexible cables and cords
Section 3 - Bell transformers
2. Definitions
4. General notes on tests
5. Rating
6. Classification
7. Marking
8. Protection against electric shock
10. Output voltage and output current
under load
11. No-load output voltage
13. Heating
14. Short-circuit and overload protection
15. Mechanical strength
18. Construction
19. Components
21. Supply connection and external
flexible cables and cords
22. Terminals for external conductors
24. Screws and connections
Section 4 - Transformers for class III
luminaires incorporating incandescent,
lamps
2. Definitions
5. Rating
7. Marking
10. Output voltage and output current
under load
11. No-load output voltage
21. Supply connection and external
flexible cables and cords
Figures  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  874KB
Tile in English:  Isolating transformers and safety isolating transformers. Requirements

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