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BS EN 61558-2-14:2013

BS EN 61558-2-14:2013

$142.49

Safety of transformers, reactors, power supply units and combination thereof – Particular requirements and tests for variable transformers and power supply units incorporating variable transformers

Published By Publication Date Number of Pages
BSI 2013 26
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IEC 61558-2-14:2012 deals with safety of variable transformers for general applications and power supply units incorporating variable transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. This first edition cancels and replaces the chapter IV of the IEC 60989 published in 1991. It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) update of the existing text; b) complete editorial review. This part has the status of a group safety publication in accordance with IEC Guide 104:2010. The preparation of safety publications and the use of basic safety publications and group safety publications. The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication. This publication is to be read in conjunction with /2.

PDF Catalog

PDF Pages PDF Title
6 English
CONTENTS
7 1 Scope
9 2 Normative references
3 Terms and definitions
10 4 General requirements
5 General notes on tests
11 6 Ratings
7 Classification
8 Marking and other information
13 9 Protection against electric shock
10 Change of input voltage setting
11 Output voltage and output current under load
12 No-load output voltage
15 13 Short-circuit voltage
Table 101 – Output voltages difference for auto transformers, separating and safety isolating transformers
Table 102 – Output voltages difference for isolating transformers
16 14 Heating
15 Short circuit and overload protection
16 Mechanical strength
Table 103 – Maximum permitted temperatures of the winding
17 17 Protection against harmful ingress of dust, solid objects and moisture
18 Insulation resistance, dielectric strength and leakage current
19 Construction
21 20 Components
21 Internal wirings
22 Supply connection and other external flexible cables or cords
23 Terminals for external conductors
24 Provision for protective earthing
22 25 Screws and connections
26 Creepage distances, clearances and distances through insulation
27 Resistance to heat, fire and tracking
28 Resistance to rusting
23 Annexes
24 Bibliography

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BS EN 61558-2-14:2013
$142.49