BS EN 61558-2-17:1998

National foreword
Foreword
1 Scope
2 Normative references
3 Definitions
4 General requirements
5 General notes on tests
6 Ratings
7 Classification
8 Marking and other information
9 Protection against accessibility to hazardous live parts
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 and electric strength
19 Construction
20 Components
21 Internal wiring
22 Supply connection and other external flexible cable or cords
23 Terminals for external conductors
24 Provision for protective earthing
25 Screws and connections
26 Creepage distances, clearances and distance through insulation
27 Resistance to heat, abnormal heat, fire and tracking
28 Resistance to rusting
Annexes
Annex C - Material group II
Annex D - Material group I

Applies to associated power transformers for switch mode power supplies, single-phase or polyphase, air-cooled: - separating transformers; - isolating transformers; - safety isolating transformers, having a rated supply voltage not exceeding 1000 V a.c. and a rated frequency of 500 Hz to 1 MHz, the rated output not exceeding: - 10 kVA for single-phase transformers; - 16 kVA for polyphase transformers.