SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND SIMILAR PRODUCTS FOR SUPPLY VOLTAGES UP TO 1100 V - PART 2-4: PARTICULAR REQUIREMENTS AND TESTS FOR ISOLATING TRANSFORMERS AND POWER SUPPLY UNITS INCORPORATING ISOLATING TRANSFORMERS
International Electrotechnical Committee
FOREWORD
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 cable 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
Annexes
Annex C - Creepage distances (cr), clearances (cl) and
distances through insulation (dti) Material
group II (400 <= CTI < 600)
Annex D - Creepage distances (cr), clearances (cl) and
distances through insulation (dti) Material
group I (CTI >= 600)
Annex R - Explanations of the application of 4.2 of
IEC 60664-1:2007
Bibliography
Covers the safety of isolating transformers for general applications and power supply units incorporating isolating transformers for general applications.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 96 |
