SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND COMBINATIONS THEREOF - PART 2-8: PARTICULAR REQUIREMENTS AND TESTS FOR TRANSFORMERS AND POWER SUPPLY UNITS FOR BELLS AND CHIMES
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
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
Annexes
Annex F - Requirements for manually operated switches
which are parts of transformer assemblies
Bibliography
Describes the safety of bell and chime transformers and power supply units incorporating bell and chime transformers.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 96 |
