I.S. EN 61050:1993

FOREWORD
SECTION 1 - GENERAL REQUIREMENTS
1 General
   1.1 Scope
   1.2 Normative references
2 Definitions
3 General requirements
4 General notes on tests
5 Rating
6 Classification
7 Marking
SECTION 2 - SAFETY REQUIREMENTS
8 Electrical characteristics
9 Magnitude influence
10 Heating
11 Endurance
12 Degrees of protection
13 Voltage across series capacitors
14 Moisture resistance
15 Insulation resistance and electric strength
16 Construction
17 Connection of the conductors
18 Provision for earthing
19 Screws, current-carrying parts and connections
20 Creepage distances and clearances
21 Insulating materials
22 Resistance to corrosion
Annex A (normative) Information on wiring rules
Annex B (normative) Transformers with connecting leads
Annex C (normative) Guidance for conformity of production
         tests
Annex ZA (normative) Other international publications
         quoted in this standard with the references of the
         relevant European publications

Applies to independent and built-in single-phase transformers with separate input and output windings, for use on a.c. supply up to 1000 V at 50 Hz or 60 Hz, to supply and stabilize cold cathode tubular lamps (or assemblies of such lamps) having a no-load rated output voltage exceeding 1000 V but not exceeding 10000 V and intended for lighting and for electric advertising signs, light signals and similar purposes.