IEC 61378-2:2001

FOREWORD
Clause
1 General
    1.1 Scope
    1.2 Service conditions
2 Normative references
3 Definitions
4 List of variables
5 Ratings
    5.1 General
    5.2 Rated voltage
    5.3 Rated current
    5.4 Rated frequency
    5.5 Rated power
6 Tolerances
    6.1 General
    6.2 Short-circuit impedance tolerances
    6.3 Guarantees
7 Losses
    7.1 General
    7.2 No-load loss
    7.3 Load loss under rated power-frequency conditions
    7.4 Determination of hot-spot temperature
8 Insulation levels
    8.1 Line windings
    8.2 Valve windings
    8.3 Induced voltage level with partial discharge measurements
9 Sound level
    9.1 General
    9.2 Guaranteed sound-power levels
    9.3 Sound-power level at site
10 Testing
    10.1 General
    10.2 Tests
    10.3 Load-loss measurements
    10.4 Factory dielectric tests
    10.5 Temperature-rise test
    10.6 Load-current test
    10.7 Determination of transformer sound-power level
11 High-frequency modelling
12 Loading of transformer above rating
13 Bushings
    13.1 AC bushings
    13.2 Valve winding bushings
14 Tap-changer
    14.1 General
    14.2 Current wave shape
Bibliography

This part of IEC 61378 applies to oil-immersed three-phase and -single-phase convertor transformers for use in HVDC power transmission. It applies to transformers having two, three or multiple windings. This standard does not apply to convertor transformers for industrial applications (see IEC 61378-1) and to convertor transformers for traction applications (see IEC 60310).