EN 50180:2010 – Bushings above 1 kV up to 52 kV and from 250 A to 3,15 kA for liquid filled transformers

1 Scope
This European Standard is applicable to ceramic and resin insulated bushings having highest voltages above 1 kV up to 52 kV, rated currents from 250 A up to 3 150 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers.
This standard establishes essential dimensions, to ensure interchangeability of bushings and to ensure adequate mounting and interchangeability of mating plug-in separable connectors of equivalent ratings.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 62155, Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1 000 V (IEC 62155)
EN 60672-3, Ceramic and glass-insulating materials – Part 3: Specifications for individual materials (IEC 60672-3)
EN 60137, Bushings for alternating voltages above 1 000 V (IEC 60137)
IEC 60815, Selection and dimensioning of high-voltage insulators intended for use in polluted conditions
IEC Guide 109 and Cenelec TC 111X document 1) , Environmental aspects – Inclusion in electrotechnical product standards
NOTE It is highly recommended to minimize the impact of bushings on the environment during all phases of their life (including manufacturing, operation during service life, dismantling after their end of life and disposal or recycling).
IEC Guide 109 and document by CENELEC TC 111X “Environmental standardization for electrical and electronic products and systems” after finalization can be used as helpful reference.
3 Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
open type bushing
a bushing, one end of which is immersed in an insulating liquid with the other end in ambient air and exposed or not exposed to external atmospheric conditions
3.2
plug-in type bushing
a bushing, one end of which is immersed in an insulating medium and the other end designed to receive a separable insulated cable connector without which the bushing cannot function
EN 50180:2010 – Bushings above 1 kV up to 52 kV and from 250 A to 3,15 kA for liquid filled transformers