NEN EN 50180 : 2010

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
    3.1 Open type bushing
    3.2 Plug-in type bushing
    3.3 Separable connector
    3.4 Interface type
    3.5 Bail holder
4 Requirements
    4.1 Application
    4.2 Standard values of rated voltage (Ur)
    4.3 Standard values of rated current (Ir)
    4.4 Compliance
    4.5 Common dimensions
    4.6 Detail dimensions and creepage distances of open type bushings
          4.6.1 250 A, upright types
          4.6.2 250 A, inclined types
          4.6.3 630 A, upright types
          4.6.4 630 A, inclined types
          4.6.5 1,250 A types
          4.6.6 2,000-3,150 A types
    4.7 Detail dimensions of plug-in type bushings
          4.7.1 Outside cone types
          4.7.2 Inside cone types
Annex A (normative) Detail drawings of porcelain
A.1 250 A upright insulators
A.2 250 A inclined insulators
A.3 630 A upright insulators
A.4 630 A inclined insulators
A.5 1,250 A insulators
A.6 2,000-3,150 A insulators

Defines essential dimensions, to ensure interchangeability of bushings and to ensure adequate mounting and interchangeability of mating plug-in separable connectors of equivalent ratings. Pertains to ceramic and resin insulated bushings having highest voltages above 1 kV up to 52 kV, rated currents from 250 A up to 3150 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers.