SN EN 50180 : 1997

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

Applies to ceramic and resin insulated bushings for rated voltages in excess of 1 kV up to 36 kV and rated currents from 250 A to 3 150 A for insulating liquid filled transformers. Determines essential dimensions for ensuring interchangeability of bushings and mating plug-in separable connectors of equivalent ratings.