Introduction
1 Scope
2 Normative references
3 Service conditions
3.1 Environmental conditions
3.2 Degree of protection
3.3 Corrosion
3.4 Insulating liquid characteristics
4 Dielectric strength of contacts (according to EN 60255-5)
5 Seismic withstand
6 Tests
6.1 Routine test
6.2 Type test