South Wales Switchgear, makers of electrical switchgear, of Treforest and Blackwood, Monmouthshire.
South Wales Switchgear led the way in exploiting SF6 gas as a medium of interruption and insulation. Traditionally, South Wales Switchgear were involved in the design and manufacture of 11kV – 33kV switchgear and DC type switchgear for naval projects.
1941 Private company.
1961 Manufacturers of electrical switchgear and power transformers. 2,000 employees.