Upgrading and Refurbishing

Before: Water-cooled AC Control Welding pack	After: Water-cooled AC Control Welding pack
Before: Class 7E2 Locomotive Rectifiers	After: Class 7E2 Locomotive Rectifiers
Before: 4,5MW Traction Substation Rectifier following a lightning strike	After: 4,5MW Traction Substation Rectifier