1. Switchgear Manual;ABB,2001
2. Environmental Product Declaration: Double Break Disconnector type SDB range 123–420kV. ABB Ltd;ABB,2002
3. Environmental Product Declaration: Power transformer TrafoStar 500MVA;ABB,2003
4. Environmental Product Declaration: GIS Type ELK-3 for 420kV;ABB,2005
5. Environmental Product Declaration: Live Tank Circuit Breaker, Type LTB 145D;ABB,2007