Circuit configuration and switchyard layouts ABB This manual is valid for outdoor and indoor versions of air-insulated high-voltage substations, for SF gas-insulated substations and hybrid substations with voltage levels ≥ 72.5 kV. The defined selection and assessment criteria are generally also valid for the range 1 kV to < 72.5 kV. However, for medium-voltage distribution and 6 industrial substations, different arrangements may be derived them. The voltage levels 72.5 kV, 123 kV, 245 kV, 420 kV and 525 (550) kV have been mainly dealt with

1HVE000023.PDF

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