DC switchgear in fixed installations (substations, traction power supply).
The series covers DC switchgear in fixed electric traction installations (substations, sectioning cabins and traction power-supply systems). Part 1 gives general requirements; subsequent parts cover DC circuit-breakers, indoor and outdoor disconnectors, surge arresters, switchgear assemblies, and measuring, control and protective devices for DC traction systems.
Onboard vehicle apparatus is covered by the IEC/EN 60077 series.
For measuring devices in DC substations, a reference to EN 50123 tells the designer that the manufacturer applied rated and test conditions appropriate to DC traction systems (voltages, overvoltages and short-circuit currents), as defined in Part 1.
The EN 50123 series applies to DC switchgear in fixed traction installations (substations, sectioning cabins). Onboard apparatus is covered by the IEC/EN 60077 series.
