Descriptors | Railway electric traction equipment, Switchgear, Direct current, Railway fixed equipment, Electrical installations, Railway equipment, Electrical measurement, Control devices, Electric control equipment, Electrical protection equipment, Current measurement, Voltage measurement, Electrical measuring instruments, Control systems, Timing devices, Circuit-breakers, Circuits, Protective relays, Electrical faults, Fault currents, Rectifiers, Tripping mechanisms (circuit-breakers), Overcurrent protection, Overload protection, Electrical impedance, Earthing, Electric cables Railway applications |