Other Railway Resistors used in light rail vehicles such as high-speed trains, trams or railway vehicles such as locomotives and wagons are Charge-Discharge Resistors, Line Test Resistors, Filter Resistors and Damping Resistors.
The Charge-Discharge Resistor is used to charge and discharge the dc capacitors inside the inverters in a controlled manner so that the semiconductors are not damaged.
Line Test Resistors
Line Test Resistors are used to detect if there is any malfunction before energizing the catenary lines. Before the high-speed circuit breakers are switched, the resistor is activated, and the circuit breakers are safely activated if there is no fault current on the line.
Filter and Damping Resistors
Filter Resistors are used to improve the quality of the power grid and Damping Resistors are used to prevent any damage to electronic components by limiting any current and voltage peaks where the Filter Resistors improve the quality of the power grid.