What determines the electrodynamic braking efficiency?
Show the correct answer
Correct answer
A. Efficiency of the traction motors.
Explanation
This question is about the efficiency of electrodynamic brakes. It depends on the efficiency (working order) of the traction motors - the answer is A.
The electrodynamic brake uses the tram's traction motors: during braking they work as generators and create resistance that slows the vehicle down, and the energy is returned to the overhead line or turned into heat in resistors. If a motor or its control system is damaged, the electrodynamic brake will not work properly. The tram's battery (answer B) is not the source of the braking force, and electrodynamic brakes are not independent of the tram's systems (answer C). That is why a tram also has mechanical brakes and track brakes, which work independently of the motors.
Legal basis: Art. 66 para. 1 point 1 of the Road Traffic Act (Prawo o ruchu drogowym)