One of the one-way operation circuits of DC motor armature connected with resistor to start energy consumption braking

 The circuit is shown in Figure 3-196. This circuit has a first-level starting resistor, and the undervoltage relay KAz controls the starting resistor
to be cut off; when shutting down, energy consumption braking is used. When the undervoltage relay KAL and KA2 coils work, they are connected in parallel with the motor armature.
They reflect the change of the motor armature voltage, that is, the speed. So it can be said that this circuit is controlled by speed changes.