Two-speed motor forward and reverse control circuit with energy consumption braking

The circuit is shown in Figure 3-108. SB3 is the forward button; S island is the reverse button; SBi is the low-speed start button; SB2 is
the high-speed start button; SBs is the stop button; KMs is the brake contactor, and the braking time is controlled by the time relay KT;
the intermediate relay KA The function is to ensure that the required speed is selected first, and then forward and reverse operation can be selected.