One of the 2Y-△ connection two-speed motor contactor control circuits
Source: InternetPublisher:酷到被通缉 Keywords: Control circuit motor contactor control BSP Updated: 2021/02/10
The circuit is shown in Figure 3-96. In the figure, SBz is the low-speed operation button and SBi is the high-speed operation button. SB3 is the stop
button.
In this circuit, when the motor is connected in a 2Y shape, the contactor KMa is first connected to the center point of the stator winding, and then
KMz is powered on to turn on the power. In this way, it can avoid burning out the KM3 main contacts due to excessive current when the power is turned on.
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