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The internal wiring of the soft starter is mainly used to connect different components inside the soft starter to ensure the transmission of electrical signals and the normal operation of the control system. The soft starter controls the input of current and gradually increases the voltage, thereby reducing the impact of the starting current and protecting the equipment and the power grid. Specifically, the internal wiring may have the following functions:

Current control and sensor connection: The soft starter needs to connect the current sensor and the control circuit through internal wiring to monitor the current size and adjust the voltage change during the starting process.

Voltage regulation: The soft starter gradually accelerates the motor from low speed to rated speed by adjusting the voltage increase. The internal wiring helps the signal transmission between the voltage regulation module and the motor.

Protection function realization: Soft starters often include functions such as overload protection and undervoltage protection. The internal wiring helps the sensor and controller work together to realize these protection functions.

Communication and control: Some high-end soft starters may have communication functions, which can be connected to other devices (such as PLC or human-machine interface) through internal wiring for remote monitoring and control.

The correct connection of the internal wiring is the key to ensure the normal operation of the soft starter and realize its protection and control functions.