Energy-saving principle of soft starter

- Aug 01, 2019-

The motor is an inductive load, a current lag voltage, and most electrical appliances are such. In order to increase the power factor, it must be compensated by a capacitive load, and capacitive or synchronous motor compensation. Reducing the motor's sharp magnetic current also increases the power factor (HPS2 energy saving function, which lowers the voltage at light load, lowers the sharp magnetic current and increases the COS∮). Energy-saving operating mode: reducing the voltage at light load reduces the sharp magnetic current, and the motor current is divided into active and reactive components (sharp magnetic components) to increase the COS∮.

Energy-saving operating mode: When the motor load is light, the soft starter in the state of selecting the energy-saving function, the PF switch hot dial to the Y-bit, under the action of current feedback, the soft starter automatically reduces the motor voltage. The excitation component of the motor current is reduced. This increases the power factor (COS∮) of the motor. (Domestic soft starter slotless without this function) in the contactor bypass state can not achieve this function. The TPF switch provides two reaction times for energy saving functions; Energy-saving operation mode: automatic energy-saving operation. (normal, slow two reaction speeds) empty load energy saving 40%, load energy saving 5%.