A motor is an inductive load, where the current lags behind the voltage. This behavior is common in many electrical appliances. To improve the power factor, it's necessary to compensate with a capacitive load, typically using a capacitor or a synchronous motor. Reducing the motor’s excitation current can also help increase the power factor. This is one of the key features of the HPS2 energy-saving function, which lowers the voltage during light loads, thereby reducing the excitation current and improving the cosine phi (COS∮) value. In energy-saving mode, when the motor is under a light load, the soft starter activates the energy-saving function. The PF switch is switched to the Y position, and under the influence of current feedback, the soft starter automatically reduces the motor voltage. This process decreases the excitation component of the motor current, leading to a higher power factor. It's worth noting that this feature is not available in standard domestic soft starters. Additionally, the energy-saving function cannot be activated in the contactor bypass state. The TPF switch offers two different response times for the energy-saving function: normal and slow. In both modes, the system automatically adjusts for energy savings. Under no-load conditions, this can result in up to 40% energy savings, while under loaded conditions, the savings are around 5%. This makes the energy-saving operation mode highly effective for optimizing performance and reducing energy consumption in various applications.
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