With the rapid development of society, electricity equipment growing. But the power transmission and distribution facilities, aging and development lag, as well as poor design and lack of power and other reasons caused by the end of the user voltage is too low, and the line users are often high voltage, especially for the electrical equipment requirements of high voltage and high technology Precision equipment, as a time from time to time bombs. The mains system as a public power grid, connected to thousands of various kinds of load above, some of which are large, capacitive, switching power supply load not only from the power grid, but also in turn the power grid itself Influence, deteriorate the power supply quality of the power grid or local power grid, resulting in mains voltage waveform distortion or frequency drift. In addition to unexpected natural and man-made accidents, such as the load voltage is too large, earthquakes, lightning, power transmission system circuit or short circuit, will endanger the normal supply of electricity, thus affecting the normal load.
Unstable voltage will cause the equipment to cause fatal injury or malfunction, affecting the production, resulting in delays in delivery, quality instability and many other losses. While accelerating the aging of the equipment, affecting the service life and even burned parts, so that the owners face the need to repair the troubles or short-term will update the equipment, waste of resources; serious accidents and even accidents, resulting in immeasurable losses.
So the use of regulators, the electrical equipment, especially the voltage requirements of the strict high-tech and precision equipment is essential.
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