With the rapid social progress, increasing electrical equipment. But the power transmission and distribution facilities, aging and development lags behind, as well as poor design and other causes of insufficient power supply voltage is too low end users, while users are often high voltage thread on voltage electrical equipment especially for demanding high-tech and mcb circuit breaker, such as a time bomb alone. Electricity system as a public grid, the above kinds of loads connected to the tens of thousands, some of the larger inductive, capacitive, switching power supply, the load is not only to get electricity from the grid, but also turn on the power grid itself causes impact of electric meter grid or local grid power quality, resulting in the mains voltage waveform distortion or frequency drift. Another unexpected natural and man-made disasters, such as earthquakes, lightning, power transmission system is open or shorted, will endanger the normal supply of electricity, thus affecting the normal work load.
Unstable voltage will cause fatal injury or Voltage stabilizer, affecting production, resulting in delivery delays, inconsistent quality, and many other losses. While accelerating the aging of equipment, affecting life and even burned parts, so that the owners faced with distress or in need of repair will shortly update the device, a waste of resources; seriously, security incidents, causing incalculable damage.
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