Increasing number of non-linear loads, capacity is also growing

With the power electronics technology in various industrial sectors and electrical equipment on the extensive application of the increasing number of non-linear loads, capacity is also growing, a large number of harmonics injected into the grid, so that the power system voltage and current waveforms serious aberrations.  air circuit breaker Instrument is designed for the frequency sine wave, resulting in incorrect data indicate.  power transformers  is the basis for economic calculation grid, energy measurement accuracy is directly related to the power supply and demand sides of the economic and social benefits. Ensure energy metering accuracy, reliability has very important significance.