亲近乱子伦免费视频中文字幕

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      The merits of the varistor and the attention must be paid to the selection of the varistor.
      Publish:Shenzhen Tergy Technology Co., Ltd.  Time:2017-12-29
      Varistor is often used with the protected device or device in parallel, under normal circumstances, pressure sensitive resistor DC or AC voltage should be less than the nominal voltage, the power fluctuation even in the worst, also should not be higher than the rated maximum working voltage in the selection, the maximum continuous working voltage value corresponding to the nominal voltage value is the choice of value. For the application of overvoltage protection, the varistor voltage value of the voltage should be greater than the actual value of the circuit, general should choose the use type: VmA=av/bc type: a circuit voltage fluctuation coefficient; V circuit for DC voltage (AC for RMS); B varistor voltage error; C for aging coefficient, element the actual value calculated by VmA; this is 1.5 times the DC voltage, AC in the state but also consider the peak, so the calculated results should be expanded 1.414 times.
      壓敏電阻優點及選型時必須注意事項
      In addition, the choice must be paid attention to:
      (1) it is necessary to ensure that the continuous operating voltage will not exceed the maximum allowable value when the voltage fluctuation is maximum, otherwise the service life of the varistor will be shortened.
      (2) when a varistor is used between the power line and the ground, sometimes the voltage between the line and the ground is increased due to the bad grounding, so the voltage sensitive resistor with higher nominal voltage is usually used than the line and the line.
      The surge current absorbed by the varistor should be less than the maximum flow rate of the product.
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      亲近乱子伦免费视频中文字幕
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