Valve arrester action monitor calibration instrument
A lightning arrester and monitor technology, which is applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve the problems of inability to successfully calibrate and unsatisfactory results, and achieve the effects of uniform voltage division between capacitors, high test voltage, and reduced volume
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[0050] 1. Instructions for generating high voltage:
[0051] Adopting the high-frequency voltage doubler rectification mode can reduce the volume of the step-up transformer and the volume of the voltage doubler rectifier circuit.
[0052] Such as Figure 4 , T1 high-frequency transformer in the figure, the primary adopts PWM pulse width modulation mode, uses single-ended flyback mode to boost the low-voltage voltage 12V to high-voltage, and then obtains the required high-voltage voltage through voltage doubler rectification, R1 is used as a current-limiting resistor, R5 , R6, R7, R8, R12 form a voltage divider, and the voltage divider is used as high voltage feedback and high voltage measurement.
[0053] When the high voltage is set to 5000V, the feedback voltage is divided into 5000V*(100K / 160M)=3.12V. When the actual output voltage is not 3.12V, the PWM pulse width modulation (PWM-Ctr) will continue to increase the output pulse Wide, until the high-voltage voltage meets the...
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