Introduction to series and pairing of varistor

Introduction to series and pairing of varistors The technicians who use varistors will know that varistor is very good and can be used in series, that is, we can

The varistor voltage of the varistor is connected in series with the same or the same diameter of the resistor body of the two varistor resistors

And the continuous working voltage and the limiting voltage are added together. At this time, the varistor's flux is constant, we can say for example

Under the hood, for example, in the lightning protection device of high-voltage power supply, the voltage requirement for continuous operation can reach several thousand volts, even tens of thousands of volts.

Therefore, such a high continuous operating voltage is obtained by connecting the resistance valves of the varistor in series.

If you want to get a larger flow rate of the varistor, we can use the varistor in parallel, and there is a way to make it

The varistor's flux can be made larger, and we can reduce the current density in the resistor under certain conditions of the inrush current.

To reduce the limiting voltage of the varistor.

However, in order to obtain a larger flow rate, it is generally between 50-200KA, and the varistor voltage is required to be relatively low.

In the case of 200 volts or less, the ratio of the diameter to the thickness of the resistor body will appear large, and such requirements are in manufacturing technology.

There will be difficulties, and as the diameter of the resistor body will continue to increase, the micro-uniformity of the varistor resistor will be deteriorated.

, so we can be sure that the flow rate does not increase with the area ratio of the resistor body, so we need to change the recipe at this time.

The method can be paralleled by a resistor Valve of a varistor having a relatively small diameter.


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