Selection and application of Voltage Dependent Resistor

1.Commonly used voltage sensitive voltage, that is, dielectric strength or threshold voltage. It refers to the voltage value under the delineation of the current, in most cases the voltage value measured when the nominal voltage sensitive voltage DC current is passed into the Voltage Dependent Resistor, and the pressure sensitive voltage limit of the product is allowed to be about 10PF-10KV. It can be selected correctly according to the detailed requirements. VP is the instantaneous value of the nominal voltage of a circuit, usually known as the "1" 2VAC formula. VAC is the square root value of the rated AC voltage. The selection of voltage value of Zinc Oxide Voltage Dependent Resistor is very critical, which relates to the protection effectiveness and service life.

2.The current flow capacity, that is, the instantaneous value of the pulse current is the use of the temperature of 30 degrees centigrade, with regard to the specified shock current waveform and the number of delimited impact currents, the change of the voltage sensitive voltage is not higher than the pulse current of 10%. In order to extend the service life of Voltage Dependent Resistor, the surge current derived from Zinc Oxide Voltage Dependent Resistor should be less than the pass flow of the product given. However, in terms of protection effect, it is desirable to choose a larger traffic volume. In many cases, the real throughput is difficult to calculate accurately. The 2-20 rated current Voltage Dependent Resistor is adopted.