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|Product Model:||Metal Oxide Varistor||Material:||Zinc Oxide|
zinc oxide varistor,
high voltage varistor
High-performance Metal Oxide Zinc Varistor Disc Manufacturers
Metal oxide Varistor For surge arrester
Zinc oxide varistor is the core of the arrester,which main component is Zinc Oxide and with a small quantity of bismuth oxide, fluoride oxide, manganous carbonate, antimony oxide and other gleam of additive and made with high temperature.
Metal oxide Varistors microsturcture mainly constitute of Zinc Oxide grain, grain boundary layer and chienship phase. And its electric conduction principle lies that Zinc Oxide grain has good electro conductibility, and the voltage to the Zinc Oxide is almost act on high resistant grain boundary layer. Varistors nonlinearity mainly comes from grain boundary layer(the main ingredient is bismuth oxide) chienship phase scattered throughout the grain boundary layer which is the multiple oxide of Zinc Oxide and bismuth oxide. Its function lies in restraining the growing of Zinc Oxide grain to make the better nonlinearity.
Large 2000μs rectangular impulse absorption capacity.
|Type||D62 Metal Oxide Varistor(MOV)|
|Voltage Gradient V/mm||210~235|
|Square Wave Test Valve||800|
|4/20μ S High Current Withstand kA||120|
|8/20μ S high current withstand kA / 10 kA||9.3|
|DC1mA Refering Voltage kV||5.35|
|0.75Times U1mA Leak current μ A <||50|
|Residual Votage Ratio||1.73|
|Aging Load Point Ratio%||90|
1. Metal oxide Varistor For surge arrester
2. Since 1983
4. Good non-linear characteristics.
5. Full face metalized electrodes.
6. 100% production tested.
7. All ratings available,accept customized
Zinc Oxide Varistor is widely used in large filed of lightening protection,they are
specified according to the voltage range that they can tolerate without damage.
Other important parameters are the varistor's energy rating in joules, operating
voltage, response time, maximum current, and breakdown (clamping) voltage.
Energy rating is often defined using standardized transients such as 8/20
microseconds or 10/1000 microseconds, where 8 microseconds is the transient's
front time and 20 microseconds is the time to half value.
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