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金属氧化物避雷器的优点
金属氧化物避雷器的优点
Advantages of metal oxide arresters
只有压敏电阻片的新型避雷器，压敏电阻片是由氧化锌等金属氧化物烧结而成的多晶半导体陶瓷元件，具有理想的阀特性。同时具有非线性系数小、保护特性好、能量吸收能力强、通流能力大、结构简单和稳定性好等优点。
Only a new type of lightning arrester with a varistor, the varistor is a polycrystalline semiconductor ceramic element made from Zinc Oxide and other metal oxides. It has an ideal valve characteristic. At the same time, it has the advantages of small nonlinear coefficient, good protection characteristics, strong energy absorption capability, large flow capacity, simple structure and good stability.
非线性系数α 值很小。在金属氧化物阀片中通过1mA～10kA这个范围内电流时，α 值一般在0.02～0.06之间。在额定电压作用下，通过的电流极小，因此可以做成无间隙避雷器。保护性能好。它不需要间隙动作，电压一旦升高，即可迅速吸收过电压能量，抑制过电压的发展；有良好的陡度响应特性；无间隙的氧化物避雷器的性能几乎不受温度、湿度、气压、污秽等环境条件的影响，因而性能稳定。
The alpha value of the nonlinear coefficient is very small. When the current is in the range of 1mA to 10kA in the metal oxide valve, the alpha value is generally between 0.02 and 0.06. Under the action of rated voltage, the current passed through is very small, so it can be used as a gap free lightning arrester. Good protection performance. It does not need clearance action. Once the voltage is raised, it can quickly absorb over voltage energy, restrain the development of overvoltage, have good steepness response characteristics, and the performance of no gap oxide arrester is almost unaffected by temperature, humidity, air pressure, pollution and other environmental conditions, thus the performance is stable.
金属氧化物避雷器基本无续流，动作负载轻，耐重复动作能力强。伏安特性是对称的，没有极性问题，可制成直流避雷器。
MOA basically has no continuous current, light load and strong repetition resistance. The volt ampere characteristic is symmetrical, without polarity, it can be made into DC arrester.
通流容量大。避雷器容易吸收能量，没有串联间隙的制约，仅与阀片本身的强度有关。同碳化硅阀片比较，氧化物阀片单位面积的通流能力大4～4.5倍。因此，用这样的阀片制成避雷器，不但可以限制大气过电压，而且完全可以用来限制操作过电压，甚至还可以耐受一定持续时间的短时（工频）过电压。
The flow capacity is large. The lightning arrester is easy to absorb energy, and has no restriction on the series gap. It is only related to the strength of the valve itself. Compared with silicon carbide valve, the flow capacity of oxide valve area per unit area is 4 to 4.5 times larger than that of silicon carbide valve. Thus, a lightning arrester made of such a valve can not only limit the overvoltage of the atmosphere, but also can be used to limit the overvoltage, and can even tolerate short time overvoltages for a certain duration.
Advantages of metal oxide arresters
只有压敏电阻片的新型避雷器，压敏电阻片是由氧化锌等金属氧化物烧结而成的多晶半导体陶瓷元件，具有理想的阀特性。同时具有非线性系数小、保护特性好、能量吸收能力强、通流能力大、结构简单和稳定性好等优点。
Only a new type of lightning arrester with a varistor, the varistor is a polycrystalline semiconductor ceramic element made from Zinc Oxide and other metal oxides. It has an ideal valve characteristic. At the same time, it has the advantages of small nonlinear coefficient, good protection characteristics, strong energy absorption capability, large flow capacity, simple structure and good stability.
非线性系数α 值很小。在金属氧化物阀片中通过1mA～10kA这个范围内电流时，α 值一般在0.02～0.06之间。在额定电压作用下，通过的电流极小，因此可以做成无间隙避雷器。保护性能好。它不需要间隙动作，电压一旦升高，即可迅速吸收过电压能量，抑制过电压的发展；有良好的陡度响应特性；无间隙的氧化物避雷器的性能几乎不受温度、湿度、气压、污秽等环境条件的影响，因而性能稳定。
The alpha value of the nonlinear coefficient is very small. When the current is in the range of 1mA to 10kA in the metal oxide valve, the alpha value is generally between 0.02 and 0.06. Under the action of rated voltage, the current passed through is very small, so it can be used as a gap free lightning arrester. Good protection performance. It does not need clearance action. Once the voltage is raised, it can quickly absorb over voltage energy, restrain the development of overvoltage, have good steepness response characteristics, and the performance of no gap oxide arrester is almost unaffected by temperature, humidity, air pressure, pollution and other environmental conditions, thus the performance is stable.
金属氧化物避雷器基本无续流，动作负载轻，耐重复动作能力强。伏安特性是对称的，没有极性问题，可制成直流避雷器。
MOA basically has no continuous current, light load and strong repetition resistance. The volt ampere characteristic is symmetrical, without polarity, it can be made into DC arrester.
通流容量大。避雷器容易吸收能量，没有串联间隙的制约，仅与阀片本身的强度有关。同碳化硅阀片比较，氧化物阀片单位面积的通流能力大4～4.5倍。因此，用这样的阀片制成避雷器，不但可以限制大气过电压，而且完全可以用来限制操作过电压，甚至还可以耐受一定持续时间的短时（工频）过电压。
The flow capacity is large. The lightning arrester is easy to absorb energy, and has no restriction on the series gap. It is only related to the strength of the valve itself. Compared with silicon carbide valve, the flow capacity of oxide valve area per unit area is 4 to 4.5 times larger than that of silicon carbide valve. Thus, a lightning arrester made of such a valve can not only limit the overvoltage of the atmosphere, but also can be used to limit the overvoltage, and can even tolerate short time overvoltages for a certain duration.
