氧化锌避雷器的试验方法有哪些?

2025-03-21 13:13:08
推荐回答(3个)
回答1:

氧化锌避雷器的试验方法:

1、绝缘电阻;

2、直流电压和直流泄露电;

3、放电计数器校验。 

氧化锌避雷器

具有良好保护性能的避雷器。利用氧化锌良好的非线性伏安特性,使在正常工作电压时流过避雷器的电流极小(微安或毫安级);当过电压作用时,电阻急剧下降,泄放过电压的能量,达到保护的效果。这种避雷器和传统的避雷器的差异是它没有放电间隙,利用氧化锌的非线性特性起到泄流和开断的作用。

发展来源

氧化锌避雷器是七十年代发展起来的一种新型避雷器,它主要由氧化锌压敏电阻构成。每一块压敏电阻从制成时就有它的一定开关电压(叫压敏电压),在正常的工作电压下(即小于压敏电压)压敏电阻值很大,相当于绝缘状态,但在冲击电压作用下(大于压敏电压),压敏电阻呈低值被击穿,相当于短路状态。然而压敏电阻被击后,是可以恢复绝缘状态的;当高于压敏电压的电压撤销后,它又恢复了高阻状态。因此,如在电力线上安装氧化锌避雷器后,当雷击时,雷电波的高电压使压敏电阻击穿,雷电流通过压敏电阻流入大地,可以将电源线上的电压控制在安全范围内,从而保护了电气设备的安全。

器械介绍

具有良好保护性能的避雷器。利用氧化锌良好的非线性伏安特性,使在正常工作电压时流过避雷器的电流极小(微安或毫安级);当过电压作用时,电阻急剧下降,泄放过电压的能量,达到保护的效果。

回答2:

氧化锌避雷器是具有良好保护性能的避雷器。利用氧化锌良好的非线性伏安特性,使在正常工作电压时流过避雷器的电流极小(微安或毫安级);当过电压作用时,电阻急剧下降,泄放过电压的能量,达到保护的效果。这种避雷器和传统的避雷器的差异是它没有放电间隙,利用氧化锌的非线性特性起到泄流和开断的作用。

根据不同的分类依据,氧化锌避雷器会分为很多类别。一般情况下,人们会根据避雷器的额定电压值来分类,通常分为高压类、中压类、低压类。

高压类;其指66KV以上等级的氧化锌避雷器系列产品,大致可划分为1000kV、750kV、500kV、330kV、220kV、110kV、66kV七个等级。

中压类;其指3kV~66kV(不包括66kV系列的产品)范围内的氧化锌避雷器系列产品,大致可划分为3kV、6kV、10kV、35KV四个电压等级。

低压类;其指3KV以下(不包括3kV系列的产品)的氧化锌避雷器系列产品,大致可划分为1kV、0.5kV、0.38kV、0.22kV四个电压等级。

根据《GB50150-2006电气装置安装工程电气设备交接试验标准》规定,在避雷器投入使用之前,一定要进行以下试验项目:

1.绝缘电阻测试

2.直流耐压试验

3.交流泄露电流试验

回答者:三新电力

回答3:

1、测量绝缘电阻
2、 GDYZ-301直流1mA电压U1mA及0.75倍U1mA下泄漏电流
3、运行电压下的交流泄露电流
4、工频参考电流下的工频参考电压
5、底座绝缘电阻
6 放电计数器动作检查

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