上海上民HY5WD-17.5/40氧化锌避雷器

HY5WD-17.5/40氧化锌避雷器HY5WD-13.5/31避雷器

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简述
　　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*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，*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。

介绍
　　氧化锌避雷器测试仪介绍：采用微电脑进行采样、控制等*技术，可测量氧化锌避雷器在工频电压下的全电流、三次谐波、阻性电流、阻性电流峰值、容性电流、有功功率等。

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*开关电压（叫压敏电阻），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*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。然而压敏电阻被击状态，是可以恢复的；当高于压敏电压的电压撤销后，它又恢复了高阻状态。因此，在电力线上如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，使电源线上的电压控制在*范围内，从而保护了电器设备的*。

1.按电压等级分　　氧化锌避雷器按额定电压值来分类，可分为三类；　　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500kV、220kV、110kV、66kV四个等级等级。　　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。　　2.按标称放电电流分　　氧化锌避雷器按标称放电电流可划分为20、10、5、2.5、1.5kA五类。　　3.按用途分　　氧化锌避雷器按用途可划分为系统用线路型、系统用电站型、系统用配电型、并联补偿电容器组保护型、电气化铁道型、电动机及电动机中性点型、变压器中性点型七类。　　4.按结构分　　氧化锌避雷器按结构可划分为两大类；　　瓷外套；瓷外套氧化锌避雷器按耐污秽性能分为四个等级，Ⅰ级为普通型、Ⅱ级为用于中等污秽地区（爬电比距20mm/KV）、Ⅲ级为用于重污秽地区（爬电比距25mm/kV）、Ⅳ级为用于特重污秽地区（爬电比距31mm/kV）。　　复合外套；复合外套氧化锌避雷器是用复合硅橡胶材料做外套，并选用*的氧化锌电阻片，内部采用*结构，用*工艺方法装配而成，具有硅橡胶材料和氧化锌电阻片的双重优点。该系列产品除具有瓷外套氧化锌避雷器的*优点外，另具有*缘性能、高的耐污秽性能、良好的*爆性能以及体积小、重量轻、平时不需维护、不易破损、密封*、耐老化性能优良等优点。　　5.按结构性能分　　氧化锌避雷器按结构性能可分为；无间隙（W）、带串联间隙（C）、带并联间隙（B）三类。

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英文翻译：
this
Zinc oxide lightning arrester is a good protection lightning arrester performance. Using zinc oxide good volt-amper characteristics, that in normal working voltage when the current flows through lightning arrester tiny (microamps or milliamperes); When overvoltage effect, resistance fell sharply, let go of the voltage of the discharge energy, obtain protection effect. The lightning arrester and traditional lightning arrester the difference is it not the spark gap, using zinc oxide nonlinear characteristics and play the role of discharge open circuit.

introduction
Zinc oxide lightning arrester tester is introduced: sample by microcomputer control, advanced technology, can be used to measure the zinc oxide lightning arrester in industrial frequency voltage current, three times the harmonic current, resistance, resistance of *ual current peak, capacitive current, active power and so on.

Development source
Zinc oxide lightning arrester is developed in the seventy s a new t*e of lightning arrester, it mainly consists of zinc oxide pressure sensitive resistance constitutes. Every piece of pressure sensitive resistance is made from a certain it switching voltage (called thermistors), in the normal working voltage (i.e. less than pressure sensitive voltage) pressure sensitive resistance is very big, equivalent to insulation states, but in under the action of impulse voltage (more than pressure sensitive voltage), pressure sensitive resistance is low value is punctured, equivalent to short circuit state. However thermistors be hit state, is can be restored; When higher than pressure sensitive voltage after the cancellation of the voltage, it's back high impedance condition. Therefore, in a powerline such as the installation zinc oxide lightning arrester, when lightning, ray waves of high voltage make thermistors breakdown, lightning overvoltage sensitive resistance into the land circulation, make the power line voltage control in the security limits, and can protect the safety of the electrical equipment.

1. According to the voltage are rated by zinc oxide lightning arrester rated voltage value to cl*ification, can be divided into three groups; High pressure cl*es; It refers to the level of 66 KV above zinc oxide lightning arrester series product, can be roughly divided into 500 KV, 220 KV, 110 KV, 66 KV four grade level. Medium voltage cl*; It refers to the three kV ~ 66 kV (not including 66 kV series products) within the scope of the zinc oxide lightning arrester series product, can be roughly divided into three kV, 6 kV, 10 kV, 35 kV voltage grade four. Low pressure cl*es; It refers to the following 3 KV (not including 3 KV series products) of zinc oxide lightning arrester series product, can be roughly divided into 1 KV, 0.5 KV, 0.38 KV, 0.22 KV voltage grade four. 2. According to the nominal discharge current points zinc oxide lightning arrester in nominal discharge current can be divided for 20, 10, 5, 2.5, 1.5 kA five categories. 3. According to utility cent zinc oxide lightning arrester can be divided according to use for the system with line t*e, t*e, with power station system in distribution, parallel, and series-parallel system of compensation capacitor group protection t*e, t*e, electrified railway electric motor and motor neutral t*e, t*e transformer neutral point of seven. 4. According to the structure points zinc oxide lightning arrester according to the structure can be divided into two major categories; Porcelain coat; Porcelain coat zinc oxide lightning arrester resistance performance according to uncleanness is divided into four grades, Ⅰ level common t*e, Ⅱ level for medium filthy area (*age distance than 20 mm/KV), Ⅲ level used in heavy impurity area (*age distance than 25 mm/KV), Ⅳ level used for higher in filthy (*age distance than 31 mm/KV). Composite coat; Composite coat zinc oxide lightning arrester is using composite silicone rubber material do coat, and a high-quality zinc oxide resistors, internal adopts special structure, with advanced technology and method to *embly, with silicone rubber material and zinc oxide resistors of dual advantages. This series of products is in addition to coat zinc oxide porcelain all the advantages of lightning, and the other has the high resistance insulation performance, unclean performance, excellent explosion-proof performance and *all volume, light weight, at ordinary times require less maintenance, not dilapidation easily, sealing is reliable, ageing resistance performance, etc. 5. According to the structure performance points zinc oxide lightning arrester according to the structure performance can be divided into; No clearance (W), take series clearance (C), with parallel clearance (B) three categories.

型号/规格

HY5WD-17.5

品牌/商标

上海上民