上海上民HY5WX-17/45线路避雷器氧化锌

HY5WX-17/45线路避雷器HY5WX-12.7/45氧化锌避雷器

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线路避雷器设计技术

    无间隙线路避雷器的成功应用得益于硅橡胶复合材料，它取代了原有瓷外套，使220kV避雷器的质量从260kg降至50kg以下，从而实现在杆塔上悬挂安装。有串联间隙线路避雷器由避雷器本体和外串联间隙组成。本体与普通的复合外套避雷器相当，外串联间隙（放电间隙）由两个环–环或棒–棒型放电电*组成。

    避雷器本体两端采用金属法兰封口，内部装有非线性ZnO电阻片并用弹簧压紧的环氧玻璃纤维布筒，其外部采用硅橡胶伞裙包封。这样，避雷*大减少了因“漏气”而带来的受潮问题。

    上、下法兰设计了经典的球头、球窝，分别与高压端、接地端连接。以2003年我国天生桥—广州线投入使用的500kV有间隙线路避雷器设计为例，除秉承电站避雷器技术基础外，还*须解决如下8点关键技术问题：

（1）优良性能的硅橡胶复合外套

    采用硅橡胶等**缘材料生产的避雷器复合外套*须具备耐天侯、*紫外线、耐电蚀损等优良性能。与瓷套相比，硅橡胶复合外套在重量、耐污性能上占有很大优势，详见表1。复合外套可选用的材料、品种很多。

    （2）具备耐久性粘接技术

    避雷器在多年使用中要经受引线拉力、线震、风摆、冰雪等的作用。上、下法兰与环氧玻璃纤维布筒的粘接部分是避雷器负载力传递区域，也是密封技术的薄弱环节。笔者认为，采用高温、*度环氧浇合剂和倒锥形结构是目前*成功的设计之一，实践也证明了这一点。

    （3）对接口的包封技术

    包封硅橡胶复合外套上、下法兰与环氧玻璃布筒连接的外露面是避雷器加强密封的良策，也是*电蚀损的又一*措施。目前许多国外同类产品在工艺上亦未能实现这样的包封；但*须*硅橡胶与法兰各种金属材料及热处理后的镀层之间有良好的粘合。此外，可在法兰上增加一个下大上小的槽形结构，以增强硅橡胶不出现脱胶的机械应力。

    （4）*爆技术

    为取得良好的*爆性能可在模压硫化伞裙前将环氧玻璃纤维筒*出长条梯形槽，并用*楔形嵌件堵紧。梯形槽在避雷器故障时起排气作用，楔形嵌件*注塑时硅橡胶不至于进入环氧玻璃纤维布筒内腔。梯形槽的长度、数量、*爆力须经严格计算及试验求得。该型避雷器在中国及俄罗斯都通过了40kA和800A的短路电流试验。

英文翻译：
Line lightning arrester design technology

No clearance line lightning arrester of successful application benefit from silicone rubber compound material, it replaces the original porcelain coat, make 220 kV lightning arrester quality from 260 kg down to below 50 kg, thus realize in the tower hung up on. A series circuit by lightning arrester between ontology and the series of clearance. Ontology and the common compound coat lightning arrester quite, the gap in series (the spark gap) by two ring-ring or nice-great t*e of discharge electrode.

Lightning arrester ontology using metal flange sealing at both ends, the inner is equipped with nonlinear ZnO resistors and spring pressure epoxy gl* fiber cloth tube, its external use of silicone rubber umbrella skirt seaied. So, lightning arrester greatly reducing the "gas" brought the damp problem.

On the flange design, the cl*ic ball head, ball nests, and the high pressure end, grounding are connected. In 2003, our country TianShengQiao-guangzhou line into use, 500 kV have clearance line lightning arrester design as an example, in addition to adhering to the power station technology base outside arresters, must solve the following eight key technology problems:

(1) the excellent properties of silicone rubber compound coat

The organic silicone rubber insulation material production lightning arrester composite coat must have resistance to day hou, ultraviolet resistance, excellent properties, such as electrical erosion loss. Compared with porcelain jacket, silicone rubber compound coat in weight, be able to bear or endure corrupt performance advantage holds a large, see table 1. Composite coat can be the selection of material, breed is very much.

(2) have the durability of adhesive technology

Lightning arrester in years of use of be subjected to lead pulling force, line, the wind place, snow and ice shock the action. On, under flange and epoxy gl* fiber cloth of cylinder adhesive part is lightning arrester load bearing transfer area, also is the weak link of sealing technology. The author thinks that, using high temperature, high strength pour mixture and the epoxy cone-shaped structure is one of the most successful design, and the practice is proof of that.

(3) the docking port bag sealing technology

Silicone rubber compound bag sealed coat, flange to the epoxy gl* cloth tube connection is the appearance of the seal of lightning arrester strengthen shareholder, is to prevent the loss of electrical erosion and effective measures. At present a lot of the same products abroad in process also failed to realize such a bag seal; But must ensure that silicone rubber and all kinds of metal flange material and heat treatment between the coating after good adhesion. In addition, can increase the flange under a big *all tank t*e structure, in order to enhance the silicone rubber does not appear come unglued mechanical stress.

(4) explosion-proof technology

To get a good explosion protection performance can be in moulding vulcanization umbrella skirt epoxy gl* fiber tube before the trapezoidal strip processing groove, and special wedge embedded a blocking tight. Trapezoidal slot in the lightning arrester fault when the exhaust effect, wedge a guarantee when embedded injection silicone rubber not into epoxy gl* fiber cloth cavity in the cylinder. The length of the trapezoidal slot, quantity, explosion-proof force must be approved by strictly calculation and test for. This t*e of lightning arrester in China and Russia all through the 40 kA and 800 A short circuit current test.

型号/规格

HY5WX-17

品牌/商标

上海上民