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产品名称:    防雷线夹 Anti-Lightning Wire Clamp
产品型号:    
所属类别:
    防雷线夹
查看次数:
   1224

 

 

详细介绍

在电网建设中,架空绝缘导线与地下电缆相比,具有投资省,建设快,维护方便等优点,可迅速的推广应用,然而绝缘导线遭受雷击断线的问题时有发生,成为电力配网安全运行麻烦的问题,国外有专家认为:“绝缘导线雷击必断线”。解决这个雷击断线问题相应的防范措施主要有“疏导”和“堵塞”两种方式,“疏导”就是将绝缘子附近的绝缘导线局部裸线化,那样使雷电工频电弧弧根转移或固定在特制金具上烧灼,保护导线免于烧伤,“堵塞”就是雷击闪络后阻止工频续流起弧。上述两种方法虽然都能防止雷击断线,但是仍存在不足,即绝缘导线局部裸线化将对导线的绝缘和密封有一定的影响。因而各种各样架空绝缘导线防雷线夹的研制和开发得到了迅猛的发展,现在生产厂家众多,品种规格繁杂,防雷效果相差悬殊。使用氧化锌避雷器则施工复杂、投资大,并且避雷器中的氧化锌阀片很容易氧化,有效期难以控制,目测无法识别是否失效,需检测才能分辨,避雷效果自然也无法得到真正的发挥。为此我公司发挥专业优势,应用本专业技术研发了JFLKB绝缘穿刺防雷线夹(“间隙防雷”), 它克服了原来产品存在的缺陷或不足,从最经济的角度上满足了架空绝缘导线防雷击的需求,可广泛适用于 10kV 及以下架空绝缘导线上。安装不用剥除导线绝缘层,也不需要换原有的绝缘子及横担,仅加装本产品即可,将该产品安装在架空绝缘导线遭雷击闪路的多发部位,当雷电的过电压超过一定数量值,会在防雷线夹的高压电极和低压电极之间的空气间隙中闪络,形成短路通道。接续的工频短路电流电弧的弧根固定在放电极上燃烧,从而保护架空绝缘导线的熔化断线。安装方便快捷,大大提高现场工作效率。产品经国网武汉高压研究院、上海电气输配电试验中心检测,各项性能均达到国标。 率。产品经国网武汉高压研究院、上海电气输配电试验中心检测,各项性能均达到国标。

When constructing power grid, constructing overhead insulted cables are much faster, cheaper and easy to maintain than constructing underground cables。 However, sometimes the insulated cables break due to lightning strikes, which is a headache for the operation of the power grid。 Some foreign experts maintain that overhead insulated cables would surely break to lightning strikes。 Precautions to be taken to resolve this issue is either to channel or to block。 Channeling is to change part of the insulated wire to bare wire, thus transferring the lightning bolts to burn specially designed instruments rather than the wire。 Blocking is to prevent power frequency arcing after lightning strikes。 Although both methods could prevent the cables breaking, they are not perfect, since changing to bare wire impacts the insulation and sealing of the cables。 Therefore, various anti-lightning devices are developed and produced。 However, the numerous products vary in their effectiveness。 Using zinc oxide arrester requires high investment and complicated construction, moreover, the zinc oxide

valves are highly prone to oxidation. Thus longevity is hard to maintain and it cannot be visually determine

whether the device has failed. Therefore, the arrestor is inconsistent。 Our company has therefore developed

JFLKB insulted piercing wire clamp. It overcame the deficits of its predecessors, and satisfied the need

for lightning protection cheaply. JFLKB insulted  piercing wire clamp can be use to overhead insulated cables with voltage no higher than 10kV。 It does not require peeling off the insulated layer to install, nor

does it need to replace the original insulators and cross arms; it is simply an attachment. Place this product

onto the cable and when the voltage of the lightning exceeds a certain level, a flashover would occur in the

gap between the high voltage electrode and the low voltage electrode, forming a short circut pathway. The

arc root of the power frequency arc would burning in the discharging electrode, thus preventing the

overhead insulated cables from melting and breaking. The simple installation and elegant mechanics, greatly

improves the efficiency. This product is tested by the Wu Han High Voltage Research Institute and the

Shanghai Electrical Transmission and Distribution Testing Center, and its performance matches international standards。

裸导线防雷线夹

Bare Wire Lightning Protection Device


性能特点

Performance Characteristics


裸铝线用的防雷线夹能够妥善解决配电网 35kV 及以下架空裸铝导线雷击断线问题。其原理为:将该防雷线夹安装在绝缘子附近的裸铝导线上(负荷侧),保持一定的放电间隙(如下图所示放电间隙 L1 为该线路所用绝缘子干爬弧距离的 90%),当雷电过电压超过一定数值时,在防雷线夹的高压电极和接地电极之间(L1 距离处)引起闪络,形成短路通道,由于电动力的作用,电弧会逐渐背向电源方向移动,所以接续的工频电弧便在防雷线夹高压电极上(L2 距离处)燃烧,以保护导线和绝缘子免于烧伤断线,直至变电所断路保护开关动作

Bare Wire Anti-lightning Wire Clamp can solve theissue of bare wire power grid reaching 35kV breaking. This product is placed onto the cable and when the voltage of the lightning exceeds a certain level, a flashover would occur in the gap between the high voltage electrode and the grounded electrode (distance L1), forming a short circuit pathway. The arc root of the power frequency arc would burning in the discharging electrode (distance L2), thus preventing the overhead insulated cables from melting and breaking.

裸线防雷线夹的主要技术性能指标

The Key Performance Indicators OfBare Wire Anti-lightning Wire Clamp


1.裸线防雷线夹与导线必需紧密接触,应能通过短路电流试验,短路电流试验用的短路电流有效值和持续时间分为两档:①短路电流有效值取 20kA,持续时间为 0.1s;②短路电流电效值取 10kA,持续时间为 0.5s。

Bare Wire Anti-lightning Wire Clamp should be in tight contact with the wire, and can pass the short circuit test。 The current of the test should have the following effective value and time duration i。 20kA lasting 0。1s ii。10kA lasting 0。5s


2.裸线防雷线夹应通过工频大、小电流电弧试验,试验后高、低压电极允许局部烧蚀,但绝缘导线无烧伤,绝缘罩无严重变形或开裂。大电流电弧试验的短路电流有效值为 12.5kA,时间为 0.3s,试验次数为 5次。小电流电弧试验的短路电流有效值为 1.2kA,时间为 1.0s,试验次数为 5 次。

Insulted Piercing Wire Clamp should pass the high and low frequency current arc test. The two electrodes are allow to burn but the wire should be intact, the insulated cap has no major deformation or crack. i. The current of the high frequency current arc test should have an effective value of 12.5kA, lasting 0.3s 

and repeated 5 times ii. The current of the low frequency current arc test should have an effective value of 1.2kA, lasting 1.0s and repeated 5 times

3.温升≤被接续导线的温升。Temperature increase≤the temperature increase of theconnected cable。


4.载流量≥导线的额定载流量。Current capacity≥the rated current capacity of theconnected cable。


5.高压电极与低压电极的安装距离为绝缘子干爬弧距离的 90%。Safe leakage distance between high and low voltage electrodes should be 90% the dry arc distance of the insulator.


6.  握力≥被接续导线计算拉断力的 10%。Grip≥10% of the tensile strength of the connected cable.


7.  拉断力≥被接续导线计算拉断力的 95%。 Tensile strength≥95% of the theoretical tensile strength of the connected cable.



型号、命名方式

Model And Naming


产品结构尺寸

Structure


规格技术参数表

Models And Technical Parameters



安装方法及要求

Installation Instructions


① 裸铝线用的防雷线夹适用于 P15、P20、PS15 型绝缘子,如遇其他型号绝缘子配合使用时,应与本公司联系。不同标称截面积的绝缘导线要选择对应型号的防雷线夹。产品必须安装在绝缘子的负荷侧(受电侧、非电源侧),防雷线夹的烧灼部位必须与导线平行,并且垂直放置;在周围空旷或无屏蔽的配网地带建议每隔一根电线杆安装一组裸铝线用防雷线夹。根据绝缘子的型号参照说明书测量防雷线夹到绝缘子中心线的距离,要确保 D 和 L 的距离满足下表安装尺寸的要求,以便定位雷电闪络路径,使工频电弧烧灼时不会损伤架空裸铝导线和绝缘子

Bare Wire Anti-lightning Wire Clamp is applicable for P15, P20, PS15 insulators. Contact our company when

applying to other models of insulators. Insulated Wires of different sections should match different models.

This product must be installed on the load side of the insulator. the burning part of the device should be

parallel to the wire and placed perpendicularly. It is recommended that in open areas or unsheltered power

grid, the device should be installed on every other pole. According to the model of the insulator, refer to

the manual for the distance between the device and the middle of the insulator。 Make sure that the distance

between D and L satisfy the following table for the device to work properly.



② 安装防雷线夹时,上压板和下压板必须上下平行放置,拧紧两枚螺母。When installing the clamp, the upper and lower boards should be parallel, twist the two nuts.


③ 拧断力矩螺母后,把锁紧螺母拧上。After twisting off the torque nut, twist on the locknut。

④ 在绝缘子底部安装引弧板,根据绝缘子的型号参照说明书调整防雷线夹至引弧板的距离,不同的绝缘子配套的引弧板形状可能不一,订货时请告知被安装的绝缘子型号或外型尺寸,确保 D 和 L 的距离满足安装尺寸的要求。


3、绝缘穿刺防雷线夹

Insulated Piercing Wire Clamp


性能特点

Performance Characteristics


穿刺型防雷线夹能够妥善解决 10kV 配电网架空绝缘导线雷击断线问题。其原理为:将该线夹安装在绝缘子(负荷侧、受电侧)附近的绝缘导线上,当雷电过电压超过一定数值时,在防雷线夹的穿刺电极和接地电极之间引起闪络,形成短路通道,接续的工频电弧便在防雷线夹上燃烧,以保护导线免于烧伤。

Insulted Piercing Wire Clamp solves the issue with 10kV power grip breaking down due to lightning strikes。 It employs the mechanic of applying this device on a stretch of insulated wire near the insulator (location where lightning strikes), and the device would create a flashover between the punctuated electrode and the grounded electrode, forming a short circuit pathway。 The arc root of the power frequency arc would burning in the discharging electrode, thus preventing the overhead insulated cables from melting and breaking。


1. 运用穿刺的原理,可直接在导线绝缘层上安装,紫铜牙齿穿透导线的绝缘层后顶到导体,达到导线导体和高压电极之间电力传导的目的,在安装施工过程中减少了一道剥去导线绝缘层的工序,大大缩短了安装施工的时间,最大限度地降低了对导线造成的伤害。Insulted Piercing Wire Clamp punctuates the insulated layer and can be installed directed on the wire. The copper chain rings punctuates the insulated layer and reaches the conductor, ensure the conductivity between the conductor and the high voltage electrode. This eliminates the step of peeling off the insulated layer when installing, which is highly efficient and minimizes the damage to the wire.

2. 力矩螺母控制拧紧力度,安装时不必再使用专用的扭力扳手,用套筒扳手(或棘轮套筒扳手)即可安装,那样既可以使高压电极与导体达到可靠的电气接触,又简化了安装的难度。

Installation no longer require a special torque wrench,a normal wrench would suffice, this allow the high voltage electrode and conductor to reach optimal 

electrical contact as well as simplifying the installation process.


3. 结构密封,覆盖在紫铜齿片的电力绝缘油脂在穿刺的过程中会慢慢填满导线绝缘层的穿刺孔,使导体与外界完全密封,保护导线的正常使用寿命。

The structure is still sealed. The insulated grease on the copper chain rings would slowly feel the hole

punctuated, sealing off the conductor and ensures normal longevity of the wire.


4. 上下铝合金压板中的穿刺牙齿采用紫铜制作,铸造的时候镶嵌在铝合金里面,工艺独特,提高了线夹的穿刺能力和导电性能,并且这种工艺方法可以避免铜铝过度电化腐蚀的现象。

The unique design and creating process of the copper chain rings, which are attached to the aluminum alloy

boards when forging, allows for greater conductivity and piercing ability and also prevents electro-chemical

corrosion of copper and aluminum。 


5. 采用碟型垫片弥补热胀冷缩和蠕变的问题,碟型垫片在安装时吸收了一部分的能量,在运行中自动调节牙齿对导线的穿刺力度,保证可靠的电气接触。

The disc-shape gasket compensates for the thermal expansion and contraction as well as creeping issues. The disc-shape gasket absorbs part of the energy when installing, allowing it to automatically adjust the piercing of the chain rings, ensuring sufficient electrical contact.


绝缘穿刺防雷线夹的主要技术性能指标

The Key Performance Indicators Of Insulted Piercing Wire Clamp


1.绝缘穿刺防雷线夹与导线必需紧密接触,应能通过短路电流试验,短路电流试验用的短路电流有效值和持续时间分为两档:①短路电流有效值取 20kA,持续时间为 0。1s;②短路电流电效值取 10kA,持续时间为 0。5s。

Insulted Piercing Wire Clamp should be in tight contact with the wire, and can pass the short circuit test. The current of the test should have the following effective value and time duration i. 20kA lasting 0.1s ii.10kA lasting 0.5s


2.绝缘穿刺防雷线夹应通过工频大、小电流电弧试验,试验后高、低压电极允许局部烧蚀,但绝缘导线无烧伤,绝缘罩无严重变形或开裂。大电流电弧试验的短路电流有效值为 12。5kA,时间为 0。3s,试验次数为 5次。小电流电弧试验的短路电流有效值为 1。2kA,时间为 1。0s,试验次数为 5 次。