Rega Transmission Line Surge Arrester
Introduction2
Numerous technical publications have stated that lightning is responsible for approximately 65% of all
of the non-scheduled outages occurring on transmission lines, thus creating many issues for power
supply utilities.
Power supply utilities themselves have verified the load losses due to voltage sags on their systems
from transitory outages caused by lightning activity and in some regions they have found serious
permanent damage caused to the system itself due to these transitory disturbances
occurring on important lines.
The effect of these transitory disturbances on transmission lines can also be more critical in areas with
high ground resistivity when associated with high lightning activity.
Although it is a fact that most of the non-scheduled outages are transitory in nature, with a fault time
shorter than 1 minute, in many cases this is still deemed, by power supply utilities and their customers,
to be unacceptable. This loss of supply is critical for all modern industries now
so reliant on sophisticated electronic equipment and especially production processes sensitive to
momentary disturbances on the system.
In order to reduce the number of non-scheduled outages in electrical systems, power companies and
industrial consumers have been studying and promoting improvements to transmission lines thereby
increasing their reliability.
There are different methods to improve transmission lines performance due to lightning:
a) Increase the dry arcing distance from the insulators strings.
b) Install shield wires on lines without shield wires.
c) Improve the shield wire performance.
d) Improve the grounding system performance of surges by improving the tower footing
resistance.
e) Installation of transmission line arresters to counteract the effects of lightning or switching
activity
In most cases line arresters (TLA), electrically connected in parallel with the insulator string, have been
considered as the most effective method currently applied to improve transmission line performance
especially when associated with improvements to the grounding system and usually presents the best
benefit versus cost relationship in reducing flashovers of the insulator string due to excessive voltages.

简介

众多的技术出版物都表示，闪电是负责所有的约65％
非计划停机发生在输电线路，从而为电力创造了许多问题
提供工具。
电源实用程序本身已经验证了负载损耗，由于电压骤降在他们的系统
由雷电引起的活动，并在一些地区短暂停电，他们已经发现了严重的
造成系统本身造成永久性损坏，由于这些短暂的干扰
对重要线路发生。
对输电线路这些短暂干扰的影响也可以更关键的领域与
当具有高雷电活动相关的高地上电阻率。
虽然这是一个事实，大多数的非计划停机的是过渡性质的，具有故障时间
短于1分钟，在许多情况下，这仍然认为，通过电源公用事业公司及其客户，
是不可接受的。现在这种损失的供应是至关重要的所有现代工业
对精密电子设备如此依赖，尤其是生产过程对敏感
瞬时扰动系统。
为了减少非计划停机的电力系统，电力公司和数字
工业用户一直在研究和推动改进输电线路，从而
提高其可靠性。

有不同的方法，以提高输电线路的性能：

a）由绝缘子串增加干弧距离。
b）无屏蔽线安装上线屏蔽线。
c）改善屏蔽线的性能。
d）以改善塔基改善激增的接地系统性能
阻力。
E）安装输电线路避雷器，以抵消雷击或开关的作用
活动
在大多数情况下，线路避雷器（TLA），与绝缘子串并联电连接，已经认为按照目前的应用，提高了传输线性能的最有效的方法尤其是当与改进的接地系统相关联，并且通常表现为最好对受益于降低绝缘子串闪络因电压过高的成本关系。

Rega Transmission Line Surge Arrester

Introduction

Numerous technical publications have stated that lightning is responsible for approximately 65% of all
of the non-scheduled outages occurring on transmission lines, thus creating many issues for power
supply utilities.
Power supply utilities themselves have verified the load losses due to voltage sags on their systems
from transitory outages caused by lightning activity and in some regions they have found serious
permanent damage caused to the system itself due to these transitory disturbances
occurring on important lines.
The effect of these transitory disturbances on transmission lines can also be more critical in areas with
high ground resistivity when associated with high lightning activity.
Although it is a fact that most of the non-scheduled outages are transitory in nature, with a fault time
shorter than 1 minute, in many cases this is still deemed, by power supply utilities and their customers,
to be unacceptable. This loss of supply is critical for all modern industries now
so reliant on sophisticated electronic equipment and especially production processes sensitive to
momentary disturbances on the system.
In order to reduce the number of non-scheduled outages in electrical systems, power companies and
industrial consumers have been studying and promoting improvements to transmission lines thereby
increasing their reliability.

There are different methods to improve transmission lines performance due to lightning:

a) Increase the dry arcing distance from the insulators strings.
b) Install shield wires on lines without shield wires.
c) Improve the shield wire performance.
d) Improve the grounding system performance of surges by improving the tower footing
resistance.
e) Installation of transmission line arresters to counteract the effects of lightning or switching
activity
In most cases line arresters (TLA), electrically connected in parallel with the insulator string, have been
considered as the most effective method currently applied to improve transmission line performance
especially when associated with improvements to the grounding system and usually presents the best
benefit versus cost relationship in reducing flashovers of the insulator string due to excessive voltages.