SP insulators

Japanese: SP がいし - えすぴーがいし
SP insulators

...The purpose of the arc horn is to cause a flashover between the horns due to a lightning strike or other cause, thereby preventing the insulators from being destroyed by the heat of the arc.
[Substation insulators]
Substations contain a variety of electrical equipment and use a variety of insulators, which can be broadly divided into station post (SP) insulators and insulator tubes. As shown in Figure 8, SP insulators are rod-shaped solid insulators used for insulating support of electrical equipment such as conductors and capacitors, and for disconnectors.

*Some of the terminology that refers to "SP insulators" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…アークホーンは,落雷などによるフラッシオーバーをホーン間に起こさせて,がいしがアーク熱によって破壊されないようにするのが目的である。
[変電所用がいし]
 変電所にはいろいろな電気設備があり,さまざまながいしが使用されているが,大別するとSP(station post)がいしとがい管に分けられる。SPがいしは図8に示すように,棒状の中実がいしで,導体やコンデンサーなど電気設備の絶縁支持や断路器に使用される。…

※「SP がいし」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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