A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning. The typical lightning arrester has a high-voltage terminal and a ground terminal. When a lightning surge (or switching surge, which is very similar) travels along the power line to the arrester, the current from the surge is diverted through the arrester, in most cases to earth.
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| - Bleskojistka (cs)
- Lightning arrester (en)
- 避雷器 (ja)
- 피뢰기 (ko)
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| - 피뢰기(lightning arrester)는 에서 시스템의 절연이 번개로 인해 손상되지 않도록 보호하는 기구다. 산화금속 배리스터(Metal oxide varistors, MOVs)는 1970년대 중반부터 전력 시스템을 보호하기 위해 쓰였다. 전형적인 피뢰기는 고압 단자와 접지 단자가 있다. 뇌 서지(lightning surge)와 스위칭 서지가 전력 시스템에서 피뢰기로 이동하면, 서지 전류가 피보호 절연으로 흐르지 않고, 대지로 방전된다. (ko)
- 避雷器(ひらいき、英: lightning arrester)は、発電、変電、送電、配電系統の電力機器や電力の供給を受ける需要家の需要機器、有線通信回線、空中線系、通信機器などを、雷などにより生じる過渡的な異常高電圧から保護する、いわゆるサージ防護機器のひとつである。日本では、サージ防護機器全てを避雷器と呼ぶこともあるが、ここでは国際電気標準会議 (IEC) および日本産業規格 (JIS) に定める「サージ防護デバイス」 (SPD: Surge Protective Device) について述べる。 (ja)
- Bleskojistka je zařízení, které chrání elektrická vedení a přístroje před bleskem, případně i před přepětím jiného původu. Nejjednodušší bleskojistka je se dvěma elektrodami: jedna je spojena s chráněným vodičem, druhá se zemí. Při výrazném překročení nominálního napětí vznikne mezi elektrodami elektrický výboj, který energii svede do země. U moderních bleskojistek bývá jiskřiště umístěno v ochranné atmosféře, často v keramické trubičce. Oprava vnější bleskojistky na stožáru VVN (cs)
- A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning. The typical lightning arrester has a high-voltage terminal and a ground terminal. When a lightning surge (or switching surge, which is very similar) travels along the power line to the arrester, the current from the surge is diverted through the arrester, in most cases to earth. (en)
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| - Bleskojistka je zařízení, které chrání elektrická vedení a přístroje před bleskem, případně i před přepětím jiného původu. Nejjednodušší bleskojistka je se dvěma elektrodami: jedna je spojena s chráněným vodičem, druhá se zemí. Při výrazném překročení nominálního napětí vznikne mezi elektrodami elektrický výboj, který energii svede do země. U moderních bleskojistek bývá jiskřiště umístěno v ochranné atmosféře, často v keramické trubičce. Jako bleskojistka může sloužit i neonová trubice nebo jiná výbojka s vysokým startovacím napětím nebo polovodičový prvek (varistor, tyristor, Zenerova dioda). Oprava vnější bleskojistky na stožáru VVN (cs)
- A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning. The typical lightning arrester has a high-voltage terminal and a ground terminal. When a lightning surge (or switching surge, which is very similar) travels along the power line to the arrester, the current from the surge is diverted through the arrester, in most cases to earth. In telegraphy and telephony, a lightning arrester is placed where wires enter a structure, preventing damage to electronic instruments within and ensuring the safety of individuals near them. Smaller versions of lightning arresters, also called surge arresters, are devices that are connected between each conductor in power and communications systems and the earth. These prevent the flow of the normal power or signal currents to ground, but provide a path over which high-voltage lightning current flows, bypassing the connected equipment. Their purpose is to limit the rise in voltage when a communications or power line is struck by lightning or is near to a lightning strike. If protection fails or is absent, lightning that strikes the electrical system introduces thousands of kilovolts that may damage the transmission lines, and can also cause severe damage to transformers and other electrical or electronic devices. Lightning-produced extreme voltage spikes in incoming power lines can damage electrical home appliances or even cause death. Lightning arresters are used to protect electric fences. They consist of a spark gap and sometimes a series inductor. Such type of equipment is also used for protecting transmitters feeding a mast radiator. For such devices the series inductance has usually just one winding. Lightning arresters can form part of large electrical transformers and can fragment during transformer ruptures. High-voltage transformer fire barriers are required to defeat ballistics from small arms as well as projectiles from transformer bushings and lightning arresters, per NFPA 850. (en)
- 피뢰기(lightning arrester)는 에서 시스템의 절연이 번개로 인해 손상되지 않도록 보호하는 기구다. 산화금속 배리스터(Metal oxide varistors, MOVs)는 1970년대 중반부터 전력 시스템을 보호하기 위해 쓰였다. 전형적인 피뢰기는 고압 단자와 접지 단자가 있다. 뇌 서지(lightning surge)와 스위칭 서지가 전력 시스템에서 피뢰기로 이동하면, 서지 전류가 피보호 절연으로 흐르지 않고, 대지로 방전된다. (ko)
- 避雷器(ひらいき、英: lightning arrester)は、発電、変電、送電、配電系統の電力機器や電力の供給を受ける需要家の需要機器、有線通信回線、空中線系、通信機器などを、雷などにより生じる過渡的な異常高電圧から保護する、いわゆるサージ防護機器のひとつである。日本では、サージ防護機器全てを避雷器と呼ぶこともあるが、ここでは国際電気標準会議 (IEC) および日本産業規格 (JIS) に定める「サージ防護デバイス」 (SPD: Surge Protective Device) について述べる。 (ja)
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