{"id":750,"date":"2023-12-19T20:39:19","date_gmt":"2023-12-19T12:39:19","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&p=750"},"modified":"2024-09-05T16:35:09","modified_gmt":"2024-09-05T08:35:09","slug":"how-surge-protection-devices-protect-photovoltaic-plants","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/hu\/blog\/how-surge-protection-devices-protect-photovoltaic-plants\/","title":{"rendered":"Hogyan v\u00e9dik a t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi eszk\u00f6z\u00f6k a fotovoltaikus n\u00f6v\u00e9nyeket"},"content":{"rendered":"A fotovillamos er\u0151m\u0171vekben az SPD-knek speci\u00e1lis k\u00f6vetelm\u00e9nyeknek kell megfelelni\u00fck a folyamatos m\u0171k\u00f6d\u00e9s \u00e9s energiatermel\u00e9s biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben.<\/strong>\r\n\r\nA fotovoltaikus er\u0151m\u0171 tervez\u00e9sekor fontos figyelembe venni a t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi eszk\u00f6z\u00f6k (SPD) be\u00e9p\u00edt\u00e9s\u00e9t. A t\u00falfesz\u00fclts\u00e9gek \u00e9s h\u00e1l\u00f3zati zavarok le\u00e1ll\u00e1shoz vezethetnek, ami cs\u00f6kkenti az \u00fczem teljes\u00edtm\u00e9ny\u00e9t. Ez\u00e9rt az energiatermel\u00e9st \u00e9s -eloszt\u00e1st befoly\u00e1sol\u00f3 minden k\u00f6r\u00fclm\u00e9nyt figyelembe kell venni az elektromos telep\u00edt\u00e9s tervez\u00e9sekor.\r\n\r\nMi\u00e9rt az SPD-k a legfontosabb priorit\u00e1sok a fotovillamos er\u0151m\u0171vekben?<\/strong>\r\n\r\nSolar panels are installed outside to convert solar energy into electricity. This outdoor location makes them directly exposed to harsh conditions like rain, wind and dust. Among the weather conditions lightning strikes require specific attention as they can severely affect the safety and performance of a PV plant. They originate in a cumulonimbus cloud and terminate on the ground. When the lightning strike hits the ground, it discharges energy, affecting the electrical field on the ground. For the solar PV plant this poses two risks:\r\n\r\nA direct impact which can physically destroy the solar equipment on a rooftop\r\n\r\nTransitory over voltages passing through cables by magnetic coupling, which can lead to the damage of sensitive components such as printed circuit boards (PCB).\r\n\r\nAs far as the direct impact is concerned, \u2018External Lightning Protects\u2019 (ELP) provide the required protection according to IEC 62305, which describes how to evaluate if your location needs such protection, and what should be the preferred option (meshed cages, air terminal, etc.). The concept is simple: make sure the lightning will strike a metallic rod installed on the highest point of your plant and dispel the energy directly to the ground through a copper down conductor.\r\n\r\nWhen it comes to transitory over voltages, however, SPDs are required. They are installed in parallel into the circuit protection boards to divert the energy to the ground and limit the overvoltage up to such value acceptable to the end equipment.\r\n\r\nAs soon as ELP is installed at a PV plant, it is mandatory that an SPD be installed, too. If the PV plant is not equipped with an ELP, the installation of an SPD is highly recommended to limit network perturbations (transient over voltages).\r\n\r\nHogyan m\u0171k\u00f6dik az SPD a napelemek egyen\u00e1ram\u00fa oldal\u00e1nak v\u00e9delm\u00e9ben?<\/strong>\r\n\r\nAnnak biztos\u00edt\u00e1s\u00e1ra, hogy az energia el\u0151sz\u00f6r a f\u00f6ldbe \u00e1ramoljon a t\u00falfesz\u00fclts\u00e9g korl\u00e1toz\u00e1sa \u00e9rdek\u00e9ben, a legfontosabb alkatr\u00e9sz a f\u00e9moxid-varisztor (MOV, \u2018Varistor\u2019 a VARI-able resi-STOR r\u00f6vid\u00edt\u00e9se). Ez az alkatr\u00e9sz olyan tulajdons\u00e1gokkal rendelkezik, hogy norm\u00e1l k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt (t\u00falfesz\u00fclts\u00e9g n\u00e9lk\u00fcl) az ellen\u00e1ll\u00e1s el\u00e9g nagy ahhoz, hogy ne engedje \u00e1t a n\u00e9vleges \u00e1ramot. Egy bizonyos t\u00falfesz\u00fclts\u00e9g szintt\u0151l kezd\u0151d\u0151en az ellen\u00e1ll\u00e1s gyorsan leesik, megnyitja az utat a talaj fel\u00e9, \u00e9s egyszer visszat\u00e9r a norm\u00e1l \u00e1llapotbaaz energia eloszlott. Ez a folyamat lehet\u0151v\u00e9 teszi a t\u00falfesz\u00fclts\u00e9g korl\u00e1toz\u00e1s\u00e1t az \u00f6sszes lefel\u00e9 csatlakoztatott berendez\u00e9s sz\u00e1m\u00e1ra.\r\n\r\n\"\"\r\n\r\n1+2 t\u00edpus\u00fa SPD a standard 2. t\u00edpus\u00fa SPD-vel szemben, melyik a megfelel\u0151?<\/strong>\r\n\r\nThere are different types of SPDs available which vary in terms of resistance: Type 1, Type 2, and Type 1+2. A Type 1 SPD can cope with a direct strike which bring an energetic surge, whereas a Type 2 limits over voltages from various sources. Both characteristics can be combined into a \u201cType 1+2\u201d for complete protection.\r\n\r\nIn PV plants the challenge is to choose the appropriate surge protection to withstand pure energy 10\/350\u00b5s waveform currents (almost 10 times more powerful than type 2 8\/20 \u00b5s waveform) while at the same time taking space into consideration. In an inverter or junction box space always is top priority. Britec\u2019s BRPV series provides both Type 1+2 and Type 2 DC surge protection can protect against over voltages due to lightning strikes or network surge current.\r\n\r\n\"\"\"\"\"\"","protected":false},"featured_media":779,"parent":0,"menu_order":184,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-750","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"At PV plants, SPDs have to fulfill specific requirements to ensure continuous operation and energy generation.","txt":"At PV plants, SPDs have to fulfill specific requirements to ensure continuous operation and energy generation.<\/strong>\r\n\r\nWhen designing a PV plant, it is important to consider the installation of surge protection devices (SPDs). Surges and network disturbances can lead to downtime, reducing the performance of the plant. Therefore, any conditions affecting energy generation and distribution should be taken into consideration when designing the electrical installation.\r\n\r\nWhy are SPDs a top priority in PV plants?<\/strong>\r\n\r\nSolar panels are installed outside to convert solar energy into electricity. This outdoor location makes them directly exposed to harsh conditions like rain, wind and dust. Among the weather conditions lightning strikes require specific attention as they can severely affect the safety and performance of a PV plant. They originate in a cumulonimbus cloud and terminate on the ground. When the lightning strike hits the ground, it discharges energy, affecting the electrical field on the ground. For the solar PV plant this poses two risks:\r\n\r\nA direct impact which can physically destroy the solar equipment on a rooftop\r\n\r\nTransitory over voltages passing through cables by magnetic coupling, which can lead to the damage of sensitive components such as printed circuit boards (PCB).\r\n\r\nAs far as the direct impact is concerned, \u2018External Lightning Protects\u2019 (ELP) provide the required protection according to IEC 62305, which describes how to evaluate if your location needs such protection, and what should be the preferred option (meshed cages, air terminal, etc.). The concept is simple: make sure the lightning will strike a metallic rod installed on the highest point of your plant and dispel the energy directly to the ground through a copper down conductor.\r\n\r\nWhen it comes to transitory over voltages, however, SPDs are required. They are installed in parallel into the circuit protection boards to divert the energy to the ground and limit the overvoltage up to such value acceptable to the end equipment.\r\n\r\nAs soon as ELP is installed at a PV plant, it is mandatory that an SPD be installed, too. If the PV plant is not equipped with an ELP, the installation of an SPD is highly recommended to limit network perturbations (transient over voltages).\r\n\r\nHow does an SPD work to protect the DC side of solar plants?<\/strong>\r\n\r\nTo guarantee the energy will flow to the ground first to limit over voltages the most important component is the Metal Oxide Varistor (MOV, \u2018Varistor\u2019 stands for VARI-able resi-STOR). This component has such propriety that in normal conditions (no over voltages) the resistance is high enough to not make possible nominal currents passing through it. Starting at a certain overvoltage level, the resistance will quickly drop, opening the path to the ground and coming back to a normal condition once the energy has been dissipated. This process allows limitation of the overvoltage level reaching all equipment connected downstream.\r\n\r\n\"\"\r\n\r\nType1+2 SPD versus standard Type 2 SPD, which one is the right one?<\/strong>\r\n\r\nThere are different types of SPDs available which vary in terms of resistance: Type 1, Type 2, and Type 1+2. A Type 1 SPD can cope with a direct strike which bring an energetic surge, whereas a Type 2 limits over voltages from various sources. Both characteristics can be combined into a \u201cType 1+2\u201d for complete protection.\r\n\r\nIn PV plants the challenge is to choose the appropriate surge protection to withstand pure energy 10\/350\u00b5s waveform currents (almost 10 times more powerful than type 2 8\/20 \u00b5s waveform) while at the same time taking space into consideration. In an inverter or junction box space always is top priority. Britec\u2019s BRPV series provides both Type 1+2 and Type 2 DC surge protection can protect against over voltages due to lightning strikes or network surge current.\r\n\r\n\"\"\"\"\"\""},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/blog\/750","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/media\/779"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/media?parent=750"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/blog_category?post=750"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}