{"id":844,"date":"2023-12-18T15:08:31","date_gmt":"2023-12-18T07:08:31","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&#038;p=844"},"modified":"2024-09-05T16:32:04","modified_gmt":"2024-09-05T08:32:04","slug":"lightning-protection-of-low-voltage-power-distribution-system-in-buildings","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/tr\/blog\/lightning-protection-of-low-voltage-power-distribution-system-in-buildings\/","title":{"rendered":"Binalardaki al\u00e7ak gerilim enerji da\u011f\u0131t\u0131m sisteminin y\u0131ld\u0131r\u0131mdan korunmas\u0131"},"content":{"rendered":"Y\u0131ld\u0131r\u0131m felaketleri temel olarak do\u011frudan y\u0131ld\u0131r\u0131m \u00e7arpmas\u0131n\u0131, y\u0131ld\u0131r\u0131m elektrostatik ind\u00fcksiyonunu ve y\u0131ld\u0131r\u0131m elektromanyetik darbelerini i\u00e7erir.\r\n\r\n<strong>Do\u011frudan y\u0131ld\u0131r\u0131m \u00e7arpmas\u0131<\/strong>\r\n\r\nDo\u011frudan y\u0131ld\u0131r\u0131m \u00e7arpmas\u0131, g\u00f6k g\u00fcr\u00fclt\u00fcs\u00fcn\u00fcn do\u011frudan yere bo\u015faltt\u0131\u011f\u0131 fiziksel olguyu ifade eder. Y\u0131ld\u0131r\u0131m\u0131n yere do\u011frudan \u00e7arpmas\u0131 durumunda, y\u0131ld\u0131r\u0131m\u0131n d\u00fc\u015ft\u00fc\u011f\u00fc yerde b\u00fcy\u00fck bir anl\u0131k ak\u0131m olu\u015facakt\u0131r. Y\u0131ld\u0131r\u0131m ak\u0131m\u0131 zaman\u0131nda serbest b\u0131rak\u0131lamazsa, y\u0131ld\u0131r\u0131m\u0131n \u00e7arpt\u0131\u011f\u0131 nesne an\u0131nda \u00e7ok fazla \u0131s\u0131 \u00fcreterek nesnenin geni\u015flemesine, erimesine, yanmas\u0131na, patlamas\u0131na ve di\u011fer hasarlara neden olur. Tipik olarak binalar a\u015fa\u011f\u0131daki tehlikeleri dikkate almal\u0131d\u0131r:do\u011frudan y\u0131ld\u0131r\u0131m d\u00fc\u015fmesi.\r\n\r\n<strong>Y\u0131ld\u0131r\u0131m elektrostatik ind\u00fcksiyon<\/strong>\r\n\r\nY\u0131ld\u0131r\u0131m ind\u00fcksiyonu, g\u00f6ky\u00fcz\u00fcnde y\u00fckl\u00fc bir f\u0131rt\u0131na bulutu g\u00f6r\u00fcnd\u00fc\u011f\u00fcnde, f\u0131rt\u0131na bulutunun alt\u0131ndaki metal hatlar\u0131n, metal nesnelerin vb. elektrostatik ind\u00fcksiyon yoluyla f\u0131rt\u0131na bulutununkine z\u0131t bir elektrik y\u00fck\u00fc almas\u0131 anlam\u0131na gelir. Bir y\u0131ld\u0131r\u0131m \u00e7arpmas\u0131 meydana geldi\u011finde, f\u0131rt\u0131na bulutu y\u00fck\u00fc, y\u0131ld\u0131r\u0131m \u00e7arpmas\u0131 yoluyla h\u0131zla kaybolur. Metal hat \u00fczerinde ind\u00fcklenen y\u00fck hat boyunca yay\u0131larak cihaz\u0131n hat portunda ge\u00e7ici a\u015f\u0131r\u0131 gerilime neden olur. Metal nesne \u00fczerinde ind\u00fcklenen y\u00fckzamanla yok olamazsa, bir k\u0131v\u0131lc\u0131m olu\u015fturacak harici bir bo\u015falma olgusu olacakt\u0131r.\r\n\r\n<strong>Y\u0131ld\u0131r\u0131m elektromanyetik darbe<\/strong>\r\n\r\nLightning electromagnetic pulse refers to the instantaneous formation of a lightning electromagnetic field in the area where the lightning strike occurs due to the extremely large peak value and speed of the lightning current. Under the action of the changing lightning electromagnetic field, metal lines in the area induce instantaneous lightning current. If the lightning current penetrates into the power supply line and communication line, transient overvoltage may occur on the device\u2019s line port.\r\n\r\nLightning protection of low-voltage power distribution system is to prevent the low-voltage power distribution system from introducing lightning current from lines outside the building.\r\n\r\n<strong>Temel y\u0131ld\u0131r\u0131mdan korunma \u00f6nlemleri<\/strong>\r\n\r\nAl\u00e7ak gerilim enerji da\u011f\u0131t\u0131m sistemlerinde yayg\u0131n olarak kullan\u0131lan arest\u00f6r modelleri ve parametreleri a\u015fa\u011f\u0131daki gibidir:\r\n\r\n<strong>S\u0131n\u0131f I \u00fc\u00e7 fazl\u0131 g\u00fc\u00e7 SPD'si (TN-S sistemi i\u00e7in)<\/strong>\r\n\r\nModel: BR-25GR 4P\r\n\r\nMax. continuous operating voltage: 275V~\r\n\r\nLightning impulse current: 25kA (10\/350\u03bcs)\r\n\r\nNominal discharge current: 25kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 100kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the main power distribution cabinet, as the first-level lightning protection of the power line.\r\n\r\n<strong>S\u0131n\u0131f I \u00fc\u00e7 fazl\u0131 g\u00fc\u00e7 SPD'si (TN-C sistemi i\u00e7in)<\/strong>\r\n\r\nModel: BR-25GR 3P\r\n\r\nMax. continuous operating voltage: 275V~\r\n\r\nLightning impulse current: 25kA (10\/350\u03bcs)\r\n\r\nNominal discharge current: 25kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 100kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the main power distribution cabinet, as the first-level lightning protection of the power line.\r\n\r\n<strong>S\u0131n\u0131f I \u00fc\u00e7 fazl\u0131 g\u00fc\u00e7 SPD'si (TT sistemi i\u00e7in)<\/strong>\r\n\r\nModel: BR-25GR 3P+NPE\r\n\r\nMax. Continuous operating voltage: 275V~\r\n\r\nLightning impulse current: 25Ka\/50kA (10\/350\u03bcs)\r\n\r\nNominal discharge current: 25kA\/50kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 100kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the main power distribution cabinet, as the first-level lightning protection of the power line.\r\n\r\n<strong>S\u0131n\u0131f II \u00fc\u00e7 fazl\u0131 g\u00fc\u00e7 SPD'si (TN-S veya TN-C-S sistemleri i\u00e7in)<\/strong>\r\n\r\nModel: BR-40 4P\r\n\r\nMax. continuous operating voltage: 275V~\r\n\r\nNominal discharge current: 20kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 40kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the sub-power distribution box, as the second-level lightning protection of the power line.\r\n\r\n<strong>S\u0131n\u0131f II \u00fc\u00e7 fazl\u0131 g\u00fc\u00e7 SPD'si (TT sistemi i\u00e7in)<\/strong>\r\n\r\nModel: BR-40 3P+NPE\r\n\r\nMax. continuous operating voltage: 275V~\r\n\r\nNominal discharge current: 20kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 40kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the sub-power distribution box, as the second-level lightning protection of the power line.\r\n\r\n<strong>Al\u00e7ak gerilim g\u00fc\u00e7 da\u011f\u0131t\u0131m sisteminin y\u0131ld\u0131r\u0131mdan korunmas\u0131 a\u015fa\u011f\u0131daki gibidir:<\/strong>\r\n\r\nThe main power distribution cabinet of the building is installed with a Class I power SPD as the first-level lightning protection of the power line.\r\n\r\nThe secondary power distribution cabinet (box) of the building is installed with a Class II power SPD as the second-level lightning protection of the power line.\r\n\r\nThe tertiary power distribution cabinet (box) of the building is installed with a Class II power SPD as the third-level lightning protection of the power line.\r\n\r\nFor important equipment ports, install Class III power SPD as terminal-level lightning protection for power lines.","protected":false},"featured_media":845,"parent":0,"menu_order":155,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-844","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"Lightning disasters mainly include direct lightning strikes, lightning electrostatic induction, and lightning electromagnetic pulses.","txt":"Lightning disasters mainly include direct lightning strikes, lightning electrostatic induction, and lightning electromagnetic pulses.\r\n\r\n<strong>Direct lightning strike<\/strong>\r\n\r\nDirect lightning strike refers to the physical phenomenon that the thundercloud discharges directly to the ground. If the ground is directly struck by lightning, a large instantaneous current will be generated at the location of the lightning strike. If the lightning current cannot be released in time, the object struck by the lightning will generate a lot of heat instantly, causing the object to expand, melt, burn, explode and other damage. Typically, buildings must consider the hazards of direct lightning strikes.\r\n\r\n<strong>Lightning electrostatic induction<\/strong>\r\n\r\nLightning induction means that when a charged thundercloud appears in the sky, metal lines, metal objects, etc. under the thundercloud to take on an electric charge opposite to that of a thundercloud by electrostatic induction. When a lightning strike occurs, the thundercloud charge quickly disappears through the lightning strike. The induced charge on the metal line propagates along the line, causing transient overvoltage at the line port of the device. If the induced charge on the metal object cannot disappear in time, there will be an external discharge phenomenon, which will form a spark.\r\n\r\n<strong>Lightning electromagnetic pulse<\/strong>\r\n\r\nLightning electromagnetic pulse refers to the instantaneous formation of a lightning electromagnetic field in the area where the lightning strike occurs due to the extremely large peak value and speed of the lightning current. Under the action of the changing lightning electromagnetic field, metal lines in the area induce instantaneous lightning current. If the lightning current penetrates into the power supply line and communication line, transient overvoltage may occur on the device\u2019s line port.\r\n\r\nLightning protection of low-voltage power distribution system is to prevent the low-voltage power distribution system from introducing lightning current from lines outside the building.\r\n\r\n<strong>Basic lightning protection measures<\/strong>\r\n\r\nFor low-voltage power distribution systems, the commonly used arrester models and parameters are as follows:\r\n\r\n<strong>Class I three-phase power SPD (for TN-S system)<\/strong>\r\n\r\nModel: BR-25GR 4P\r\n\r\nMax. continuous operating voltage: 275V~\r\n\r\nLightning impulse current: 25kA (10\/350\u03bcs)\r\n\r\nNominal discharge current: 25kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 100kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the main power distribution cabinet, as the first-level lightning protection of the power line.\r\n\r\n<strong>Class I three-phase power SPD (for TN-C system)<\/strong>\r\n\r\nModel: BR-25GR 3P\r\n\r\nMax. continuous operating voltage: 275V~\r\n\r\nLightning impulse current: 25kA (10\/350\u03bcs)\r\n\r\nNominal discharge current: 25kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 100kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the main power distribution cabinet, as the first-level lightning protection of the power line.\r\n\r\n<strong>Class I three-phase power SPD (for TT system)<\/strong>\r\n\r\nModel: BR-25GR 3P+NPE\r\n\r\nMax. Continuous operating voltage: 275V~\r\n\r\nLightning impulse current: 25Ka\/50kA (10\/350\u03bcs)\r\n\r\nNominal discharge current: 25kA\/50kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 100kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the main power distribution cabinet, as the first-level lightning protection of the power line.\r\n\r\n<strong>Class II three-phase power SPD (for TN-S or TN-C-S systems)<\/strong>\r\n\r\nModel: BR-40 4P\r\n\r\nMax. continuous operating voltage: 275V~\r\n\r\nNominal discharge current: 20kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 40kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the sub-power distribution box, as the second-level lightning protection of the power line.\r\n\r\n<strong>Class II three-phase power SPD (for TT system)<\/strong>\r\n\r\nModel: BR-40 3P+NPE\r\n\r\nMax. continuous operating voltage: 275V~\r\n\r\nNominal discharge current: 20kA (8\/20\u03bcs)\r\n\r\nMax. discharge current: 40kA (8\/20\u03bcs)\r\n\r\nMain function: installed in the sub-power distribution box, as the second-level lightning protection of the power line.\r\n\r\n<strong>The lightning protection of the low-voltage power distribution system is as follows:<\/strong>\r\n\r\nThe main power distribution cabinet of the building is installed with a Class I power SPD as the first-level lightning protection of the power line.\r\n\r\nThe secondary power distribution cabinet (box) of the building is installed with a Class II power SPD as the second-level lightning protection of the power line.\r\n\r\nThe tertiary power distribution cabinet (box) of the building is installed with a Class II power SPD as the third-level lightning protection of the power line.\r\n\r\nFor important equipment ports, install Class III power SPD as terminal-level lightning protection for power lines."},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/tr\/wp-json\/wp\/v2\/blog\/844","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/tr\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/tr\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/tr\/wp-json\/wp\/v2\/media\/845"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/tr\/wp-json\/wp\/v2\/media?parent=844"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/tr\/wp-json\/wp\/v2\/blog_category?post=844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}