{"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\/nl\/blog\/lightning-protection-of-low-voltage-power-distribution-system-in-buildings\/","title":{"rendered":"Bliksembeveiliging van laagspanningsstroomverdeelsystemen in gebouwen"},"content":{"rendered":"Bliksemrampen omvatten voornamelijk directe blikseminslagen, elektrostatische inductie van bliksem en elektromagnetische bliksempulsen.\r\n\r\n<strong>Directe blikseminslag<\/strong>\r\n\r\nDirecte blikseminslag verwijst naar het fysieke fenomeen dat de onweerswolk rechtstreeks op de grond ontlaadt. Als de grond rechtstreeks door bliksem wordt getroffen, zal er ter plaatse van de blikseminslag een grote momentane stroom ontstaan. Als de bliksemstroom niet op tijd kan worden vrijgegeven, zal het door de bliksem getroffen object onmiddellijk veel warmte genereren, waardoor het object uitzet, smelt, verbrandt, explodeert en andere schade aanricht. Normaal gesproken moeten gebouwen rekening houden met de gevaren vandirecte blikseminslag.\r\n\r\n<strong>Blikseminslag elektrostatische inductie<\/strong>\r\n\r\nBlikseminductie betekent dat wanneer een geladen onweerswolk aan de hemel verschijnt, metalen lijnen, metalen voorwerpen, enz. onder de onweerswolk door elektrostatische inductie een elektrische lading aannemen die tegengesteld is aan die van een onweerswolk. Wanneer er een blikseminslag plaatsvindt, verdwijnt de lading van de onweerswolk snel door de blikseminslag. De ge\u00efnduceerde lading op de metalen lijn plant zich voort langs de lijn, waardoor tijdelijke overspanning ontstaat bij de lijnpoort van het apparaat. Als de ge\u00efnduceerde lading op het metalen voorwerp ontstaatniet op tijd kan verdwijnen, zal er een extern ontladingsverschijnsel optreden, dat een vonk zal vormen.\r\n\r\n<strong>Bliksem elektromagnetische puls<\/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>Basismaatregelen voor bliksembeveiliging<\/strong>\r\n\r\nVoor laagspanningsstroomdistributiesystemen zijn de meest gebruikte afleidermodellen en parameters als volgt:\r\n\r\n<strong>Klasse I driefasige stroom-SPD (voor TN-S-systeem)<\/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>Klasse I driefasige stroom-SPD (voor TN-C-systeem)<\/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>Klasse I driefasige stroom-SPD (voor TT-systeem)<\/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>Klasse II driefasige stroom-SPD (voor TN-S- of TN-C-S-systemen)<\/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>Klasse II driefasige stroom-SPD (voor TT-systeem)<\/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>De bliksembeveiliging van het laagspanningsstroomverdeelsysteem is als volgt:<\/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\/nl\/wp-json\/wp\/v2\/blog\/844","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/nl\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/nl\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/nl\/wp-json\/wp\/v2\/media\/845"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/nl\/wp-json\/wp\/v2\/media?parent=844"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/nl\/wp-json\/wp\/v2\/blog_category?post=844"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}