{"id":992426,"date":"2025-10-22T12:53:42","date_gmt":"2025-10-22T09:53:42","guid":{"rendered":"https:\/\/testdijitalist.com\/solutions\/internal-lightning-protection-lv-spd-systems\/"},"modified":"2026-08-18T16:26:27","modified_gmt":"2026-08-18T13:26:27","slug":"internal-lightning-protection-lv-spd-systems","status":"publish","type":"page","link":"https:\/\/yilkomer.com\/en\/solutions\/internal-lightning-protection-lv-spd-systems\/","title":{"rendered":"Internal Lightning Protection (LV SPD Systems)"},"content":{"rendered":"\t\t
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Lightning does not have to strike the building itself; even a strike several kilometres away generates a surge voltage on power, data and coaxial lines high enough to destroy equipment.<\/strong> An external lightning protection system protects the structure from physical damage, but on its own it does nothing against the overvoltage travelling in along the lines. That gap is closed by the internal lightning protection system \u2014 commonly known as LV surge protection. <\/p>

In factories and plants, machinery, PLC and automation panels, security systems, sensitive boards and communication equipment are all damaged by these surges. What you see is often misleading: the device does not fail on the spot \u2014 its insulation degrades and the damage returns weeks later as a fault nobody can explain. <\/p>

Y\u0131lkomer is a global partner of RAYCAP<\/strong>. We protect power, coaxial and data lines in line with IEC 62305<\/strong>; from a product pool of more than 3,000 items, our engineering team selects, installs and documents the solution that suits your system. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The Four Building Blocks of an Internal Lightning Protection System<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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An effective internal lightning protection system is not a single device. Four elements have to work together \u2014 when one is missing, the others cannot deliver the protection you expect: <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\n\t\t\t\t<\/i>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t
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\n\t\t\t\t\t\t\n\t\t\t\t\t\t\tDefining the Lightning Protection Zones (LPZ)\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\tThe site is divided into zones according to lightning risk: it begins at the direct strike area outside (LPZ 0) and narrows step by step down to the enclosure housing the sensitive equipment (LPZ 2\u20133). At each zone boundary the energy is stepped down one level further. An SPD selected without correct zoning will not deliver the expected protection, no matter how expensive it is. \t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\n\t\t\t\t\t\t\tCascaded (Coordinated) SPD Protection\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\tNo single device can dissipate all the energy. A high-capacity SPD at the main distribution board handles its share of the lightning current, a second stage at the sub-distribution boards reduces the residual voltage, and a third stage at the equipment input performs the final filtering \u2014 all working together. If the energy coordination between stages is not set up correctly, the downstream stage operates before the upstream one and is damaged. \t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\n\t\t\t\t\t\t\tEquipotential Bonding\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\tThe job of an SPD is to divert the surge to earth, so protection cannot work unless the earthing and the equipotential bonding bar \u2014 the system's reference point \u2014 are correctly installed. Metal pipework, cable trays, enclosure bodies and the earthing of the external lightning protection system are all bonded to a common potential. \t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\n\t\t\t\t\t\t\tSignal, Data and Coaxial Line Protection\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\tMost damage enters not through the power line but through data and signal lines. RS-485 lines, Ethernet connections, 4\u201320 mA field signals, antenna feeder cables and camera lines are protected by SPDs that comply with their own standards. Protecting the power line in a facility where this side is left unguarded is like locking the door and leaving the window open. \t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Lightning does not have to strike the building. A strike kilometres away still finds its way in through power, data and signal lines. As a global partner of Raycap, we design, install and document your facility’s internal lightning protection system in accordance with TS EN \/ IEC 62305. <\/p>\n","protected":false},"author":1,"featured_media":992419,"parent":992417,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-992426","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/pages\/992426","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/comments?post=992426"}],"version-history":[{"count":1,"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/pages\/992426\/revisions"}],"predecessor-version":[{"id":992428,"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/pages\/992426\/revisions\/992428"}],"up":[{"embeddable":true,"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/pages\/992417"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/media\/992419"}],"wp:attachment":[{"href":"https:\/\/yilkomer.com\/en\/wp-json\/wp\/v2\/media?parent=992426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}