{"id":33059,"date":"2020-04-24T13:35:25","date_gmt":"2020-04-24T05:35:25","guid":{"rendered":"https:\/\/www.upowertek.com\/led-ajurin-kaynnistysvirta-ja-mcb-maara\/"},"modified":"2022-12-10T13:26:29","modified_gmt":"2022-12-10T05:26:29","slug":"led-ajurin-kaynnistysvirta-ja-mcb-maara","status":"publish","type":"post","link":"https:\/\/www.upowertek.com\/fi\/led-ajurin-kaynnistysvirta-ja-mcb-maara\/","title":{"rendered":"LED-ajurin k\u00e4ynnistysvirta ja MCB-m\u00e4\u00e4r\u00e4"},"content":{"rendered":"\n<p>Sy\u00f6tt\u00f6virta LED-valaistuksessa on yksi alue, joka on edelleen huolenaihe LED-valaistuksessa. Totuus on kuitenkin se, ett\u00e4 k\u00e4ynnistysvirtaa ei esiinny vain LEDeiss\u00e4, vaan my\u00f6s koko virtal\u00e4hdekonseptissa. On yleist\u00e4, ett\u00e4 MCB laukeaa. Katsotaanpa nyt, mit\u00e4 k\u00e4ynnistysvirta ja MCB tarkoittavat ja kuinka lasketaan MCB:hen kytkett\u00e4vien virtal\u00e4hteiden m\u00e4\u00e4r\u00e4.<\/p>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">LED-sytytysvirtalaskin<\/h2>\n\n<p>Jos haluat vain tiet\u00e4\u00e4 MCB:hen kytketyn LED-ajurin m\u00e4\u00e4r\u00e4n, voit k\u00e4ytt\u00e4\u00e4 sinulle suunnittelemaamme lomaketta, kirjoita vain sy\u00f6tt\u00f6virta, pulssin kesto ja tulovirta, valitse sitten MCB-tyyppi ja saat tuloksen.<\/p>\n\n          \n\n          <style>@media (max-width:480px){#cp_calculatedfieldsf_pform_1{min-height:2033px;}}@media (max-width:768px){#cp_calculatedfieldsf_pform_1{min-height:1067px;}}@media (max-width:1024px){#cp_calculatedfieldsf_pform_1{min-height:809px;}}@media (min-width:1024px){#cp_calculatedfieldsf_pform_1{min-height:771px;}}<\/style><form name=\"cp_calculatedfieldsf_pform_1\" id=\"cp_calculatedfieldsf_pform_1\" action=\"https:\/\/www.upowertek.com\/fi\/led-ajurin-kaynnistysvirta-ja-mcb-maara\/\" method=\"post\" enctype=\"multipart\/form-data\" onsubmit=\"return fbuilderjQuery.fbuilder.doValidate(this);\" class=\"cff-form no-prefetch  cff-form-6 cp_cff_letter\"  data-nonce=\"58fcab4675\">\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_pform_psequence\" value=\"_1\" \/>\n<input type=\"hidden\" name=\"cp_calculatedfieldsf_id\" value=\"6\" \/>\n<input type=\"hidden\" name=\"cp_ref_page\" value=\"https:\/\/www.upowertek.com\" \/>\n<pre style=\"display:none !important;\"><script data-category=\"functional\" type=\"text\/javascript\">form_structure_1=[[{\"form_identifier\":\"\",\"name\":\"fieldname2\",\"shortlabel\":\"\",\"index\":0,\"ftype\":\"fnumber\",\"userhelp\":\"Get this data from the LED driver or lamp datasheet\",\"audiotutorial\":\"\",\"userhelpTooltip\":true,\"tooltipIcon\":false,\"csslayout\":\"\",\"title\":\"Max. Inrush current (A)\",\"predefined\":\"\",\"predefinedClick\":false,\"required\":true,\"exclude\":false,\"readonly\":false,\"numberpad\":false,\"spinner\":false,\"size\":\"small\",\"thousandSeparator\":\"\",\"decimalSymbol\":\".\",\"min\":\"\",\"max\":\"\",\"formatDynamically\":false,\"dformat\":\"number\",\"formats\":[\"digits\",\"number\",\"percent\"],\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"fieldname3\",\"shortlabel\":\"\",\"index\":1,\"ftype\":\"fnumber\",\"userhelp\":\"50% peak, can be found in the LED driver datasheet, please convert it to T50 if it's T10 showed in the datasheet.\",\"audiotutorial\":\"\",\"userhelpTooltip\":true,\"tooltipIcon\":false,\"csslayout\":\"\",\"title\":\"Pulse Duration T50 (us)\",\"predefined\":\"\",\"predefinedClick\":false,\"required\":true,\"exclude\":false,\"readonly\":false,\"numberpad\":false,\"spinner\":false,\"size\":\"small\",\"thousandSeparator\":\"\",\"decimalSymbol\":\".\",\"min\":\"30\",\"max\":\"2000\",\"formatDynamically\":false,\"dformat\":\"number\",\"formats\":[\"digits\",\"number\",\"percent\"],\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"fieldname4\",\"shortlabel\":\"\",\"index\":2,\"ftype\":\"fnumber\",\"userhelp\":\"Use the output power of the LED driver to divide efficiency firstly to get the input power, then divide input voltage 230Vac to get the input current\",\"audiotutorial\":\"\",\"userhelpTooltip\":true,\"tooltipIcon\":false,\"csslayout\":\"\",\"title\":\"Input Current 230Vac (A)\",\"predefined\":\"\",\"predefinedClick\":false,\"required\":true,\"exclude\":false,\"readonly\":false,\"numberpad\":false,\"spinner\":false,\"size\":\"small\",\"thousandSeparator\":\"\",\"decimalSymbol\":\".\",\"min\":\"\",\"max\":\"\",\"formatDynamically\":false,\"dformat\":\"number\",\"formats\":[\"digits\",\"number\",\"percent\"],\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"fieldname6\",\"shortlabel\":\"\",\"index\":3,\"ftype\":\"fdropdown\",\"userhelp\":\"\",\"audiotutorial\":\"\",\"userhelpTooltip\":false,\"tooltipIcon\":false,\"csslayout\":\"\",\"title\":\"MCB Type\",\"size\":\"small\",\"required\":true,\"exclude\":false,\"toSubmit\":\"text\",\"merge\":0,\"choiceSelected\":\"\",\"select2\":false,\"multiple\":false,\"vChoices\":1,\"showDep\":false,\"choices\":[\"B\",\"C\",\"D\"],\"optgroup\":[false,false,false],\"choicesVal\":[\"3\",\"5\",\"10\"],\"choicesDep\":[[],[],[]],\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"fieldname7\",\"shortlabel\":\"\",\"index\":4,\"ftype\":\"fdropdown\",\"userhelp\":\"\",\"audiotutorial\":\"\",\"userhelpTooltip\":false,\"tooltipIcon\":false,\"csslayout\":\"\",\"title\":\"MCB Rated Current\",\"size\":\"small\",\"required\":true,\"exclude\":false,\"toSubmit\":\"text\",\"merge\":0,\"choiceSelected\":\"\",\"select2\":false,\"multiple\":false,\"vChoices\":1,\"showDep\":false,\"choices\":[\"10A\",\"16A\",\"25A\",\"32A\"],\"optgroup\":[false,false,false,false],\"choicesVal\":[\"10\",\"16\",\"25\",\"32\"],\"choicesDep\":[[],[],[],[]],\"fBuild\":{},\"parent\":\"\"},{\"dependencies\":[{\"rule\":\"\",\"complex\":false,\"fields\":[\"\"]}],\"form_identifier\":\"\",\"name\":\"fieldname1\",\"shortlabel\":\"\",\"index\":5,\"ftype\":\"fCalculated\",\"userhelp\":\"It's calculated based on the pulse duaration you input. The proof factor K can also be found in the MCB datasheet.\",\"audiotutorial\":\"\",\"userhelpTooltip\":true,\"tooltipIcon\":false,\"csslayout\":\"\",\"title\":\"Proof Factor K\",\"predefined\":\"\",\"required\":false,\"exclude\":false,\"size\":\"small\",\"eq\":\"2.446\\\/pow(fieldname3\\\/1000,1.0582)\\n\",\"min\":\"1\",\"max\":\"100\",\"suffix\":\"\",\"prefix\":\"\",\"decimalsymbol\":\".\",\"groupingsymbol\":\"\",\"readonly\":true,\"currency\":false,\"noEvalIfManual\":true,\"formatDynamically\":false,\"hidefield\":false,\"fBuild\":{},\"parent\":\"\"},{\"form_identifier\":\"\",\"name\":\"separator1\",\"shortlabel\":\"\",\"index\":6,\"ftype\":\"fSectionBreak\",\"userhelp\":\"\",\"audiotutorial\":\"\",\"userhelpTooltip\":false,\"tooltipIcon\":false,\"csslayout\":\"\",\"title\":\"The field below will show the quantity of LED drivers can be connected to one MCB\",\"fBuild\":{},\"parent\":\"\"},{\"dependencies\":[{\"rule\":\"\",\"complex\":false,\"fields\":[\"\"]}],\"form_identifier\":\"\",\"name\":\"fieldname5\",\"shortlabel\":\"\",\"index\":7,\"ftype\":\"fCalculated\",\"userhelp\":\"These calculated values are based on MCB S200 series manufactured by ABB. It's better to have at least 80% margin by multiply the result with 0.8\",\"audiotutorial\":\"\",\"userhelpTooltip\":false,\"tooltipIcon\":false,\"csslayout\":\"\",\"title\":\"LED Driver Quantity\",\"predefined\":\"\",\"required\":false,\"exclude\":false,\"size\":\"small\",\"eq\":\"floor(min(fieldname1*fieldname6*fieldname7\\\/fieldname2, fieldname7\\\/fieldname4))\",\"min\":\"\",\"max\":\"\",\"suffix\":\"\",\"prefix\":\"\",\"decimalsymbol\":\".\",\"groupingsymbol\":\"\",\"readonly\":true,\"currency\":false,\"noEvalIfManual\":true,\"formatDynamically\":false,\"hidefield\":false,\"fBuild\":{},\"parent\":\"\"}],{\"0\":{\"title\":\"Inrush Current Calculator\",\"description\":\"Calculate how many LED drivers can be connected to a MCB\",\"formlayout\":\"left_aligned\",\"formtemplate\":\"cp_cff_letter\",\"evalequations\":1,\"evalequationsevent\":2,\"loading_animation\":0,\"autocomplete\":1,\"persistence\":0,\"animate_form\":0,\"customstyles\":\"\"},\"formid\":\"cp_calculatedfieldsf_pform_1\"}];<\/script><\/pre>\n<div id=\"fbuilder\">\n\t\t<div id=\"fbuilder_1\">\n\t\t<div id=\"formheader_1\"><\/div>\n\t\t<div id=\"fieldlist_1\"><\/div>\n\t\t<div class=\"clearer\"><\/div>\n\t<\/div>\n<\/div>\n\t<div id=\"cp_subbtn_1\" class=\"cp_subbtn\" style=\"display:none;\"><\/div><div class=\"clearer\"><\/div>\n\t<input type=\"hidden\" id=\"_cpcff_public_nonce\" name=\"_cpcff_public_nonce\" value=\"6cc6b682a4\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/fi\/wp-json\/wp\/v2\/posts\/33059\" \/><\/form>\n\t\n          \n\n        \n\n<p>Jatka lukemista, jos haluat tiet\u00e4\u00e4 kuinka numero on saatu.<\/p>\n\n<div style=\"height:46px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Mik\u00e4 on LED-ajurin sy\u00f6tt\u00f6virta<\/h2>\n\n<p>\n          <strong>LED-ajurin k\u00e4ynnistysvirta on suurin hetkellinen tulovirta (lyhytkestoinen), joka virtaa LED-ohjaimeen virransy\u00f6t\u00f6n kytkemisen yhteydess\u00e4. <\/strong>\n        <\/p>\n\n<p>Sy\u00f6tt\u00f6virtaa kutsutaan muilla nimill\u00e4, kuten p\u00e4\u00e4llekytkent\u00e4j\u00e4nnite ja sis\u00e4\u00e4ntuloj\u00e4nnite. Ei ole mik\u00e4\u00e4n uutinen, ett\u00e4 LED-ajurit kokevat korkeita sy\u00f6tt\u00f6virtoja, jotka ylitt\u00e4v\u00e4t jopa 100-kertaisen nimellisvirran.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"568\" height=\"291\" src=\"http:\/\/upowertek.com\/wp-content\/uploads\/2020\/04\/inrush.png\" alt=\"\" class=\"wp-image-6033\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/inrush.png 568w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/inrush-300x154.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/inrush-400x205.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/inrush-450x231.png 450w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/inrush-367x188.png 367w\" sizes=\"(max-width: 568px) 100vw, 568px\" \/><figcaption class=\"wp-element-caption\">Sy\u00f6tt\u00f6virta<\/figcaption><\/figure>\n\n<div class=\"wp-block-columns has-background is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\" style=\"background-color:#f6f6f6\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"404\" height=\"580\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB.png\" alt=\"k&#xE4;ynnistysvirta ja mcb\" class=\"wp-image-10540\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB.png 404w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB-209x300.png 209w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB-400x574.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB-367x527.png 367w\" sizes=\"(max-width: 404px) 100vw, 404px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-align-center has-large-font-size\"><strong>Lataa <strong>PDF<\/strong><\/strong> <strong>&#8211;<\/strong> tiedosto <\/p>\n\n\n\n<p class=\"has-text-align-left\"> Ajan s\u00e4\u00e4st\u00e4miseksi olemme laatineet my\u00f6s PDF-version, joka sis\u00e4lt\u00e4\u00e4 kaiken t\u00e4m\u00e4n sivun sis\u00e4ll\u00f6n, j\u00e4t\u00e4 vain s\u00e4hk\u00f6postiosoitteesi, niin saat e-kirjan heti. <strong> <\/strong><\/p>\n\n\n\n          \n\n          <div class=\"ml-embedded\" data-form=\"9gzBcu\"><\/div>\n          \n\n        \n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Mik\u00e4 aiheuttaa sy\u00f6tt\u00f6virran LED-ajureissa?<\/h2>\n\n<p>K\u00e4ynnistysvirtaa esiintyy kaikissa laitteissa, jotka saavat vaihtovirtaa virtal\u00e4hteest\u00e4, kuten muuntajassa, s\u00e4hk\u00f6moottoreissa, LED-ajureissa jne.<\/p>\n\n<p>LED-ajureissa on kondensaattoreita, jotka tuottavat minimaalisen latauksen vakiomittakaavassa virtal\u00e4hteen kanssa. T\u00e4m\u00e4n seurauksena LED-ajurit vaativat suuren alkuvirran kondensaattorin lataamiseen, mik\u00e4 johtaa k\u00e4ynnistysvirtaan. Lis\u00e4ksi aika, joka kuluu tulovirralla kondensaattorin lataamiseen, on eritt\u00e4in nopea, mik\u00e4 aiheuttaa p\u00e4\u00e4llekytkent\u00e4piikin.<\/p>\n\n<p>Otetaan selke\u00e4mpi kuva k\u00e4ytt\u00e4m\u00e4ll\u00e4 <em>alla olevaa nykyisen ajan kaaviota.m kaavio<\/em> , <\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"592\" height=\"266\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/current-time-graph.png\" alt=\"nykyinen aikakaavio\" class=\"wp-image-10476\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/current-time-graph.png 592w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/current-time-graph-300x135.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/current-time-graph-400x180.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/current-time-graph-367x165.png 367w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><\/figure>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>n\u00e4emme, ett\u00e4 kest\u00e4\u00e4 muutaman millisekunnin, ennen kuin tulovirta saavuttaa vakaan tilan. Mutta johtuen kondensaattorin latausnopeudesta tulovirralla, virta kasvaa huippuvirtaan (merkitty 6A:lla). Sitten hetken kuluttua virta laskee tasavirtaan (merkitty 5A). Siten lyhyell\u00e4 aikaerolla oleva virta on k\u00e4ynnistysvirtaa. <\/p>\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Sy\u00f6tt\u00f6virran merkitys ja tunnistaminen<\/h2>\n\n<p>Kysymys, joka voisi py\u00f6ri\u00e4 mieless\u00e4si, voisi olla; miksi puhumme syttymisvirroista? Tai miksi se on niin huolestuttava valaistusteollisuudessa? Jotta voimme tarjota vastauksia, haluamme n\u00e4hd\u00e4 sys\u00e4ysvirtojen merkityksen LED-ajureissa.<\/p>\n\n<p>Sy\u00f6tt\u00f6virran vaikutukset LED-ajureihin eiv\u00e4t ole houkuttelevia. Ratatietojen mukaan sy\u00f6tt\u00f6virrat ovat enemm\u00e4n haittaa kuin LED-j\u00e4rjestelm\u00e4n liittolainen. Koska k\u00e4ynnistysvirran suhde tasavirtaan on korkea, seurauksena on ylij\u00e4nnite, joka aiheuttaa seuraavan:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Virtakytkimen laukeaminen<\/li>\n\n\n\n<li>Palaneet sulakkeet<\/li>\n\n\n\n<li>Katkaisijan vaurioituminen<\/li>\n\n\n\n<li>Valon himmennysj\u00e4rjestelm\u00e4n vika<\/li>\n\n\n\n<li>Hitsausreleen koskettimet<\/li>\n<\/ul>\n\n<p>Sy\u00f6tt\u00f6virta aiheuttaa kaiken kaikkiaan suuren vaaran LED-ajureille, koska se voi vahingoittaa kuljettajaa ja heikent\u00e4\u00e4 tehokkuutta.<\/p>\n\n<p>T\u00e4m\u00e4n osan seuraava teht\u00e4v\u00e4 on auttaa sinua tunnistamaan sy\u00f6tt\u00f6virta. Voimme saavuttaa t\u00e4m\u00e4n saavutuksen hahmottelemalla k\u00e4ynnistysvirtojen ominaisuudet.<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Ne ovat hetkellisi\u00e4: tapahtuvat silloin, kun LED-ohjain saa virtal\u00e4hteen<\/li>\n\n\n\n<li>Virta on suurempi kuin ohjaimen nimellisvirta<\/li>\n\n\n\n<li>Tyypillisesti niiden j\u00e4nnitealue on 120\u2013240 V<\/li>\n\n\n\n<li>Kest\u00e4\u00e4 v\u00e4h\u00e4n aikaa, mutta tarpeeksi tehokas aiheuttamaan vahinkoa<\/li>\n\n\n\n<li>Se on keskiarvo puolen jakson aikana<\/li>\n<\/ul>\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Kuinka laskea k\u00e4ynnistysvirta?<\/h2>\n\n<p>Sy\u00f6tt\u00f6virtaa laskettaessa tulee ottaa huomioon tekij\u00f6it\u00e4, kuten aika (kesto), huippuvirta ja aaltomuodon muoto. Ensin muistellaan sys\u00e4ysvirtailmi\u00f6it\u00e4, joita edustamme kaaviossa. N\u00e4et, ett\u00e4 kun LED-ajuri saa virtaa, tulovirta nousee huippuvirtaan ennen kuin se palaa vakaan tilan virtaan.<\/p>\n\n<p>Yll\u00e4 oleva mekanismi synnytt\u00e4\u00e4 aaltomuodon, jonka muoto riippuu vaihtelevasta k\u00e4ynnistysvirran tasosta. N\u00e4ist\u00e4 aaltomuodoista voimme nyt laskea sy\u00f6tt\u00f6virrat. Jokaisella aaltomuodon muodolla on sopiva kaava k\u00e4ynnistysvirran laskemiseksi.<\/p>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\">\n<p> Katsotaanpa alla olevaa taulukkoa: <\/p>\n\n\n\n<p>Miss\u00e4;<\/p>\n\n\n\n<p>Ip = huippuvirta<\/p>\n\n\n\n<p>Ia = Tasainen virta<\/p>\n\n\n\n<p>t = aika<\/p>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p> Vaihtoehtoisesti voit mitata sy\u00f6tt\u00f6virtaa laitteilla, kuten digitaalisella yleismittarilla, puristinmittarilla ja virranlaadun analysaattorilla. <\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"411\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Circuit-Breaker-App-Note.webp\" alt=\"katkaisijasovelluksen huomautus\" class=\"wp-image-10514\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Circuit-Breaker-App-Note.webp 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Circuit-Breaker-App-Note-219x300.webp 219w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/figure>\n<\/div>\n<\/div>\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">LED-ajureiden sy\u00f6tt\u00f6virtoihin vaikuttavat tekij\u00e4t<\/h2>\n\n<p>Sy\u00f6tt\u00f6virtaan vaikuttavia tekij\u00f6it\u00e4 ovat sy\u00f6tt\u00f6j\u00e4nnite, l\u00e4mp\u00f6tila ja kuormitus. Katsotaan kuinka ne reagoivat sy\u00f6tt\u00f6virtoihin<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Tuloj\u00e4nnite<\/strong> : Sy\u00f6tt\u00f6virrat kasvavat, kun my\u00f6s tuloj\u00e4nnite kasvaa.<\/li>\n\n\n\n<li><strong>Sis\u00e4inen bulkkikondensaattori<\/strong> : T\u00e4m\u00e4 on t\u00e4rkein syy korkean sy\u00f6tt\u00f6virran esiintymiseen. Mit\u00e4 suurempi kapasitanssi, sit\u00e4 suurempi k\u00e4ynnistysvirran arvo.<\/li>\n\n\n\n<li><strong>L\u00e4mp\u00f6tila<\/strong> : Kun l\u00e4mp\u00f6tila on korkea, vastus pienenee, mik\u00e4 johtaa suurempaan sy\u00f6tt\u00f6virtaan. P\u00e4invastoin j\u00e4rjestelm\u00e4n alhaisemmassa l\u00e4mp\u00f6tilassa.<\/li>\n<\/ul>\n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"486\" height=\"304\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2016\/10\/150w-open-frame.png\" alt=\"avoimen kehyksen 150 W LED-ohjain\" class=\"wp-image-1377\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2016\/10\/150w-open-frame.png 486w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2016\/10\/150w-open-frame-300x188.png 300w\" sizes=\"(max-width: 486px) 100vw, 486px\" \/><figcaption class=\"wp-element-caption\">Bulkkikondensaattori LED-ohjaimessa<\/figcaption><\/figure>\n\n<h2 class=\"wp-block-heading\">Sy\u00f6tt\u00f6virran rajoittaminen LED-ajureissa<\/h2>\n\n<p>T\u00e4m\u00e4n kappaleen j\u00e4lkeen n\u00e4emme, ett\u00e4 sy\u00f6tt\u00f6virta on p\u00e4tev\u00e4 tosiasia ja aiheuttaa suuren vaaran LED-ajureille. Siksi paras askel on tutkia tapoja rajoittaa sy\u00f6tt\u00f6virtoja LED-ajurien s\u00e4ilytt\u00e4miseksi ja parantamiseksi.<\/p>\n\n<p>Mutta ennen kuin tarkastelemme rajoittavia menetelmi\u00e4, meid\u00e4n pit\u00e4isi ymm\u00e4rt\u00e4\u00e4 tekij\u00e4t, jotka auttavat m\u00e4\u00e4ritt\u00e4m\u00e4\u00e4n sopivan rajoitusmenetelm\u00e4n.<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>Kytkent\u00e4aika:<\/strong> Kun kytkent\u00e4aika on nopea, negatiivisen l\u00e4mp\u00f6tilakertoimen (NTC) menetelm\u00e4 ei sovellu. Tekniikka ei sovellu, koska NTC:ll\u00e4 ei ole aikaa j\u00e4\u00e4hty\u00e4, mik\u00e4 nostaa l\u00e4mp\u00f6tilaa ja puolestaan nostaa k\u00e4ynnistysvirtaa.<\/li>\n\n\n\n<li><strong>Kuormakapasitanssi:<\/strong> Suuren kapasitanssin j\u00e4rjestelm\u00e4 tarvitsee suuren tilap\u00e4isvirran, kun virta on p\u00e4\u00e4ll\u00e4. T\u00e4m\u00e4n seurauksena pehme\u00e4 k\u00e4ynnistyspiiri on ihanteellinen rajoittamaan k\u00e4ynnistysvirtaa.<\/li>\n\n\n\n<li><strong>Pienj\u00e4nnitematalavirtailmi\u00f6:<\/strong> tapahtuu, kun kuorma ja virtal\u00e4hde ovat samassa piiriss\u00e4. Ihanteellinen l\u00e4hestymistapa on j\u00e4nnites\u00e4\u00e4timen k\u00e4ytt\u00f6.<\/li>\n\n\n\n<li><strong>Tasaisen tilan virran arvo<\/strong> : NTC-l\u00e4hestymistapa on sopiva t\u00e4ss\u00e4 tapauksessa, koska korkea vakaan tilan virta pyrkii nostamaan l\u00e4mp\u00f6tilaa.<\/li>\n<\/ul>\n\n<p>Tehty ja p\u00f6lyttyn\u00e4 tekij\u00f6iden kanssa, on nyt aika tarkastella asianmukaisia rajoitusmenetelmi\u00e4.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"693\" height=\"446\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Inrush-Current-1.jpg\" alt=\"k&#xE4;ynnistysvirta 1\" class=\"wp-image-10512\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Inrush-Current-1.jpg 693w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Inrush-Current-1-600x386.jpg 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Inrush-Current-1-300x193.jpg 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Inrush-Current-1-640x412.jpg 640w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Inrush-Current-1-400x257.jpg 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Inrush-Current-1-367x236.jpg 367w\" sizes=\"(max-width: 693px) 100vw, 693px\" \/><\/figure>\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h3 class=\"wp-block-heading\">Negatiivisen l\u00e4mp\u00f6tilakertoimen (NTC) menetelm\u00e4<\/h3>\n\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p>NTC-l\u00e4hestymistapa kulkee my\u00f6s nimell\u00e4 termistori. Se k\u00e4ytt\u00e4\u00e4 periaatetta muuttaa vastus eri l\u00e4mp\u00f6tiloissa. Eli se tarjoaa korkean vastuksen matalissa l\u00e4mp\u00f6tiloissa ja alhaisen vastuksen korkeissa l\u00e4mp\u00f6tiloissa.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>NTC ja tulot ovat sarjassa; n\u00e4in ollen kun on virtal\u00e4hde, NTC antaa korkean vastuksen, mik\u00e4 v\u00e4hent\u00e4\u00e4 k\u00e4ynnistysvirtaa.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"579\" height=\"311\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current.png\" alt=\"k&#xE4;ynnistysvirta\" class=\"wp-image-10478\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current.png 579w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-300x161.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-400x215.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-367x197.png 367w\" sizes=\"(max-width: 579px) 100vw, 579px\" \/><\/figure>\n<\/div>\n<\/div>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h3 class=\"wp-block-heading\">Pehme\u00e4 k\u00e4ynnistyspiiri<\/h3>\n\n<p>Sit\u00e4 k\u00e4ytet\u00e4\u00e4n my\u00f6s nimell\u00e4 viivepiiri, jota esiintyy p\u00e4\u00e4asiassa j\u00e4nnites\u00e4\u00e4timiss\u00e4. Piiri tukee l\u00e4hd\u00f6n nousuajan muutosta, mik\u00e4 puolestaan pienent\u00e4\u00e4 l\u00e4ht\u00f6virtaa. Lis\u00e4ksi pehme\u00e4 k\u00e4ynnistyspiiri auttaa v\u00e4hent\u00e4m\u00e4\u00e4n k\u00e4ynnistysvirtaa.<\/p>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h3 class=\"wp-block-heading\">Pienoiskatkaisijat (MCB:t)<\/h3>\n\n<p>Pienoiskatkaisija on s\u00e4hk\u00f6magneettinen laite, joka kuljettaa t\u00e4ydellist\u00e4 valettua eristysmateriaalia. T\u00e4m\u00e4n laitteen ensisijainen teht\u00e4v\u00e4 on kytke\u00e4 piiri. Se tarkoittaa piirin automaattista avaamista (joka kytkeytyy virtaan), kun piirin l\u00e4pi kulkeva virta ylitt\u00e4\u00e4 asetetun arvon tai rajan. MCB on suunniteltu suojaamaan kaapelia laitteen j\u00e4lkeen ylikuormituksilta ja oikosuluilta, mik\u00e4 est\u00e4\u00e4 kaapelien ja laitteiden vaurioitumisen. Laite voidaan kytke\u00e4 manuaalisesti p\u00e4\u00e4lle tai pois p\u00e4\u00e4lt\u00e4, kuten tavalliset kytkimet aina tarvittaessa.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/upowertek.com\/wp-content\/uploads\/2020\/04\/MCB.jpg\" alt=\"\" class=\"wp-image-6066\" width=\"659\" height=\"428\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB.jpg 878w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-600x390.jpg 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-300x195.jpg 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-768x499.jpg 768w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-640x415.jpg 640w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-400x260.jpg 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-367x238.jpg 367w\" sizes=\"(max-width: 659px) 100vw, 659px\" \/><figcaption class=\"wp-element-caption\">C16 MCB:t<\/figcaption><\/figure>\n\n<p>Pienoiskatkaisijat laukeavat NTC:n tai termistorin rajoitusten vuoksi, jos ne eiv\u00e4t voi rajoittaa k\u00e4ynnistysvirtaa. MCB:n periaate on, ett\u00e4 se laukeaa, kun se havaitsee ylikuormituksen oikosulkuskenaarion. Siten MCB toimii esteen\u00e4, kun se laukeaa ennen kuin ylim\u00e4\u00e4r\u00e4inen energia virtaa kuljettajiin, mutta silti s\u00e4ilytt\u00e4\u00e4 valon.<\/p>\n\n<h4 class=\"wp-block-heading\">MCB:n tyypit<\/h4>\n\n<p>MCB-tyyppej\u00e4 on kolme, tyyppi B, tyyppi C ja tyyppi D, ja niiden laukaisunopeus riippuu ylikuormituksen tasosta, ja sen m\u00e4\u00e4ritt\u00e4\u00e4 yleens\u00e4 MCB:n sis\u00e4ll\u00e4 oleva l\u00e4mp\u00f6laite. Tyypillinen MCB-laukaisuk\u00e4yr\u00e4 n\u00e4ytt\u00e4\u00e4 ajan, joka tarvitaan katkaisijan laukeamiseen annetulla ylivirtatasolla, kuten alla.<\/p>\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1007\" height=\"752\" src=\"http:\/\/upowertek.com\/wp-content\/uploads\/2020\/04\/mcb.png\" alt=\"\" class=\"wp-image-6034\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/mcb.png 1007w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/mcb-600x448.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/mcb-300x224.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/mcb-768x574.png 768w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/mcb-640x478.png 640w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/mcb-400x300.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/mcb-367x274.png 367w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/mcb-200x150.png 200w\" sizes=\"(max-width: 1007px) 100vw, 1007px\" \/><\/figure>\n\n<p>N\u00e4m\u00e4 k\u00e4yr\u00e4t vaihtelevat valmistajittain ja tyypeitt\u00e4in. Tyypillisesti B-tyypin MCB-k\u00e4yr\u00e4n toiminta-alue on 3-5 In, C-tyypin 5-10In ja D-tyypin 10-14 In yleisimmin k\u00e4ytetyn ABB S201M -sarjan tietolehtien mukaan. <\/p>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h4 class=\"wp-block-heading\">\n          <strong>MCB:iden laukaisuominaisuudet<\/strong>\n        <\/h4>\n\n<p>MCB toimii laukaisemalla, kun piiri on ylikuormitettu tai kun j\u00e4rjestelm\u00e4ss\u00e4 on tapahtunut oikosulku, ja sen teho on 6A tai 10A riippuen sen k\u00e4ytt\u00f6tarkoituksesta, eli asuin-, liike-, teollisuus- tai julkisiin rakennuksiin. MCB laukeaa kahdessa tilanteessa, vakaan tilan virrassa ja hetkellisess\u00e4 virrassa, jota kutsutaan my\u00f6s k\u00e4ynnistysvirraksi.<\/p>\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1004\" height=\"615\" src=\"http:\/\/upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-5.png\" alt=\"\" class=\"wp-image-6040\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-5.png 1004w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-5-600x368.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-5-300x184.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-5-768x470.png 768w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-5-640x392.png 640w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-5-400x245.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-5-367x225.png 367w\" sizes=\"(max-width: 1004px) 100vw, 1004px\" \/><\/figure>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p>MCB:n laukaisukyky riippuu virran kestosta ja sen suuruudesta. Katsotaanpa kuvaaja, joka n\u00e4ytt\u00e4\u00e4 kunkin MCB:n ominaisuudet. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"400\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-B-type-MCB-.webp\" alt=\"laukaisuk&#xE4;yr&#xE4; b-tyypin mcb:lle \" class=\"wp-image-10515\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-B-type-MCB-.webp 500w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-B-type-MCB--300x240.webp 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-B-type-MCB--400x320.webp 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-B-type-MCB--367x294.webp 367w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><figcaption class=\"wp-element-caption\">Laukaisuk\u00e4yr\u00e4 B-tyypin MCB:lle <\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p> Sininen k\u00e4yr\u00e4 on nimellisvirta tietyn keston aikana yll\u00e4 olevista kuvista, ja laatikkoalue osoittaa hetkellisen laukaisualueen. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"400\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-C-type-MCB-.webp\" alt=\"laukaisuk&#xE4;yr&#xE4; c-tyypin mcb:lle \" class=\"wp-image-10516\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-C-type-MCB-.webp 500w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-C-type-MCB--300x240.webp 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-C-type-MCB--400x320.webp 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-C-type-MCB--367x294.webp 367w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><figcaption class=\"wp-element-caption\">Laukaisuk\u00e4yr\u00e4 C-tyypin mMCB:lle <\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\">\n<p>Siksi voimme tehd\u00e4 yhteenvedon laukaisuominaisuuksista alla olevan taulukon avulla.<\/p>\n\n\n\n<p>Se osoittaa, ett\u00e4 tyypin C MCB kest\u00e4\u00e4 kaksinkertaisen nimellisvirran 850 ms:n ajan ilman laukaisua ja kolme kertaa nimellisvirran 130 ms ilman laukaisua.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"315\" height=\"151\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/a-type-C-MCB-1.png\" alt=\"a tyyppi c mcb 1\" class=\"wp-image-10522\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/a-type-C-MCB-1.png 315w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/a-type-C-MCB-1-300x144.png 300w\" sizes=\"(max-width: 315px) 100vw, 315px\" \/><\/figure>\n\n\n\n<p><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"inherit-container-width wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-D-type-MCB-.webp\" alt=\"laukaisuk&#xE4;yr&#xE4; d-tyypin mcb:lle \" class=\"wp-image-10518\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-D-type-MCB-.webp 500w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-D-type-MCB--300x240.webp 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-D-type-MCB--400x320.webp 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/Tripping-curve-for-D-type-MCB--367x294.webp 367w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><figcaption class=\"wp-element-caption\">laukaisuk\u00e4yr\u00e4 d-tyypin mcb:lle <\/figcaption><\/figure>\n<\/div>\n<\/div>\n<\/div>\n\n<div class=\"wp-block-columns has-background is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\" style=\"background-color:#f6f6f6\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"404\" height=\"580\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB.png\" alt=\"k&#xE4;ynnistysvirta ja mcb\" class=\"wp-image-10540\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB.png 404w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB-209x300.png 209w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB-400x574.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/Inrush-current-and-MCB-367x527.png 367w\" sizes=\"(max-width: 404px) 100vw, 404px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-align-center has-large-font-size\"><strong>Haluatko lukea sen my\u00f6hemmin?<\/strong> <\/p>\n\n\n\n<p class=\"has-text-align-left\"> Ajan s\u00e4\u00e4st\u00e4miseksi olemme laatineet my\u00f6s PDF-version, joka sis\u00e4lt\u00e4\u00e4 kaiken t\u00e4m\u00e4n sivun sis\u00e4ll\u00f6n, j\u00e4t\u00e4 vain s\u00e4hk\u00f6postiosoitteesi, niin saat e-kirjan heti. <strong> <\/strong><\/p>\n\n\n\n          \n\n          <div class=\"ml-embedded\" data-form=\"9gzBcu\"><\/div>\n          \n\n        \n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Kaava j\u00e4rjestelm\u00e4n tarvittavan MCB-luokituksen laskemiseksi<\/h2>\n\n<p><\/p>\n\n<p>Tarvitset alla olevan kuvan saadaksesi selville LED-ajureiden m\u00e4\u00e4r\u00e4n, jotka voit liitt\u00e4\u00e4 rinnakkain yhteen MCB:hen. Kaava LED-ohjaimen kuormitusluvun laskemiseksi on Min(I <sub>laukaisu<\/sub> \/I <sub>kuljettaja<\/sub> , <sub>pid\u00e4n<\/sub> \/I <sub>inrush)<\/sub> . Arvo on pienin kahden arvon v\u00e4lill\u00e4.<\/p>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<p><sub>Laukaisu<\/sub> : MCB:n nimellisvirta (riippuu eri tyypeist\u00e4 MCB:st\u00e4).<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>I <sub>ohjain<\/sub> : LED-ohjaimen suurin tulon keskim\u00e4\u00e4r\u00e4inen virta.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><sub>Pid\u00e4n<\/sub> : MCB:n hetkellinen nimellisvirta.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>I <sub>inrush<\/sub> : LED-ohjaimen suurin k\u00e4ynnistysvirta. <\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"372\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/different-types-of-MCB.webp\" alt=\"erilaisia mcb-tyyppej&#xE4;\" class=\"wp-image-10489\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/different-types-of-MCB.webp 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/different-types-of-MCB-300x186.webp 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/different-types-of-MCB-400x248.webp 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/different-types-of-MCB-367x228.webp 367w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n\n<p>Ja kriittisin k\u00e4yr\u00e4 laskea kuinka monta kappaletta LED-ajurit voit rinnakkain, on alla oleva k\u00e4yr\u00e4. Meid\u00e4n on l\u00f6ydett\u00e4v\u00e4 todistuskerroin vs. pulssin kestok\u00e4yr\u00e4 MCB-tietolomakkeesta, sitten l\u00f6ydett\u00e4v\u00e4 impulssin kesto LED-ajurin tietolomakkeesta, niin voit saada todistustekij\u00e4-K-arvon k\u00e4yr\u00e4n mukaan. Hanki sy\u00f6tt\u00f6huippuvirta LED-ajurin tietolomakkeesta. Tietolomakkeessa on yleens\u00e4 kahdenlaisia kestoja, T50 ja T10. T50 tarkoittaa kestoa 50 % huipusta 50 % huippuun, T10 tarkoittaa kestoa 10 % huipusta 10 % huippuun. K\u00e4yt\u00e4mme laskennassa T50-dataa.<\/p>\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"999\" height=\"625\" src=\"http:\/\/upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-2.png\" alt=\"\" class=\"wp-image-6037\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-2.png 999w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-2-600x375.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-2-300x188.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-2-768x480.png 768w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-2-640x400.png 640w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-2-400x250.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-2-367x230.png 367w\" sizes=\"(max-width: 999px) 100vw, 999px\" \/><\/figure>\n\n<p>Alla on tyypillinen esimerkki MCB-kuormien laskemisesta. <\/p>\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"572\" height=\"374\" src=\"http:\/\/upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-3.png\" alt=\"\" class=\"wp-image-6038\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-3.png 572w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-3-300x196.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-3-400x262.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-3-367x240.png 367w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2020\/04\/MCB-cal-3-560x367.png 560w\" sizes=\"(max-width: 572px) 100vw, 572px\" \/><\/figure>\n\n<p>T\u00e4h\u00e4n menness\u00e4 olet oppinut, mik\u00e4 on k\u00e4ynnistysvirta ja kuinka laskea MCB:hen kytkett\u00e4vien LED-ajurien lukum\u00e4\u00e4r\u00e4. Jos sinulla on edelleen ep\u00e4ilyksi\u00e4, voit l\u00e4hett\u00e4\u00e4 meille viestin saadaksesi lis\u00e4tietoja.<\/p>\n\n          \n\n          <div class=\"wp-block-contact-form-7-contact-form-selector\">\n            \n<div class=\"wpcf7 no-js\" id=\"wpcf7-f10070-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"10070\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/fi\/wp-json\/wp\/v2\/posts\/33059#wpcf7-f10070-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"10070\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.1\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f10070-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/><input type=\"hidden\" name=\"_wpcf7dtx_version\" value=\"5.0.3\" \/>\n<\/fieldset>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Your Name*\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Your Email*\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"10\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" placeholder=\"How can we help you?*\" name=\"your-message\"><\/textarea><\/span>\n<\/p>\n<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Send\" \/><br \/>\n<span class=\"wpcf7-form-control-wrap chapter\" data-name=\"chapter\"><input type=\"hidden\" name=\"chapter\" class=\"wpcf7-form-control wpcf7-hidden wpcf7dtx wpcf7dtx-hidden\" aria-invalid=\"false\" value=\"LED-ajurin k\u00e4ynnistysvirta ja MCB-m\u00e4\u00e4r\u00e4\"><\/span><br \/>\n<span class=\"wpcf7-form-control-wrap dynamicurl\" data-name=\"dynamicurl\"><input type=\"hidden\" name=\"dynamicurl\" id=\"post-url\" class=\"wpcf7-form-control wpcf7-hidden wpcf7dtx wpcf7dtx-hidden\" aria-invalid=\"false\" value=\"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/posts\/33059\"><\/span>\n<\/p><p style=\"display: none !important;\" class=\"akismet-fields-container\" data-prefix=\"_wpcf7_ak_\"><label>&#916;<textarea name=\"_wpcf7_ak_hp_textarea\" cols=\"45\" rows=\"8\" maxlength=\"100\"><\/textarea><\/label><input type=\"hidden\" id=\"ak_js_1\" name=\"_wpcf7_ak_js\" value=\"104\"\/><script>document.getElementById( \"ak_js_1\" ).setAttribute( \"value\", ( new Date() ).getTime() );<\/script><\/p><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n\n          <\/div>\n          \n\n        \n\n<div style=\"height:60px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">uPowerTek LED-ohjaimen MCB-valinta<\/h2>\n\n<p>Ensinn\u00e4kin, etsi huippuvirran kestotaulukko MCB-tietolomakkeesta, voit ottaa <sub>pit\u00e4v\u00e4n<\/sub> A- <sub>huipun<\/sub> , jonka mainitsimme yll\u00e4.<\/p>\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-dark-color has-text-color has-background\" style=\"background-color:#7ea5ca\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Kesto<br\/>[us]<\/th><th class=\"has-text-align-center\" data-align=\"center\">Nykyinen B10<br\/>[ <sub>Piikki<\/sub> ]<\/th><th class=\"has-text-align-center\" data-align=\"center\">Nykyinen B13<br\/>[ <sub>Piikki<\/sub> ]<\/th><th class=\"has-text-align-center\" data-align=\"center\">Nykyinen B16<br\/>[ <sub>Piikki<\/sub> ]<\/th><th class=\"has-text-align-center\" data-align=\"center\">Nykyinen B20<br\/>[ <sub>Piikki<\/sub> ]<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">100<\/td><td class=\"has-text-align-center\" data-align=\"center\">700<\/td><td class=\"has-text-align-center\" data-align=\"center\">910<\/td><td class=\"has-text-align-center\" data-align=\"center\">1120<\/td><td class=\"has-text-align-center\" data-align=\"center\">1400<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">200<\/td><td class=\"has-text-align-center\" data-align=\"center\">260<\/td><td class=\"has-text-align-center\" data-align=\"center\">338<\/td><td class=\"has-text-align-center\" data-align=\"center\">416<\/td><td class=\"has-text-align-center\" data-align=\"center\">520<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">300<\/td><td class=\"has-text-align-center\" data-align=\"center\">177<\/td><td class=\"has-text-align-center\" data-align=\"center\">230.1<\/td><td class=\"has-text-align-center\" data-align=\"center\">283<\/td><td class=\"has-text-align-center\" data-align=\"center\">354<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">400<\/td><td class=\"has-text-align-center\" data-align=\"center\">145<\/td><td class=\"has-text-align-center\" data-align=\"center\">188.5<\/td><td class=\"has-text-align-center\" data-align=\"center\">232<\/td><td class=\"has-text-align-center\" data-align=\"center\">290<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">500<\/td><td class=\"has-text-align-center\" data-align=\"center\">122<\/td><td class=\"has-text-align-center\" data-align=\"center\">158.6<\/td><td class=\"has-text-align-center\" data-align=\"center\">195<\/td><td class=\"has-text-align-center\" data-align=\"center\">244<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">600<\/td><td class=\"has-text-align-center\" data-align=\"center\">110<\/td><td class=\"has-text-align-center\" data-align=\"center\">143<\/td><td class=\"has-text-align-center\" data-align=\"center\">176<\/td><td class=\"has-text-align-center\" data-align=\"center\">220<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">700<\/td><td class=\"has-text-align-center\" data-align=\"center\">102<\/td><td class=\"has-text-align-center\" data-align=\"center\">132.6<\/td><td class=\"has-text-align-center\" data-align=\"center\">163<\/td><td class=\"has-text-align-center\" data-align=\"center\">204<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">800<\/td><td class=\"has-text-align-center\" data-align=\"center\">97<\/td><td class=\"has-text-align-center\" data-align=\"center\">126.1<\/td><td class=\"has-text-align-center\" data-align=\"center\">155<\/td><td class=\"has-text-align-center\" data-align=\"center\">194<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">900<\/td><td class=\"has-text-align-center\" data-align=\"center\">93<\/td><td class=\"has-text-align-center\" data-align=\"center\">120.9<\/td><td class=\"has-text-align-center\" data-align=\"center\">149<\/td><td class=\"has-text-align-center\" data-align=\"center\">186<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1000<\/td><td class=\"has-text-align-center\" data-align=\"center\">90<\/td><td class=\"has-text-align-center\" data-align=\"center\">117<\/td><td class=\"has-text-align-center\" data-align=\"center\">144<\/td><td class=\"has-text-align-center\" data-align=\"center\">180<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p>Paras MCB-valintasi on sellainen, joka v\u00e4hent\u00e4\u00e4 huippuvirtaa ja pulssin kestoa. T\u00e4st\u00e4 syyst\u00e4 uPowerTek keksi ratkaisun, joka on suunniteltu v\u00e4hent\u00e4m\u00e4\u00e4n LED-ajureiden sy\u00f6tt\u00f6virtaa.<\/p>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Lopulta poista MCB-valintavaikeudet<\/h2>\n\n<p><br\/>Kun j\u00e4rjestelm\u00e4 kasvaa, oikean MCB:n valinta on paljon vaikeampaa. N\u00e4in LED-ajurin k\u00e4ynnistysvirta pienenee tietylle tasolle, jolloin valintalaskelma liittyy vain normaalin toiminnan tulovirtaan. uPowerTekin uusi LED-ohjainrakenne v\u00e4hent\u00e4\u00e4 k\u00e4ynnistysvirran huippuarvon 1\/10 kilpailijoista, mik\u00e4 lis\u00e4\u00e4 huomattavasti MCB-valinnan tyydytyst\u00e4.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"448\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak-1024x448.png\" alt=\"k&#xE4;ynnistysvirran huippu\" class=\"wp-image-10492\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak-1024x448.png 1024w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak-600x262.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak-300x131.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak-768x336.png 768w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak-640x280.png 640w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak-400x175.png 400w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak-367x160.png 367w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2021\/12\/inrush-current-peak.png 1244w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n<div style=\"height:49px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Viimeiset sanat<\/h2>\n\n<p>Sy\u00f6tt\u00f6virta on kiistatta uhka LED-ajureille. Me kaikki haluamme tehokkaita LED-ajureita ja jopa pidemm\u00e4n k\u00e4ytt\u00f6i\u00e4n LED-ajureillemme. Hyv\u00e4 uutinen on, ett\u00e4 uPowerTek ottaa huomioon kaikki n\u00e4m\u00e4 ongelmat ja suunnittelee LED-ajurit j\u00e4rjestelmill\u00e4, jotka rajoittavat sy\u00f6tt\u00f6virtoja. Matka on ollut merkitt\u00e4v\u00e4, sill\u00e4 meill\u00e4 on nyt hyv\u00e4t tiedot sy\u00f6tt\u00f6virran k\u00e4sitteest\u00e4. \u00c4l\u00e4k\u00e4 unohda, ett\u00e4 uPowerTek tarjoaa edelleen hy\u00f6dyllist\u00e4 tietoa sek\u00e4 erinomaisia LED-ohjainratkaisuja.<\/p>\n\n<p class=\"has-medium-font-size\"><strong>Ota yhteytt\u00e4 nyt tiedustellaksesi matalan virran LED-ajureita<\/strong> !<\/p>\n\n          \n\n          <div class=\"wp-block-contact-form-7-contact-form-selector\">\n            \n<div class=\"wpcf7 no-js\" id=\"wpcf7-f10070-o2\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"10070\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/fi\/wp-json\/wp\/v2\/posts\/33059#wpcf7-f10070-o2\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"10070\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.1\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f10070-o2\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/><input type=\"hidden\" name=\"_wpcf7dtx_version\" value=\"5.0.3\" \/>\n<\/fieldset>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Your Name*\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Your Email*\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"10\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" placeholder=\"How can we help you?*\" name=\"your-message\"><\/textarea><\/span>\n<\/p>\n<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Send\" \/><br \/>\n<span class=\"wpcf7-form-control-wrap chapter\" data-name=\"chapter\"><input type=\"hidden\" name=\"chapter\" class=\"wpcf7-form-control wpcf7-hidden wpcf7dtx wpcf7dtx-hidden\" aria-invalid=\"false\" value=\"LED-ajurin k\u00e4ynnistysvirta ja MCB-m\u00e4\u00e4r\u00e4\"><\/span><br \/>\n<span class=\"wpcf7-form-control-wrap dynamicurl\" data-name=\"dynamicurl\"><input type=\"hidden\" name=\"dynamicurl\" id=\"post-url\" class=\"wpcf7-form-control wpcf7-hidden wpcf7dtx wpcf7dtx-hidden\" aria-invalid=\"false\" value=\"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/posts\/33059\"><\/span>\n<\/p><p style=\"display: none !important;\" class=\"akismet-fields-container\" data-prefix=\"_wpcf7_ak_\"><label>&#916;<textarea name=\"_wpcf7_ak_hp_textarea\" cols=\"45\" rows=\"8\" maxlength=\"100\"><\/textarea><\/label><input type=\"hidden\" id=\"ak_js_2\" name=\"_wpcf7_ak_js\" value=\"184\"\/><script>document.getElementById( \"ak_js_2\" ).setAttribute( \"value\", ( new Date() ).getTime() );<\/script><\/p><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n\n          <\/div>\n          \n\n        \n\n<p> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sy\u00f6tt\u00f6virta LED-valaistuksessa on yksi alue, joka on edelleen huolenaihe LED-valaistuksessa. Totuus on kuitenkin se, ett\u00e4 k\u00e4ynnistysvirtaa ei esiinny vain LEDeiss\u00e4, vaan my\u00f6s koko virtal\u00e4hdekonseptissa. On yleist\u00e4, ett\u00e4 MCB laukeaa. Katsotaanpa nyt, mit\u00e4 k\u00e4ynnistysvirta ja MCB tarkoittavat ja kuinka lasketaan MCB:hen kytkett\u00e4vien virtal\u00e4hteiden m\u00e4\u00e4r\u00e4. LED-sytytysvirtalaskin Jos haluat vain tiet\u00e4\u00e4 MCB:hen kytketyn LED-ajurin m\u00e4\u00e4r\u00e4n, voit k\u00e4ytt\u00e4\u00e4 sinulle [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":26948,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1487],"tags":[],"class_list":{"0":"post-33059","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-tietoa"},"_links":{"self":[{"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/posts\/33059","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/comments?post=33059"}],"version-history":[{"count":1,"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/posts\/33059\/revisions"}],"predecessor-version":[{"id":33133,"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/posts\/33059\/revisions\/33133"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/media\/26948"}],"wp:attachment":[{"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/media?parent=33059"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/categories?post=33059"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.upowertek.com\/fi\/wp-json\/wp\/v2\/tags?post=33059"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}