{"id":2649,"date":"2018-03-15T14:06:57","date_gmt":"2018-03-15T12:06:57","guid":{"rendered":"https:\/\/www.senys.ro\/?p=2649"},"modified":"2024-03-27T08:08:55","modified_gmt":"2024-03-27T08:08:55","slug":"mentenanta-preventiva-termografiere-instalatii-tablouri-electrice","status":"publish","type":"post","link":"https:\/\/senys.ro\/en\/mentenanta-preventiva-termografiere-instalatii-tablouri-electrice\/","title":{"rendered":"Preventive maintenance by thermography of electrical installations and switchboards"},"content":{"rendered":"<div class=\"vgblk-rw-wrapper limit-wrapper\">\r\n<p><b>Termografierea instala\u021biilor \u0219i tablourilor electrice, termografia \u00een infraro\u0219u sau analiza termografic\u0103 <\/b>permite achizi\u021bia \u0219i analiza informa\u021biilor de natur\u0103 termic\u0103 ob\u021binute cu ajutorul echipamentelor de scanare \u00een infraro\u0219u, f\u0103r\u0103 contact.<\/p>\r\n<p>De multe ori, <b>primul semn al unei func\u021bion\u0103ri necorespunz\u0103toare este dat de o cre\u0219tere a temperaturii <\/b>\u00een zona \u00een care este identificat defectul. <b>Majoritatea problemelor<\/b> care apar \u00eentr-o instala\u021bie electric\u0103 sunt <b>din cauza supra\u00eenc\u0103lzirii<\/b> acesteia \u00een diferite puncte de conexiune. Aceste cre\u0219teri de temperatur\u0103 \u00een punctele de conexiune <b>apar din cauza oxid\u0103rii contactelor<\/b> care men\u021bin continuitatea electric\u0103, astfel cresc\u00e2nd rezisten\u021ba electric\u0103 a c\u0103ii de curent.<\/p>\r\n<p>Acest fenomen de supra\u00eenc\u0103lzire este foarte periculos, <b>conduc\u00e2nd la distrugerea termic\u0103 a izola\u021biei \u0219i la posibile surse de\u00a0<\/b><a href=\"https:\/\/senys.ro\/en\/blog\/sisteme-inovative-stingere-foc-minimalizare-intreruperi-activitate-business\/\"><strong>incendiu<\/strong><\/a>\u00a0dac\u0103 acestea nu sunt descoperite \u0219i remediate la timp. Nedescoperirea la timp a acestor defecte <strong>c<\/strong><b>onduce la opriri neprogramate a instala\u021biilor electrice<\/b>, ce se traduc prin costuri suplimentare cu mentenan\u021ba corectiv\u0103, costuri cu produsele care sunt afectate de oprirea instala\u021biei electrice, pierderi cu oprirea produc\u021biei pe perioada nefunc\u021bion\u0103rii instala\u021biei electrice etc.<\/p>\r\n<h3><a role=\"button\" href=\"https:\/\/senys.ro\/en\/servicii-termografiere\/\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/><strong>Solicita\u021bi ofert\u0103 termografiere<\/strong><br \/><\/a><\/h3>\r\n<h3>\u00a0<\/h3>\r\n<h2>\u00cen industria electrotehnic\u0103 \u0219i energetic\u0103, termografierea este utilizat\u0103 pentru:<\/h2>\r\n<p>&nbsp;<\/p>\r\n<h3>Termografierea utilizat\u0103 pentru monitorizarea temperaturii traseelor de cablu<\/h3>\r\n<h4>Prin monitorizarea traseelor de cablu pot fi identificate defecte precum:<\/h4>\r\n<ol>\r\n<li><strong>Func\u021bionarea la suprasarcin\u0103<\/strong>. \u00cen mod normal, circuitele electrice sunt dimensionate \u00een func\u021bie de nevoile specifice la un moment dat, dar \u0219i pentru eventuale extinderi. A\u0219adar, dac\u0103 \u00een momentul extinderii este dep\u0103\u0219it\u0103 sarcina recomandat\u0103 pentru un traseu de cablu, acesta se supra\u00eenc\u0103lze\u0219te \u0219i deterioreaz\u0103 izola\u021bia.<\/li>\r\n<li><strong>Dezechilibrul fazelor<\/strong>. Circuitul electric trifazat ar trebui s\u0103 func\u021bioneze \u00een condi\u021bii similare pentru toate cele trei faze. De exemplu, \u00een cazul unor motoare trifazate, \u00eenc\u0103rcarea pe cele trei faze ale acestuia trebuie s\u0103 fie similar\u0103, altfel trebuie s\u0103 ne punem un semn de \u00eentrebare \u00een privin\u021ba func\u021bion\u0103rii acestuia. Dac\u0103 circuitul este dezechilibrat, \u00een momentul scan\u0103rii acestea vor avea temperaturi diferite, astfel detect\u00e2nd faza care are probleme.<\/li>\r\n<li><strong>Prezen\u021ba armonicilor<\/strong>. Curentul alternativ are tendin\u0163a de a circula la suprafa\u0163a conductorului. Acest fenomen este cunoscut sub denumirea de efect pelicular \u015fi este mai pronun\u0163at la frecven\u0163e \u00eenalte. Efectul pelicular este \u00een mod normal ignorat deoarece are un efect foarte mic la frecven\u0163a nominal\u0103 de alimentare (50 Hz), dar la peste 350 Hz, adic\u0103 de la armonica de ordinul 7, efectul pelicular devine important, provoc\u00e2nd pierderi suplimentare \u015fi \u00eenc\u0103lzire \u00een conductoarele de alimentare.<\/li>\r\n<\/ol>\r\n<p>&nbsp;<\/p>\r\n<h3>Termografierea utilizat\u0103 pentru monitorizarea tablourilor electrice<\/h3>\r\n<h4>Prin monitorizarea tablourilor electrice, pot fi identificate defecte precum:<\/h4>\r\n<ol>\r\n<li><strong>Contacte imperfecte<\/strong>. Spre deosebire de func\u021bionarea la suprasarcin\u0103, unde temperatura circuitului este constant\u0103 pe toat\u0103 lungimea acestuia, \u00een momentul \u00een care avem un contact imperfect, pe imaginea \u00een infraro\u0219u va ap\u0103rea un punct mai fierbinte care este sursa defectului, iar pe masur\u0103 ce ne dep\u0103rt\u0103m de acesta, temperatura va sc\u0103dea.<\/li>\r\n<li><strong>Supra\u00eenc\u0103lzirea aparatelor de comuta\u021bie<\/strong>. Contactele interne ale echipamentelor de comuta\u021bie se oxideaz\u0103 odat\u0103 cu trecerea timpului. Astfel, acestea nu mai func\u021bioneaz\u0103 \u00een parametri normali (se \u00eenc\u0103lzesc). Prin scanarea \u00een infraro\u0219u putem vedea temperatura de lucru a acestora, iar \u00een func\u021bie de aceasta se va decide dac\u0103 este necesar\u0103 o interven\u021bie asupra lor.<\/li>\r\n<\/ol>\r\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/senys.ro\/wp-content\/uploads\/2018\/03\/termografiere-contacte-imperfecte-1-768x483.png\" alt=\"termografiere-contacte-imperfecte\" width=\"640\" height=\"403\" \/> Contacte imperfecte <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/senys.ro\/wp-content\/uploads\/2018\/03\/termografiere-supraincalzire-aparate-comutatie-768x488.png\" alt=\"termografiere-supraincalzire-aparate-comutatie\" width=\"640\" height=\"407\" \/> Supra\u00eenc\u0103lzirea aparatelor de comuta\u021bie<\/p>\r\n<h2>Termografierea pentru monitorizarea temperaturii sistemelor de ac\u021bionare<\/h2>\r\n<p>&nbsp;<\/p>\r\n<h4>Prin monitorizarea sistemelor de ac\u021bionare, pot fi identificate defecte precum:<\/h4>\r\n<ol>\r\n<li>Supra\u00eenc\u0103lzirea bobinajului motorului;<\/li>\r\n<li>Supra\u00eenc\u0103lzirea lag\u0103rului motorului;<\/li>\r\n<li>Lipsa lubrifierii sistemelor.<\/li>\r\n<\/ol>\r\n<h4>Avantaje monitorizare sisteme de ac\u021bionare<\/h4>\r\n<ol>\r\n<li>Aparatura utilizat\u0103 pentru scanare nu emite radia\u021bii care s\u0103 afecteze operatorul sau personalul aflat \u00een apropiere;<\/li>\r\n<li>Pentru efectuarea scan\u0103rii \u00een infraro\u0219u nu este necesar contactul direct cu instala\u021bia aflat\u0103 sub tensiune;<\/li>\r\n<li>Defectele sunt descoperite \u00eentr-un timp foarte scurt \u0219i nu necesit\u0103 oprirea instala\u021biei;<\/li>\r\n<li>Permite analiza \u00een timp real;<\/li>\r\n<li>Scanarea poate fi f\u0103cut\u0103 \u0219i asupra instala\u021biilor fierbin\u021bi sau aflate \u00een locuri greu accesibile, f\u0103r\u0103 a fi afectat operatorul;<\/li>\r\n<li>Scanarea poate fi repetat\u0103 ori de c\u00e2te ori dore\u0219te operatorul deoarece aceasta nu afecteaz\u0103 instala\u021bia.<\/li>\r\n<\/ol>\r\n<p>&nbsp;<\/p>\r\n<h2>Studiu de caz &#8211; Termografierea instala\u021biilor electrice la un produc\u0103tor de materiale de construc\u021bie<\/h2>\r\n<p>&nbsp;<\/p>\r\n<p>\u00cen urma solicit\u0103rii venite din partea unui client din industria produc\u0103toare de materiale de construc\u021bie, am realizat o serie de scan\u0103ri cu camera de termoviziune pe tablourile generale de distribu\u021bie a energiei electrice \u0219i s-au descoperit c\u00e2teva puncte critice unde este necesar\u0103 o interven\u021bie urgent\u0103 pentru remedierea situa\u021biei \u0219i evitarea unui defect sau accident.<\/p>\r\n<h3>Defect la tabloul general de distribu\u021bie<\/h3>\r\n<ol>\r\n<li>Locul inspec\u021biei: Tablou general de distribu\u021bie<\/li>\r\n<li>Echipament inspectat: Circuit TF 20 + iluminat TB<\/li>\r\n<li>Locul defectului: Papuc conexiune cablu faza S<\/li>\r\n<li>Temperatura m\u0103surat\u0103: 272,3 \u02daC<\/li>\r\n<li>Temperatura de referin\u021b\u0103: 30,1 \u02daC<\/li>\r\n<li>Supratemperatura real\u0103: 242,2 \u02daC<\/li>\r\n<li>Supratemperatura admis\u0103: 30 \u02daC<\/li>\r\n<li>Curent de sarcin\u0103: 10,89 A<\/li>\r\n<li>Curent de sarcin\u0103 maxim: 59 A<\/li>\r\n<li>Tipul interven\u021biei: imediat<\/li>\r\n<\/ol>\r\n<figure>Dup\u0103 cum se observ\u0103, papucul de conexiune de la ie\u0219irea din MPR-ul fazei S are o temperatur\u0103 de 273,3 \u00b0C.<\/figure>\r\n<figure>Acest lucru indic\u0103 un contact imperfect datorat oxid\u0103rii contactului care men\u021bine continuitatea electric\u0103, ce conduce la cre\u0219terea rezisten\u021bei electrice a c\u0103ii de curent \u0219i la generarea de c\u0103ldur\u0103.<\/figure>\r\n<figure>Acest fenomen de supra\u00eenc\u0103lzire este foarte periculos deoarece conduce la distrugerea termic\u0103 a izola\u021biei \u0219i la posibile surse de incediu dac\u0103 acestea nu sunt descoperite \u0219i remediate la timp.<\/figure>\r\n<p>&nbsp;<\/p>\r\n<h3>Defect la transformator<\/h3>\r\n<ol>\r\n<li>Locul inspec\u021biei: Transformator 1<\/li>\r\n<li>Echipament inspectat: Circuit alimentare general\u0103 Trafo 1<\/li>\r\n<li>Locul defectului: Papuc conexiune cablu faza S \u0219i T<\/li>\r\n<li>Temperatura m\u0103surat\u0103: 106,7 \u02daC<\/li>\r\n<li>Temperatura de referin\u021b\u0103: 65,7 \u02daC<\/li>\r\n<li>Supratemperatura real\u0103: 41,0 \u02daC<\/li>\r\n<li>Supratemperatura admis\u0103: 30 \u02daC<\/li>\r\n<li>Curent de sarcin\u0103: 362,56 A<\/li>\r\n<li>Curent de sarcin\u0103 maxim: 610 A<\/li>\r\n<li>Tipul interven\u021biei: imediat<\/li>\r\n<\/ol>\r\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/senys.ro\/wp-content\/uploads\/2018\/03\/defect-2-768x280.png\" alt=\"defect transformator\" width=\"640\" height=\"233\" \/><br \/>Dup\u0103 cum se observ\u0103, papucii de conexiune \u00eentre barele \u0219i conductoarele de alimentare de pe faza S \u0219i T au o temperatur\u0103 de aproximativ 106 \u00b0C.<br \/>Fiind vorba de barele de alimentare pe partea de joas\u0103 tensiune a transformatorului, defectarea poate conduce la \u00eentreruperea aliment\u0103rii cu energie electric\u0103 a \u00eentregii fabrici produc\u00e2nd pierderi foarte mari.<\/p>\r\n<h3>\u00a0<\/h3>\r\n<h3>Defect la circuitul de alimentare<\/h3>\r\n<ol>\r\n<li>Locul inspec\u021biei: Circuit TF4<\/li>\r\n<li>Echipament inspectat: Circuit alimentare faza R<\/li>\r\n<li>Locul defectului: Papuc sertizare cablu faza R<\/li>\r\n<li>Temperatura m\u0103surat\u0103: 137,7 \u02daC<\/li>\r\n<li>Temperatura de referin\u021b\u0103: 46,5 \u02daC<\/li>\r\n<li>Supratemperatura real\u0103: 91,2 \u02daC<\/li>\r\n<li>Supratemperatura admis\u0103: 30 \u02daC<\/li>\r\n<li>Curent de sarcin\u0103: 191,35 A<\/li>\r\n<li>Curent de sarcin\u0103 maxim: 259 A<\/li>\r\n<li>Tipul interven\u021biei: imediat<\/li>\r\n<\/ol>\r\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/senys.ro\/wp-content\/uploads\/2018\/03\/Defect-3-768x279.png\" alt=\"Defect circuit alimetare\" width=\"640\" height=\"233\" \/> Defect la circuitul de alimentare<\/p>\r\n<ol>\r\n<li>Locul inspec\u021biei: Circuit TF5<\/li>\r\n<li>Echipament inspectat: Circuit alimentare faza S<\/li>\r\n<li>Locul defectului: \u0218urub intrare suport MPR<\/li>\r\n<li>Temperatura m\u0103surat\u0103: 132,8 \u02daC<\/li>\r\n<li>Temperatura de referin\u021b\u0103: 46,5 \u02daC<\/li>\r\n<li>Supratemperatura real\u0103: 86,3 \u02daC<\/li>\r\n<li>Supratemperatura admis\u0103: 30 \u02daC<\/li>\r\n<li>Curent de sarcin\u0103: 191,35 A<\/li>\r\n<li>Curent de sarcin\u0103 maxim: 259 A<\/li>\r\n<li>Tipul interven\u021biei: imediat<\/li>\r\n<\/ol>\r\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/senys.ro\/wp-content\/uploads\/2018\/03\/Defect-4-768x284.png\" alt=\"Defect circuit alimentare\" width=\"640\" height=\"237\" \/> Defect la circuitul de alimentare<\/p>\r\n<ol>\r\n<li>Locul inspec\u021biei: Circuit TF10<\/li>\r\n<li>Echipament inspectat: Circuit alimentare faza S<\/li>\r\n<li>Locul defectului: \u0218urub intrare suport MPR<\/li>\r\n<li>Temperatura m\u0103surat\u0103: 148,3 \u02daC<\/li>\r\n<li>Temperatura de referin\u021b\u0103: 42,2 \u02daC<\/li>\r\n<li>Supratemperatura real\u0103: 106,1 \u02daC<\/li>\r\n<li>Supratemperatura admis\u0103: 30 \u02daC<\/li>\r\n<li>Curent de sarcin\u0103: 251,35 A<\/li>\r\n<li>Curent de sarcin\u0103 maxim: 500 A<\/li>\r\n<li>Tipul interven\u021biei: imediat<\/li>\r\n<\/ol>\r\n<p>Majoritatea defectelor identificate au leg\u0103tur\u0103 cu elemente de conexiune care au contacte imperfecte, dar sunt u\u0219or de remediat.\u00a0 Prin eliminarea acestor defecte se reduc pierderile de energie electric\u0103 (prin conversie \u00een energie termic\u0103) \u0219i, totodat\u0103, prin mentenan\u021b\u0103 preventiv\u0103 se elimin\u0103 posibilitatea apari\u021biei altor surse de defec\u021biuni.<\/p>\r\n<hr \/>\r\n<h3><strong>Concluzie<\/strong><\/h3>\r\n<p>Termografierea instala\u021biilor \u0219i tablourilor electrice, termografia \u00een infraro\u0219u sau analiza termografic\u0103 reprezint\u0103 un instrument foarte puternic, cu care pot fi detectate foarte u\u0219or problemele de natur\u0103 termic\u0103 ap\u0103rute \u00eentr-o instala\u021bie electric\u0103 sau \u00eentr-un tablou electric.<\/p>\r\n<p>&nbsp;<\/p>\r\n<h3><a role=\"button\" href=\"https:\/\/senys.ro\/en\/servicii-termografiere\/\"><br \/><strong>Contacta\u021bi echipa Senys pentru solu\u021bii de termografiere<\/strong><br \/><\/a><\/h3>\r\n<\/div><!-- .vgblk-rw-wrapper -->","protected":false},"excerpt":{"rendered":"<p>Termografierea instala\u021biilor \u0219i tablourilor electrice, termografia \u00een infraro\u0219u sau analiza termografic\u0103 permite achizi\u021bia \u0219i analiza informa\u021biilor de natur\u0103 termic\u0103 ob\u021binute cu ajutorul echipamentelor de scanare \u00een infraro\u0219u, f\u0103r\u0103 contact. De multe ori, primul semn al unei func\u021bion\u0103ri necorespunz\u0103toare este dat de o cre\u0219tere a temperaturii \u00een zona \u00een care este identificat defectul. Majoritatea problemelor care&#8230;<\/p>","protected":false},"author":11,"featured_media":230769,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[84,180,120],"tags":[179,181,182,183,184,185,186,187],"class_list":["post-2649","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-audit-energetic-industrial","category-managementul-mentenantei","category-solutii-eficienta-energetica","tag-analiza-termografica","tag-mentenanta-preventiva","tag-termografia-in-infrarosu","tag-termografie","tag-termografiere","tag-termografiere-instalatii-electrice","tag-termografiere-tablouri-electrice","tag-verificare-instalatii-electrice"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Termografierea instala\u021biilor \u0219i tablourilor electrice = mentenan\u021b\u0103 preventiv\u0103<\/title>\n<meta name=\"description\" content=\"Termografierea instala\u021biilor \u0219i tablourilor electrice, termografia \u00een infraro\u0219u sau analiza termografic\u0103 poate detecta problemele la instala\u021biile electrice.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/senys.ro\/en\/blog\/mentenanta-preventiva-termografiere-instalatii-tablouri-electrice\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mentenan\u021ba preventiv\u0103 prin termografierea instala\u021biilor \u0219i tablourilor electrice\" \/>\n<meta property=\"og:description\" content=\"Termografierea instala\u021biilor \u0219i tablourilor electrice, termografia \u00een infraro\u0219u sau analiza termografic\u0103 poate detecta problemele la 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