{"id":8234628,"date":"2026-10-24T17:30:32","date_gmt":"2026-10-24T17:30:32","guid":{"rendered":"https:\/\/scn.eu\/?post_type=scn_guide&#038;p=8234628"},"modified":"2026-10-24T17:32:46","modified_gmt":"2026-10-24T17:32:46","slug":"relee-kontaktor-pooljuhtrelee","status":"publish","type":"scn_guide","link":"https:\/\/scn.eu\/et\/juhendid\/relee-kontaktor-pooljuhtrelee\/","title":{"rendered":"Relee, kontaktor v\u00f5i pooljuhtrelee \u2013 mida valida?"},"content":{"rendered":"<div class=\"scn-guide\">\n<h1>Relee, kontaktor v\u00f5i pooljuhtrelee \u2013 mida valida?<\/h1>\n<p class=\"g-lead\">Relee, pooljuhtrelee (SSR) ja kontaktor l\u00fclitavad k\u00f5ik koormust sisse ja v\u00e4lja v\u00e4ikese juhtsignaali abil. \u00d5ige valik s\u00f5ltub voolust, pingest, l\u00fclitussagedusest ja sellest, kas koormus t\u00f6\u00f6tab vahelduv- v\u00f5i alalisvoolul.<\/p>\n<div class=\"g-short\"><b class=\"t\">L\u00fchidalt<\/b><\/p>\n<ul>\n<li><b>Relee<\/b> \u2013 mehaanilised kontaktid juhtsignaalidele ja v\u00e4iksematele koormustele, tavaliselt kuni 10\u201316 A. Odav ja v\u00e4ljal\u00fclitatult t\u00f5elise \u00f5huvahega.<\/li>\n<li><b>Pooljuhtrelee (SSR)<\/b> \u2013 liikuvate osadeta, h\u00e4\u00e4letu ja ei kulu. Soojeneb ja vajab sageli jahutusradiaatorit.<\/li>\n<li><b>Kontaktor<\/b> \u2013 v\u00f5imas relee mootoritele, k\u00fcttele ja toiteahelatele, sageli kolmefaasiline ja kuni sadade amprite jaoks.<\/li>\n<li><b>Alalisvool on keerulisem kui vahelduvvool<\/b> \u2013 alalisvoolul puudub nulll\u00e4bimine, mis kaare kustutaks. Vali alalisvoolu jaoks ette n\u00e4htud seadmed.<\/li>\n<li><b>Rusikareegel<\/b> \u2013 sage l\u00fclitamine: pooljuhtrelee. Harv l\u00fclitamine suure vooluga: kontaktor.<\/li>\n<\/ul>\n<\/div>\n<h2>Mis vahe on releel, pooljuhtreleel ja kontaktoril?<\/h2>\n<p><b>Releel<\/b> on m\u00e4his, mis t\u00f5mbab liikuvat kontakti. Juhtpool ja koormuspool on teineteisest galvaaniliselt eraldatud. DIN-liistule paigaldatavad vahereleed v\u00f5imaldavad PLC v\u00e4ljundil juhtida n\u00e4iteks klappi v\u00f5i lampi.<\/p>\n<p><b>Pooljuhtreleel (SSR)<\/b> pole liikuvaid osi. Juhtsignaal s\u00fc\u00fctab optroni valgusdioodi ja valgus avab t\u00fcristori, triaki v\u00f5i MOSFET-i, mis juhib koormusvoolu. L\u00fclitamine on h\u00e4\u00e4letu ja ei p\u00f5hjusta kulumist. Hinnaks on soojus ja v\u00e4ike lekkevool ka v\u00e4ljal\u00fclitatud olekus.<\/p>\n<p><b>Kontaktor<\/b> on sisuliselt suure v\u00f5imsuse jaoks ehitatud relee. Tavaliselt on sellel kolm peakontakti kolmefaasilise koormuse jaoks, kaarekustutuskambrid ja koht abikontaktidele. Vahelduvvoolukontaktorid katsetatakse standardi IEC 60947-4-1 j\u00e4rgi kasutuskategooriatega, n\u00e4iteks AC-1 aktiivkoormustele ning AC-3 as\u00fcnkroonmootorite k\u00e4ivitamiseks ja seiskamiseks.<\/p>\n<figure><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2026\/10\/scn-guide-rela-f1-et.webp\" alt=\"P\u00f5him\u00f5tteskeem: releel t\u00f5mbab m\u00e4his liikuvat kontakti, pooljuhtrelee juhib t\u00fcristori optroni kaudu ja kontaktoril t\u00f5mbab m\u00e4his korraga kolme peakontakti\" width=\"1520\" height=\"500\" loading=\"lazy\" decoding=\"async\"><figcaption>Relee ja kontaktor l\u00fclitavad mehaaniliste kontaktidega, pooljuhtrelee pooljuhiga.<\/figcaption><\/figure>\n<div class=\"g-tbl\">\n<table>\n<thead>\n<tr>\n<th>Omadus<\/th>\n<th>Relee<\/th>\n<th>Pooljuhtrelee (SSR)<\/th>\n<th>Kontaktor<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"n\">T\u00fc\u00fcpiline vool<\/td>\n<td>Kuni 10\u201316 A<\/td>\n<td>M\u00f5nest amprist kuni umbes 100 A faasi kohta<\/td>\n<td>Umbes 10 A kuni \u00fcle 1 000 A<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">Kulumine<\/td>\n<td>Kontaktid kuluvad<\/td>\n<td>Mehaaniline kulumine puudub<\/td>\n<td>Kontaktid kuluvad, kuid on vastupidavamad<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">Sage l\u00fclitamine<\/td>\n<td>Sobib halvemini<\/td>\n<td>Sobib v\u00e4ga h\u00e4sti<\/td>\n<td>Sobib halvemini<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">Soojus<\/td>\n<td>V\u00e4ike<\/td>\n<td>Umbes 1\u20131,5 W ampri kohta<\/td>\n<td>V\u00e4ike<\/td>\n<\/tr>\n<tr>\n<td class=\"n\">T\u00fc\u00fcpiline rike<\/td>\n<td>Kontaktid keevituvad kokku<\/td>\n<td>Pooljuht j\u00e4\u00e4b rikke korral sissel\u00fclitatud olekusse<\/td>\n<td>Kontaktid keevituvad kokku<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2>Soojus, jahutusradiaatorid ja nulll\u00e4bimine \u2013 mida pooljuhtreleede kohta teada<\/h2>\n<p>T\u00fcristoril p\u00f5hineva pooljuhtrelee pingelang on umbes 1\u20131,5 V. Rusikareeglina annab see 1\u20131,5 W soojust ampri kohta, nii et 25 A voolu juhtiv pooljuhtrelee eraldab 25\u201340 W. Jahutusradiaatori v\u00f5imekus antakse soojustakistusena \u00fchikutes K\/W \u2013 mida v\u00e4iksem, seda parem. Celduci arvutusn\u00e4ites vajab \u00fcks nende pooljuhtreleedest 40 A voolu ja 30 \u00b0C \u00fcmbritseva temperatuuri korral 1,2 K\/W jahutusradiaatorit.<\/p>\n<p><b>Nulll\u00fclitusega<\/b> pooljuhtrelee l\u00fclitub sisse ainult siis, kui vahelduvpinge l\u00e4bib nulli. See v\u00e4hendab elektrilisi h\u00e4ireid ja sobib aktiivkoormustele, n\u00e4iteks k\u00fctteelementidele. <b>Juhusliku sissel\u00fclitusega<\/b> pooljuhtrelee l\u00fclitub kohe ja sobib induktiivkoormustele, n\u00e4iteks trafodele, mille puhul nulll\u00e4bimisel l\u00fclitamine v\u00f5ib tekitada suuri sissel\u00fclitusvoole.<\/p>\n<div class=\"g-short\">\n<p style=\"margin:0\">N\u00e4ide: temperatuuriregulaator l\u00fclitab pooljuhtreleed iga sekund, et hoida keevitusleuad kuumad. See teeb \u00fcle 80 000 l\u00fclituse p\u00e4evas \u2013 mehaanilisele releele liiga palju.<\/p>\n<\/div>\n<h2>Vahelduv- v\u00f5i alalisvool: miks alalisvoolu on raskem katkestada<\/h2>\n<p>Kui kontaktid koormuse all avanevad, tekib elektrikaar. Vahelduvvool l\u00e4bib 50 Hz sagedusel nulli 100 korda sekundis ja kaar kustub j\u00e4rgmisel nulll\u00e4bimisel. Alalisvoolul nulll\u00e4bimist pole. Kaar v\u00f5ib edasi p\u00f5leda ja kontaktid h\u00e4vitada. Seet\u00f5ttu talub relee, mille nimipinge on 250 V AC, sama voolu juures sageli ainult 30 V DC.<\/p>\n<figure><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2026\/10\/scn-guide-rela-f2-et.webp\" alt=\"Skeem: vahelduvvoolu korral kustub kaar, kui vool l\u00e4bib nulli, alalisvoolu korral p\u00f5leb kaar edasi, kuni see aktiivselt kustutatakse\" width=\"1520\" height=\"540\" loading=\"lazy\" decoding=\"async\"><figcaption>Vahelduvvoolu korral kustub kaar nulll\u00e4bimisel iseenesest. Alalisvoolu korral tuleb see aktiivselt kustutada.<\/figcaption><\/figure>\n<p>Akus\u00fcsteemides, elektris\u00f5idukites ja p\u00e4ikeseelektrijaamades kasutatakse seet\u00f5ttu <b>k\u00f5rgepinge-alalisvoolukontaktoreid<\/b> pingele 400\u20131 500 V. Kontaktid asuvad hermeetiliselt suletud gaasit\u00e4itega keraamilises kambris ja magnetid puhuvad kaare v\u00e4lja. M\u00f5ni mudel katkestab t\u00e4isvoolu ainult \u00fches suunas. Aku jaoks, mida nii laetakse kui ka t\u00fchjendatakse, on vaja kahesuunalist kontaktorit. Pooljuht-alalisvoolukontaktorid katkestavad voolu \u00fcldse ilma kaareta.<\/p>\n<h2>Ajareleed, kontrollreleed ja turvareleed<\/h2>\n<ul>\n<li><b>Ajarelee<\/b> \u2013 viivitab sisse- v\u00f5i v\u00e4ljal\u00fclitamist, vilgutab v\u00f5i juhib mootori t\u00e4ht-kolmnurk-k\u00e4ivitust. N\u00e4ide: ventilaatori j\u00e4relt\u00f6\u00f6aeg.<\/li>\n<li><b>Kontrollrelee<\/b> \u2013 j\u00e4lgib pinget, voolu, sagedust, faaside j\u00e4rjestust v\u00f5i cos \u03c6 v\u00e4\u00e4rtust ja rakendub, kui v\u00e4\u00e4rtus v\u00e4ljub lubatud piiridest. N\u00e4ide: sageduse j\u00e4lgimine varugeneraatoril.<\/li>\n<li><b>Turvarelee<\/b> \u2013 j\u00e4lgib avariiseiskamisnuppe, kaitseuksi ja valguskardinaid. Sellel on sundjuhitavad kontaktid ja kaks kanalit ning see valitakse riskianal\u00fc\u00fcsiga n\u00f5utud toimivustaseme j\u00e4rgi (PL standardi EN ISO 13849-1 j\u00e4rgi).<\/li>\n<\/ul>\n<h2>Mida valida? Kasutusn\u00e4ited<\/h2>\n<div class=\"g-tbl\">\n<table>\n<thead>\n<tr>\n<th>Kui on vaja \u2026<\/th>\n<th>Vali<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>V\u00f5imendada PLC v\u00e4ljundit klapi v\u00f5i lambi juhtimiseks<\/td>\n<td>Vaherelee v\u00f5i I\/O-relee DIN-liistule<\/td>\n<\/tr>\n<tr>\n<td>Juhtida k\u00fctet paljude l\u00fclitustega minutis<\/td>\n<td>Nulll\u00fclitusega pooljuhtrelee koos jahutusradiaatoriga<\/td>\n<\/tr>\n<tr>\n<td>K\u00e4ivitada ja seisata kolmefaasilist mootorit<\/td>\n<td>AC-3 kategooria kontaktor ja mootorikaitse<\/td>\n<\/tr>\n<tr>\n<td>\u00dchendada ja lahutada 400\u20131 500 V DC akut<\/td>\n<td>K\u00f5rgepinge-alalisvoolukontaktor<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<ul>\n<li><b>Tehased<\/b> \u2013 vahereleed magnetklappidele, pooljuhtreleed pakkemasinate keevitusleugadele, kontaktorid konveieritele.<\/li>\n<li><b>S\u00f5idukid ja liikurmasinad<\/b> \u2013 peakontaktorid elektrilistes kahvelt\u00f5stukites, elektribussides ja kaevandusmasinates.<\/li>\n<li><b>Energeetika<\/b> \u2013 akusalvestid ja p\u00e4ikeseelektrijaamad pingel 1 000\u20131 500 V DC, sageduse j\u00e4lgimine generaatoritel.<\/li>\n<li><b>Taristu<\/b> \u2013 pumbajaamad pumpade vaheldusreleedega ja ajareleed ventilatsioonis.<\/li>\n<li><b>Lennundus ja kaitset\u00f6\u00f6stus<\/b> \u2013 hermeetiliselt suletud releed temperatuurivahemikule \u221270 kuni +125 \u00b0C.<\/li>\n<li><b>Labor ja meditsiin<\/b> \u2013 h\u00e4\u00e4letud pooljuhtreleed inkubaatorite ja anal\u00fcsaatorite k\u00fctte jaoks.<\/li>\n<\/ul>\n<h2>Viis levinud viga<\/h2>\n<ol class=\"g-pit\">\n<li><b>Pooljuhtrelee ilma piisava jahutusradiaatorita.<\/b> Nimivool kehtib ainult \u00f5ige jahutuse korral. Arvesta temperatuuriga juhtkilbi sees.<\/li>\n<li><b>Vahelduvvoolu relee alalisvoolul.<\/b> Nimiandmed 10 A 250 V AC ei \u00fctle alalisvoolu kohta midagi. Kontrolli andmelehelt alalisvoolu andmeid.<\/li>\n<li><b>Vale kasutuskategooria.<\/b> Kontaktor talub aktiivkoormuse korral (AC-1) suuremat voolu kui mootorite korral (AC-3). Vali see koormuse j\u00e4rgi.<\/li>\n<li><b>Lekkevool unustatakse.<\/b> V\u00e4ljal\u00fclitatud pooljuhtrelee lekib m\u00f5ne milliampri \u2013 sellest piisab, et LED-lamp kumaks v\u00f5i PLC sisend loeks \u00fchte.<\/li>\n<li><b>Kaitsel\u00fclitus puudub.<\/b> Induktiivkoormused tekitavad v\u00e4ljal\u00fclitamisel pingepiike ning lambid ja kondensaatorid suuri sissel\u00fclitusvoole. Kasuta vabak\u00e4igudioodi, RC-summutit v\u00f5i varistorit.<\/li>\n<\/ol>\n<h2>Releed ja kontaktorid SCN-ilt<\/h2>\n<p>Meie valikus on Mibbo ja Tele Haase vahereleed, Celduci, Mibbo ja Nominal Controlsi pooljuhtreleed, Celduci jahutusradiaatorid ja tarvikud pooljuhtreleedele ning Gigavaci ja Rincon Poweri k\u00f5rgepinge-alalisvoolukontaktorid. Aja- ja kontrollreleed tulevad Tele Haaselt ning hermeetiliselt suletud releed lennundusele Leachilt.<\/p>\n<h3>N\u00e4ited meie valikust<\/h3>\n<div class=\"g-prod\"><a class=\"g-pc\" href=\"https:\/\/scn.eu\/et\/toode\/sobr965560-th-et\/\"><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2025\/01\/SOBR965560-TH.jpeg\" alt=\"Celduc SOBR965560-TH kahekanaliline pooljuhtrelee 2\u00d724 A\" width=\"800\" height=\"800\" loading=\"lazy\" decoding=\"async\"><span class=\"g-pb\">Celduc<\/span><span class=\"g-pn\">SOBR965560-TH kahekanaliline pooljuhtrelee 2\u00d724 A<\/span><span class=\"g-pw\">Uus: kahefaasiline nulll\u00fclitusega pooljuhtrelee push-in-klemmidega, 2 \u00d7 24 A pingel 24\u2013600 VAC \u2013 k\u00fcttekoormustele.<\/span><\/a><a class=\"g-pc\" href=\"https:\/\/scn.eu\/et\/toode\/gx16-et\/\"><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2025\/01\/gx16.jpeg\" alt=\"Gigavac GX16 \u0161assiile paigaldatav kontaktor\" width=\"800\" height=\"800\" loading=\"lazy\" decoding=\"async\"><span class=\"g-pb\">Gigavac<\/span><span class=\"g-pn\">GX16 \u0161assiile paigaldatav kontaktor<\/span><span class=\"g-pw\">Hermeetiliselt suletud \u0161assiile paigaldatav kontaktor, IP67 ja IP69K, temperatuurivahemikule \u221255 kuni 85 \u00b0C.<\/span><\/a><a class=\"g-pc\" href=\"https:\/\/scn.eu\/et\/toode\/e1k-e3k-coupling-relays-et\/\"><img loading=\"lazy\" src=\"https:\/\/scn.eu\/wp-content\/uploads\/2026\/10\/tele-haase-coup-main.webp\" alt=\"Tele Haase E1K \/ E3K vahereleed\" width=\"800\" height=\"800\" loading=\"lazy\" decoding=\"async\"><span class=\"g-pb\">Tele Haase<\/span><span class=\"g-pn\">E1K \/ E3K vahereleed<\/span><span class=\"g-pw\">DIN-liistule paigaldatavad vahereleed, 8 A pingel 250 V, mis eraldavad PLC v\u00e4ljundid koormusest.<\/span><\/a><\/div>\n<div class=\"g-links\"><a href=\"https:\/\/scn.eu\/et\/tootekategooria\/tooteid\/components-et\/relays-and-sockets-et\/\">Releed ja pesad<\/a><a href=\"https:\/\/scn.eu\/et\/tootekategooria\/tooteid\/components-et\/solid-state-relays-ssr-et\/\">Pooljuhtreleed (SSR)<\/a><a href=\"https:\/\/scn.eu\/et\/tootekategooria\/tooteid\/components-et\/power-contactors-et\/\">J\u00f5ukontaktorid<\/a><a href=\"https:\/\/scn.eu\/et\/tootekategooria\/tooteid\/components-et\/timing-relays-et\/\">Ajareleed<\/a><a href=\"https:\/\/scn.eu\/et\/tootekategooria\/tooteid\/components-et\/monitoring-relays-et\/\">Kontrollreleed<\/a><\/div>\n<div class=\"g-cta\">\n<p>Pole kindel, kas sinu koormus vajab releed, pooljuhtreleed v\u00f5i kontaktorit? K\u00fcsi meie inseneridelt \u2013 saad vastuse 24 tunni jooksul.<\/p>\n<p><a href=\"https:\/\/scn.eu\/et\/kontakt\/\">K\u00fcsi inseneri k\u00e4est<\/a><\/div>\n<h2>Korduma kippuvad k\u00fcsimused<\/h2>\n<details>\n<summary>Mis vahe on releel ja kontaktoril?<\/summary>\n<p>M\u00f5lemad t\u00f5mbavad m\u00e4hise abil mehaanilisi kontakte. Kontaktor on ehitatud suuremate voolude jaoks ja sellel on sageli kolm peakontakti kolmefaasilise koormuse jaoks. Releesid kasutatakse peamiselt juhtsignaalide ja v\u00e4iksemate koormuste jaoks.<\/p>\n<\/details>\n<details>\n<summary>Kas pooljuhtrelee saab asendada kontaktorit?<\/summary>\n<p>Sageli k\u00fcll, kui koormust l\u00fclitatakse tihti ja soojust on v\u00f5imalik \u00e4ra juhtida. Mootorite puhul ja siis, kui v\u00e4ljal\u00fclitatud olekus on vaja \u00f5huvahet, on tavaliselt parem kontaktor.<\/p>\n<\/details>\n<details>\n<summary>Miks mu pooljuhtrelee kuumeneb?<\/summary>\n<p>Selle umbes 1\u20131,5 V pingelang annab 1\u20131,5 W soojust ampri kohta. Ilma jahutusradiaatorita kuumeneb see \u00fcle juba m\u00f5ne ampri juures.<\/p>\n<\/details>\n<details>\n<summary>Kas vahelduvvoolu releed saab kasutada alalisvoolul?<\/summary>\n<p>Ainult andmelehel toodud alalisvoolu nimiandmete piires, mis on sageli palju madalamad, sest alalisvoolu kaart on raskem kustutada.<\/p>\n<\/details>\n<details>\n<summary>Mis on vaherelee?<\/summary>\n<p>Relee juhts\u00fcsteemi ja koormuse vahel. See eraldab PLC v\u00e4ljundi galvaaniliselt ja v\u00f5imaldab n\u00f5rgal v\u00e4ljundil l\u00fclitada suuremat voolu v\u00f5i teistsugust pinget.<\/p>\n<\/details>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Relee, pooljuhtrelee (SSR) ja kontaktor l\u00fclitavad k\u00f5ik koormust sisse ja v\u00e4lja v\u00e4ikese juhtsignaali abil. \u00d5ige valik s\u00f5ltub voolust, pingest, l\u00fclitussagedusest ja sellest, kas koormus t\u00f6\u00f6tab vahelduv- v\u00f5i alalisvoolul.<\/p>\n","protected":false},"author":11,"featured_media":8234402,"template":"","meta":{"_yoast_wpseo_focuskw":"pooljuhtrelee","_yoast_wpseo_metadesc":"Relee, kontaktor v\u00f5i pooljuhtrelee (SSR): erinevused voolu, eluea, soojuse ja AC\/DC l\u00fclitamise osas ning kuidas valida koormusele \u00f5ige 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