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aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Allikas: Vikipeedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="et" dir="ltr"><figure typeof="mw:File/Thumb"><a href="/wiki/Fail:Isolatsioonirike_juhtme_ja_maanduse_vahel.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Isolatsioonirike_juhtme_ja_maanduse_vahel.jpg/150px-Isolatsioonirike_juhtme_ja_maanduse_vahel.jpg" decoding="async" width="150" height="95" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Isolatsioonirike_juhtme_ja_maanduse_vahel.jpg/225px-Isolatsioonirike_juhtme_ja_maanduse_vahel.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Isolatsioonirike_juhtme_ja_maanduse_vahel.jpg/300px-Isolatsioonirike_juhtme_ja_maanduse_vahel.jpg 2x" data-file-width="1182" data-file-height="752" /></a><figcaption>Maaühendus <a href="/wiki/Faasijuht" title="Faasijuht">faasijuhtme</a> ja <a href="/wiki/Maa_(elektrotehnika)" title="Maa (elektrotehnika)">maa</a> vahel</figcaption></figure> <p><b>Maaühendus</b> on <a href="/wiki/Elektriv%C3%B5rk" title="Elektrivõrk">elektrivõrgus</a> oleva seadme pingestatud osa juhuslik <a href="/wiki/Elektrijuhtivus" title="Elektrijuhtivus">juhtiv</a> ühendus <a href="/wiki/Maa_(elektrotehnika)" title="Maa (elektrotehnika)">maaga</a> või maaga ühendatud seadmeosaga.<sup id="cite_ref-EE_1-0" class="reference"><a href="#cite_note-EE-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Maaühendus tekib tavaliselt isolatsioonirikke tagajärjel. Kui seejuures toitevõrgu neutraalpunkt on maandatud, kujutab maaühendus endast ühefaasilist <a href="/wiki/L%C3%BChis" title="Lühis">lühist</a>. Ka muudel juhtudel võib maaühendus areneda lühiseks. </p><p>Maaühendus on kas otsene (näiteks <a href="/wiki/Elektriliin" title="Elektriliin">õhuliini</a> <a href="/wiki/Juhe" title="Juhe">juhtme</a> mahalangemise korral) või kaudne (nt <a href="/wiki/Kere%C3%BChendus" title="Kereühendus">kereühendus</a> maandatud <a href="/wiki/Kere_(tehnika)" title="Kere (tehnika)">metallkere</a> või juhtivast materjalist kaitsekesta korral). Maaühendus võib põhjustada <a href="/wiki/Elektriseade" title="Elektriseade">elektriseadme</a> töös häireid ning ohtlikku <a href="/wiki/Sammupinge" title="Sammupinge">sammu-</a> ja <a href="/wiki/Puutepinge" title="Puutepinge">puutepinget</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Viited">Viited</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Maa%C3%BChendus&veaction=edit&section=1" title="Muuda alaosa "Viited"" class="mw-editsection-visualeditor"><span>muuda</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Maa%C3%BChendus&action=edit&section=1" title="Muuda alaosa "Viited" lähteteksti"><span>muuda lähteteksti</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-EE-1"><span class="mw-cite-backlink"><a href="#cite_ref-EE_1-0">↑</a></span> <span class="reference-text"><a href="/wiki/Eesti_ents%C3%BCklopeedia" title="Eesti entsüklopeedia">EE</a> 6. köide, 1992</span> </li> </ol></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Pärit leheküljelt "<a dir="ltr" href="https://et.wikipedia.org/w/index.php?title=Maaühendus&oldid=4753019">https://et.wikipedia.org/w/index.php?title=Maaühendus&oldid=4753019</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Eri:Kategooriad" title="Eri:Kategooriad">Kategooria</a>: <ul><li><a href="/wiki/Kategooria:Elektrotehnika" title="Kategooria:Elektrotehnika">Elektrotehnika</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Selle lehekülje viimane muutmine: 08:46, 28. september 2017.</li> <li id="footer-info-copyright">Tekst on kasutatav vastavalt Creative Commonsi litsentsile "<a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.et">Autorile viitamine + jagamine samadel tingimustel</a>"; sellele võivad lisanduda täiendavad tingimused. 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