{"id":4739,"date":"2024-08-09T15:51:07","date_gmt":"2024-08-09T07:51:07","guid":{"rendered":"https:\/\/kvhipot.com\/?p=4739"},"modified":"2024-08-09T15:51:50","modified_gmt":"2024-08-09T07:51:50","slug":"jaky-je-rozdil-mezi-zkouskou-tan-delta-a-merenim-megohmetrem","status":"publish","type":"post","link":"https:\/\/kvhipot.com\/cs\/what-is-the-difference-between-tan-delta-test-and-megger-test\/","title":{"rendered":"Jak\u00fd je rozd\u00edl mezi zkou\u0161kou tan delta a m\u011b\u0159en\u00edm megohmetrem?"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Co je to m\u011b\u0159en\u00ed tan-delta?<\/h2><p>Zkou\u0161ka tan delta, zn\u00e1m\u00e1 tak\u00e9 jako zkou\u0161ka ztr\u00e1tov\u00e9ho faktoru (PF),\u00a0nebo testov\u00e1n\u00ed ztr\u00e1tov\u00e9ho \u00fahlu \u010di dielektrick\u00e9ho ztr\u00e1tov\u00e9ho faktoru (DDF), je diagnostick\u00e1 metoda pou\u017e\u00edvan\u00e1 k m\u011b\u0159en\u00ed dielektrick\u00e9ho ztr\u00e1tov\u00e9ho faktoru (tg\u03b4) a kapacity (Cx) a k hodnocen\u00ed stavu izolace elektrick\u00fdch za\u0159\u00edzen\u00ed, jako jsou kabely, transform\u00e1tory, kondenz\u00e1tory a rotuj\u00edc\u00ed stroje.<\/p><figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"612\" height=\"408\" src=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/08\/tansformer-1.jpg\" alt=\"\" class=\"wp-image-4748\" style=\"width:587px;height:auto\"\/><\/figure><p>\u00da\u010delem zkou\u0161ky dielektrick\u00fdch ztr\u00e1t je kontrola kvality technologick\u00e9ho zpracov\u00e1n\u00ed a kvality v\u00fdroby v r\u00e1mci v\u00fdrobn\u00edho procesu transform\u00e1tor\u016f. Tato zkou\u0161ka umo\u017e\u0148uje nep\u0159\u00edmo posoudit spolehlivost izolace transform\u00e1toru p\u0159i p\u016fsoben\u00ed vysok\u00e9ho nap\u011bt\u00ed.<\/p><p>D\u00e1le umo\u017e\u0148uje ov\u011b\u0159it, zda byla vakuov\u00e1 \u00faprava transform\u00e1toru provedena spr\u00e1vn\u011b \u010di nespr\u00e1vn\u011b, a posoudit vliv vlhkosti, st\u00e1rnut\u00ed a ne\u010distot, a to s c\u00edlem v\u010das odhalit lok\u00e1ln\u00ed vady izolace transform\u00e1toru.<\/p><p>Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t se obvykle ozna\u010duje jako zkou\u0161ka izola\u010dn\u00edch vlastnost\u00ed.<\/p><h2 class=\"wp-block-heading\">Princip m\u011b\u0159en\u00ed tan delta<\/h2><p>V\u00fdkon P, kter\u00fd izola\u010dn\u00ed m\u00e9dium spot\u0159ebov\u00e1v\u00e1 pod vlivem st\u0159\u00eddav\u00e9ho nap\u011bt\u00ed, p\u0159edstavuje dielektrick\u00e9 ztr\u00e1ty (obr. 1). Hodnota P se v\u0161ak m\u011bn\u00ed s prom\u011bnami nap\u011bt\u00ed U, jedn\u00e1 se tedy o prom\u011bnnou veli\u010dinu.<\/p><p>K n\u00e1zorn\u00e9mu zn\u00e1zorn\u011bn\u00ed dielektrick\u00fdch ztr\u00e1t pou\u017e\u00edv\u00e1me dielektrick\u00fd ztr\u00e1tov\u00fd faktor tan\u03b4. D\u016fvodem pro existenci \u03b4 je skute\u010dnost, \u017ee izola\u010dn\u00ed m\u00e9dium podl\u00e9h\u00e1 nejen ztr\u00e1t\u00e1m \u010dinn\u00e9ho v\u00fdkonu P, ale tak\u00e9 ztr\u00e1t\u00e1m jalov\u00e9ho v\u00fdkonu Q.<\/p><p>To m\u00e1 za n\u00e1sledek, \u017ee \u00fahel \u03c6, kter\u00fd ur\u010duje \u00fa\u010din\u00edk mezi p\u0159iv\u00e1d\u011bn\u00fdm st\u0159\u00eddav\u00fdm nap\u011bt\u00edm a proudem, je men\u0161\u00ed ne\u017e 90\u00b0. \u03b4 je zbytkov\u00fd \u00fahel \u00fa\u010din\u00edku (obr\u00e1zek 2). tan\u03b4 lze vyj\u00e1d\u0159it jako<\/p><figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"512\" height=\"392\" src=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/08\/Tan-delta-Testing-Circuit-1.jpg\" alt=\"\" class=\"wp-image-4742\"\/><\/figure><figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"256\" height=\"169\" src=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/08\/tan-delta-formula-1.png\" alt=\"\" class=\"wp-image-4746\"\/><\/figure><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"385\" height=\"343\" src=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/08\/Tan-delta-Testing-Circuit-2.jpg\" alt=\"\" class=\"wp-image-4743\"\/><\/figure><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"591\" height=\"365\" src=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/08\/Tan-delta-Testing-Circuit-3.jpg\" alt=\"\" class=\"wp-image-4744\"\/><\/figure><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"596\" height=\"339\" src=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/08\/Tan-delta-Testing-Circuit-4.jpg\" alt=\"\" class=\"wp-image-4745\"\/><\/figure><figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"364\" height=\"331\" src=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/08\/tan-delta-formula-2.png\" alt=\"\" class=\"wp-image-4747\"\/><\/figure><p>Jakmile je stanoven stav transform\u00e1toru, a\u0165 u\u017e v s\u00e9riov\u00e9m nebo paraleln\u00edm modelu, jsou ur\u010deny tak\u00e9 ekvivalentn\u00ed odpor a kapacita transform\u00e1toru, a t\u00edm je pro ur\u010ditou hodnotu stanovena i hodnota tan\u03b4 zku\u0161ebn\u00ed kombinace.<\/p><p>Proto se m\u00e1 za to, \u017ee tan\u03b4 je vlastn\u00ed ur\u010dit\u00e9mu stavu izola\u010dn\u00edho materi\u00e1lu, co\u017e lze pou\u017e\u00edt jako z\u00e1klad pro posouzen\u00ed, zda je izola\u010dn\u00ed stav v\u00fdrobku dobr\u00fd \u010di nikoli, a p\u0159edstavuje jednu ze z\u00e1kladn\u00edch charakteristik izola\u010dn\u00edho m\u00e9dia.<\/p><h2 class=\"wp-block-heading\">Je zkou\u0161ka tan Delta destruktivn\u00ed?<\/h2><p>Zkou\u0161ka Tan Delta je nedestruktivn\u00ed diagnostick\u00e1 metoda pou\u017e\u00edvan\u00e1 k posouzen\u00ed stavu izolace v transform\u00e1torech a dal\u0161\u00edch elektrick\u00fdch za\u0159\u00edzen\u00edch. Tato zkou\u0161ka hodnot\u00ed dielektrick\u00e9 vlastnosti izola\u010dn\u00edch materi\u00e1l\u016f a pom\u00e1h\u00e1 odhalit potenci\u00e1ln\u00ed probl\u00e9my, ani\u017e by do\u0161lo k po\u0161kozen\u00ed.<\/p><p><strong>Nedestruktivn\u00ed povaha<\/strong><\/p><p>Zkou\u0161ka Tan Delta je koncipov\u00e1na jako nedestruktivn\u00ed, co\u017e znamen\u00e1, \u017ee fyzicky nepo\u0161kozuje transform\u00e1tor ani jeho izolaci. M\u011b\u0159\u00ed ztr\u00e1tov\u00fd faktor, kter\u00fd ud\u00e1v\u00e1 kvalitu izolace a pom\u00e1h\u00e1 odhalit probl\u00e9my, jako je vlhkost nebo zne\u010di\u0161t\u011bn\u00ed, ani\u017e by do\u0161lo ke zm\u011bn\u011b integrity za\u0159\u00edzen\u00ed.<\/p><p><strong>Posouzen\u00ed stavu izolace<\/strong><\/p><p>Na z\u00e1klad\u011b m\u011b\u0159en\u00ed hodnoty tan delta mohou provozovatel\u00e9 ur\u010dit stupe\u0148 opot\u0159eben\u00ed izolace. Vysok\u00e9 hodnoty tan delta mohou signalizovat probl\u00e9my, jako je st\u00e1rnut\u00ed, vniknut\u00ed vlhkosti nebo zne\u010di\u0161t\u011bn\u00ed, co\u017e vy\u017eaduje dal\u0161\u00ed vy\u0161et\u0159en\u00ed \u010di \u00fadr\u017ebov\u00e9 z\u00e1sahy.<\/p><p><strong>Srovn\u00e1vac\u00ed anal\u00fdza<\/strong><\/p><p>V\u00fdsledky test\u016f Tan Delta lze porovn\u00e1vat v \u010dase, co\u017e umo\u017e\u0148uje sledovat stav izolace a identifikovat trendy, kter\u00e9 mohou nazna\u010dovat zhor\u0161uj\u00edc\u00ed se stav. To pom\u00e1h\u00e1 p\u0159i efektivn\u00edm pl\u00e1nov\u00e1n\u00ed strategi\u00ed \u00fadr\u017eby a v\u00fdm\u011bny.<\/p><p><strong>Citlivost na probl\u00e9my s izolac\u00ed<\/strong><\/p><p>Tento test citliv\u011b reaguje na zm\u011bny kvality izolace, d\u00edky \u010demu\u017e je \u00fa\u010dinn\u00fd p\u0159i v\u010dasn\u00e9m odhalov\u00e1n\u00ed probl\u00e9m\u016f. Tento proaktivn\u00ed p\u0159\u00edstup m\u016f\u017ee zabr\u00e1nit z\u00e1va\u017en\u011bj\u0161\u00edm poruch\u00e1m a prodlou\u017eit \u017eivotnost transform\u00e1toru.<\/p><p><\/p><h2 class=\"wp-block-heading\">Jak\u00fd je rozd\u00edl mezi zkou\u0161kou tan delta a m\u011b\u0159en\u00edm megohmetrem?<\/h2><p>Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t transform\u00e1toru a zkou\u0161ka izola\u010dn\u00edho odporu transform\u00e1toru jsou dv\u011b odli\u0161n\u00e9 metody elektrick\u00e9ho testov\u00e1n\u00ed. N\u00e1sleduje vysv\u011btlen\u00ed rozd\u00edl\u016f mezi t\u011bmito dv\u011bma metodami z hlediska \u00fa\u010delu, principu a jednoduch\u00fdch krok\u016f proveden\u00ed.<\/p><p><\/p><h3 class=\"wp-block-heading\"><strong>\u00da\u010del<\/strong><\/h3><p>Zkou\u0161ka izola\u010dn\u00edho odporu se pou\u017e\u00edv\u00e1 p\u0159edev\u0161\u00edm k posouzen\u00ed izola\u010dn\u00edch vlastnost\u00ed vinut\u00ed transform\u00e1toru a jeho sou\u010d\u00e1st\u00ed v\u016f\u010di zemi nebo navz\u00e1jem. Na z\u00e1klad\u011b nam\u011b\u0159en\u00e9 hodnoty izola\u010dn\u00edho odporu lze posoudit, zda je izola\u010dn\u00ed materi\u00e1l vlhk\u00fd, zda st\u00e1rne nebo zda se vyskytuj\u00ed probl\u00e9my, jako jsou \u010d\u00e1ste\u010dn\u00e9 v\u00fdboje.<\/p><p>Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t (zkou\u0161ka tan\u03b4): Slou\u017e\u00ed k posouzen\u00ed celkov\u00e9ho stavu izolace transform\u00e1toru, zejm\u00e9na kapacity a svodov\u00e9ho proudu vinut\u00ed. Hodnota dielektrick\u00fdch ztr\u00e1t odr\u00e1\u017e\u00ed m\u00edru ztr\u00e1ty izola\u010dn\u00edho materi\u00e1lu a obvykle se pou\u017e\u00edv\u00e1 k detekci zhor\u0161en\u00ed izolace a jev\u016f \u010d\u00e1ste\u010dn\u00fdch v\u00fdboj\u016f.<\/p><h3 class=\"wp-block-heading\"><strong>Z\u00e1sada<\/strong><\/h3><p>Zkou\u0161ka izola\u010dn\u00edho odporu: Hodnota izola\u010dn\u00edho odporu se vypo\u010d\u00edt\u00e1 tak, \u017ee se p\u0159ivede stejnosm\u011brn\u00e9 nap\u011bt\u00ed (nap\u0159. 500 V) a zm\u011b\u0159\u00ed se svodov\u00fd proud b\u011bhem ur\u010dit\u00e9ho \u010dasov\u00e9ho \u00faseku (obvykle 1 minuta). \u010c\u00edm vy\u0161\u0161\u00ed je hodnota izola\u010dn\u00edho odporu, t\u00edm lep\u0161\u00ed je izola\u010dn\u00ed v\u00fdkon.<\/p><p>Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t: Po p\u0159ipojen\u00ed st\u0159\u00eddav\u00e9ho nap\u011bt\u00ed o pr\u016fmyslov\u00e9 frekvenci (nap\u0159. 10 kV) se zm\u011b\u0159\u00ed svodov\u00fd proud mezi vinut\u00edmi transform\u00e1toru nebo svodov\u00fd proud vinut\u00ed v\u016f\u010di zemi, aby bylo mo\u017en\u00e9 vypo\u010d\u00edtat hodnotu dielektrick\u00fdch ztr\u00e1t. Hodnota dielektrick\u00fdch ztr\u00e1t je d\u016fle\u017eit\u00fd parametr odr\u00e1\u017eej\u00edc\u00ed kvalitu izolace; za norm\u00e1ln\u00edch okolnost\u00ed by m\u011bla b\u00fdt n\u00edzk\u00e1.<\/p><h3 class=\"wp-block-heading\"><strong>Postup proveden\u00ed<\/strong><\/h3><p>Zkou\u0161ka izola\u010dn\u00edho odporu: p\u0159ipojte megohmmetr k transform\u00e1toru mezi \u010d\u00e1st pod nap\u011bt\u00edm a pl\u00e1\u0161\u0165, p\u0159ive\u010fte stejnosm\u011brn\u00e9 nap\u011bt\u00ed p\u0159ibli\u017en\u011b 500 V a po 1 minut\u011b od p\u0159iveden\u00ed nap\u011bt\u00ed ode\u010dt\u011bte hodnotu izola\u010dn\u00edho odporu. U transform\u00e1tor\u016f s vysok\u00fdm jmenovit\u00fdm nap\u011bt\u00edm m\u016f\u017ee b\u00fdt nutn\u00e9 pou\u017e\u00edt megohmmetr s vy\u0161\u0161\u00edm nap\u011bt\u00edm (nap\u0159. 5 000 V).<\/p><p>Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t: Po zkratov\u00e1n\u00ed zkou\u0161en\u00fdch vinut\u00ed na zem a jejich \u00fapln\u00e9m vybit\u00ed se p\u0159ipoj\u00ed odpov\u00eddaj\u00edc\u00ed st\u0159\u00eddav\u00e9 nap\u011bt\u00ed (nap\u0159. 10 kV) a zm\u011b\u0159\u00ed se svodov\u00fd proud. Zkou\u0161ka se obvykle prov\u00e1d\u00ed p\u0159i r\u016fzn\u00fdch teplot\u00e1ch a hodnoty tan\u03b4 p\u0159i r\u016fzn\u00fdch teplot\u00e1ch se p\u0159epo\u010d\u00edt\u00e1vaj\u00ed podle vzorce.<\/p><h2 class=\"wp-block-heading\">V\u00fdhoda zkou\u0161ky tan delta pomoc\u00ed p\u0159\u00edstroje Transformer oproti zkou\u0161ce pomoc\u00ed meggera<\/h2><p>Ve srovn\u00e1n\u00ed s m\u011b\u0159en\u00edm izola\u010dn\u00edho odporu transform\u00e1toru, , <strong>Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t transform\u00e1toru m\u00e1 oproti zkou\u0161ce izola\u010dn\u00edho odporu transform\u00e1toru n\u00e1sleduj\u00edc\u00ed v\u00fdhody:<\/strong><\/p><h3 class=\"wp-block-heading\"><strong>Vy\u0161\u0161\u00ed citlivost:<\/strong><\/h3><p>Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t umo\u017e\u0148uje \u00fa\u010dinn\u011bji zjistit celkov\u00fd stav izolace transform\u00e1toru, zejm\u00e9na pak drobn\u00e9 vady a zhor\u0161en\u00ed izolace. M\u016f\u017ee nap\u0159\u00edklad odr\u00e1\u017eet energetick\u00e9 ztr\u00e1ty izola\u010dn\u00edho m\u00e9dia pod vlivem st\u0159\u00eddav\u00e9ho elektrick\u00e9ho pole, \u010d\u00edm\u017e poskytuje podrobn\u011bj\u0161\u00ed informace o stavu izolace.<\/p><h3 class=\"wp-block-heading\"><strong>Nen\u00ed ovlivn\u011bno zku\u0161ebn\u00edm nap\u011bt\u00edm, velikost\u00ed vzorku ani dal\u0161\u00edmi faktory<\/strong><\/h3><p>Hodnota dielektrick\u00fdch ztr\u00e1t nesouvis\u00ed s m\u011b\u0159ic\u00edm nap\u011bt\u00edm, velikost\u00ed vzorku ani s dal\u0161\u00edmi faktory, d\u00edky \u010demu\u017e jsou v\u00fdsledky zkou\u0161ky dielektrick\u00fdch ztr\u00e1t stabiln\u011bj\u0161\u00ed a spolehliv\u011bj\u0161\u00ed a usnad\u0148uj\u00ed posouzen\u00ed zm\u011bny izola\u010dn\u00edch vlastnost\u00ed elektrick\u00fdch za\u0159\u00edzen\u00ed.<\/p><h3 class=\"wp-block-heading\"><strong>Vysok\u00fd stupe\u0148 automatizace<\/strong><\/h3><p>Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t m\u016f\u017ee spo\u010d\u00edvat v po\u010d\u00edta\u010dov\u011b podporovan\u00e9 anal\u00fdze dat, odb\u011bru vzork\u016f a anal\u00fdze pr\u016fb\u011bh\u016f proudu a nap\u011bt\u00ed v transform\u00e1toru, na z\u00e1klad\u011b \u010deho\u017e se stanov\u00ed hodnota dielektrick\u00fdch ztr\u00e1t. Tento proces je jednoduch\u00fd a lze jej automatizovat; je praktick\u00fd a rychl\u00fd.<\/p><h3 class=\"wp-block-heading\"><strong>P\u0159i m\u011b\u0159en\u00ed izola\u010dn\u00edho odporu je obt\u00ed\u017en\u00e9 odhalit p\u0159\u00ed\u010dinu probl\u00e9mu<\/strong><\/h3><p>&nbsp;Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t dok\u00e1\u017ee odhalit n\u011bkter\u00e9 probl\u00e9my, kter\u00e9 zkou\u0161ka izola\u010dn\u00edho odporu nedok\u00e1\u017ee zjistit, jako jsou \u010d\u00e1ste\u010dn\u00e9 v\u00fdboje, zm\u011bny kapacity a st\u00e1rnut\u00ed izolace. Tyto probl\u00e9my se kvantifikuj\u00ed a diagnostikuj\u00ed m\u011b\u0159en\u00edm faktoru dielektrick\u00fdch ztr\u00e1t.<\/p><p>Konkr\u00e9tn\u011b lze pomoc\u00ed zkou\u0161ky tangens delta u transform\u00e1toru odhalit n\u00e1sleduj\u00edc\u00ed probl\u00e9my:<\/p><p><strong>\u010c\u00e1ste\u010dn\u00e9 v\u00fdboje:<\/strong> Jeliko\u017e je zkou\u0161ka dielektrick\u00fdch ztr\u00e1t zalo\u017eena na detekci v\u00fdboj\u016f v za\u0159\u00edzen\u00ed, lze t\u00edmto zp\u016fsobem \u00fa\u010dinn\u011b detekovat jev \u010d\u00e1ste\u010dn\u00fdch v\u00fdboj\u016f.<\/p><p><strong>Zm\u011bny kapacity:<\/strong>&nbsp;Zkou\u0161ka dielektrick\u00fdch ztr\u00e1t slou\u017e\u00ed k posouzen\u00ed stavu izolace transform\u00e1tor\u016f a pr\u016fchodek prost\u0159ednictv\u00edm m\u011b\u0159en\u00ed kapacity a faktoru dielektrick\u00fdch ztr\u00e1t, co\u017e m\u016f\u017ee pomoci odhalit zm\u011bny kapacity.<\/p><p><strong>St\u00e1rnut\u00ed izolace:&nbsp;<\/strong>Izola\u010dn\u00ed materi\u00e1ly v pr\u016fb\u011bhu \u010dasu st\u00e1rnou, co\u017e vede ke zv\u00fd\u0161en\u00ed hodnot dielektrick\u00fdch ztr\u00e1t. Tyto zm\u011bny lze v\u010das odhalit a \u0159e\u0161it pomoc\u00ed zkou\u0161ek dielektrick\u00fdch ztr\u00e1t.<\/p><p>Zkou\u0161ka izola\u010dn\u00edho odporu transform\u00e1toru m\u00e1 omezenou citlivost a detek\u010dn\u00ed rozsah, i kdy\u017e dok\u00e1\u017ee odhalit vlhkost v izolaci transform\u00e1toru jako celku, vlhkost nebo ne\u010distoty na vn\u011bj\u0161\u00edm povrchu sou\u010d\u00e1st\u00ed a pronikaj\u00edc\u00ed i lokalizovan\u00e9 vady (nap\u0159. praskl\u00e9 izol\u00e1tory, vodi\u010de v kontaktu s pl\u00e1\u0161t\u011bm atd.).<\/p><p>Kombinovan\u00e9 pou\u017eit\u00ed m\u011b\u0159en\u00ed dielektrick\u00fdch ztr\u00e1t a m\u011b\u0159en\u00ed izola\u010dn\u00edho odporu proto umo\u017e\u0148uje komplexn\u011bj\u0161\u00ed posouzen\u00ed stavu izolace transform\u00e1toru, \u010d\u00edm\u017e se zajist\u00ed jeho bezpe\u010dn\u00fd a spolehliv\u00fd provoz.<\/p><h2 class=\"wp-block-heading\"><strong>Tester tan delta transform\u00e1toru <\/strong><\/h2><figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"577\" height=\"577\" src=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/02\/Transformer-Tan-Delta-Tester.jpg\" alt=\"\" class=\"wp-image-4210\" style=\"width:374px;height:auto\" srcset=\"https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/02\/Transformer-Tan-Delta-Tester.jpg 577w, https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/02\/Transformer-Tan-Delta-Tester-500x500.jpg 500w, https:\/\/kvhipot.com\/wp-content\/uploads\/2024\/02\/Transformer-Tan-Delta-Tester-100x100.jpg 100w\" sizes=\"(max-width: 577px) 100vw, 577px\" \/><\/figure><p>Tester tan delta pro transform\u00e1tory m\u00e1 \u0161irok\u00e9 uplatn\u011bn\u00ed v energetice a pou\u017e\u00edv\u00e1 se p\u0159edev\u0161\u00edm k m\u011b\u0159en\u00ed tangenty dielektrick\u00fdch ztr\u00e1t (tan\u03b4) a kapacity (Cx) vysokonap\u011b\u0165ov\u00fdch energetick\u00fdch za\u0159\u00edzen\u00ed, jako jsou transform\u00e1tory, transform\u00e1tory proudov\u00fdch transform\u00e1tor\u016f (CT), pr\u016fchodky, kondenz\u00e1tory a p\u0159ep\u011b\u0165ov\u00e9 odvodi\u010de. Tyto parametry jsou nezbytn\u00e9 pro posouzen\u00ed izola\u010dn\u00edch vlastnost\u00ed za\u0159\u00edzen\u00ed.<\/p><p><strong>Rozsah pou\u017eit\u00ed testeru tan delta pro transform\u00e1tory <\/strong>se pou\u017e\u00edv\u00e1 v elektr\u00e1rn\u00e1ch a rozvodn\u00e1ch p\u0159\u00edmo na m\u00edst\u011b nebo v laborato\u0159i k vysoce p\u0159esn\u00e9mu m\u011b\u0159en\u00ed tangenty dielektrick\u00fdch ztr\u00e1t a kapacity r\u016fzn\u00fdch vysokonap\u011b\u0165ov\u00fdch za\u0159\u00edzen\u00ed, jako jsou izola\u010dn\u00ed pr\u016fchodky transform\u00e1tor\u016f, kabely, nadzemn\u00ed veden\u00ed a dal\u0161\u00ed vysokonap\u011b\u0165ov\u00e1 za\u0159\u00edzen\u00ed.<\/p><p><strong>Vlastnosti transform\u00e1toru <a href=\"https:\/\/kvhipot.com\/cs\/produkt\/transformer-dissipation-factor-capacitance-tester\/\">tan delta KV-6000A<\/a><\/strong><\/p><ul><li>Sou\u010d\u00e1st\u00ed soustavy je m\u016fstek pro m\u011b\u0159en\u00ed dielektrick\u00fdch ztr\u00e1t, nap\u00e1jec\u00ed zdroj s frekven\u010dn\u00ed konverz\u00ed, zku\u0161ebn\u00ed transform\u00e1tor a vysoce stabiln\u00ed etalonov\u00fd kondenz\u00e1tor s plnem SF\u2086.<\/li>\n\n<li>K eliminaci ru\u0161en\u00ed zp\u016fsoben\u00e9ho elektrick\u00fdm polem s\u00ed\u0165ov\u00e9 frekvence se vyu\u017e\u00edv\u00e1 technologie digit\u00e1ln\u00edho v\u00fd\u0159ezu.<\/li>\n\n<li>Vysokonap\u011b\u0165ov\u00fd zdroj je generov\u00e1n intern\u011b pomoc\u00ed m\u011bni\u010de a p\u0159ed p\u0159ipojen\u00edm k testovan\u00e9mu objektu je nap\u011bt\u00ed zv\u00fd\u0161eno transform\u00e1torem.<\/li>\n\n<li>Nab\u00edz\u00ed \u0159adu ochrann\u00fdch funkc\u00ed proti kol\u00eds\u00e1n\u00ed vstupn\u00edho nap\u011bt\u00ed, zkrat\u016fm na v\u00fdstupu, p\u0159ep\u011bt\u00ed, nadproudu a p\u0159eh\u0159\u00e1t\u00ed, \u010d\u00edm\u017e zaji\u0161\u0165uje bezpe\u010dnost a spolehlivost. Sou\u010d\u00e1st\u00ed je tak\u00e9 funkce kontroly uzemn\u011bn\u00ed, kter\u00e1 zabra\u0148uje zv\u00fd\u0161en\u00ed nap\u011bt\u00ed v neuzemn\u011bn\u00fdch za\u0159\u00edzen\u00edch.<\/li>\n\n<li>Je vybaven dotykov\u00fdm LCD displejem s p\u0159ehledn\u00fdm anglick\u00fdm menu.<\/li>\n\n<li>Umo\u017e\u0148uje ulo\u017eit a\u017e 200 skupin dat a uspo\u0159\u00e1dat v\u00fdsledky test\u016f v chronologick\u00e9m po\u0159ad\u00ed, co\u017e usnad\u0148uje jejich vyhled\u00e1v\u00e1n\u00ed a tisk.<\/li>\n\n<li>Mezi univerz\u00e1ln\u00ed re\u017eimy testov\u00e1n\u00ed pat\u0159\u00ed intern\u00ed vysok\u00e9 nap\u011bt\u00ed, extern\u00ed vysok\u00e9 nap\u011bt\u00ed, intern\u00ed standard, extern\u00ed standard, GST\/UST a samosn\u00ed\u017een\u00ed. Zkou\u0161ky dielektrick\u00fdch ztr\u00e1t p\u0159i vysok\u00e9m nap\u011bt\u00ed (nad 12 kV) lze prov\u00e1d\u011bt pomoc\u00ed nastaven\u00ed extern\u00edho standardu a extern\u00edho vysok\u00e9ho nap\u011bt\u00ed.<\/li>\n\n<li>Umo\u017e\u0148uje soub\u011b\u017en\u00e9 m\u011b\u0159en\u00ed dielektrick\u00fdch ztr\u00e1t a kapacity kondenz\u00e1tor\u016f C1 i C2 v pln\u011b ut\u011bsn\u011bn\u00fdch kapacitn\u00edch nap\u011b\u0165ov\u00fdch transform\u00e1torech (CVT), jako\u017e i stanoven\u00ed p\u0159evodn\u00edho pom\u011bru CVT a rozd\u00edlu f\u00e1zov\u00e9ho \u00fahlu nap\u011bt\u00ed.<\/li>\n\n<li>Umo\u017e\u0148uje p\u0159esn\u00e9 m\u011b\u0159en\u00ed hodnot dielektrick\u00fdch ztr\u00e1t a kapacity CVT bez nutnosti odpojen\u00ed vysokonap\u011b\u0165ov\u00e9ho vodi\u010de CVT.<\/li>\n\n<li>K m\u011b\u0159en\u00ed dielektrick\u00fdch ztr\u00e1t a hodnoty kapacity C0 na horn\u00edm konci CVT vyu\u017e\u00edv\u00e1 metodu reverzn\u00edho st\u00edn\u011bn\u00ed.<\/li>\n\n<li>Zahrnuje vysokorychlostn\u00ed vzorkov\u00e1n\u00ed sign\u00e1lu s digit\u00e1ln\u011b \u0159\u00edzen\u00fdm invertorem a vzorkovac\u00edm obvodem. V\u00fdstupn\u00ed nap\u011bt\u00ed je plynule nastaviteln\u00e9.<\/li><\/ul><p><\/p><p><strong>Tester tan delta pro transform\u00e1tory je kl\u00ed\u010dov\u00fdm diagnostick\u00fdm n\u00e1strojem pro posouzen\u00ed stavu izolace v transform\u00e1torech.<\/strong><\/p><p><strong>1. Posouzen\u00ed stavu izolace<\/strong><\/p><p>Zkou\u0161ka tan delta se pou\u017e\u00edv\u00e1 p\u0159edev\u0161\u00edm k posouzen\u00ed kvality izolace transform\u00e1toru. M\u011b\u0159en\u00edm ztr\u00e1tov\u00e9ho faktoru (tan \u03b4) pom\u00e1h\u00e1 odhalit p\u0159\u00edpadn\u00e1 slab\u00e1 m\u00edsta izolace, vady nebo zhor\u0161en\u00ed stavu v d\u016fsledku st\u00e1rnut\u00ed, vniknut\u00ed vlhkosti \u010di zne\u010di\u0161t\u011bn\u00ed.<\/p><p><strong>2. Diagnostick\u00e9 testy<\/strong><\/p><p>Tento test umo\u017e\u0148uje sledovat stav izolace v pr\u016fb\u011bhu \u010dasu. Porovn\u00e1n\u00edm hodnot tan delta z po sob\u011b jdouc\u00edch test\u016f mohou technici odhalit postupn\u00e9 zhor\u0161ov\u00e1n\u00ed stavu a v\u010das napl\u00e1novat \u00fadr\u017ebu \u010di opravy, \u010d\u00edm\u017e p\u0159edejdou neo\u010dek\u00e1van\u00fdm poruch\u00e1m.<\/p><p><strong>3. Kontrola kvality b\u011bhem v\u00fdroby<\/strong><\/p><p>P\u0159i v\u00fdrob\u011b transform\u00e1tor\u016f se \u010dasto prov\u00e1d\u00ed m\u011b\u0159en\u00ed tan delta, aby se zajistila integrita a kvalita izola\u010dn\u00edho syst\u00e9mu. To pom\u00e1h\u00e1 odhalit p\u0159\u00edpadn\u00e9 probl\u00e9my je\u0161t\u011b p\u0159ed uveden\u00edm transform\u00e1toru do provozu.<\/p><p><strong>4. Hodnocen\u00ed sou\u010d\u00e1st\u00ed transform\u00e1toru<\/strong><\/p><p>Toto testov\u00e1n\u00ed lze prov\u00e1d\u011bt na r\u016fzn\u00fdch sou\u010d\u00e1stech transform\u00e1toru, v\u010detn\u011b vinut\u00ed, pr\u016fchodek a kabel\u016f. Pom\u00e1h\u00e1 posoudit stav izolace t\u011bchto sou\u010d\u00e1st\u00ed a poskytuje informace o jejich provozn\u00ed spolehlivosti.<\/p><p><strong>5. Anal\u00fdza trend\u016f pro prediktivn\u00ed \u00fadr\u017ebu<\/strong><\/p><p>Pravideln\u00e9 testov\u00e1n\u00ed tan delta usnad\u0148uje anal\u00fdzu trend\u016f a umo\u017e\u0148uje obsluze sledovat zm\u011bny stavu izolace v pr\u016fb\u011bhu \u010dasu. Tento p\u0159\u00edstup zalo\u017een\u00fd na prediktivn\u00ed \u00fadr\u017eb\u011b pom\u00e1h\u00e1 pl\u00e1novat z\u00e1sahy je\u0161t\u011b p\u0159ed vznikem z\u00e1va\u017en\u00fdch probl\u00e9m\u016f, \u010d\u00edm\u017e zvy\u0161uje spolehlivost provozu transform\u00e1tor\u016f.<\/p><p><strong>6. Dodr\u017eov\u00e1n\u00ed norem<\/strong><\/p><p>Testov\u00e1n\u00ed tan delta pom\u00e1h\u00e1 zajistit soulad s pr\u016fmyslov\u00fdmi normami (jako jsou IEC a IEEE) pro izolaci transform\u00e1tor\u016f. V\u00fdsledky lze porovnat se stanoven\u00fdmi prahov\u00fdmi hodnotami, aby se zjistilo, zda se izolace nach\u00e1z\u00ed v p\u0159ijateln\u00fdch mez\u00edch, \u010d\u00edm\u017e se podporuje dodr\u017eov\u00e1n\u00ed p\u0159edpis\u016f a bezpe\u010dnost.<\/p><p>M\u011b\u0159i\u010d tan delta pro transform\u00e1tory dok\u00e1\u017ee nejen \u00fa\u010dinn\u011b posoudit stav izolace za\u0159\u00edzen\u00ed, ale tak\u00e9 poskytuje v\u011bdeck\u00fd z\u00e1klad pro \u00fadr\u017ebu a gener\u00e1ln\u00ed opravy. D\u00edky sv\u00e9 vysok\u00e9 p\u0159esnosti, siln\u00e9 odolnosti proti ru\u0161en\u00ed a snadn\u00e9mu ovl\u00e1d\u00e1n\u00ed je nepostradateln\u00fdm m\u011b\u0159ic\u00edm n\u00e1strojem v energetick\u00e9m pr\u016fmyslu.<\/p>","protected":false},"excerpt":{"rendered":"<p>Zkou\u0161ka tan delta, zn\u00e1m\u00e1 tak\u00e9 jako zkou\u0161ka ztr\u00e1tov\u00e9ho faktoru (PF),\u00a0nebo testov\u00e1n\u00ed ztr\u00e1tov\u00e9ho \u00fahlu \u010di dielektrick\u00e9ho ztr\u00e1tov\u00e9ho faktoru (DDF), je diagnostick\u00e1 metoda pou\u017e\u00edvan\u00e1 k m\u011b\u0159en\u00ed dielektrick\u00e9ho ztr\u00e1tov\u00e9ho faktoru (tg\u03b4) a kapacity (Cx) a k hodnocen\u00ed stavu izolace elektrick\u00fdch za\u0159\u00edzen\u00ed, jako jsou kabely, transform\u00e1tory, kondenz\u00e1tory a rotuj\u00edc\u00ed stroje.<\/p>","protected":false},"author":1,"featured_media":4487,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/posts\/4739"}],"collection":[{"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/comments?post=4739"}],"version-history":[{"count":0,"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/posts\/4739\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/media\/4487"}],"wp:attachment":[{"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/media?parent=4739"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/categories?post=4739"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kvhipot.com\/cs\/wp-json\/wp\/v2\/tags?post=4739"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}