{"id":789,"date":"2026-09-08T04:14:10","date_gmt":"2026-09-08T04:14:10","guid":{"rendered":"https:\/\/ritoks.com\/?p=789"},"modified":"2026-10-11T00:44:30","modified_gmt":"2026-10-11T00:44:30","slug":"current-transformer-selection-guide","status":"publish","type":"post","link":"https:\/\/ritoks.com\/cs\/current-transformer-selection-guide\/","title":{"rendered":"Pr\u016fvodce v\u00fdb\u011brem proudov\u00fdch transform\u00e1tor\u016f: konstrukce, p\u0159enosov\u00fd pom\u011br, v\u00fdstup a ov\u011b\u0159en\u00ed modelu"},"content":{"rendered":"<p class=\"wp-block-paragraph\">V\u00fdb\u011br proudov\u00e9ho transform\u00e1toru vych\u00e1z\u00ed z m\u011b\u0159ic\u00edch po\u017eadavk\u016f, nikoli pouze z \u010d\u00edsla modelu. P\u0159ed objedn\u00e1n\u00edm by kupuj\u00edc\u00ed m\u011bli ur\u010dit konstruk\u010dn\u00ed proveden\u00ed, po\u017eadavky na prim\u00e1rn\u00ed proud, sekund\u00e1rn\u00ed v\u00fdstup, p\u0159evodov\u00fd pom\u011br, vhodnost pro danou instalaci, po\u017eadavky na p\u0159esnost, p\u0159\u00edpadn\u011b z\u00e1t\u011b\u017e, frekvenci, po\u017eadavky na izolaci a p\u0159esn\u00fd rozsah pot\u0159ebn\u00e9 dokumentace.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tento pr\u016fvodce v\u00fdb\u011brem proudov\u00fdch transform\u00e1tor\u016f odd\u011bluje obecn\u00e9 kroky ov\u011b\u0159en\u00ed od zve\u0159ejn\u011bn\u00fdch \u00fadaj\u016f o produktech spole\u010dnosti RITOKS. Nevypo\u010d\u00edt\u00e1v\u00e1 pom\u011br, zat\u00ed\u017een\u00ed ani nastaven\u00ed ochrany a nenahrazuje technick\u00e9 poradenstv\u00ed ani dokumentaci k konkr\u00e9tn\u00edmu modelu.<\/p>\n\n\n\n<figure data-spectra-id=\"spectra-cba6dda6-6a6b-48f8-a7be-dbd5b58d0715\" class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" height=\"2048\" width=\"2048\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1.png\" alt=\"Proudov\u00fd transform\u00e1tor s d\u011blen\u00fdm j\u00e1drem \u0159ady DP pro monitorov\u00e1n\u00ed pr\u016fmyslov\u00e9ho nap\u00e1jen\u00ed\" class=\"wp-image-413\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1.png 2048w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-300x300.png 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-100x100.png 100w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-600x600.png 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1024x1024.png 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-150x150.png 150w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-768x768.png 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1536x1536.png 1536w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><figcaption class=\"wp-element-caption\">Representative DP Series split-core current transformer. Published output, burden, frequency, insulation and mechanical details must be confirmed for the exact model.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">V\u00fdb\u011br proudov\u00fdch transform\u00e1tor\u016f v kostce<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">U\u017eite\u010dn\u00e1 specifikace vych\u00e1z\u00ed z po\u017eadavk\u016f aplikace, pokra\u010duje konstrukc\u00ed CT a elektrick\u00fdm rozhran\u00edm a kon\u010d\u00ed popisem fyzick\u00e9ho uspo\u0159\u00e1d\u00e1n\u00ed a dokumentac\u00ed p\u0159esn\u00e9ho modelu. Obecn\u00e1 terminologie je pops\u00e1na v ofici\u00e1ln\u00edch technick\u00fdch materi\u00e1lech od <a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FA335683\/\" target=\"_blank\" rel=\"noopener\">Schneider Electric<\/a>, jeho <a href=\"https:\/\/www.se.com\/us\/en\/download\/document\/Z207506\/\" target=\"_blank\" rel=\"noopener\">Instala\u010dn\u00ed dokumentace k transform\u00e1toru s d\u011blen\u00fdm j\u00e1drem<\/a>, a <a href=\"https:\/\/emea.socomec.com\/sites\/default\/files\/2024-11\/CURRENT-SENSORS-AND-TRANSFORMERS_SELECTION-GUIDE_2024-11_DCG0160201EN_EN_0.pdf\" target=\"_blank\" rel=\"noopener\">Pr\u016fvodce v\u00fdb\u011brem proudov\u00fdch sn\u00edma\u010d\u016f a transform\u00e1tor\u016f spole\u010dnosti Socomec<\/a>. Tyto zdroje slou\u017e\u00ed pouze k obecn\u00e9mu sezn\u00e1men\u00ed; jejich hodnocen\u00ed a doporu\u010den\u00ed nep\u0159edstavuj\u00ed technick\u00e9 specifikace v\u00fdrobk\u016f spole\u010dnosti RITOKS.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Vstupn\u00ed parametry pro v\u00fdb\u011br proudov\u00e9ho transform\u00e1toru<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Zad\u00e1n\u00ed v\u00fdb\u011bru<\/th><th>Co je t\u0159eba ov\u011b\u0159it<\/th><\/tr><\/thead><tbody>\n<tr><td>Konstrukce CT<\/td><td>Konstrukce s d\u011blen\u00fdm j\u00e1drem, uzav\u0159en\u00fdm j\u00e1drem nebo miniaturn\u00ed, jak to vy\u017eaduje dan\u00e1 instalace<\/td><\/tr>\n<tr><td>Proudov\u00e1 spot\u0159eba v prim\u00e1rn\u00edm obvodu<\/td><td>Rozsah proudu projektu a zve\u0159ejn\u011bn\u00e1 hodnota prim\u00e1rn\u00edho proudu pro konkr\u00e9tn\u00ed model<\/td><\/tr>\n<tr><td>Sekund\u00e1rn\u00ed v\u00fdstup<\/td><td>Po\u017eadovan\u00e9 vstupn\u00ed \u00fadaje pro p\u0159ipojen\u00fd m\u011b\u0159i\u010d nebo monitorovac\u00ed za\u0159\u00edzen\u00ed<\/td><\/tr>\n<tr><td>Pom\u011br<\/td><td>Zve\u0159ejn\u011bn\u00fd vztah mezi prim\u00e1rn\u00ed a sekund\u00e1rn\u00ed veli\u010dinou pro p\u0159esn\u00fd model<\/td><\/tr>\n<tr><td>P\u0159izp\u016fsoben\u00ed vodi\u010de \/ otvoru<\/td><td>Rozm\u011bry vodi\u010de nebo p\u0159\u00edpojnice ve srovn\u00e1n\u00ed s uveden\u00fdm otvorem<\/td><\/tr>\n<tr><td>P\u0159\u00edstup k instalaci<\/td><td>Zda lze vodi\u010d odpojit, nebo zda mus\u00ed z\u016fstat na sv\u00e9m m\u00edst\u011b<\/td><\/tr>\n<tr><td>Mont\u00e1\u017e<\/td><td>Dostupn\u00fd prostor, zp\u016fsob mont\u00e1\u017ee a po\u017eadavky na v\u00fdvody<\/td><\/tr>\n<tr><td>Frekvence<\/td><td>Po\u017eadovan\u00e1 provozn\u00ed frekvence a zve\u0159ejn\u011bn\u00ed p\u0159esn\u00e9ho modelu<\/td><\/tr>\n<tr><td>Po\u017eadavek na p\u0159esnost<\/td><td>Po\u017eadovan\u00e1 terminologie a p\u0159esn\u00e9 ozna\u010den\u00ed t\u0159\u00eddy \u010di v\u00fdkonnostn\u00ed kategorie, jak byly zve\u0159ejn\u011bny<\/td><\/tr>\n<tr><td>Z\u00e1t\u011b\u017e<\/td><td>Platn\u00e9 po\u017eadavky VA a p\u0159esn\u00fd \u0159\u00e1dek, ve kter\u00e9m byly zve\u0159ejn\u011bny<\/td><\/tr>\n<tr><td>Izolace \/ odolnost<\/td><td>Po\u017eadavky na projekt a dokumentace p\u0159esn\u00e9ho modelu<\/td><\/tr>\n<tr><td>P\u0159esn\u00fd model<\/td><td>Kompletn\u00ed konfigurace p\u0159\u00edpon, variant a po\u0159ad\u00ed<\/td><\/tr>\n<tr><td>Technick\u00fd list \/ dokumentace<\/td><td>Po\u017eadovan\u00e9 elektrotechnick\u00e9, mechanick\u00e9 a normativn\u00ed dokumenty<\/td><\/tr>\n<\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">1. Za\u010dn\u011bte konstrukc\u00ed CT<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Proudov\u00e9 transform\u00e1tory s d\u011blen\u00fdm j\u00e1drem<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">CT s d\u011blen\u00fdm j\u00e1drem lze otev\u0159\u00edt a nainstalovat kolem st\u00e1vaj\u00edc\u00edho vodi\u010de nebo sb\u011brnice. To m\u016f\u017ee b\u00fdt d\u016fle\u017eit\u00e9 v p\u0159\u00edpadech, kdy nen\u00ed mo\u017en\u00e9 vodi\u010d odpojit, av\u0161ak samotn\u00e1 konstrukce neur\u010duje po\u017eadovan\u00fd pom\u011br, v\u00fdstup, p\u0159esnost ani zat\u00ed\u017een\u00ed. <a href=\"https:\/\/ritoks.com\/cs\/products\/dp-series-split-core-current-transformer\/\">Proudov\u00fd transform\u00e1tor s d\u011blen\u00fdm j\u00e1drem \u0159ady DP<\/a> uv\u00e1d\u00ed p\u0159\u00edklad konstrukce RITOKS na z\u00e1klad\u011b dev\u00edti zve\u0159ejn\u011bn\u00fdch referen\u010dn\u00edch model\u016f. \u00dapln\u00e1 konfigurace sekund\u00e1rn\u00edho v\u00fdstupu, zat\u00ed\u017een\u00ed, frekvence, izolace, otvoru a podrobn\u00e9 rozm\u011bry nejsou zve\u0159ejn\u011bny a je nutn\u00e9 je ov\u011b\u0159it.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Proudov\u00e9 transform\u00e1tory s uzav\u0159en\u00fdm j\u00e1drem<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">U CT s uzav\u0159en\u00fdm j\u00e1drem je p\u0159i instalaci nutn\u00e9, aby vodi\u010d proch\u00e1zel jeho otvorem. Kupuj\u00edc\u00ed by proto m\u011bli ov\u011b\u0159it p\u0159\u00edstup pro instalaci i elektrick\u00e9 specifikace. <a href=\"https:\/\/ritoks.com\/cs\/products\/bh-0-66-60i-current-transformer-200-5a-1500-5a\/\">BH-0.66 60I n\u00edzkonap\u011b\u0165ov\u00fd proudov\u00fd transform\u00e1tor<\/a> Jedn\u00e1 se o rodinu s jedn\u00edm j\u00e1drem a uzav\u0159en\u00fdm j\u00e1drem, kter\u00e1 obsahuje jeden\u00e1ct zve\u0159ejn\u011bn\u00fdch \u0159\u00e1dk\u016f s pom\u011brem \/5A. \u00dadaje o p\u0159esn\u00e9m pom\u011bru, t\u0159\u00edd\u011b p\u0159esnosti a z\u00e1t\u011b\u017ei je t\u0159eba vykl\u00e1dat v souvislosti, nikoli libovoln\u011b kombinovat.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Miniaturn\u00ed proudov\u00e9 transform\u00e1tory<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pojem \u201eminiaturn\u00ed\u201c ozna\u010duje kompaktn\u00ed konstrukci; nejedn\u00e1 se o tvrzen\u00ed o vy\u0161\u0161\u00ed p\u0159esnosti ani o univerz\u00e1ln\u00ed pou\u017eitelnosti. Tento <a href=\"https:\/\/ritoks.com\/cs\/products\/gta20l-precision-current-transformer-10a-100a\/\">P\u0159esn\u00fd miniaturn\u00ed proudov\u00fd transform\u00e1tor GTA20L<\/a> uv\u00e1d\u00ed vn\u011bj\u0161\u00ed pr\u016fm\u011br 26 mm, v\u00fd\u0161ku 28,4 mm, otvor 8,5 mm a v\u00fdvody o d\u00e9lce 200 mm. Tyto rozm\u011bry usnad\u0148uj\u00ed ov\u011b\u0159en\u00ed spr\u00e1vnosti mont\u00e1\u017ee, av\u0161ak elektrick\u00e1 pole mus\u00ed b\u00fdt i nad\u00e1le p\u0159izp\u016fsobena konkr\u00e9tn\u00edmu modelu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Stanovte po\u017eadavek na prim\u00e1rn\u00ed proud<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159ed v\u00fdb\u011brem \u0159ady produkt\u016f je t\u0159eba ur\u010dit po\u017eadavky na prim\u00e1rn\u00ed proud dan\u00e9 projektu. Uve\u0159ejn\u011bn\u00fd rozsah proud\u016f ukazuje, co dan\u00e1 \u0159ada nab\u00edz\u00ed; neur\u010duje v\u0161ak, kter\u00fd model syst\u00e9m vy\u017eaduje. Referen\u010dn\u00ed materi\u00e1ly DP uv\u00e1d\u011bj\u00ed maxim\u00e1ln\u00ed rozsahy pom\u011br\u016f uveden\u00e9 dodavateli. \u0158ady BH-0.66 60I pokr\u00fdvaj\u00ed rozsah od 200\/5 A do 1500\/5 A. Modely GTA20L uv\u00e1d\u011bj\u00ed vstupn\u00ed st\u0159\u00eddav\u00fd proud 10\u2013100 A. Jedn\u00e1 se o odli\u0161n\u00e9 struktury produktov\u00fdch \u00fadaj\u016f a nem\u011bly by b\u00fdt pova\u017eov\u00e1ny za zam\u011bniteln\u00e9 v\u00fdb\u011brov\u00e9 z\u00e1sady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. Ov\u011b\u0159te sekund\u00e1rn\u00ed v\u00fdstup a pom\u011br<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pom\u011br CT popisuje vztah mezi prim\u00e1rn\u00edm proudem a sekund\u00e1rn\u00edm v\u00fdstupem u konkr\u00e9tn\u00edho modelu transform\u00e1toru. Nejprve je t\u0159eba definovat po\u017eadavky na prim\u00e1rn\u00ed stranu, ur\u010dit sekund\u00e1rn\u00ed v\u00fdstup po\u017eadovan\u00fd p\u0159ipojen\u00fdm m\u011b\u0159ic\u00edm za\u0159\u00edzen\u00edm, zkontrolovat dostupn\u00fd zve\u0159ejn\u011bn\u00fd pom\u011br a pot\u00e9 ov\u011b\u0159it p\u0159esnou dokumentaci k dan\u00e9mu modelu. T\u00edmto postupem se vyhnete p\u0159edpokladu, \u017ee zn\u00e1m\u00fd z\u00e1pis plat\u00ed pro celou \u0159adu v\u00fdrobk\u016f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">BH-0.66 60I uv\u00e1d\u00ed explicitn\u00ed \u0159ady \/5A. GTA20L uv\u00e1d\u00ed v\u00fdstup 20 mA st\u0159\u00eddav\u00e9ho proudu a mapovan\u00e9 pom\u011bry od 500:1 do 5000:1 u v\u0161ech sv\u00fdch osmi model\u016f. \u0158ada DP neuv\u00e1d\u00ed kompletn\u00ed konfiguraci v\u00fdstupu pro ka\u017edou uvedenou referenci. Proto nelze referenci \/5A zobec\u0148ovat na v\u0161echny transform\u00e1tory RITOKS a model GTA20L nelze prezentovat jako p\u0159\u00edmou n\u00e1hradu za transform\u00e1tor \/5A.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4. Zkontrolujte clonu a instala\u010dn\u00ed prostor<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Porovnejte rozm\u011bry vodi\u010de nebo p\u0159\u00edpojnice s otvorem transform\u00e1toru proudu a pot\u00e9 zkontrolujte dostupn\u00fd prostor, p\u0159\u00edstup k instalaci, zp\u016fsob upevn\u011bn\u00ed a po\u017eadavky na p\u0159\u00edvodn\u00ed vodi\u010de. Model GTA20L m\u00e1 uveden\u00fd otvor 8,5 mm a kompaktn\u00ed rozm\u011bry t\u011bla. Pro \u0159ady DP a BH-0.66 60I nejsou na t\u011bchto str\u00e1nk\u00e1ch uvedeny srovnateln\u00e9 hodnoty otvoru a rozm\u011br\u016f, proto je u t\u011bchto hodnot nutn\u00e9 ov\u011b\u0159it p\u0159esn\u00fd model. Obr\u00e1zky produkt\u016f nejsou d\u016fkazem rozm\u011br\u016f.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure data-spectra-id=\"spectra-cbd01521-5846-4599-8a22-deb4479a2daa\" class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" data-id=\"414\" height=\"800\" width=\"800\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/O1CN01LE4QrA1LnbJIMx9HB_2218734541344-0-cib.jpg\" alt=\"BH-0.66 60I n\u00edzkonap\u011b\u0165ov\u00fd proudov\u00fd transform\u00e1tor\" class=\"wp-image-414\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/O1CN01LE4QrA1LnbJIMx9HB_2218734541344-0-cib.jpg 800w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/O1CN01LE4QrA1LnbJIMx9HB_2218734541344-0-cib-300x300.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/O1CN01LE4QrA1LnbJIMx9HB_2218734541344-0-cib-100x100.jpg 100w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/O1CN01LE4QrA1LnbJIMx9HB_2218734541344-0-cib-600x600.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/O1CN01LE4QrA1LnbJIMx9HB_2218734541344-0-cib-150x150.jpg 150w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/O1CN01LE4QrA1LnbJIMx9HB_2218734541344-0-cib-768x768.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Vizu\u00e1ln\u00ed prezentace produktov\u00e9 \u0159ady BH-0.66 60I s uzav\u0159en\u00fdm j\u00e1drem.<\/figcaption><\/figure>\n\n\n<figure data-spectra-id=\"spectra-9e3e69c4-6bb9-4064-9378-c5487b4ada36\" class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" data-id=\"417\" height=\"2048\" width=\"2048\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1.png\" alt=\"P\u0159esn\u00fd miniaturn\u00ed proudov\u00fd transform\u00e1tor GTA20L\" class=\"wp-image-417\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1.png 2048w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1-300x300.png 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1-100x100.png 100w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1-600x600.png 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1-1024x1024.png 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1-150x150.png 150w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1-768x768.png 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/08\/\u751f\u6210\u4ea7\u54c1\u767d\u5e95\u56fe-1-1-1536x1536.png 1536w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><figcaption class=\"wp-element-caption\">Vizualizace miniaturn\u00edho proudov\u00e9ho transform\u00e1toru GTA20L.<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">5. Ov\u011b\u0159en\u00ed po\u017eadavk\u016f na p\u0159esnost<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159esnost je po\u017eadavek, kter\u00fd je t\u0159eba definovat a ov\u011b\u0159it, nejedn\u00e1 se o pouh\u00e9 hodnocen\u00ed kvality. Str\u00e1nky \u0159ady DP uv\u00e1d\u011bj\u00ed t\u0159\u00eddu 0,5 pouze v p\u0159\u00edpadech, kdy je to v\u00fdslovn\u011b uvedeno. \u0158\u00e1dky BH-0.66 60I zahrnuj\u00ed zve\u0159ejn\u011bn\u00e9 t\u0159\u00eddy 1,0, 0,5, 0,5S, 0,2 a 0,2S, ale jejich dostupnost z\u00e1vis\u00ed na konkr\u00e9tn\u00edm \u0159\u00e1dku. GTA20L pou\u017e\u00edv\u00e1 zve\u0159ejn\u011bnou terminologii f\u00e1zov\u00e9 chyby a linearity nam\u00edsto stejn\u00e9 tabulky t\u0159\u00edd. \u017d\u00e1dn\u00e1 t\u0159\u00edda by nem\u011bla b\u00fdt vyb\u00edr\u00e1na automaticky ani pou\u017e\u00edv\u00e1na k odvozen\u00ed vhodnosti pro fakturaci, m\u011b\u0159en\u00ed v\u00fdnos\u016f nebo ochranu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">6. Zkontrolujte zdroj, kde je informace zve\u0159ejn\u011bna<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Zat\u00ed\u017een\u00ed je specifikace CT, kterou m\u016f\u017ee b\u00fdt nutn\u00e9 ov\u011b\u0159it vzhledem k p\u0159ipojen\u00e9mu m\u011b\u0159ic\u00edmu obvodu, kde je uvedena. BH-0.66 60I uv\u00e1d\u00ed hodnoty 2,5 VA pro \u0159\u00e1dky 200\/5 A a 250\/5 A u zobrazen\u00fdch t\u0159\u00edd 1,0 a 0,5, polo\u017eky 5 VA v p\u0159esn\u00fdch zve\u0159ejn\u011bn\u00fdch \u0159ad\u00e1ch od 300\/5 A do 600\/5 A a polo\u017eky 10 VA v p\u0159esn\u00fdch zve\u0159ejn\u011bn\u00fdch \u0159ad\u00e1ch od 750\/5 A do 1500\/5 A. Tyto hodnoty mus\u00ed z\u016fstat v\u00e1z\u00e1ny na sv\u00e9 zdrojov\u00e9 \u0159ady. Z\u00e1t\u011b\u017e nen\u00ed pro DP zve\u0159ejn\u011bna a r\u00e1mcov\u00e1n\u00ed BH VA by nem\u011blo b\u00fdt p\u0159en\u00e1\u0161eno do GTA20L.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">7. Ov\u011b\u0159te \u00fadaje o frekvenci a izolaci<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V p\u0159\u00edslu\u0161n\u00fdch p\u0159\u00edpadech je t\u0159eba uv\u00e9st po\u017eadavky na frekvenci, izolaci a odolnost. Model GTA20L uv\u00e1d\u00ed frekvenci 50\/60 Hz, izola\u010dn\u00ed odpor vy\u0161\u0161\u00ed ne\u017e 1 000 M\u03a9, nap\u011b\u0165ovou t\u0159\u00eddu 0,66\/0,72 kV a odolnost 4 kV \/ 50 Hz \/ 1 min. Tyto \u00fadaje pro konkr\u00e9tn\u00ed modely neposkytuj\u00ed odpov\u00eddaj\u00edc\u00ed \u00fadaje pro modely DP nebo BH-0,66 60I, u nich\u017e sou\u010dasn\u00e9 str\u00e1nky neuv\u00e1d\u011bj\u00ed \u00fapln\u00e9 specifikace t\u00fdkaj\u00edc\u00ed se frekvence a izolace.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Zve\u0159ejn\u011bn\u00e9 \u0159ady proudov\u00fdch transform\u00e1tor\u016f RITOKS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tento <a href=\"https:\/\/ritoks.com\/cs\/product-category\/electrical-measurement-monitoring\/current-transformers\/\">Kategorie proudov\u00fdch transform\u00e1tor\u016f<\/a> nach\u00e1z\u00ed se uvnit\u0159 <a href=\"https:\/\/ritoks.com\/cs\/product-category\/electrical-measurement-monitoring\/\">Elektrick\u00e1 m\u011b\u0159en\u00ed a monitorov\u00e1n\u00ed<\/a>. N\u00ed\u017ee uveden\u00fd p\u0159ehled slou\u017e\u00ed pouze pro orienta\u010dn\u00ed p\u0159ehled. Pro sousedn\u00ed, av\u0161ak neekvivalentn\u00ed m\u011b\u0159ic\u00ed architektury porovnejte <a href=\"https:\/\/ritoks.com\/cs\/product-category\/electrical-measurement-monitoring\/rogowski-coils\/\">Rogowsk\u00e9ho c\u00edvky<\/a> jako nap\u0159\u00edklad <a href=\"https:\/\/ritoks.com\/cs\/products\/zrc-flexible-rogowski-coils-600a-3000a\/\">Rodina ZRC<\/a>, <a href=\"https:\/\/ritoks.com\/cs\/product-category\/electrical-measurement-monitoring\/hall-current-sensors\/\">Sn\u00edma\u010de proudu v chodb\u011b<\/a> jako nap\u0159\u00edklad <a href=\"https:\/\/ritoks.com\/cs\/products\/hs2v-h02-open-loop-hall-current-sensors\/\">\u0158ada HS2V H02<\/a>, a <a href=\"https:\/\/ritoks.com\/cs\/product-category\/electrical-measurement-monitoring\/dc-current-transducers\/\">Sn\u00edma\u010de stejnosm\u011brn\u00e9ho proudu<\/a> jako nap\u0159\u00edklad <a href=\"https:\/\/ritoks.com\/cs\/products\/wbi334u01-s-dc-current-transducer-4-20ma\/\">WBI334U01-S<\/a>; jejich principy sn\u00edm\u00e1n\u00ed, v\u00fdstupy a po\u017eadavky na instalaci nejsou vz\u00e1jemn\u011b zam\u011bniteln\u00e9.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Zve\u0159ejn\u011bn\u00fd p\u0159ehled \u0159ady proudov\u00fdch transform\u00e1tor\u016f RITOKS<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Rodina<\/th><th>Stavebnictv\u00ed<\/th><th>Zve\u0159ejn\u011bn\u00e9 informace o prim\u00e1rn\u00edm \/ pom\u011bru<\/th><th>Zve\u0159ejn\u011bn\u00e9 sekund\u00e1rn\u00ed v\u00fdstupy<\/th><th>Pole p\u0159esnosti \/ v\u00fdkonu<\/th><th>Technick\u00e9 \u00fadaje<\/th><th>Kl\u00ed\u010dov\u00e9 \u00fadaje k ov\u011b\u0159en\u00ed<\/th><\/tr><\/thead><tbody>\n<tr><td>\u0158ada DP<\/td><td>Rozd\u011blen\u00e9 j\u00e1dro<\/td><td>Dev\u011bt odkaz\u016f s rozmez\u00edmi maxim\u00e1ln\u00edch pom\u011br\u016f uveden\u00fdmi dodavatelem<\/td><td>Kompletn\u00ed konfigurace nebyla zve\u0159ejn\u011bna<\/td><td>T\u0159\u00edda 0,5 pouze v p\u0159\u00edpad\u011b, \u017ee je v\u00fdslovn\u011b uvedena<\/td><td>Nezve\u0159ejn\u011bno<\/td><td>V\u00fdkon, zat\u00ed\u017een\u00ed, frekvence, izolace, otvor, rozm\u011bry, upevn\u011bn\u00ed a dokumentace<\/td><\/tr>\n<tr><td>BH-0,66 60I<\/td><td>S uzav\u0159en\u00fdm j\u00e1drem, n\u00edzkonap\u011b\u0165ov\u00fd, jedno\u017eilov\u00fd<\/td><td>Jeden\u00e1ct \u0159ad od 200\/5 A do 1500\/5 A<\/td><td>5A v p\u0159esn\u011b zve\u0159ejn\u011bn\u00fdch \u0159\u00e1dc\u00edch<\/td><td>P\u0159esn\u00e9 p\u0159i\u0159azen\u00ed \u0159\u00e1dk\u016f pro polo\u017eky t\u0159\u00eddy a 2,5 VA, 5 VA nebo 10 VA<\/td><td>Nezve\u0159ejn\u011bno<\/td><td>Rozm\u011bry, frekvence, izolace, mont\u00e1\u017e a dokumentace<\/td><\/tr>\n<tr><td>GTA20L<\/td><td>Miniatura<\/td><td>Osm model\u016f; vstupn\u00ed st\u0159\u00eddav\u00fd proud 10\u2013100 A; mapovan\u00e9 pom\u011bry 500:1\u20135000:1<\/td><td>20 mA st\u0159\u00eddav\u00e9ho proudu<\/td><td>F\u00e1zov\u00e1 chyba p\u0159esn\u00e9ho modelu, linearita, odpor a pole line\u00e1rn\u00edho rozsahu<\/td><td>T\u011blo o rozm\u011brech 26 \u00d7 28,4 mm, otvor 8,5 mm, v\u00fdvody 200 mm<\/td><td>P\u0159esn\u00fd model, kompatibilita s p\u0159ipojen\u00fdmi za\u0159\u00edzen\u00edmi a po\u017eadovan\u00e1 dokumentace<\/td><\/tr>\n<\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">8. Postup ov\u011b\u0159ov\u00e1n\u00ed p\u0159esn\u00e9ho modelu<\/h2>\n\n\n\n<figure data-spectra-id=\"spectra-f1fee90c-2ee8-4fcd-818f-857d53fb04f6\" class=\"wp-block-image size-full\"><a href=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/current-transformer-selection-workflow.jpg\"><img loading=\"lazy\" decoding=\"async\" height=\"943\" width=\"900\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/current-transformer-selection-workflow.jpg\" alt=\"Postup ov\u011b\u0159ov\u00e1n\u00ed proudov\u00fdch transform\u00e1tor\u016f od po\u017eadavk\u016f aplikace a\u017e po stanoven\u00ed p\u0159enosov\u00e9ho pom\u011bru a potvrzen\u00ed p\u0159esn\u00e9ho modelu\" class=\"wp-image-790\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/current-transformer-selection-workflow.jpg 900w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/current-transformer-selection-workflow-600x629.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/current-transformer-selection-workflow-286x300.jpg 286w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/current-transformer-selection-workflow-768x805.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><figcaption class=\"wp-element-caption\">Koncep\u010dn\u00ed postup pro stanoven\u00ed po\u017eadavk\u016f na proudov\u00e9 transform\u00e1tory a ov\u011b\u0159en\u00ed konstrukce, prim\u00e1rn\u00edho proudu, sekund\u00e1rn\u00edho v\u00fdstupu, pom\u011bru, mechanick\u00e9 kompatibility, p\u0159esnosti, zat\u00ed\u017een\u00ed a p\u0159esn\u00fdch technick\u00fdch \u00fadaj\u016f p\u0159ed potvrzen\u00edm modelu a zasl\u00e1n\u00edm popt\u00e1vky. Nejedn\u00e1 se o metodu dimenzov\u00e1n\u00ed ani v\u00fdpo\u010dtu proudov\u00fdch transform\u00e1tor\u016f.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">9. \u00dadaje, kter\u00e9 je t\u0159eba uv\u00e9st v popt\u00e1vce na proudov\u00fd transform\u00e1tor<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Po\u017eadavky na pou\u017eit\u00ed a m\u011b\u0159en\u00ed<\/li><li>Po\u017eadovan\u00e1 konstrukce CT<\/li><li>Po\u017eadavek na prim\u00e1rn\u00ed proud<\/li><li>Po\u017eadovan\u00fd sekund\u00e1rn\u00ed v\u00fdkon a p\u0159evodov\u00fd pom\u011br, jsou-li zn\u00e1my<\/li><li>Rozm\u011bry vodi\u010de nebo p\u0159\u00edpojnice a po\u017eadovan\u00fd otvor<\/li><li>Po\u017eadavky na p\u0159\u00edstup k instalaci a upevn\u011bn\u00ed<\/li><li>Po\u017eadavky na p\u0159esnost a z\u00e1t\u011b\u017e, jsou-li relevantn\u00ed<\/li><li>Po\u017eadavky na frekvenci a izolaci nebo pevnost v elektrick\u00e9m oblouku<\/li><li>Mno\u017estv\u00ed a m\u00edsto ur\u010den\u00ed<\/li><li>Po\u017eadovan\u00e9 technick\u00e9 listy, v\u00fdkresy a dal\u0161\u00ed dokumentace<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">10. Kter\u00e1 data je\u0161t\u011b vy\u017eaduj\u00ed potvrzen\u00ed pomoc\u00ed p\u0159esn\u00e9ho modelu?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ov\u011b\u0159en\u00ed na \u00farovni modelu je nezbytn\u00e9 v\u017edy, kdy\u017e str\u00e1nka neuv\u00e1d\u00ed \u00faplnou konfiguraci v\u00fdstupu, clonu, rozm\u011bry, zp\u016fsob upevn\u011bn\u00ed, zat\u00ed\u017een\u00ed, frekvenci, izola\u010dn\u00ed pole nebo podp\u016frnou dokumentaci. Chyb\u011bj\u00edc\u00ed \u00fadaj neznamen\u00e1, \u017ee dan\u00fd po\u017eadavek nen\u00ed d\u016fle\u017eit\u00fd nebo \u017ee plat\u00ed hodnota z jin\u00e9 \u0159ady. Vy\u017e\u00e1dejte si p\u0159esn\u00fd model, kter\u00fd lze objednat, a dokumentaci pot\u0159ebnou pro v\u00e1\u0161 projekt.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CT Direction and Placement: Reviewing Unexpected Readings<\/h2>\n<p class=\"wp-block-paragraph\">When a monitoring system reports a negative value, zero current or a result that does not match another meter, first establish whether the reading is actually unexpected. Negative active power can indicate genuine export under the meter\u2019s sign convention. Confirm the operating power flow before treating a negative reading as a wiring fault.<\/p>\n<p class=\"wp-block-paragraph\">The same symptom can come from different causes: CT orientation, the wrong conductor or branch, phase mismatch, an incorrect ratio, or a software setting. Use the symptom to guide document and configuration review.<\/p>\n<h3 class=\"wp-block-heading\">Symptoms and records to review<\/h3>\n<figure class=\"wp-block-table\"><table><thead><tr><th>Observed symptom<\/th><th>Possible causes to consider<\/th><th>First non-invasive check<\/th><\/tr><\/thead><tbody><tr><td>Import and export appear reversed<\/td><td>Actual export, CT orientation, sign convention or measurement location<\/td><td>Compare operating power flow with the CT and meter documentation<\/td><\/tr><tr><td>Reading is close to zero during a load<\/td><td>For ordinary load measurement, opposing conductor currents can cancel; the wrong branch or an unclosed core can also be involved<\/td><td>Review drawings and commissioning photos; ask the installer to verify conductor routing<\/td><\/tr><tr><td>One phase differs<\/td><td>CT phase does not match the voltage reference or phase order<\/td><td>Compare phase labels and CT input channels<\/td><\/tr><tr><td>Value is consistently high or low<\/td><td>Ratio, scaling, unit or secondary-output setting<\/td><td>Compare the exact CT model and ratio with the meter configuration<\/td><\/tr><tr><td>Value changes sign between modes<\/td><td>Actual import\/export reversal, source\/load position or monitoring profile<\/td><td>Check real power flow first, then the documented sign convention<\/td><\/tr><\/tbody><\/table><\/figure>\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/docs.openenergymonitor.org\/electricity-monitoring\/ct-sensors\/installation.html\" target=\"_blank\" rel=\"noopener\">OpenEnergyMonitor\u2019s installation guidance<\/a> explains why a CT around multiple conductors can read their vector sum and why polarity affects real-power sign. Its single-conductor guidance applies to ordinary load measurement; dedicated residual-current or summation schemes require their own design instructions.<\/p>\n<h3 class=\"wp-block-heading\">Define the measurement boundary<\/h3>\n<p class=\"wp-block-paragraph\">A CT at a grid connection, between an inverter and a distribution board, or on a load branch answers a different question. A correct arrow cannot compensate for a CT installed at the wrong system boundary. Record the target, physical location, monitored conductor, positive direction, voltage reference and monitoring mode.<\/p>\n<h3 class=\"wp-block-heading\">Read the documented polarity convention<\/h3>\n<p class=\"wp-block-paragraph\">CTs may use an arrow, P1\/P2, H1\/H2, K\/L, a dot or another mark. The meaning must come from the CT or meter documentation. Follow this order: identify the exact CT and receiving device; read the positive-flow definition; compare the mark; check the voltage-reference phase and input channel; then check ratio, scale and mode.<\/p>\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.se.com\/au\/en\/faqs\/FA203850\/\" target=\"_blank\" rel=\"noopener\">Schneider\u2019s CT orientation guidance<\/a> covers polarity marks and limits installation and maintenance to qualified personnel. Use records and configuration screenshots for this review.<\/p>\n<h3 class=\"wp-block-heading\">Prepare the support request<\/h3>\n<ul class=\"wp-block-list\"><li>Exact CT model and complete suffix<\/li><li>Polarity marking, ratio and secondary output<\/li><li>Monitored conductor, phase and physical location<\/li><li>Receiving input type, ratio, scale factor and unit<\/li><li>Voltage-reference channel and monitoring mode<\/li><li>Timestamped screenshots, operating condition and installation records<\/li><\/ul>\n<h3 class=\"wp-block-heading\">Refer physical changes to qualified personnel<\/h3>\n<p class=\"wp-block-paragraph\">Stop at the document and software-review stage when the CT is inside a live distribution board, the CT type or secondary circuit is unknown, the conductor cannot be identified, or the proposed fix requires disconnecting leads or moving the sensor. A current-output CT with an open secondary can develop hazardous voltage while primary current is flowing. The exact CT construction and manufacturer\u2019s procedure must be checked by qualified personnel before physical changes.<\/p><h2 class=\"wp-block-heading\">\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Jak\u00e9 \u00fadaje jsou pot\u0159ebn\u00e9 pro v\u00fdb\u011br transform\u00e1toru proudu?<\/summary><p class=\"wp-block-paragraph\">Uve\u010fte \u00fa\u010del pou\u017eit\u00ed, konstrukci, prim\u00e1rn\u00ed proud, po\u017eadovan\u00fd sekund\u00e1rn\u00ed v\u00fdstup, p\u0159evodn\u00ed pom\u011br, rozm\u011brovou kompatibilitu, p\u0159\u00edstup pro instalaci, p\u0159esnost, p\u0159\u00edpadn\u00e9 zat\u00ed\u017een\u00ed, frekvenci, po\u017eadavky na izolaci a po\u017eadovanou dokumentaci s p\u0159esn\u00fdm modelem.<\/p><\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Jak\u00fd je rozd\u00edl mezi konstrukc\u00ed CT s d\u011blen\u00fdm j\u00e1drem a s uzav\u0159en\u00fdm j\u00e1drem?<\/summary><p class=\"wp-block-paragraph\">Proudov\u00fd transform\u00e1tor s d\u011blen\u00fdm j\u00e1drem se instaluje kolem st\u00e1vaj\u00edc\u00edho vodi\u010de nebo p\u0159\u00edpojnice. U proudov\u00e9ho transform\u00e1toru s uzav\u0159en\u00fdm j\u00e1drem mus\u00ed vodi\u010d proch\u00e1zet jeho otvorem. Ani jedna z t\u011bchto konstrukc\u00ed sama o sob\u011b nerozhoduje o elektrick\u00fdch vlastnostech nebo vhodnosti pro dan\u00e9 pou\u017eit\u00ed.<\/p><\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Mohu ur\u010dit CT pouze na z\u00e1klad\u011b prim\u00e1rn\u00edho proudu?<\/summary><p class=\"wp-block-paragraph\">Ne. Je t\u0159eba ov\u011b\u0159it tak\u00e9 sekund\u00e1rn\u00ed v\u00fdstup, p\u0159evodov\u00fd pom\u011br, kompatibilitu s p\u0159ipojen\u00fdmi za\u0159\u00edzen\u00edmi, fyzickou kompatibilitu, p\u0159esnost a dal\u0161\u00ed po\u017eadavky projektu.<\/p><\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Pro\u010d je nutn\u00e9 ov\u011b\u0159it sekund\u00e1rn\u00ed v\u00fdstup a pom\u011br transform\u00e1toru?<\/summary><p class=\"wp-block-paragraph\">\u0158ady RITOKS poskytuj\u00ed r\u016fzn\u00e9 v\u00fdstupn\u00ed form\u00e1ty. Model BH-0.66 60I vyu\u017e\u00edv\u00e1 explicitn\u00ed \u0159ady \/5A, model GTA20L poskytuje v\u00fdstup 20 mA st\u0159\u00eddav\u00e9ho proudu a \u0159ada DP neposkytuje v\u0161echny kompletn\u00ed v\u00fdstupn\u00ed konfigurace.<\/p><\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Je pro v\u0161echny CT p\u0159\u00edstroje RITOKS k dispozici stejn\u00e1 t\u0159\u00edda p\u0159esnosti?<\/summary><p class=\"wp-block-paragraph\">Ne. Term\u00edny t\u00fdkaj\u00edc\u00ed se p\u0159esnosti a v\u00fdkonu se li\u0161\u00ed podle \u0159ady a modelu. P\u0159esn\u00e9 \u00fadaje najdete v publikovan\u00e9 dokumentaci k dan\u00e9 \u0159ad\u011b nebo modelu.<\/p><\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Jsou hodnoty zat\u00ed\u017een\u00ed zve\u0159ejn\u011bny pro ka\u017ed\u00fd proudov\u00fd transform\u00e1tor RITOKS?<\/summary><p class=\"wp-block-paragraph\">Ne. P\u0159esn\u00e9 hodnoty VA jsou zve\u0159ejn\u011bny pro konkr\u00e9tn\u00ed \u0159ady BH-0.66 60I. Hodnota zat\u00ed\u017een\u00ed nen\u00ed pro \u0159adu DP zve\u0159ejn\u011bna a u modelu GTA20L by se nem\u011blo p\u0159edpokl\u00e1dat stejn\u00e9 r\u00e1mov\u00e1n\u00ed.<\/p><\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Co je t\u0159eba uv\u00e9st p\u0159i \u017e\u00e1dosti o p\u0159esn\u00fd CT model?<\/summary><p class=\"wp-block-paragraph\">Uve\u010fte elektrick\u00e9 a mechanick\u00e9 po\u017eadavky, po\u017eadovan\u00fd v\u00fdkon a p\u0159evodov\u00fd pom\u011br, podrobnosti k instalaci, mno\u017estv\u00ed, m\u00edsto ur\u010den\u00ed a technick\u00fd list nebo v\u00fdkresy pot\u0159ebn\u00e9 k ov\u011b\u0159en\u00ed.<\/p><\/details>\n\n\n\n<div class=\"wp-block-group has-base-color has-contrast-background-color has-text-color has-background is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading\">Ov\u011b\u0159te, jak\u00fd p\u0159esn\u00fd proudov\u00fd transform\u00e1tor je vhodn\u00fd pro v\u00e1\u0161 projekt<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Za\u0161lete spole\u010dnosti RITOKS sv\u00e9 po\u017eadavky na aplikaci, pr\u016ftok, v\u00fdkon, pom\u011br, fyzickou kompatibilitu a dokumentaci, abychom mohli prov\u00e9st posouzen\u00ed konkr\u00e9tn\u00edho modelu.<\/p>\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/ritoks.com\/cs\/contact-us\/\">Obra\u0165te se na spole\u010dnost RITOKS s \u017e\u00e1dost\u00ed o cenovou nab\u00eddku<\/a><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Selecting a current transformer starts with the measurement requirement, not with a model number alone. Buyers should define the physical [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1427,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-disable-related-posts":"","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-5)","background-image":"","background-repeat":"repeat","background-position":"center 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