{"id":22285,"date":"2025-11-14T08:53:10","date_gmt":"2025-11-14T08:53:10","guid":{"rendered":"https:\/\/www.tronkiele.com\/?post_type=product&#038;p=22285"},"modified":"2025-11-14T08:53:10","modified_gmt":"2025-11-14T08:53:10","slug":"chinese-3-phase-dry-type-auto-transformer-440v-to-220v","status":"publish","type":"product","link":"https:\/\/www.tronkiele.com\/pt\/product\/chinese-3-phase-dry-type-auto-transformer-440v-to-220v\/","title":{"rendered":"QSG Chin\u00eas Trif\u00e1sico Tipo Seco Auto transformador 440v a 220v"},"content":{"rendered":"<h2>O que \u00e9 um autotransformador trif\u00e1sico de tipo seco?<\/h2>\n<p>Um autotransformador trif\u00e1sico utiliza uma estrutura de enrolamento partilhada, em que as tens\u00f5es prim\u00e1ria e secund\u00e1ria s\u00e3o derivadas da mesma bobina. Este design reduz a utiliza\u00e7\u00e3o de cobre, melhora a efici\u00eancia e reduz o custo - tornando-o ideal para aplica\u00e7\u00f5es que requerem convers\u00e3o de tens\u00e3o sem isolamento el\u00e9trico total.<\/p>\n<p data-start=\"1271\" data-end=\"1336\">Em compara\u00e7\u00e3o com os transformadores isolados, um autotransformador oferece:<\/p>\n<ul data-start=\"1337\" data-end=\"1462\">\n<li data-start=\"1337\" data-end=\"1385\">\n<p data-start=\"1339\" data-end=\"1385\">Maior efici\u00eancia devido \u00e0 redu\u00e7\u00e3o das perdas de cobre<\/p>\n<\/li>\n<li data-start=\"1386\" data-end=\"1407\">\n<p data-start=\"1388\" data-end=\"1407\">Pegada mais pequena<\/p>\n<\/li>\n<li data-start=\"1408\" data-end=\"1430\">\n<p data-start=\"1410\" data-end=\"1430\">Custo global mais baixo<\/p>\n<\/li>\n<li data-start=\"1431\" data-end=\"1462\">\n<p data-start=\"1433\" data-end=\"1462\">Regula\u00e7\u00e3o de tens\u00e3o melhorada<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1464\" data-end=\"1643\">Isto faz com que a s\u00e9rie QSG seja a solu\u00e7\u00e3o preferida para a convers\u00e3o de <strong data-start=\"1526\" data-end=\"1542\">440V a 220V<\/strong>, <strong data-start=\"1544\" data-end=\"1560\">660V a 380V<\/strong>ou sistemas de distribui\u00e7\u00e3o multi-tens\u00e3o em instala\u00e7\u00f5es industriais e comerciais.<\/p>\n<h2>Par\u00e2metros t\u00e9cnicos<\/h2>\n<table>\n<tbody>\n<tr>\n<td width=\"113\">Modelo<\/td>\n<td colspan=\"5\" width=\"465\"><strong><b>QSG-500VA~500KVA<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Fase<\/td>\n<td colspan=\"5\" width=\"465\">Trif\u00e1sico<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Tens\u00e3o de entrada<\/td>\n<td colspan=\"5\" width=\"465\">Predefini\u00e7\u00e3o 380V 660V 440V 220V (tens\u00e3o personaliz\u00e1vel)<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Tens\u00e3o de sa\u00edda<\/td>\n<td colspan=\"5\" width=\"465\">Predefini\u00e7\u00e3o 220V 1140V 690V 660V 440V 415V 400V 380V 220V 110V (tens\u00e3o personaliz\u00e1vel)<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Precis\u00e3o da tens\u00e3o<\/td>\n<td colspan=\"5\" width=\"465\">\u00b11%<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Taxa de varia\u00e7\u00e3o da tens\u00e3o<\/td>\n<td colspan=\"5\" width=\"465\">\u22641.5%<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Efici\u00eancia<\/td>\n<td colspan=\"5\" width=\"465\">Indutivo (isolado) \u226599%<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Resist\u00eancia \u00e0 eletricidade<\/td>\n<td colspan=\"5\" width=\"465\">1500VA\/min<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Capacidade de sobrecarga<\/td>\n<td colspan=\"5\" width=\"465\">A sobrecarga n\u00e3o \u00e9 recomendada<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Temperatura ambiente<\/td>\n<td colspan=\"5\" width=\"465\">-10\u00b0C~+ 40\u00b0C<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Distor\u00e7\u00e3o de forma de onda<\/td>\n<td colspan=\"5\" width=\"465\">Sem distor\u00e7\u00e3o adicional da forma de onda<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">M\u00e9todo de arrefecimento<\/td>\n<td colspan=\"5\" width=\"465\">Arrefecimento por ar seco<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">M\u00e9todo de liga\u00e7\u00e3o<\/td>\n<td colspan=\"5\" width=\"465\">D\/Y Y\/Y personaliz\u00e1vel<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Classe de isolamento<\/td>\n<td colspan=\"5\" width=\"465\">Classe F<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Pot\u00eancia<\/td>\n<td width=\"93\">8KVA<\/td>\n<td width=\"93\">10KVA<\/td>\n<td width=\"93\">15KVA<\/td>\n<td width=\"92\">20KVA<\/td>\n<td width=\"93\">30KVA<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Tamanho (mm) L*W*H<\/td>\n<td width=\"93\">380*320*435<\/td>\n<td width=\"93\">460*350*440<\/td>\n<td width=\"93\">460*350*440<\/td>\n<td width=\"92\">500*370*495<\/td>\n<td width=\"93\">500*370*495<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Pot\u00eancia<\/td>\n<td width=\"93\">50KVA<\/td>\n<td width=\"93\">60KVA<\/td>\n<td width=\"93\">70KVA<\/td>\n<td width=\"92\">80KVA<\/td>\n<td width=\"93\">100KVA<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Tamanho (mm) L*W*H<\/td>\n<td width=\"93\">560*430*555<\/td>\n<td width=\"93\">560*430*555<\/td>\n<td width=\"93\">580*460*630<\/td>\n<td width=\"92\">580*460*630<\/td>\n<td width=\"93\">750*480*780<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Pot\u00eancia<\/td>\n<td width=\"93\">150KVA<\/td>\n<td width=\"93\">200KVA<\/td>\n<td width=\"93\">250KVA<\/td>\n<td width=\"92\">300KVA<\/td>\n<td width=\"93\">400KVA<\/td>\n<\/tr>\n<tr>\n<td width=\"113\">Tamanho (mm) L*W*H<\/td>\n<td width=\"93\">750*480*780<\/td>\n<td width=\"93\">750*480*780<\/td>\n<td width=\"93\">780*600*800<\/td>\n<td width=\"92\">780*600*800<\/td>\n<td width=\"93\">850*650*850<\/td>\n<\/tr>\n<tr>\n<td colspan=\"6\" width=\"578\">O tamanho e o peso variam consoante a gama de tens\u00e3o, e est\u00e3o sujeitos ao product atual personalizado.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Principais carater\u00edsticas e vantagens<\/h2>\n<h3 data-start=\"1683\" data-end=\"1730\"><strong data-start=\"1687\" data-end=\"1730\">Constru\u00e7\u00e3o de alta efici\u00eancia do tipo seco<\/strong><\/h3>\n<p data-start=\"1731\" data-end=\"1893\">A estrutura arrefecida a ar seco elimina os riscos de fugas de \u00f3leo e \u00e9 mais segura para ambientes interiores, como oficinas, salas de controlo e arm\u00e1rios de equipamento de maquinaria.<\/p>\n<h3 data-start=\"1895\" data-end=\"1933\"><strong data-start=\"1899\" data-end=\"1933\">Convers\u00e3o de tens\u00e3o de precis\u00e3o<\/strong><\/h3>\n<ul data-start=\"1934\" data-end=\"2039\">\n<li data-start=\"1934\" data-end=\"1963\">\n<p data-start=\"1936\" data-end=\"1963\">Precis\u00e3o da tens\u00e3o: <strong data-start=\"1954\" data-end=\"1961\">\u00b11%<\/strong><\/p>\n<\/li>\n<li data-start=\"1964\" data-end=\"2001\">\n<p data-start=\"1966\" data-end=\"2001\">Taxa de varia\u00e7\u00e3o da tens\u00e3o: <strong data-start=\"1990\" data-end=\"1999\">\u22641.5%<\/strong><\/p>\n<\/li>\n<li data-start=\"2002\" data-end=\"2039\">\n<p data-start=\"2004\" data-end=\"2039\">Sem distor\u00e7\u00e3o adicional da forma de onda<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2041\" data-end=\"2118\">Assegura que o equipamento sens\u00edvel recebe energia trif\u00e1sica est\u00e1vel e limpa.<\/p>\n<h3 data-start=\"2120\" data-end=\"2163\"><strong data-start=\"2124\" data-end=\"2163\">Amplas op\u00e7\u00f5es de tens\u00e3o personaliz\u00e1veis<\/strong><\/h3>\n<p data-start=\"2164\" data-end=\"2312\"><strong data-start=\"2164\" data-end=\"2182\">Op\u00e7\u00f5es de entrada:<\/strong> 380V \/ 440V \/ 660V \/ 220V (ou personalizado)<br data-start=\"2220\" data-end=\"2223\" \/><strong data-start=\"2223\" data-end=\"2242\">Op\u00e7\u00f5es de sa\u00edda:<\/strong> 220V \/ 380V \/ 400V \/ 415V \/ 440V \/ 690V \/ 110V \/ 1140V (personaliz\u00e1vel)<\/p>\n<h3 data-start=\"2314\" data-end=\"2344\"><strong data-start=\"2318\" data-end=\"2344\">Excelente efici\u00eancia<\/strong><\/h3>\n<p data-start=\"2345\" data-end=\"2433\">A efici\u00eancia do transformador pode atingir <strong data-start=\"2378\" data-end=\"2386\">\u226599%<\/strong>reduzindo significativamente os custos energ\u00e9ticos a longo prazo.<\/p>\n<h3 data-start=\"2435\" data-end=\"2469\"><strong data-start=\"2439\" data-end=\"2469\">Design industrial robusto<\/strong><\/h3>\n<ul data-start=\"2470\" data-end=\"2613\">\n<li data-start=\"2470\" data-end=\"2492\">\n<p data-start=\"2472\" data-end=\"2492\">Isolamento de classe F<\/p>\n<\/li>\n<li data-start=\"2493\" data-end=\"2534\">\n<p data-start=\"2495\" data-end=\"2534\">Toler\u00e2ncia de temperatura: -10\u00b0C a +40\u00b0C<\/p>\n<\/li>\n<li data-start=\"2535\" data-end=\"2571\">\n<p data-start=\"2537\" data-end=\"2571\">Refrigerado a ar, de f\u00e1cil manuten\u00e7\u00e3o<\/p>\n<\/li>\n<li data-start=\"2572\" data-end=\"2613\">\n<p data-start=\"2574\" data-end=\"2613\">Personaliz\u00e1vel <strong data-start=\"2587\" data-end=\"2613\">Liga\u00e7\u00f5es D\/Y ou Y\/Y<\/strong><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"2615\" data-end=\"2667\"><strong data-start=\"2619\" data-end=\"2667\">Fabrico fi\u00e1vel de transformadores na China<\/strong><\/h3>\n<p data-start=\"2668\" data-end=\"2839\">Cada autotransformador QSG \u00e9 fabricado segundo normas rigorosas e \u00e9 submetido a ensaios de rigidez diel\u00e9ctrica a <strong data-start=\"2781\" data-end=\"2796\">1500V\/1 min<\/strong>garantindo durabilidade e seguran\u00e7a de funcionamento.<\/p>\n<p data-start=\"2841\" data-end=\"2966\">A equipa de engenharia da ZHENGXI apoia projectos OEM\/ODM e fornece orienta\u00e7\u00e3o de configura\u00e7\u00e3o de tens\u00e3o para clientes internacionais.<\/p>\n<h2 data-start=\"3777\" data-end=\"3841\"><strong data-start=\"3780\" data-end=\"3841\">Onde s\u00e3o utilizados os autotransformadores trif\u00e1sicos de 440V para 220V?<\/strong><\/h2>\n<h3 data-start=\"3843\" data-end=\"3874\"><strong data-start=\"3847\" data-end=\"3874\">Aplica\u00e7\u00f5es industriais<\/strong><\/h3>\n<ul data-start=\"3875\" data-end=\"3999\">\n<li data-start=\"3875\" data-end=\"3892\">\n<p data-start=\"3877\" data-end=\"3892\">M\u00e1quinas CNC<\/p>\n<\/li>\n<li data-start=\"3893\" data-end=\"3917\">\n<p data-start=\"3895\" data-end=\"3917\">Arm\u00e1rios de controlo PLC<\/p>\n<\/li>\n<li data-start=\"3918\" data-end=\"3949\">\n<p data-start=\"3920\" data-end=\"3949\">Motores e bombas industriais<\/p>\n<\/li>\n<li data-start=\"3950\" data-end=\"3974\">\n<p data-start=\"3952\" data-end=\"3974\">Equipamento de automatiza\u00e7\u00e3o<\/p>\n<\/li>\n<li data-start=\"3975\" data-end=\"3999\">\n<p data-start=\"3977\" data-end=\"3999\">AVAC e compressores<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4001\" data-end=\"4032\"><strong data-start=\"4005\" data-end=\"4032\">Aplica\u00e7\u00f5es comerciais<\/strong><\/h3>\n<ul data-start=\"4033\" data-end=\"4119\">\n<li data-start=\"4033\" data-end=\"4056\">\n<p data-start=\"4035\" data-end=\"4056\">Quadros de distribui\u00e7\u00e3o<\/p>\n<\/li>\n<li data-start=\"4057\" data-end=\"4085\">\n<p data-start=\"4059\" data-end=\"4085\">Sistemas de controlo de elevadores<\/p>\n<\/li>\n<li data-start=\"4086\" data-end=\"4119\">\n<p data-start=\"4088\" data-end=\"4119\">Oficinas e pequenas f\u00e1bricas<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4121\" data-end=\"4155\"><strong data-start=\"4125\" data-end=\"4155\">Sistemas renov\u00e1veis e de energia<\/strong><\/h3>\n<ul data-start=\"4156\" data-end=\"4235\">\n<li data-start=\"4156\" data-end=\"4173\">\n<p data-start=\"4158\" data-end=\"4173\">Turbinas e\u00f3licas<\/p>\n<\/li>\n<li data-start=\"4174\" data-end=\"4204\">\n<p data-start=\"4176\" data-end=\"4204\">Integra\u00e7\u00e3o do inversor solar<\/p>\n<\/li>\n<li data-start=\"4205\" data-end=\"4235\">\n<p data-start=\"4207\" data-end=\"4235\">Armazenamento distribu\u00eddo de energia<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4237\" data-end=\"4390\">A s\u00e9rie QSG \u00e9 especialmente popular no Sudeste Asi\u00e1tico, Am\u00e9rica do Sul, \u00c1frica e regi\u00f5es do M\u00e9dio Oriente devido \u00e0 sua fiabilidade e pre\u00e7o competitivo.<\/p>\n<h2 data-start=\"4397\" data-end=\"4423\"><strong data-start=\"4400\" data-end=\"4423\">Porqu\u00ea escolher a ZHENGXI?<\/strong><\/h2>\n<ul data-start=\"4424\" data-end=\"4719\">\n<li data-start=\"4424\" data-end=\"4493\">\n<p data-start=\"4426\" data-end=\"4493\"><strong data-start=\"4426\" data-end=\"4466\">Fabricante chin\u00eas de topo de transformadores<\/strong> com distribui\u00e7\u00e3o global<\/p>\n<\/li>\n<li data-start=\"4494\" data-end=\"4548\">\n<p data-start=\"4496\" data-end=\"4548\">R\u00e1pida production, forte R&amp;D, e personaliza\u00e7\u00e3o OEM<\/p>\n<\/li>\n<li data-start=\"4549\" data-end=\"4619\">\n<p data-start=\"4551\" data-end=\"4619\">Competitivo <strong data-start=\"4563\" data-end=\"4592\">Pre\u00e7o do transformador trif\u00e1sico<\/strong> vs. marcas internacionais<\/p>\n<\/li>\n<li data-start=\"4620\" data-end=\"4668\">\n<p data-start=\"4622\" data-end=\"4668\">Mais de 10.000 unidades exportadas anualmente para todo o mundo<\/p>\n<\/li>\n<li data-start=\"4669\" data-end=\"4719\">\n<p data-start=\"4671\" data-end=\"4719\">CE, ISO e relat\u00f3rios rigorosos de inspe\u00e7\u00e3o da f\u00e1brica<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4721\" data-end=\"4869\">Quer esteja a substituir um transformador antigo ou a conceber um novo sistema de distribui\u00e7\u00e3o de energia, a ZHENGXI fornece solu\u00e7\u00f5es padr\u00e3o e personalizadas.<\/p>\n<h2 data-start=\"4876\" data-end=\"4932\"><strong data-start=\"4879\" data-end=\"4932\">Como escolher o autotransformador 440V\u2192220V correto<\/strong><\/h2>\n<p data-start=\"4933\" data-end=\"5016\"><strong data-start=\"4933\" data-end=\"4971\">1. Determinar a carga nominal (kVA).<\/strong><br data-start=\"4971\" data-end=\"4974\" \/>Acrescentar a pot\u00eancia do equipamento + margem de seguran\u00e7a 20%.<\/p>\n<p data-start=\"5018\" data-end=\"5109\"><strong data-start=\"5018\" data-end=\"5056\">2. Confirmar a tens\u00e3o de entrada e de sa\u00edda.<\/strong><br data-start=\"5056\" data-end=\"5059\" \/>Indique-nos a sua tens\u00e3o de rede exacta (por exemplo, 440V \u00b110%).<\/p>\n<p data-start=\"5111\" data-end=\"5185\"><strong data-start=\"5111\" data-end=\"5143\">3. Selecionar o m\u00e9todo de liga\u00e7\u00e3o.<\/strong><br data-start=\"5143\" data-end=\"5146\" \/>D\/Y ou Y\/Y depende da liga\u00e7\u00e3o \u00e0 terra do sistema.<\/p>\n<p data-start=\"5187\" data-end=\"5297\"><strong data-start=\"5187\" data-end=\"5235\">4. Verificar o ambiente de arrefecimento e de instala\u00e7\u00e3o.<\/strong><br data-start=\"5235\" data-end=\"5238\" \/>As unidades de tipo seco s\u00e3o ideais para utiliza\u00e7\u00e3o no interior ou em salas sem p\u00f3.<\/p>\n<p data-start=\"5299\" data-end=\"5368\">Se n\u00e3o tiver a certeza, os nossos engenheiros recomendar\u00e3o o modelo correto em minutos.<\/p>\n<h2 data-start=\"5375\" data-end=\"5385\"><strong data-start=\"5378\" data-end=\"5385\">FAQ<\/strong><\/h2>\n<h3 data-start=\"5387\" data-end=\"5451\"><strong data-start=\"5391\" data-end=\"5449\">Q1: Um autotransformador de tipo seco \u00e9 seguro para utiliza\u00e7\u00e3o em interiores?<\/strong><\/h3>\n<p data-start=\"5452\" data-end=\"5599\">Sim. Utiliza uma estrutura arrefecida a ar, sem \u00f3leo - segura para f\u00e1bricas, armaz\u00e9ns e edif\u00edcios comerciais sem risco de fugas de \u00f3leo ou de inc\u00eandio.<\/p>\n<h3 data-start=\"5601\" data-end=\"5679\"><strong data-start=\"5605\" data-end=\"5677\">Q2: Qual \u00e9 o pre\u00e7o t\u00edpico de um transformador trif\u00e1sico de 440V para 220V?<\/strong><\/h3>\n<p data-start=\"5680\" data-end=\"5810\">O <strong data-start=\"5684\" data-end=\"5718\">transformador 440V para 220V pre\u00e7o<\/strong> depende da capacidade (kVA), da tens\u00e3o e do m\u00e9todo de liga\u00e7\u00e3o. Contacte-nos para um or\u00e7amento r\u00e1pido.<\/p>\n<h3 data-start=\"5812\" data-end=\"5878\"><strong data-start=\"5816\" data-end=\"5876\">Q3: Pode personalizar a tens\u00e3o para equipamento especial?<\/strong><\/h3>\n<p data-start=\"5879\" data-end=\"5970\">Sem d\u00favida. Podemos produzir qualquer combina\u00e7\u00e3o de tens\u00e3o, como 660\u2192380V, 440\u2192415V ou 400\u2192220V.<\/p>","protected":false},"excerpt":{"rendered":"<p>Se a sua instala\u00e7\u00e3o requer uma convers\u00e3o de tens\u00e3o est\u00e1vel e eficiente - de <strong data-start=\"465\" data-end=\"481\">440V a 220V<\/strong>, <strong data-start=\"483\" data-end=\"499\">380V a 220V<\/strong>ou outras tens\u00f5es trif\u00e1sicas personalizadas - o <strong data-start=\"546\" data-end=\"605\">Autotransformador trif\u00e1sico de tipo seco da s\u00e9rie ZHENGXI QSG<\/strong> foi concebido para proporcionar um desempenho fi\u00e1vel, uma elevada efici\u00eancia e uma longa vida \u00fatil. Como um produto de confian\u00e7a <strong data-start=\"704\" data-end=\"727\">Transformador chin\u00eas<\/strong> fabricante, a ZHENGXI oferece engenharia avan\u00e7ada, controlo de qualidade rigoroso e pre\u00e7os competitivos <strong data-start=\"821\" data-end=\"850\">Pre\u00e7o do transformador trif\u00e1sico<\/strong> op\u00e7\u00f5es para suportar aplica\u00e7\u00f5es industriais globais.<\/p>","protected":false},"featured_media":22287,"template":"","meta":[],"product_brand":[],"product_cat":[42,100],"product_tag":[],"class_list":{"0":"post-22285","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-low-voltage-transformer","7":"product_cat-three-phase-transformer","9":"first","10":"instock","11":"taxable","12":"shipping-taxable","13":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Chinese 3 phase Dry Type Auto transformer 440v to 220v Manufacturer - PINE-ZHENGXI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.tronkiele.com\/pt\/product\/chinese-3-phase-dry-type-auto-transformer-440v-to-220v\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chinese 3 phase Dry Type Auto transformer 440v to 220v Manufacturer - PINE-ZHENGXI\" \/>\n<meta property=\"og:description\" content=\"If your facility requires stable and efficient voltage conversion\u2014from 440V to 220V, 380V to 220V, or other customized three-phase voltages\u2014the ZHENGXI QSG Series Three-Phase Dry Type Autotransformer is designed to deliver reliable performance, high efficiency, and long service life. 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