{"id":10450,"date":"2016-01-18T11:03:43","date_gmt":"2016-01-18T10:03:43","guid":{"rendered":"http:\/\/wordpress-trafo.p593907.webspaceconfig.de\/produkt\/three-phase-du-dt-choke\/"},"modified":"2026-01-22T14:28:09","modified_gmt":"2026-01-22T13:28:09","slug":"three-phase-du-dt-choke","status":"publish","type":"product","link":"https:\/\/www.buerkle-schoeck-trafo.de\/en\/produkt\/three-phase-du-dt-choke\/","title":{"rendered":"Three-phase du\/dt choke"},"content":{"rendered":"<p><strong>Information:<\/strong><\/p>\n<ul>\n<li>The voltage on the output side of a frequency converter is a pulsating alternating voltage (clock frequency). This results in voltage peaks of up to 5 kV\/\u00b5s. In the long term, these voltage peaks destroy the insulation of the downstream motors. Our du\/dt chokes attenuate these voltage peaks (approx. &lt; 1500 V\/\u00b5S). This value depends on factors such as the du\/dt of the frequency inverter, cable length, cable quality, etc.<\/li>\n<\/ul>\n<ul>\n<li>Three-phase du\/dt choke, rated voltage Un =400 V<\/li>\n<\/ul>\n<ul>\n<li>screened cable length: 3 m to 30 m. Suitable for dynamic applications.<\/li>\n<\/ul>\n<ul>\n<li>Chokes are vacuum impregnated with cast resin varnish to reduce humming and to increase insulation.<\/li>\n<\/ul>\n<ul>\n<li>We use high-quality insulation materials for the chokes for insulation class T40\/F and very high-quality sheet metal.<\/li>\n<\/ul>\n<ul>\n<li>Connections as terminals, cable lugs or copper rails, depending on current rating. (Protection class IP00, installation up to IP21)<\/li>\n<\/ul>\n<ul>\n<li>Unit-tested including a high-voltage insulation test with several 1000V. CE-compliant<\/li>\n<\/ul>\n<p>Another solution is an air coil (see <a href=\"https:\/\/www.buerkle-schoeck-trafo.de\/en\/produkt\/air-coil\/\"><strong>air coil<\/strong><\/a>).<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<p>&nbsp;<\/p>\n<p><strong>Downloads:<\/strong><\/p>\n<p><a href=\"https:\/\/www.buerkle-schoeck-trafo.de\/wp-content\/uploads\/2024\/02\/DUD01VR.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Three-phase du\/dt choke 400V 50Hz (pdf, 359 KB)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><span style=\"color: #000000\"><strong>Series DUD404<\/strong><\/span><\/p>\n","protected":false},"featured_media":8923,"comment_status":"open","ping_status":"closed","template":"","meta":{"content-type":""},"product_brand":[],"product_cat":[130],"product_tag":[],"class_list":["post-10450","product","type-product","status-publish","has-post-thumbnail","product_cat-chokes","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - 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