{"id":374,"date":"2017-06-30T10:19:33","date_gmt":"2017-06-30T08:19:33","guid":{"rendered":"https:\/\/www.peter-electronic.com\/en\/?page_id=374"},"modified":"2017-06-30T10:19:33","modified_gmt":"2017-06-30T08:19:33","slug":"how-to-rate-the-pre-fuses","status":"publish","type":"page","link":"https:\/\/www.peter-electronic.com\/en\/service\/faq\/dc-brakes\/how-to-rate-the-pre-fuses\/","title":{"rendered":"How to rate the pre-fuses?"},"content":{"rendered":"<p>Basically, two types of fuse are available for the user:<\/p>\n<ol>\n<li>Fusing according to allocation type \u201e1\u201c DIN EN 60947-4-2.<br \/>\nAfter a short circuit, the braking device is allowed to be inoperative.<\/li>\n<li>Fusing according to allocation type \u201e2\u201c DIN EN 60947-4-2.<\/li>\n<\/ol>\n<p>After a short circuit, the braking device must be suitable for further use. However, there is the danger that the contacts of the braking relay (braking contactor) weld. Therefore, if possible, these contacts are to be checked prior to reconnecting the device to the supply. If this check cannot be carried out by the user, the device has to be returned to the producer in order to have it checked.<\/p>\n<p>The following dimensioning information refers to the below operating conditions:<\/p>\n<ul>\n<li>Use of standard asynchronous motors<\/li>\n<li>Braking time not exceeding 20s, for braking devices up to 36A<\/li>\n<li>Braking time not exceeding 40s, for braking devices from 40A up<\/li>\n<li>Braking current not exceeding 2.5x INOM of the motor<\/li>\n<li>Cyclic duration factor (c.d.f.) not exceeding the value indicated on the data sheet<\/li>\n<\/ul>\n<p>Fusing according to allocation type \u201e1\u201c:<br \/>\nAs pre-fuses, we recommend to use line protection fuses (utilization category gL) or automatic circuit-breakers with tripping characteristic  B, C, D or K.<br \/>\nTaking into account the maximum braking currents that occur (normally the nominal\/rated device current), we recommend fuses according the information in the respective instruction manual.<br \/>\nNote! Wiring cross-sectional area according to DIN VDE 0100-430, DIN EN 57100-430.<\/p>\n<p>Fusing according to allocation type \u201e2\u201c:<br \/>\nThe power semiconductors are to be protected by fuses of the utilization category gR (semiconductors fuses, high-speed fuses).<br \/>\nHowever, since these fuses do not ensure line protection, it is necessary to use additionally line protection fuses (utilize. Category gL).<br \/>\nAs for the dimensioning of the line protection fuse (gL), please refer to the instruction manual.<br \/>\nTo protect the semiconductors it is necessary to select gR-fuses featuring cutoff I\u00b2t-values of the ranges indicated in technical data sheet or instruction manual.<br \/>\nIn this connection, the current value of the selected fuse should not be smaller than the braking current to be expected (nominal\/rated device current).<\/p>\n<p>Notes<\/p>\n<ul>\n<li>On the basis of the recommended I\u00b2t-value, braking current, and possibly the c.d.f., the fuse supplier is able to select a suitable type. Due to the great variety of producers, sizes and types, PETER electronic does not recommend any particular fuses.<\/li>\n<li>If the value of the fuse or cutoff-I\u00b2t is selected too small, it may happen that the semiconductor fuse reacts during braking<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Basically, two types of fuse are available for the user: Fusing according to allocation type \u201e1\u201c DIN EN 60947-4-2. After a short circuit, the braking device is allowed to be inoperative. Fusing according to allocation type \u201e2\u201c DIN EN 60947-4-2. After a short circuit, the braking device must be suitable for further use. However, there [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":211,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-374","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to rate the pre-fuses? - Frequenzumrichter, Softstarter und Bremsger\u00e4te direkt vom Hersteller<\/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.peter-electronic.com\/service\/faq\/dc-brakes\/how-to-rate-the-pre-fuses\/\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.peter-electronic.com\/en\/service\/faq\/dc-brakes\/how-to-rate-the-pre-fuses\/\",\"url\":\"https:\/\/www.peter-electronic.com\/en\/service\/faq\/dc-brakes\/how-to-rate-the-pre-fuses\/\",\"name\":\"How to rate the pre-fuses? 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