{"id":5751,"date":"2024-04-07T11:23:49","date_gmt":"2024-04-07T09:23:49","guid":{"rendered":"https:\/\/www.mwtc.tech\/index.php\/portfolio-items\/cizatice-transmitter-reconstruction\/"},"modified":"2024-11-12T21:51:30","modified_gmt":"2024-11-12T20:51:30","slug":"cizatice-transmitter-reconstruction","status":"publish","type":"avada_portfolio","link":"https:\/\/www.mwtc.tech\/index.php\/portfolio-items\/cizatice-transmitter-reconstruction\/?lang=en","title":{"rendered":"\u010ci\u017eatice transmitter reconstruction"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1216.8px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><ul class=\"project_startlist\">\n<li>\n<h4><strong>Project Starting Date<\/strong><\/h4>\n<p>10.05.2021<\/li>\n<li>\n<h4><strong>Project End<\/strong><\/h4>\n<p>14.12.2021<\/li>\n<\/ul>\n<div class=\"row case_study_col mbot35\">\n<div class=\"col-lg-12 col-md-12 col-sm-12 col-cs-12\">\n<h4 class=\"fnt_28\"><strong>Project Description<\/strong><\/h4>\n<p class=\"line_he4 mbot30\">Our company&#8217;s role was to oversee the replacement of the mid-wave transmitter. The original technology from fy. Tesla from around the 90&#8217;s of the last century was replaced with the NX-5 transmitter of Canadian company Nautel. Location of the workplace &#8211; the building \u010ci\u017eatice about halfway between Pre\u0161ov and Ko\u0161ice. The signal path starts in a metal container where the transmitter is located, which is connected by a 50 Ohm coaxial cable to the antenna house to the L type matching circuit and from there to a transmitting monopole with a height of about 75m.    <\/p>\n<p><img decoding=\"async\" class=\"lazyload alignnone size-medium wp-image-5214\" src=\"http:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-300x179.jpg\" data-orig-src=\"http:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-300x179.jpg\" alt=\"\" width=\"300\" height=\"179\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27300%27%20height%3D%27179%27%20viewBox%3D%270%200%20300%20179%27%3E%3Crect%20width%3D%27300%27%20height%3D%27179%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-200x120.jpg 200w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-300x179.jpg 300w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-400x239.jpg 400w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-600x359.jpg 600w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-768x459.jpg 768w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-800x478.jpg 800w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-1024x612.jpg 1024w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-1200x718.jpg 1200w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3-1536x919.jpg 1536w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice3.jpg 1617w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 300px) 100vw, 300px\" \/>                                  <img decoding=\"async\" class=\"lazyload alignnone size-medium wp-image-5216\" src=\"http:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-300x182.jpg\" data-orig-src=\"http:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-300x182.jpg\" alt=\"\" width=\"300\" height=\"182\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27300%27%20height%3D%27182%27%20viewBox%3D%270%200%20300%20182%27%3E%3Crect%20width%3D%27300%27%20height%3D%27182%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-200x122.jpg 200w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-300x182.jpg 300w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-400x243.jpg 400w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-600x365.jpg 600w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-768x467.jpg 768w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-800x487.jpg 800w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-1024x623.jpg 1024w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-1200x730.jpg 1200w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2-1536x934.jpg 1536w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice2.jpg 1616w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p class=\"line_he4\">During the initial measurement of the signal path, it was found that the L link could not be set to PSV=1, that the coaxial cable exhibited inductive reactance, and that the ground wires were connected in violation of the NX-5 transmitter requirements. The lightning arrestor system of the monopole exhibited high ground resistance. The feeder\/coaxial cable was replaced in agreement with the operator. Also, the wires connecting the antenna house to the container were purchased and were wired to minimize both the external and internal impedance of the cables. A fault on the lightning conductor system was also corrected. Mechanically, the bolts were replaced and the cables holding the transmitting monopole in a perpendicular position were tensioned.     <\/p>\n<\/div>\n<\/div>\n<div class=\"row case_study_col mbot35\">\n<div class=\"col-lg-12 col-md-12 col-sm-12 col-cs-12\">\n<h4 class=\"fnt_28\"><strong>The Challenge in the design<\/strong><\/h4>\n<p class=\"line_he4 mbot30\">Apart from a number of minor flaws, which could be solved relatively quickly and without special knowledge, two problems remained: 1. the improperly connected L cell. 2. only one spark plug protecting the transmitter from direct lightning strike. The problem with the L cell was solved by making a new mechanical holder for the battery of capacitors with a larger capacitance than it originally had, and adjusting the inductance of the coil, using a shorting lead. When the elements were mounted in the switchboard, it was already possible to set the PSF to a value close to 1.    <\/p>\n<p class=\"line_he4\">The bigger problem was solving problem 2. It is clear to any technically savvy reader that an element, elements, must be used on the route to the transmitter to reduce the voltage level on the line &#8211; a reverberating pulse that is caused by lightning and not sparking out on the spark gap. <\/p>\n<\/div>\n<div class=\"col-lg-12 col-md-12 col-sm-12 col-cs-12\">\n<div class=\"description_txt\">\n<p class=\"line_he4 mbot30\">  Such an element appears to be a sufficiently powerful blestkoist &#8211; GDT. The company has found a solution where and how to connect a set of GDT elements so that they are not destroyed at the first lightning strike and at the same time sufficiently protect the transmitter from damage. For more information on the design methodology for energy pulse protection, visit <a href=\"https:\/\/istu.ru\/material\/vestnik-izhgtu-imeni-m-t-kalashnikova\/\">www.istu.ru.<\/a> Contents of the journal &#8222;IzhGTU Bulletin&#8220; for 2021 \u2116 4    <\/p>\n<\/div>\n<\/div>\n<\/div>\n<h4><img decoding=\"async\" class=\"lazyload alignnone size-medium wp-image-5215\" src=\"http:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-262x300.jpg\" data-orig-src=\"http:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-262x300.jpg\" alt=\"\" width=\"262\" height=\"300\" srcset=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%27http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%27%20width%3D%27262%27%20height%3D%27300%27%20viewBox%3D%270%200%20262%20300%27%3E%3Crect%20width%3D%27262%27%20height%3D%27300%27%20fill-opacity%3D%220%22%2F%3E%3C%2Fsvg%3E\" data-srcset=\"https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-200x229.jpg 200w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-262x300.jpg 262w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-400x458.jpg 400w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-600x686.jpg 600w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-768x878.jpg 768w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-800x915.jpg 800w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4-895x1024.jpg 895w, https:\/\/www.mwtc.tech\/wp-content\/uploads\/2024\/04\/Project_img_Cizatice4.jpg 904w\" data-sizes=\"auto\" data-orig-sizes=\"(max-width: 262px) 100vw, 262px\" \/><\/h4>\n<div class=\"row case_study_col mbot35\">\n<div class=\"col-lg-12 col-md-12 col-sm-12 col-cs-12\">\n<h4 class=\"fnt_28\"><strong>The Final Output<\/strong><\/h4>\n<p>We will summarise only the most important benefits of fy. MWTC to the modernization of SV transmitter Ci\u017eatice. <\/p>\n<ul class=\"case_study_list\">\n<li style=\"list-style-type: none;\">\n<ul class=\"case_study_list\">\n<li><i class=\"fa fa-hand-o-right\" aria-hidden=\"true\"><\/i>We have solved the problem with reference creation and with high frequency and low frequency ground<\/li>\n<li><i class=\"fa fa-hand-o-right\" aria-hidden=\"true\"><\/i>We have minimized the common mode currents flowing through the wire braids to the transmitter<\/li>\n<li><i class=\"fa fa-hand-o-right\" aria-hidden=\"true\"><\/i>We have located the fault and the high earth resistance in the lightning conductor system. After the repair, the resistance dropped from 22 Ohm to 0.004 Ohm <\/li>\n<li><i class=\"fa fa-hand-o-right\" aria-hidden=\"true\"><\/i>We designed, calculated and mounted L cell suitable to given impedance differences &#8211; coaxial\/monopole<\/li>\n<li><i class=\"fa fa-hand-o-right\" aria-hidden=\"true\"><\/i>We have designed, calculated and laboratory tested the transmitter surge protection<\/li>\n<li><i class=\"fa fa-hand-o-right\" aria-hidden=\"true\"><\/i>We set the PSF close to 1, from 5kW of transmit (forward) power 1 W is returned<\/li>\n<li><i class=\"fa fa-hand-o-right\" aria-hidden=\"true\"><\/i>We measured and verified all important parameters of the transmitter when it was connected to operation and one month after its continuous operation<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<div class=\"col-lg-12 col-md-12 col-sm-12 col-cs-12\"><\/div>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":5755,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"portfolio_category":[55],"portfolio_skills":[],"portfolio_tags":[],"class_list":["post-5751","avada_portfolio","type-avada_portfolio","status-publish","format-standard","has-post-thumbnail","hentry","portfolio_category-transmitters"],"_links":{"self":[{"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/avada_portfolio\/5751","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/avada_portfolio"}],"about":[{"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/types\/avada_portfolio"}],"author":[{"embeddable":true,"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/comments?post=5751"}],"version-history":[{"count":5,"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/avada_portfolio\/5751\/revisions"}],"predecessor-version":[{"id":5760,"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/avada_portfolio\/5751\/revisions\/5760"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/media\/5755"}],"wp:attachment":[{"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/media?parent=5751"}],"wp:term":[{"taxonomy":"portfolio_category","embeddable":true,"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/portfolio_category?post=5751"},{"taxonomy":"portfolio_skills","embeddable":true,"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/portfolio_skills?post=5751"},{"taxonomy":"portfolio_tags","embeddable":true,"href":"https:\/\/www.mwtc.tech\/index.php\/wp-json\/wp\/v2\/portfolio_tags?post=5751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}