{"id":2624,"date":"2022-12-03T15:03:23","date_gmt":"2022-12-03T15:03:23","guid":{"rendered":"https:\/\/csiag.eu\/?p=2624"},"modified":"2022-12-29T17:12:51","modified_gmt":"2022-12-29T17:12:51","slug":"selectively-switch-off-power-consumers-when-the-voltage-falls-below-a-minimum-level","status":"publish","type":"post","link":"https:\/\/csiag.eu\/en\/blog\/2022\/12\/03\/selektiv-stromverbraucher-abschalten-bei-unterschreiten-einer-mindestspannung\/","title":{"rendered":"Selectively switch off power consumers when the voltage falls below a minimum"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time<\/span> <span class=\"rt-time\"> &lt; 1<\/span> <span class=\"rt-label rt-postfix\">minute<\/span><\/span>\n<p class=\"wp-block-paragraph\">In order to selectively switch off power consumers when the voltage falls below a minimum, a Homematic DIN rail switching actuator with power measurement is required.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Homematic DIN rail switching actuator with power measurement&nbsp;<a href=\"https:\/\/de.elv.com\/elv-homematic-hutschienen-schaltaktor-mit-leistungsmessung-hm-es-pmsw1-dr-150749\" target=\"_blank\" rel=\"noreferrer noopener\">HM-ES-PMSw1-DR<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The Dometic refrigerators give an acoustic warning signal when the AC supply voltage drops from the usual 230 V to below 195 V. This can be the case when using 25 or 50 m cable drums or a generally weak supply network. Larger consumers then quickly cause a voltage drop, which leads to the acoustic warning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dometic has kindly designed the refrigerator&#039;s circuit so that after disconnecting the 230 V supply voltage and reconnecting it, the refrigerator immediately resumes its 230 V operation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Since in the above listed <a href=\"https:\/\/csiag.eu\/en\/hm_lm-power-measurement\/\" data-type=\"post\" data-id=\"2636\">Performance measurement script <em>HG_LM<\/em><\/a> also the voltage across the variable <code>Var_HG_LM_VOLTAGE<\/code> can be queried, simply inserting the following code into the <code>elseif<\/code>-branches in the above script <em>HM_LSS<\/em>, by means of the top-hat rail switching actuator looped into the phase of the refrigerator <a href=\"https:\/\/de.elv.com\/homematic-1-kanal-schaltaktor-im-hutschienengehaeuse-hm-lc-sw1-dr-141378\" target=\"_blank\" rel=\"noreferrer noopener\">HM-LC-Sw1-DR<\/a>to turn the refrigerator on or off.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The code is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>! Refrigerator OFF<br>if (Var_HG_LM_VOLTAGE &lt; 200)<br>{<br>dom.GetObject(&quot;BidCos-RF.SEQ3114635:1.STATE&quot;).State(0);<br>WriteLine(&quot;Refrigerator OFF&quot;);WriteLine(Var_HG_LM_VOLTAGE);<br>}<\/code><\/p>","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time<\/span> <span class=\"rt-time\"> &lt; 1<\/span> <span class=\"rt-label rt-postfix\">minute<\/span><\/span>A Homematic DIN rail switch actuator with power measurement is required to selectively switch off power consumers when the voltage falls below a minimum level. The Dometic refrigerators emit an acoustic warning signal when the AC supply voltage drops from the usual 230 V to below 195 V. This can be the case if 25 or 50 m cable reels are used or if the supply network is generally weak. Larger consumers then cause...&nbsp;<a href=\"https:\/\/csiag.eu\/en\/blog\/2022\/12\/03\/selektiv-stromverbraucher-abschalten-bei-unterschreiten-einer-mindestspannung\/\" rel=\"bookmark\">Read More \"<span class=\"screen-reader-text\">Selectively switch off power consumers when the voltage falls below a minimum<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[450,346,347],"tags":[445,447,389,460,448,459],"class_list":["post-2624","post","type-post","status-publish","format-standard","hentry","category-leistungsmessung","category-smarthome","category-smarthome-im-wohnmobil","tag-hutschienen-schaltaktor","tag-leistung","tag-leistungsmessung","tag-mindestspanung","tag-spannung","tag-spannungsabfall"],"modified_by":"Achim Goerner","_links":{"self":[{"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/posts\/2624","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/comments?post=2624"}],"version-history":[{"count":0,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/posts\/2624\/revisions"}],"wp:attachment":[{"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/media?parent=2624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/categories?post=2624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csiag.eu\/en\/wp-json\/wp\/v2\/tags?post=2624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}