{"id":1170,"date":"2021-08-13T04:03:21","date_gmt":"2021-08-13T04:03:21","guid":{"rendered":"https:\/\/toancau.vn\/?p=1170"},"modified":"2025-04-17T07:03:29","modified_gmt":"2025-04-17T07:03:29","slug":"cach-tinh-toan-chong-set","status":"publish","type":"post","link":"https:\/\/toancau.vn\/en\/blog\/cach-tinh-toan-chong-set.html","title":{"rendered":"HOW TO CALCULATE LIGHTNING PROTECTION"},"content":{"rendered":"

S\u00e9t<\/strong><\/span> l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng thi\u00ean nhi\u00ean, \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh trong nh\u1eefng \u0111i\u1ec1u ki\u1ec7n kh\u00ed t\u01b0\u1ee3ng nh\u1ea5t \u0111\u1ecbnh n\u00e0o \u0111\u00f3. Khi c\u00f3 s\u1ef1 ph\u00e2n chia \u0111i\u1ec7n t\u00edch trong c\u00e1c \u0111\u00e1m m\u00e2y, nh\u1eefng ion d\u01b0\u01a1ng g\u1eb7p ion \u00e2m s\u1ebd t\u1ea1o ra tia s\u00e9t, truy\u1ec1n trong kh\u00f4ng kh\u00ed ho\u1eb7c \u0111\u1ea9y xu\u1ed1ng \u0111\u1ea5t, g\u00e2y n\u00ean hi\u1ec7n t\u01b0\u1ee3ng s\u00e9t \u0111\u00e1nh.<\/span><\/p>\n

\"\"<\/p>\n

Lightning is a very dangerous problem for property and human life. Currently, humans have not found a way to prevent electrical discharges in the atmosphere between clouds and between clouds and land, but have found ways to avoid the effects caused by lightning.<\/span><\/p>\n

With a safe lightning protection system for buildings or structures, people will feel secure when lightning strikes. Many companies have also applied and launched lightning protection systems and solutions to improve people's lives. However, the important issue is how to build the most effective and safe lightning protection system?<\/span><\/p>\n

Lightning does not go in a certain direction. Sometimes the flash precedes the lightning (the speed of light is always faster than the speed of sound) in one place, but when the lightning strikes again in another place. Therefore, it is necessary to take timely measures to avoid lightning and its harmful effects.<\/span><\/p>\n

Tr\u01b0\u1edbc h\u1ebft, khi nghe d\u1ef1 b\u00e1o th\u1eddi ti\u1ebft c\u00f3 m\u01b0a hay gi\u00f4ng b\u00e3o, c\u1ea7n l\u00ean k\u1ebf ho\u1ea1ch \u0111\u1ec3 \u0111\u1ec1 ph\u00f2ng s\u00e9t<\/strong>. T\u1ea1i khu v\u1ef1c l\u00e0m vi\u1ec7c, c\u1ea7n \u0111\u1ec3 \u00fd tr\u01b0\u1edbc c\u00e1c n\u01a1i c\u00f3 th\u1ec3 tr\u00fa m\u01b0a v\u00e0 tr\u00e1nh s\u00e9t an to\u00e0n; \u0111\u1ed3ng th\u1eddi ph\u1ea3i t\u00ednh \u0111\u01b0\u1ee3c th\u1eddi gian t\u1eeb ch\u1ed7 l\u00e0m vi\u1ec7c \u0111\u1ebfn n\u01a1i an to\u00e0n.<\/span><\/p>\n

Usually, a thunderstorm comes very quickly, within 15 minutes, and moves at a speed of 40 km\/h. Therefore, if you are in an unsafe place, it is necessary to pay attention to the signs of thunderstorms such as dark clouds, cold air, and wind.<\/span><\/p>\n

Next, it is necessary to apply the rule of sight and hearing. When lightning occurs, first we see a flash of lightning, and then there is a thunderclap. If you calculate the time from the moment the lightning flashes until the thunder is heard, divide that number of seconds by 3, you can determine the distance to the place where the lightning occurred.<\/span><\/p>\n

For example, counting 3 seconds, lightning is 3 divided by 1 km from the standing position. Remember, if the time between seeing lightning and hearing thunder is less than 30 seconds, it means we are already in the \"sight\" of lightning and must be careful. If this time is less than 20 seconds, move to a safer place. Always pay attention to the danger of hearing the first thunderclap, as lightning can strike 15-20km away from where it rains.<\/span><\/p>","protected":false},"excerpt":{"rendered":"

S\u00e9t l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng thi\u00ean nhi\u00ean, \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh trong nh\u1eefng \u0111i\u1ec1u ki\u1ec7n kh\u00ed t\u01b0\u1ee3ng nh\u1ea5t \u0111\u1ecbnh n\u00e0o \u0111\u00f3. Khi c\u00f3 s\u1ef1 ph\u00e2n chia \u0111i\u1ec7n t\u00edch trong c\u00e1c \u0111\u00e1m m\u00e2y, nh\u1eefng ion d\u01b0\u01a1ng g\u1eb7p ion \u00e2m s\u1ebd t\u1ea1o ra tia s\u00e9t, truy\u1ec1n trong kh\u00f4ng kh\u00ed ho\u1eb7c \u0111\u1ea9y xu\u1ed1ng \u0111\u1ea5t, g\u00e2y n\u00ean hi\u1ec7n t\u01b0\u1ee3ng s\u00e9t […]<\/p>","protected":false},"author":3,"featured_media":2820,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rank_math_lock_modified_date":false,"footnotes":""},"categories":[16,7],"tags":[],"class_list":["post-1170","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-tin-tuc-su-kien"],"acf":[],"_links":{"self":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts\/1170","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/comments?post=1170"}],"version-history":[{"count":1,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts\/1170\/revisions"}],"predecessor-version":[{"id":5728,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts\/1170\/revisions\/5728"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/media\/2820"}],"wp:attachment":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/media?parent=1170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/categories?post=1170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/tags?post=1170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}