{"id":424,"date":"2024-08-10T10:55:22","date_gmt":"2024-08-10T08:55:22","guid":{"rendered":"https:\/\/gezhi-tech.com\/?p=424"},"modified":"2025-09-27T17:50:24","modified_gmt":"2025-09-27T15:50:24","slug":"clause-3-how-to-understand-the-definition-of-protective-impedance","status":"publish","type":"post","link":"https:\/\/gezhi-tech.com\/ja\/clause-3-how-to-understand-the-definition-of-protective-impedance\/","title":{"rendered":"\u7b2c 3 \u9805 \u2013 \u300c\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u300d\u306e\u5b9a\u7fa9\u306e\u7406\u89e3\u65b9\u6cd5"},"content":{"rendered":"\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9: \u901a\u5e38\u306e\u4f7f\u7528\u6642\u304a\u3088\u3073\u6a5f\u5668\u306e\u6545\u969c\u306e\u53ef\u80fd\u6027\u304c\u3042\u308b\u72b6\u614b\u3067\u306e\u96fb\u6d41\u304c\u5b89\u5168\u306a\u5024\u306b\u5236\u9650\u3055\u308c\u308b\u3088\u3046\u306b\u3001\u30af\u30e9\u30b9 II \u69cb\u9020\u306e\u5145\u96fb\u90e8\u5206\u3068\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u306a\u5c0e\u96fb\u90e8\u5206\u306e\u9593\u306b\u63a5\u7d9a\u3055\u308c\u305f\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3002<br>\n<br>\n\u30b1\u30fc\u30b91:<br>\u6700\u521d\u306e\u30b1\u30fc\u30b9\u306f\u3001\u901a\u5e38\u3001\u30a2\u30c0\u30d7\u30bf\u30fc\u99c6\u52d5\u306e\u88fd\u54c1\u306a\u3069\u3001\u4f4e\u96fb\u5727\u96fb\u6e90\u3092\u5fc5\u8981\u3068\u3059\u308b\u72b6\u6cc1\u3067\u3059\u3002\u30a2\u30c0\u30d7\u30bf\u30fc\u306e\u51fa\u529b\u96fb\u5727\u306fDC12V\u3001DC24V\u3001\u307e\u305f\u306fDC5V\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u4f4e\u96fb\u5727\u90e8\u54c1\u306f\u3001\u5909\u5727\u5668\u306e\u5909\u5727\u3068\u6574\u6d41\u5668\u96fb\u6d41\u306e\u6574\u6d41\u306b\u3088\u3063\u3066\u5f97\u3089\u308c\u308b\u305f\u3081\u3001\u4e00\u822c\u306b\u30e6\u30fc\u30b6\u30fc\u304c\u89e6\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u9ad8\u96fb\u5727\u90e8\u5206\u3068\u96fb\u5727\u90e8\u5206\u3092\u52b9\u679c\u7684\u306b\u7d76\u7e01\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5f53\u793e\u306e\u4e00\u822c\u7684\u306a\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u96fb\u6e90\u57fa\u677f\u3067\u306f\u3001EMC \u4f1d\u5c0e\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3059\u308b\u3068\u3001\u30c8\u30e9\u30f3\u30b9\u306e\u4e00\u6b21\u5074\u3067\u767a\u751f\u3057\u305f\u5e72\u6e09\u304c\u4e00\u6b21\u5074\u3068\u4e8c\u6b21\u5074\u306e\u9593\u306e\u5bc4\u751f\u5bb9\u91cf\u3092\u901a\u904e\u3057\u3001150k\uff5e30MHz \u306e\u4f1d\u5c0e\u6027\u5e72\u6e09\u304c\u767a\u751f\u3057\u3066\u4e8c\u6b21\u5074\u306b\u5230\u9054\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001Y \u30b3\u30f3\u30c7\u30f3\u30b5\u3092\u4f7f\u7528\u3057\u3066\u5e72\u6e09\u4fe1\u53f7\u3092\u96fb\u6e90\u306b\u623b\u3057\u3001\u5e72\u6e09\u3092\u76f8\u6bba\u3059\u308b\u30eb\u30fc\u30d7\u3092\u5f62\u6210\u3057\u307e\u3059\u3002\u305d\u3046\u3057\u306a\u3044\u3068\u3001\u5c0e\u901a\u30c6\u30b9\u30c8\u304c\u4e0d\u5408\u683c\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306e Y \u30b3\u30f3\u30c7\u30f3\u30b5\u306f\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3092\u5f62\u6210\u3057\u307e\u3059\u3002\u4e0b\u56f3\u306e\u8d64\u3044\u30dc\u30c3\u30af\u30b9\u3067\u9078\u629e\u3055\u308c\u305f 2 \u3064\u306e Y \u30b3\u30f3\u30c7\u30f3\u30b5\u304c\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3067\u3059\u3002<br>\n<figure class=\"wp-block-image size-full\"><br>\n<img loading=\"lazy\" decoding=\"async\" width=\"760\" height=\"363\" src=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/protective-impedance-in-switch-power-supply.jpg\" alt=\"\" class=\"wp-image-425\" srcset=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/protective-impedance-in-switch-power-supply.jpg 760w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/protective-impedance-in-switch-power-supply-300x143.jpg 300w\" sizes=\"auto, (max-width: 760px) 100vw, 760px\" \/><br>\n<\/figure><br>\n\u4e0b\u56f3\u306f\u30de\u30a4\u30ca\u30b9\u30a4\u30aa\u30f3\u767a\u751f\u5668\u306e\u56de\u8def\u56f3\u3067\u3059\u3002\u8d64\u3044\u56db\u89d2\u5f62\u3067\u9078\u629e\u3055\u308c\u305f 2 \u3064\u306e\u62b5\u6297\u306f\u3001\u4e00\u822c\u7684\u306a\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3067\u3059\u3002<br>\n<figure class=\"wp-block-image size-full is-resized\"><br>\n<img loading=\"lazy\" decoding=\"async\" width=\"373\" height=\"245\" src=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/circuit-diagram-for-switch-power-supply.png\" alt=\"\" class=\"wp-image-426\" style=\"width:776px;height:auto\" srcset=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/circuit-diagram-for-switch-power-supply.png 373w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/circuit-diagram-for-switch-power-supply-300x197.png 300w\" sizes=\"auto, (max-width: 373px) 100vw, 373px\" \/><br>\n<\/figure><br>\n\u4e0b\u306e\u56f3\u306eCY1\u3068CY2\u306f\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3067\u3059\u304b?<br>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-image size-full\"><br>\n<img loading=\"lazy\" decoding=\"async\" width=\"290\" height=\"476\" src=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/220V-Negative-Ion-Generator-for-Air-Purifier-Accessories-Parts.png\" alt=\"\" class=\"wp-image-427\" srcset=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/220V-Negative-Ion-Generator-for-Air-Purifier-Accessories-Parts.png 290w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/220V-Negative-Ion-Generator-for-Air-Purifier-Accessories-Parts-183x300.png 183w\" sizes=\"auto, (max-width: 290px) 100vw, 290px\" \/><br>\n<\/figure><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-image size-full\"><br>\n<img loading=\"lazy\" decoding=\"async\" width=\"916\" height=\"675\" src=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator.jpg\" alt=\"\" class=\"wp-image-428\" srcset=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator.jpg 916w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator-300x221.jpg 300w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator-768x566.jpg 768w\" sizes=\"auto, (max-width: 916px) 100vw, 916px\" \/><br>\n<\/figure><\/div><\/div><br>\n\u898f\u683c\u306e\u5b9a\u7fa9\u304b\u3089\u3001\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u63a5\u5730\u304c\u5b58\u5728\u3059\u308b\u30af\u30e9\u30b9 II \u69cb\u9020\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u306e\u63a5\u5730\u304c\u4fdd\u8b77\u63a5\u5730\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u30af\u30e9\u30b9 II \u69cb\u9020\u3067\u4f7f\u7528\u3055\u308c\u3001\u3053\u3053\u3067\u306f\u30af\u30e9\u30b9 I \u69cb\u9020\u3067\u3042\u308b\u305f\u3081\u3001\u660e\u3089\u304b\u306b CY1 \u3068 CY2 \u3092\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u3057\u3066\u5b9a\u7fa9\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u3053\u3067\u306e\u63a5\u5730\u304c\u6a5f\u80fd\u63a5\u5730\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u30012 \u3064\u306e\u554f\u984c\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001\u3053\u308c\u306f\u30af\u30e9\u30b9 I \u69cb\u9020\u3067\u3042\u308b\u305f\u3081\u3001CY1 \u3068 CY2 \u306f\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u3057\u3066\u5b9a\u7fa9\u3067\u304d\u307e\u305b\u3093\u3002\u6b21\u306b\u3001\u30af\u30e9\u30b9 II \u69cb\u9020\u306e\u5834\u5408\u3001CY1 \u3068 CY2 \u3092\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u3057\u3066\u5b9a\u7fa9\u3067\u304d\u3001\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u95a2\u9023\u8981\u4ef6\u3092\u6e80\u305f\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u79c1\u306e\u500b\u4eba\u7684\u306a\u610f\u898b\u306f\u3001CY1 \u3068 CY2 \u306f\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3067\u306f\u306a\u304f\u3001\u76f4\u63a5\u57fa\u790e\u7d76\u7e01\u3068\u307f\u306a\u3057\u3066\u3088\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u7d50\u5c40\u306e\u3068\u3053\u308d\u3001\u56de\u8def\u56f3\u306b\u793a\u3055\u308c\u3066\u3044\u308b\u8a2d\u8a08\u306f\u898f\u683c\u306b\u53d7\u3051\u5165\u308c\u3089\u308c\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3057\u3087\u3046\u304b\uff1f\u305d\u3057\u3066nbsp;<br>\n<figure class=\"wp-block-image size-large\"><br>\n<img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"403\" src=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator-circuit-diagram-1024x403.png\" alt=\"\" class=\"wp-image-429\" srcset=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator-circuit-diagram-1024x403.png 1024w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator-circuit-diagram-300x118.png 300w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator-circuit-diagram-768x302.png 768w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator-circuit-diagram-1536x604.png 1536w, https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/Negative-ion-generator-circuit-diagram.png 1954w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><br>\n<\/figure><br>\n\u305d\u308c\u3089\u304c\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3067\u3042\u308b\u5834\u5408\u3001\u3069\u3061\u3089\u304c\u7b2c 22.42 \u6761\u300c\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u5c11\u306a\u304f\u3068\u3082 2 \u3064\u306e\u5225\u500b\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u69cb\u6210\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u300d\u306b\u6e96\u62e0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<br>\n<figure class=\"wp-block-image is-resized\"><br>\n<img decoding=\"async\" src=\"https:\/\/gezhi-tech.com\/wp-content\/uploads\/2024\/08\/is-it-a-protective-impedance.png\" alt=\"\" style=\"width:716px;height:auto\"\/><br>\n<\/figure><br>\nFrom the definition of the standard, the <a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-protective-impedance\/\" target=\"_blank\"><strong>protective impedance<\/strong><\/a> is used in the <a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-class-ii-construction\/\" target=\"_blank\"><strong>class II construction<\/strong><\/a>, where there is earthing. If the earthing here is defined as protection earthing, then obviously, CY1 and CY2 cannot be defined as protection impedance, because protection impedance is used in class II construction, and here is class I construction. If the earthing&nbsp;here is defined as functional earthing, then there are two problems. First, this is a class I structure, then CY1 and CY2 cannot be defined as protection impedance. Second, if it is a class II structure, CY1 and CY2 can be defined as protection impedance, and then the relevant requirements of protection impedance need to be met. My personal opinion is that CY1 and CY2 are not protective impedances, and we can directly regard them as <a href=\"\/index.php\/clause-3-how-to-understand-the-definition-of-basic-insulation\/\" target=\"_blank\"><strong>basic insulation<\/strong><\/a>. At the end, in other words, the design shown in the circuit diagram is not accepted by the standard?&nbsp;<br>\n<br>\nIf they are protective impedances, then which is need to comply with clause 22.42 &#8211; &#8220;Protective impedance shall consist of at least two separate components.&#8221;.<br>","protected":false},"excerpt":{"rendered":"<p>\u4fdd\u8b77\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9: \u901a\u5e38\u306e\u4f7f\u7528\u6642\u304a\u3088\u3073\u6a5f\u5668\u306e\u6545\u969c\u306e\u53ef\u80fd\u6027\u304c\u3042\u308b\u72b6\u614b\u3067\u306e\u96fb\u6d41\u304c\u5b89\u5168\u306a\u5024\u306b\u5236\u9650\u3055\u308c\u308b\u3088\u3046\u306b\u3001\u30af\u30e9\u30b9 II \u69cb\u9020\u306e\u5145\u96fb\u90e8\u5206\u3068\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u306a\u5c0e\u96fb\u90e8\u5206\u306e\u9593\u306b\u63a5\u7d9a\u3055\u308c\u305f\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3002 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