{"id":50433,"date":"2026-03-27T13:09:11","date_gmt":"2026-03-27T13:09:11","guid":{"rendered":"https:\/\/www.kdmsteel.com\/?p=50433"},"modified":"2026-03-27T13:27:54","modified_gmt":"2026-03-27T13:27:54","slug":"current-transformer-vs-potential-transformer","status":"publish","type":"post","link":"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/","title":{"rendered":"\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\uff1a\u4e3b\u306a\u9055\u3044\u3092\u89e3\u8aac"},"content":{"rendered":"<p>\u914d\u96fb\u76e4\u306e\u88fd\u9020\u3084\u5909\u96fb\u6240\u306e\u4fdd\u5b88\u7ba1\u7406\u3092\u884c\u3046\u969b\u306b\u306f\u3001\u7cbe\u5ea6\u3068\u5b89\u5168\u6027\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3042\u308b\u3053\u3068\u306f\u3054\u5b58\u77e5\u3067\u3057\u3087\u3046\u3002\u5909\u6d41\u5668\uff08CT\uff09\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09\u306b\u300c\u512a\u52a3\u300d\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u3001\u3054\u81ea\u8eab\u306e\u30cb\u30fc\u30ba\u306b\u5408\u3063\u305f\u6a5f\u5668\u3092\u9078\u629e\u3059\u308b\u305f\u3081\u306e\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u76ee\u6b21\u3092\u5207\u308a\u66ff\u3048\u308b\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u30c8\u30b0\u30eb<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#What_Is_a_Current_Transformer_CT\" >\u5909\u6d41\u5668\uff08CT\uff09\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#What_Is_a_Potential_Transformer_PT\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Top_10_Key_Differences_between_Current_Transformer_vs_Potential_Transformer\" >\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u4e3b\u306a\u9055\u3044\u30c8\u30c3\u30d710<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#1_Function_Primary_Purpose\" >1. \u6a5f\u80fd\uff08\u4e3b\u306a\u76ee\u7684\uff09<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#2_Working_Principle_Focus\" >2. \u52d5\u4f5c\u539f\u7406\u306e\u7126\u70b9<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-2\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-2\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#3_Connection_in_Circuit\" >3. \u56de\u8def\u306e\u63a5\u7d9a<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-3\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-3\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#4_Input_Quantity\" >4. \u6295\u5165\u91cf<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-4\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-4\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#5_Output_Range\" >5. \u51fa\u529b\u7bc4\u56f2<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-5\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-5\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#6_Turns_Ratio_Winding_Design\" >6. \u5dfb\u6570\u6bd4\u3068\u5dfb\u7dda\u8a2d\u8a08<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-6\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-6\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#7_Transformer_Type\" >7. \u5909\u5727\u5668\u306e\u7a2e\u985e<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-7\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-7\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#8_Secondary_Circuit_Behavior\" >8. \u4e8c\u6b21\u56de\u8def\u306e\u52d5\u4f5c<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-8\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-8\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#9_Dependency_on_Load_Burden\" >9. \u8ca0\u8377\uff08\u8ca0\u62c5\uff09\u3078\u306e\u4f9d\u5b58\u5ea6<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-9\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-9\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#10_Applications_in_Power_Systems\" >10. \u96fb\u529b\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u5fdc\u7528<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_CT-10\" >\u5909\u6d41\u5668\uff08CT\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Potential_Transformer_PT-10\" >\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Summary_Table_CT_vs_PT_at_a_Glance\" >\u8981\u7d04\u8868\uff1aCT\u3068PT\u306e\u6bd4\u8f03<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Current_Transformer_vs_Potential_Transformer_%E2%80%93_Which_One_Is_Best\" >\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668 \u2013 \u3069\u3061\u3089\u304c\u512a\u308c\u3066\u3044\u308b\u306e\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Get_Your_Customized_Transformer_by_KDM_Steel\" >KDM Steel\u3067\u3042\u306a\u305f\u3060\u3051\u306e\u30ab\u30b9\u30bf\u30e0\u30c8\u30e9\u30f3\u30b9\u3092\u624b\u306b\u5165\u308c\u3088\u3046<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#FAQS\" >\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Why_shouldnt_CT_Extra_be_open\" >CT Extra\u304c\u55b6\u696d\u3057\u3066\u306f\u3044\u3051\u306a\u3044\u7406\u7531\u306f\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Can_CT_and_PT_be_used_instead_of_each_other\" >CT\u3068PT\u306f\u4e92\u3044\u306b\u4ee3\u66ff\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#When_do_CT_and_PT_work_together\" >CT\u3068PT\u306f\u3069\u306e\u3088\u3046\u306a\u5834\u5408\u306b\u9023\u643a\u3057\u3066\u4f5c\u696d\u3092\u884c\u3046\u306e\u3067\u3059\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Which_transformer_is_better_for_you\" >\u3069\u3061\u3089\u306e\u5909\u5727\u5668\u304c\u3042\u306a\u305f\u306b\u3068\u3063\u3066\u6700\u9069\u3067\u3057\u3087\u3046\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-42\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/#Why_are_transformers_for_instruments_important\" >\u8a08\u6e2c\u6a5f\u5668\u7528\u5909\u5727\u5668\u304c\u91cd\u8981\u306a\u7406\u7531\u306f\u4f55\u3067\u3059\u304b\uff1f<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_a_Current_Transformer_CT\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50437\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Current-Transformer-CT.jpg\" alt=\"\u5909\u6d41\u5668\uff08CT\uff09\u3068\u306f\u4f55\u304b\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Current-Transformer-CT.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Current-Transformer-CT-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Current-Transformer-CT-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Current-Transformer-CT-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u9ad8\u3044\u4e00\u6b21\u96fb\u6d41\u3092\u8a08\u6e2c\u3084\u5b89\u5168\u30ea\u30ec\u30fc\u306e\u305f\u3081\u306b\u6a19\u6e96\u7684\u306a\u5b89\u5168\u30ec\u30d9\u30eb\uff08\u901a\u5e38\u306f5A\u307e\u305f\u306f1A\uff09\u307e\u3067\u4e0b\u3052\u308b\u3068\u3001\u3053\u308c\u306f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Current_transformer\"><strong>\u5909\u6d41\u5668<\/strong><\/a> \uff08CT\uff09\u3053\u308c\u3092\u9001\u96fb\u7dda\u3068\u76f4\u5217\u306b\u63a5\u7d9a\u3059\u308b\u3053\u3068\u3067\u3001\u300c\u96fb\u6d41\u4f4e\u6e1b\u88c5\u7f6e\u300d\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u96fb\u6d41\u306e\u6d41\u308c\u3092\u76e3\u8996\u3059\u308b\u3088\u3046\u306a\u3082\u306e\u3067\u3001\u4f4e\u96fb\u5727\u8a08\u3067\u9ad8\u96fb\u5727\u9001\u96fb\u7dda\u3092\u5b89\u5168\u306b\u76e3\u8996\u3059\u308b\u3053\u3068\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_a_Potential_Transformer_PT\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50438\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Potential-Transformer-PT.jpg\" alt=\"\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09\u3068\u306f\u4f55\u304b\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Potential-Transformer-PT.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Potential-Transformer-PT-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Potential-Transformer-PT-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Potential-Transformer-PT-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09\u306e\u5225\u540d\u306f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Voltage_transformer\"><strong>\u96fb\u5727\u5909\u5727\u5668<\/strong><\/a> \uff08VT\uff09\u305d\u306e\u5f79\u5272\u306f\u300111kV\u308433kV\u3068\u3044\u3063\u305f\u9ad8\u96fb\u5727\u3092\u3001\u901a\u5e38\u306e\u4f4e\u96fb\u5727\u3067\u3042\u308b100V\u307e\u305f\u306f110V\u306b\u964d\u5727\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u9001\u96fb\u7dda\u3068\u4e26\u5217\u306b\u63a5\u7d9a\u3055\u308c\u308b\u3068\u3001\u300c\u96fb\u5727\u964d\u4e0b\u300d\u30e2\u30cb\u30bf\u30fc\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u9ad8\u96fb\u5727\u306b\u3088\u308b\u5371\u967a\u304b\u3089\u96fb\u529b\u3092\u4fdd\u8b77\u3057\u3001\u30e1\u30fc\u30bf\u30fc\u3084\u30b9\u30a4\u30c3\u30c1\u304c\u6b63\u78ba\u306a\u96fb\u5727\u5024\u3092\u8aad\u307f\u53d6\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Top_10_Key_Differences_between_Current_Transformer_vs_Potential_Transformer\"><\/span><strong>\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u4e3b\u306a\u9055\u3044\u30c8\u30c3\u30d710<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50439\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Top-10-Key-Differences-between-Current-Transformer-vs-Potential-Transformer.jpg\" alt=\"\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u4e3b\u306a\u9055\u3044\u30c8\u30c3\u30d710\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Top-10-Key-Differences-between-Current-Transformer-vs-Potential-Transformer.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Top-10-Key-Differences-between-Current-Transformer-vs-Potential-Transformer-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Top-10-Key-Differences-between-Current-Transformer-vs-Potential-Transformer-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Top-10-Key-Differences-between-Current-Transformer-vs-Potential-Transformer-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Function_Primary_Purpose\"><\/span><strong>1. \u6a5f\u80fd\uff08\u4e3b\u306a\u76ee\u7684\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u4e3b\u96fb\u6d41\u304c\u6570\u5343\u30a2\u30f3\u30da\u30a2\u306a\u3069\u975e\u5e38\u306b\u9ad8\u3044\u5834\u5408\u3001CT\u306f\u305d\u308c\u30921A\u307e\u305f\u306f5A\u306e\u6a19\u6e96\u7684\u306a\u4e8c\u6b21\u51fa\u529b\u306b\u964d\u5727\u3057\u307e\u3059\u3002\u3053\u306e\u51fa\u529b\u306f\u3001\u96fb\u6d41\u8a08\u3001\u96fb\u529b\u8a08\u3001\u4fdd\u8b77\u30ea\u30ec\u30fc\u306a\u3069\u306b\u7c21\u5358\u306b\u63a5\u7d9a\u3067\u304d\u307e\u3059\u3002CT\u304c\u306a\u3044\u5834\u5408\u3001\u4f7f\u7528\u3059\u308b\u6e2c\u5b9a\u6a5f\u5668\u306f\u5371\u967a\u306a\u91cf\u306e\u96fb\u6d41\u306b\u76f4\u63a5\u3055\u3089\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002CT\u306f\u3001\u5b9f\u969b\u306e\u6c34\u306e\u6d41\u308c\u3092\u5e38\u306b\u76e3\u8996\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>PT\uff08\u5909\u5727\u5668\uff09\u306f\u300111kV\u300133kV\u3001132kV\u3068\u3044\u3063\u305f\u9ad8\u96fb\u5727\u3092\u3001\u5b89\u5168\u3067\u4e00\u822c\u7684\u306a\u4f4e\u96fb\u5727\u3067\u3042\u308b110V\u307e\u305f\u306f120V\u306b\u964d\u5727\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u96fb\u5727\u8a08\u3001\u5468\u6ce2\u6570\u8a08\u3001\u96fb\u5727\u30ea\u30ec\u30fc\u306a\u3069\u3092\u5bb9\u6613\u306b\u63a5\u7d9a\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u9ad8\u96fb\u5727\u6a5f\u5668\u3092\u5236\u5fa1\u76e4\u304b\u3089\u9060\u3056\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u305f\u3081\u3001\u6a5f\u5668\u306e\u30c6\u30b9\u30c8\u304c\u5bb9\u6613\u306b\u306a\u308a\u3001\u975e\u5e38\u306b\u91cd\u8981\u306a\u5229\u70b9\u3068\u306a\u308a\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Working_Principle_Focus\"><\/span><strong>2. \u52d5\u4f5c\u539f\u7406\u306e\u7126\u70b9<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-2\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>CT\u306f\u30b7\u30ea\u30fc\u30ba\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3057\u307e\u3059 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Transformer\"><strong>\u30c8\u30e9\u30f3\u30b9<\/strong><\/a>. \u305d\u306e\u4e3b\u306a\u5f79\u5272\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u304c\u5909\u5316\u3057\u3066\u3082\u6b63\u3057\u3044\u96fb\u6d41\u6bd4\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4e8c\u6b21\u96fb\u6d41\u306e\u51fa\u529b\u306f\u4e3b\u96fb\u6d41\u306b\u3088\u3063\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002\u6545\u969c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3067\u3082\u3001\u51fa\u529b\u304c\u7dda\u5f62\u6027\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4fdd\u8b77\u30ea\u30ec\u30fc\u304c\u77ed\u7d61\u6642\u306b\u30c8\u30ea\u30c3\u30d7\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u6b63\u78ba\u306b\u5224\u65ad\u3059\u308b\u305f\u3081\u306e\u96fb\u6d41\u5024\u3092\u78ba\u5b9f\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-2\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>PT\u306f\u5206\u8def\u5909\u5727\u5668\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3057\u307e\u3059\u3002\u4e3b\u306a\u76ee\u7684\u306f\u3001\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u8a08\u5668\u304c\u3069\u308c\u3060\u3051\u306e\u96fb\u6d41\u3092\u6d88\u8cbb\u3057\u3066\u3082\u3001\u96fb\u5727\u6bd4\u3092\u5e38\u306b\u6b63\u3057\u304f\u4fdd\u3064\u3053\u3068\u3067\u3059\u3002\u4e8c\u6b21\u96fb\u5727\u306f\u4e3b\u96fb\u5727\u306b\u57fa\u3065\u3044\u3066\u7b97\u51fa\u3055\u308c\u307e\u3059\u3002\u540c\u671f\u3001\u8a08\u6e2c\u3001\u304a\u3088\u3073\u96fb\u5727\u30d9\u30fc\u30b9\u306e\u4fdd\u8b77\u65b9\u5f0f\u306b\u304a\u3044\u3066\u306f\u3001PT\u304c\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u306e\u5b89\u5b9a\u3057\u305f\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3055\u308c\u305f\u30b3\u30d4\u30fc\u3092\u63d0\u4f9b\u3057\u3066\u304f\u308c\u308b\u3053\u3068\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Connection_in_Circuit\"><\/span><strong>3. \u56de\u8def\u306e\u63a5\u7d9a<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-3\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>CT\u306f\u3001\u6e2c\u5b9a\u3057\u305f\u3044\u96fb\u6d41\u304c\u6d41\u308c\u308b\u96fb\u7dda\u3068\u76f4\u5217\u306b\u63a5\u7d9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5168\u7dda\u96fb\u6d41\u304cCT\u306e\u4e3b\u5dfb\u7dda\u307e\u305f\u306f\u7a93\u3092\u6d41\u308c\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u56de\u8def\u3092\u906e\u65ad\u305b\u305a\u306bCT\u3092\u8a2d\u7f6e\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u9069\u5207\u306a\u8a2d\u7f6e\u3092\u884c\u3046\u306b\u306f\u3001\u4e3b\u5c0e\u4f53\u306e\u7d4c\u8def\u3092\u7269\u7406\u7684\u306b\u906e\u65ad\u3057\u3001CT\u5185\u90e8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-3\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>PT\u306f\u3001\u9001\u96fb\u7dda\u306e\u3059\u3050\u96a3\u3001\u307e\u305f\u306f\u5411\u304b\u3044\u5074\u306b\u63a5\u7d9a\u3057\u307e\u3059\u3002PT\u306f\u3001\u4e3b\u56de\u8def\u3092\u505c\u6b62\u3059\u308b\u3053\u3068\u306a\u304f\u30012\u3064\u306e\u76f8\u9593\u3001\u307e\u305f\u306f\u76f8\u3068\u63a5\u5730\u9593\u306e\u96fb\u529b\u3092\u53d6\u308a\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u63a5\u7d9a\u65b9\u6cd5\u306f\u96fb\u5727\u8a08\u306e\u63a5\u7d9a\u65b9\u6cd5\u3068\u3088\u304f\u4f3c\u3066\u3044\u307e\u3059\u3002\u4e3b\u6bcd\u7dda\u304b\u3089PT\u306e\u4e00\u6b21\u63a5\u7d9a\u90e8\u306b\u96fb\u4f4d\u30ea\u30fc\u30c9\u7dda\u3092\u63a5\u7d9a\u3059\u308b\u3060\u3051\u3067\u3001\u4e00\u6b21\u96fb\u529b\u306e\u6d41\u308c\u3092\u6b62\u3081\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Input_Quantity\"><\/span><strong>4. \u6295\u5165\u91cf<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-4\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>CT\u306f\u5b9a\u96fb\u6d41\u3092\u5165\u529b\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b\u305f\u3081\u3001\u901a\u5e38\u306e\u8ca0\u8377\u96fb\u6d41\u304b\u3089\u5927\u304d\u306a\u6545\u969c\u96fb\u6d41\u307e\u3067\u3001\u904e\u71b1\u3059\u308b\u3053\u3068\u306a\u304f\u5e83\u3044\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30ec\u30f3\u30b8\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002CT\u306e\u8a2d\u8a08\u306b\u304a\u3044\u3066\u306f\u3001\u3053\u306e\u5024\u306e\u7bc4\u56f2\u3092\u8003\u616e\u306b\u5165\u308c\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002CT\u306f\u3001\u901a\u5e38\u306e\u96fb\u6d41\u306e20\u500d\u306e\u77ed\u7d61\u96fb\u6d41\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3067\u3082\u3001\u96fb\u6d41\u306b\u6bd4\u4f8b\u3057\u305f\u4e8c\u6b21\u4fe1\u53f7\u3092\u9001\u4fe1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-4\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>PT\u306f\u56fa\u5b9a\u96fb\u5727\u3092\u5165\u529b\u3068\u3057\u3066\u53d7\u3051\u53d6\u308a\u3001\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u306e\u00b110%\u3068\u3044\u3046\u72ed\u3044\u7bc4\u56f2\u5185\u3067\u52d5\u4f5c\u3059\u308b\u5834\u5408\u306b\u6700\u3082\u6027\u80fd\u3092\u767a\u63ee\u3057\u307e\u3059\u3002PT\u306f\u3053\u306e\u5b89\u5b9a\u3057\u305f\u96fb\u529b\u4f9b\u7d66\u4e0b\u3067\u6700\u3082\u6027\u80fd\u3092\u767a\u63ee\u3057\u307e\u3059\u3002CT\u306e\u3088\u3046\u306b\u5e38\u306b\u6975\u7aef\u306a\u904e\u96fb\u5727\u72b6\u614b\u306b\u5bfe\u51e6\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u9069\u5207\u306a\u7d76\u7e01\u8a2d\u8a08\u306b\u3088\u308a\u77ed\u6642\u9593\u306e\u30b5\u30fc\u30b8\u96fb\u5727\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Output_Range\"><\/span><strong>5. \u51fa\u529b\u7bc4\u56f2<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-5\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>CT\u306e\u4e8c\u6b21\u5074\u306f\u3001\u4e16\u754c\u4e2d\u30671\u30a2\u30f3\u30da\u30a2\u307e\u305f\u306f5\u30a2\u30f3\u30da\u30a2\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u6a19\u6e96\u5316\u306b\u3088\u308a\u3001\u7570\u306a\u308b\u30e1\u30fc\u30ab\u30fc\u306e\u30e1\u30fc\u30bf\u30fc\u3084\u30ea\u30ec\u30fc\u3092\u518d\u6821\u6b63\u3059\u308b\u3053\u3068\u306a\u304f\u4f75\u7528\u3067\u304d\u307e\u3059\u3002\u901a\u5e38\u3001CT\u3068\u8a08\u6e2c\u30d1\u30cd\u30eb\u9593\u306e\u8ddd\u96e2\u306b\u3088\u3063\u3066\u3069\u3061\u3089\u3092\u4f7f\u7528\u3059\u308b\u304b\u304c\u6c7a\u307e\u308a\u307e\u3059\u3002\u30b1\u30fc\u30d6\u30eb\u640d\u5931\u3092\u6291\u3048\u308b\u305f\u3081\u3001\u77ed\u3044\u8ddd\u96e2\u306b\u306f5A\u3001\u9577\u3044\u8ddd\u96e2\u306b\u306f1A\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-5\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>PT\u306e\u4e8c\u6b21\u51fa\u529b\u306f\u3001\u304a\u4f4f\u307e\u3044\u306e\u5730\u57df\u306e\u898f\u683c\u306b\u57fa\u3065\u3044\u3066110V\u307e\u305f\u306f120V\u306e\u3044\u305a\u308c\u304b\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u5b89\u5b9a\u3057\u305f\u51fa\u529b\u306b\u306f\u3001\u5e02\u8ca9\u306e\u8a08\u6e2c\u6a5f\u5668\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u5668\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002IEC\u898f\u683c\u3067\u306f110V\u304c\u6a19\u6e96\u3067\u3059\u304c\u3001ANSI\u898f\u683c\u3067\u306f120V\u304c\u6a19\u6e96\u3067\u3059\u3002\u3053\u306e\u7d71\u4e00\u6027\u306b\u3088\u308a\u3001\u3059\u3079\u3066\u306e\u62e0\u70b9\u3067\u6a5f\u5668\u306e\u8cfc\u5165\u3084\u4ea4\u63db\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_Turns_Ratio_Winding_Design\"><\/span><strong>6. \u5dfb\u6570\u6bd4\u3068\u5dfb\u7dda\u8a2d\u8a08<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-6\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>CT\u306e\u4e3b\u5dfb\u7dda\u306f\u5dfb\u6570\u304c\u5c11\u306a\u304f\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u7a93\u3092\u901a\u308b1\u672c\u306e\u30d0\u30b9\u30d0\u30fc\u307e\u305f\u306f\u30ef\u30a4\u30e4\u306e\u307f\u3067\u3059\u3002\u4e00\u65b9\u3001\u4e8c\u6b21\u5dfb\u7dda\u306f\u900f\u78c1\u7387\u306e\u9ad8\u3044\u30b3\u30a2\u306b\u591a\u6570\u306e\u5dfb\u7dda\u304c\u5dfb\u304b\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u9ad8\u3044\u5dfb\u6570\u6bd4\u306b\u3088\u308a\u3001\u96fb\u6d41\u964d\u4e0b\u52b9\u679c\u304c\u751f\u3058\u307e\u3059\u3002\u7269\u7406\u8a2d\u8a08\u306b\u304a\u3044\u3066\u306f\u3001\u4e8c\u6b21\u96fb\u6d41\u306e\u6b63\u78ba\u306a\u6e2c\u5b9a\u3092\u78ba\u4fdd\u3057\u3064\u3064\u3001\u4e00\u6b21\u5074\u306e\u8a2d\u7f6e\u3092\u53ef\u80fd\u306a\u9650\u308a\u7c21\u7d20\u5316\u3059\u308b\u3053\u3068\u306b\u91cd\u70b9\u3092\u7f6e\u3044\u3066\u3044\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-6\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09\u306e\u4e3b\u5dfb\u7dda\u306f\u3001\u9ad8\u96fb\u5727\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u7d30\u3044\u7d76\u7e01\u96fb\u7dda\u3092\u591a\u6570\u5dfb\u304d\u4ed8\u3051\u3066\u4f5c\u3089\u308c\u3066\u3044\u307e\u3059\u3002\u4e8c\u6b21\u30b3\u30a4\u30eb\u306f\u96fb\u5727\u3092\u4e0b\u3052\u308b\u305f\u3081\u306b\u5dfb\u6570\u3092\u6e1b\u3089\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u5efa\u7269\u306b\u306f\u3001\u614e\u91cd\u306a\u7d76\u7e01\u8a2d\u8a08\u304c\u5fc5\u8981\u3067\u3059\u3002\u4e3b\u5dfb\u7dda\u306f\u3001\u7d76\u7e01\u7834\u58ca\u3092\u8d77\u3053\u3059\u3053\u3068\u306a\u304f\u3001\u901a\u5e38\u306e\u96fb\u5727\u3068\u77ed\u6642\u9593\u306e\u904e\u96fb\u5727\u306e\u4e21\u65b9\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7_Transformer_Type\"><\/span><strong>7. \u5909\u5727\u5668\u306e\u7a2e\u985e<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-7\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u6280\u8853\u7684\u306b\u8a00\u3048\u3070\u3001CT\u306f\u6607\u5727\u5909\u5727\u5668\u3067\u3059\u3002\u4e3b\u56de\u8def\u3067\u306f\u4f4e\u96fb\u5727\u30fb\u5927\u96fb\u6d41\u3092\u5165\u529b\u3068\u3057\u3066\u53d7\u3051\u53d6\u308a\u3001\u4e8c\u6b21\u5074\u3067\u306f\u9ad8\u96fb\u5727\u30fb\u4f4e\u96fb\u6d41\u3092\u51fa\u529b\u3057\u307e\u3059\u3002\u4e8c\u6b21\u5074\u304c\u958b\u653e\u72b6\u614b\u306b\u306a\u308b\u3068\u5371\u967a\u306a\u306e\u306f\u3053\u306e\u305f\u3081\u3067\u3059\u3002\u96fb\u5727\u304c\u975e\u5e38\u306b\u9ad8\u304f\u306a\u308a\u3001\u611f\u96fb\u6b7b\u306b\u81f3\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002\u3053\u306e\u5206\u985e\u3092\u7406\u89e3\u3059\u308c\u3070\u3001\u4e8c\u6b21\u5074\u77ed\u7d61\u30d6\u30ed\u30c3\u30af\u304c\u306a\u305c\u5fc5\u8981\u306a\u5b89\u5168\u88c5\u7f6e\u306a\u306e\u304b\u304c\u7406\u89e3\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-7\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u304a\u6301\u3061\u306ePT\u306f\u964d\u5727\u5909\u5727\u5668\u3067\u3059\u3002\u4e3b\u5074\u3067\u9ad8\u96fb\u5727\u30fb\u4f4e\u96fb\u6d41\u3092\u5165\u529b\u3068\u3057\u3066\u53d7\u3051\u53d6\u308a\u3001\u4e8c\u6b21\u5074\u3067\u4f4e\u96fb\u5727\u30fb\u9ad8\u96fb\u6d41\u3092\u51fa\u529b\u3057\u307e\u3059\u3002\u6a19\u6e96\u7684\u306a\u964d\u5727\u8a2d\u8a08\u306e\u305f\u3081\u3001\u305d\u306e\u52d5\u4f5c\u306f\u4e88\u6e2c\u53ef\u80fd\u3067\u3059\u3002\u4e8c\u6b21\u5074\u306e\u63a5\u7d9a\u90e8\u3092\u77ed\u7d61\u3055\u305b\u306a\u3044\u9650\u308a\u3001\u6a19\u6e96\u7684\u306a\u96fb\u5727\u8a08\u3084\u30ea\u30ec\u30fc\u3092\u63a5\u7d9a\u3057\u3066\u3082\u5b89\u5168\u3067\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"8_Secondary_Circuit_Behavior\"><\/span><strong>8. \u4e8c\u6b21\u56de\u8def\u306e\u52d5\u4f5c<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-8\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>CT\u306e\u4e8c\u6b21\u5074\u306f\u3001\u5fc5\u305a\u77ed\u7d61\u3055\u305b\u308b\u304b\u3001\u4f4e\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u8ca0\u8377\u306b\u63a5\u7d9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4e00\u6b21\u5074\u304c\u901a\u96fb\u3057\u3066\u3044\u308b\u72b6\u614b\u3067\u4e8c\u6b21\u5074\u3092\u958b\u304f\u3068\u3001\u30b3\u30a2\u306e\u78c1\u675f\u304c\u505c\u6b62\u3057\u3001\u63a5\u70b9\u9593\u306b\u5371\u967a\u306a\u9ad8\u96fb\u5727\uff08\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u6570\u5343\u30dc\u30eb\u30c8\uff09\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u7d76\u7e01\u3092\u7834\u58ca\u3057\u3001\u4eba\u8eab\u4e8b\u6545\u306b\u3064\u306a\u304c\u308b\u6050\u308c\u304c\u3042\u308a\u307e\u3059\u3002CT\u306e\u4e8c\u6b21\u5074\u914d\u7dda\u3092\u53d6\u308a\u5916\u3059\u524d\u306b\u306f\u3001\u5fc5\u305a\u77ed\u7d61\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-8\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09\u306e\u4e8c\u6b21\u5074\u3092\u77ed\u7d61\u3055\u305b\u306a\u3044\u3053\u3068\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u4e8c\u6b21\u5074\u304c\u77ed\u7d61\u3059\u308b\u3068\u3001\u6545\u969c\u96fb\u6d41\u304cPT\u306e\u5185\u90e8\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306b\u3088\u3063\u3066\u306e\u307f\u5236\u9650\u3055\u308c\u308b\u76f4\u7dda\u7d4c\u8def\u304c\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u975e\u5e38\u306b\u5927\u304d\u306a\u96fb\u6d41\u304c\u6d41\u308c\u3001\u5dfb\u7dda\u5468\u8fba\u306e\u7d76\u7e01\u4f53\u304c\u904e\u71b1\u3059\u308b\u3068\u6025\u901f\u306b\u6eb6\u878d\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002PT\u306e\u4e8c\u6b21\u5074\u30e9\u30a4\u30f3\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u3001\u9069\u5207\u306a\u5b9a\u683c\u306e\u30d2\u30e5\u30fc\u30ba\u307e\u305f\u306f\u56de\u8def\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u5fc5\u305a\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"9_Dependency_on_Load_Burden\"><\/span><strong>9. \u8ca0\u8377\uff08\u8ca0\u62c5\uff09\u3078\u306e\u4f9d\u5b58\u5ea6<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-9\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5b9a\u683cVA\u5bb9\u91cf\u306e\u7bc4\u56f2\u5185\u3067\u3042\u308c\u3070\u3001\u4e8c\u6b21\u8ca0\u8377\u306fCT\u306e\u7cbe\u5ea6\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u305b\u3093\u3002\u3057\u304b\u3057\u3001\u30c7\u30d0\u30a4\u30b9\u3092\u8ffd\u52a0\u3057\u3059\u304e\u308b\u3068\u3001CT\u30b3\u30a2\u304c\u904e\u8ca0\u8377\u306b\u306a\u308a\u3001\u6bd4\u7387\u306e\u8a08\u7b97\u306b\u8aa4\u308a\u304c\u751f\u3058\u307e\u3059\u3002\u6545\u969c\u6642\u306b\u306f\u3001\u5b89\u5168\u30ea\u30ec\u30fc\u304c\u5168\u304f\u52d5\u4f5c\u3057\u306a\u3044\u304b\u3001\u8aa4\u3063\u305f\u52d5\u4f5c\u3092\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002CT\u56de\u8def\u3092\u8a2d\u8a08\u3059\u308b\u524d\u306b\u3001\u5fc5\u305a\u5168\u4f53\u306e\u8ca0\u8377\u3092\u628a\u63e1\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-9\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u4e8c\u6b21\u8ca0\u8377\u306f\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09\u306e\u7cbe\u5ea6\u306b\u76f4\u63a5\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u4f55\u3089\u304b\u306e\u7406\u7531\u3067\u3001\u8a08\u5668\u3084\u30b9\u30a4\u30c3\u30c1\u3092PT\u306b\u63a5\u7d9a\u3059\u308b\u3068\u96fb\u5727\u51fa\u529b\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u6bd4\u7387\u8aa4\u5dee\u304c\u767a\u751f\u3057\u3001\u8a08\u5668\u306e\u7cbe\u5ea6\u3084\u5b89\u5168\u8a2d\u5b9a\u304c\u5909\u308f\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002PT\u304c\u898f\u5b9a\u306e\u7cbe\u5ea6\u30af\u30e9\u30b9\u5185\u3067\u52d5\u4f5c\u3059\u308b\u3088\u3046\u306b\u3059\u308b\u306b\u306f\u3001PT\u306b\u63a5\u7d9a\u3059\u308b\u8ca0\u8377\u3092\u614e\u91cd\u306b\u5236\u5fa1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"10_Applications_in_Power_Systems\"><\/span><strong>10. \u96fb\u529b\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u5fdc\u7528<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Current_Transformer_CT-10\"><\/span><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u4f8b\u3048\u3070\u3001\u96fb\u6d41\u8a08\u3001\u96fb\u529b\u30a2\u30ca\u30e9\u30a4\u30b6\u30fc\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u30e1\u30fc\u30bf\u30fc\u3001\u904e\u96fb\u6d41\u30ea\u30ec\u30fc\u3001\u5dee\u52d5\u5b89\u5168\u65b9\u5f0f\u3001\u71b1\u304a\u3088\u3073 <a href=\"https:\/\/www.kdmsteel.com\/ja\/\u96fb\u6c17\u904e\u8ca0\u8377\u3068\u306f\u4f55\u3067\u3059\u304b\/\"><strong>\u96fb\u6c17\u7684\u306a\u904e\u8ca0\u8377<\/strong><\/a> \u30c7\u30d0\u30a4\u30b9\u306f\u3059\u3079\u3066\u96fb\u6d41\u30d9\u30fc\u30b9\u306e\u30c7\u30d0\u30a4\u30b9\u3067\u3042\u308a\u3001CT \u306f\u305d\u308c\u3089\u306b\u306e\u307f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002 <a href=\"https:\/\/www.kdmsteel.com\/ja\/\u4f4e\u96fb\u5727\u30b9\u30a4\u30c3\u30c1\u30ae\u30a2\/\"><strong>\u4f4e\u96fb\u5727\u958b\u9589\u88c5\u7f6e<\/strong><\/a>, CT\uff08\u96fb\u6d41\u30c8\u30e9\u30f3\u30b9\uff09\u306f\u3001\u96fb\u529b\u306e\u53d7\u96fb\u3068\u9001\u96fb\u3092\u884c\u3046\u5404\u76f8\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u30de\u30fc\u30b1\u30c6\u30a3\u30f3\u30b0\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u3001\u305d\u3057\u3066\u53ce\u76ca\u3092\u6e2c\u5b9a\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Potential_Transformer_PT-10\"><\/span><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>PT\u306f\u3001\u96fb\u5727\u8a08\u3001\u5468\u6ce2\u6570\u8a08\u3001\u540c\u671f\u8a08\u3001\u96fb\u5727\u30ea\u30ec\u30fc\u3078\u306e\u96fb\u529b\u4f9b\u7d66\u3001\u96fb\u5727\u4f4e\u4e0b\u6642\u306e\u5b89\u5168\u5bfe\u7b56\u306a\u3069\u3001\u96fb\u5727\u30d9\u30fc\u30b9\u306e\u30bf\u30b9\u30af\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002PT\u306f\u3001\u5909\u96fb\u6240\u3067\u4e26\u5217\u63a5\u7d9a\u3055\u308c\u305f\u767a\u96fb\u6a5f\u3084\u9001\u96fb\u7dda\u306b\u540c\u671f\u4fe1\u53f7\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u96fb\u529b\uff08kW\uff09\u3092\u6e2c\u5b9a\u3057\u3001\u65b9\u5411\u6027\u4fdd\u8b77\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u5b9a\u3059\u308b\u306b\u306f\u3001\u540c\u3058\u8a08\u5668\u306bCT\u5165\u529b\u3068PT\u5165\u529b\u306e\u4e21\u65b9\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Summary_Table_CT_vs_PT_at_a_Glance\"><\/span><strong>\u8981\u7d04\u8868\uff1aCT\u3068PT\u306e\u6bd4\u8f03<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50440\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Summary-Table-CT-vs-PT-at-a-Glance.jpg\" alt=\"\u8981\u7d04\u8868\uff1aCT\u3068PT\u306e\u6bd4\u8f03\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Summary-Table-CT-vs-PT-at-a-Glance.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Summary-Table-CT-vs-PT-at-a-Glance-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Summary-Table-CT-vs-PT-at-a-Glance-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Summary-Table-CT-vs-PT-at-a-Glance-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<table width=\"648\">\n<tbody>\n<tr>\n<td><strong>\u7279\u5fb4<\/strong><\/td>\n<td><strong>\u5909\u6d41\u5668\uff08CT\uff09<\/strong><\/td>\n<td><strong>\u8a08\u5668\u7528\u5909\u5727\u5668\uff08PT\uff09<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>\u4e3b\u8981\u6a5f\u80fd<\/strong><\/td>\n<td>\u9ad8\u96fb\u6d41\u30921A\/5A\u306b\u964d\u5727\u3057\u307e\u3059<\/td>\n<td>\u9ad8\u96fb\u5727\u3092110V\/120V\u306b\u964d\u5727\u3057\u307e\u3059<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7e4b\u304c\u308a<\/strong><\/td>\n<td>\u30e9\u30a4\u30f3\u306e\u30b7\u30ea\u30fc\u30ba<\/td>\n<td>\u7dda\u3068\u5e73\u884c\u306b<\/td>\n<\/tr>\n<tr>\n<td><strong>\u30d7\u30e9\u30a4\u30de\u30ea\u30fc\u30bf\u30fc\u30f3<\/strong><\/td>\n<td>\u5c11\u306a\u3044\uff08\u3057\u3070\u3057\u3070\uff09 <a href=\"https:\/\/www.kdmsteel.com\/ja\/\u5358\u76f8\u5909\u5727\u5668\/\"><strong>\u5358\u76f8\u5909\u5727\u5668<\/strong><\/a>)<\/td>\n<td>\u591a\u304f\u306e<\/td>\n<\/tr>\n<tr>\n<td><strong>\u4e8c\u6b21\u7684\u306a\u30bf\u30fc\u30f3<\/strong><\/td>\n<td>\u591a\u304f\u306e<\/td>\n<td>\u5c11\u3057<\/td>\n<\/tr>\n<tr>\n<td><strong>\u4e8c\u6b21\u7684\u5371\u967a<\/strong><\/td>\n<td>\u958b\u56de\u8def\uff08\u9ad8\u96fb\u5727\u304c\u767a\u751f\u3059\u308b\uff09<\/td>\n<td>\u77ed\u7d61\uff08\u5927\u96fb\u6d41\u304c\u767a\u751f\u3059\u308b\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u8ca0\u62c5\u4f9d\u5b58\u6027<\/strong><\/td>\n<td>\u4f4e\uff08\u5b9a\u96fb\u6d41\u6e90\uff09<\/td>\n<td>\u9ad8\uff08\u8ca0\u8377\u304c\u9ad8\u3044\u307b\u3069\u7cbe\u5ea6\u304c\u4f4e\u4e0b\u3059\u308b\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5909\u5727\u5668\u306e\u7a2e\u985e<\/strong><\/td>\n<td>\u6607\u5727\u30c8\u30e9\u30f3\u30b9<\/td>\n<td>\u964d\u5727\u30c8\u30e9\u30f3\u30b9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Current_Transformer_vs_Potential_Transformer_%E2%80%93_Which_One_Is_Best\"><\/span><strong>\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668 \u2013 \u3069\u3061\u3089\u304c\u512a\u308c\u3066\u3044\u308b\u306e\u304b\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50441\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Current-Transformer-vs-Potential-Transformer-\u2013-Which-One-Is-Best.jpg\" alt=\"\u96fb\u6d41\u5909\u5727\u5668 vs \u8a08\u5668\u5909\u5727\u5668 \u2013 \u3069\u3061\u3089\u304c\u512a\u308c\u3066\u3044\u308b\u304b\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Current-Transformer-vs-Potential-Transformer-\u2013-Which-One-Is-Best.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Current-Transformer-vs-Potential-Transformer-\u2013-Which-One-Is-Best-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Current-Transformer-vs-Potential-Transformer-\u2013-Which-One-Is-Best-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Current-Transformer-vs-Potential-Transformer-\u2013-Which-One-Is-Best-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u3069\u3061\u3089\u304c\u300c\u6700\u9069\u300d\u3068\u3044\u3046\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u305d\u308c\u305e\u308c\u306b\u91cd\u8981\u306a\u5f79\u5272\u304c\u3042\u308a\u307e\u3059\u3002CT\u304b\u3089PT\u306b\u3001\u3042\u308b\u3044\u306f\u305d\u306e\u9006\u306b\u5207\u308a\u66ff\u3048\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3069\u3061\u3089\u3092\u9078\u3076\u304b\u306f\u3001\u5b8c\u5168\u306b\u30cb\u30fc\u30ba\u306b\u57fa\u3065\u3044\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002\u5b89\u5168\u30ea\u30ec\u30fc\u3084\u30e1\u30fc\u30bf\u30fc\u306e\u96fb\u6d41\u3092\u6e2c\u5b9a\u3059\u308b\u306b\u306fCT\u304c\u5fc5\u8981\u3067\u3059\u3002\u540c\u671f\u3084\u96fb\u5727\u8a08\u306e\u96fb\u5727\u3092\u6e2c\u5b9a\u3059\u308b\u306b\u306fPT\u304c\u5fc5\u8981\u3067\u3059\u3002\u30ad\u30ed\u30ef\u30c3\u30c8\u6570\u3092\u8a08\u7b97\u3059\u308b\u306a\u3069\u3001\u5b8c\u5168\u306a\u96fb\u529b\u8ffd\u8de1\u3092\u884c\u3046\u306b\u306f\u3001\u4e21\u65b9\u3092\u540c\u6642\u306b\u52d5\u4f5c\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Get_Your_Customized_Transformer_by_KDM_Steel\"><\/span><strong>KDM Steel\u3067\u3042\u306a\u305f\u3060\u3051\u306e\u30ab\u30b9\u30bf\u30e0\u30c8\u30e9\u30f3\u30b9\u3092\u624b\u306b\u5165\u308c\u3088\u3046<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50442\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Get-Your-Customized-Transformer-by-KDM-Steel.jpg\" alt=\"KDM Steel\u3067\u3042\u306a\u305f\u3060\u3051\u306e\u30ab\u30b9\u30bf\u30e0\u30c8\u30e9\u30f3\u30b9\u3092\u624b\u306b\u5165\u308c\u3088\u3046\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Get-Your-Customized-Transformer-by-KDM-Steel.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Get-Your-Customized-Transformer-by-KDM-Steel-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Get-Your-Customized-Transformer-by-KDM-Steel-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Get-Your-Customized-Transformer-by-KDM-Steel-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u96fb\u529b\u30b7\u30b9\u30c6\u30e0\u3054\u3068\u306b\u72ec\u81ea\u306e\u30cb\u30fc\u30ba\u304c\u3042\u308b\u3053\u3068\u3092\u79c1\u305f\u3061\u306f\u77e5\u3063\u3066\u3044\u307e\u3059\u3002 <a href=\"https:\/\/www.kdmsteel.com\/ja\/\">KDM\u30b9\u30c1\u30fc\u30eb<\/a>. \u5b89\u5168\u5bfe\u7b56\u7528\u306e\u9ad8\u7cbe\u5ea6\u5909\u6d41\u5668\u304b\u3089\u3001\u8a08\u6e2c\u7528\u306e\u9ad8\u7cbe\u5ea6\u8a08\u5668\u307e\u3067\u3001\u304a\u5ba2\u69d8\u306e\u30cb\u30fc\u30ba\u306b\u5408\u308f\u305b\u305f\u30ab\u30b9\u30bf\u30e0\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u3054\u63d0\u4f9b\u3044\u305f\u3057\u307e\u3059\u3002\u4fe1\u983c\u6027\u3001\u5b89\u5168\u6027\u3001\u52b9\u7387\u6027\u306f\u3001\u5f53\u793e\u306e\u8c4a\u5bcc\u306a\u77e5\u8b58\u306b\u3088\u3063\u3066\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u307e\u3059\u3002. <a href=\"https:\/\/www.kdmsteel.com\/ja\/\u63a5\u89e6\/\"><strong>\u304a\u554f\u3044\u5408\u308f\u305b<\/strong><\/a> \u4eca\u3059\u3050\u3001\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u30cb\u30fc\u30ba\u306b\u3064\u3044\u3066\u304a\u8a71\u3057\u3057\u307e\u3057\u3087\u3046\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQS\"><\/span><strong>\u3088\u304f\u3042\u308b\u8cea\u554f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Why_shouldnt_CT_Extra_be_open\"><\/span><strong>CT Extra\u304c\u55b6\u696d\u3057\u3066\u306f\u3044\u3051\u306a\u3044\u7406\u7531\u306f\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4e00\u6b21\u5074\u304c\u30aa\u30f3\u306e\u72b6\u614b\u3067CT\u306e\u4e8c\u6b21\u5074\u3092\u958b\u304f\u3068\u3001\u30b3\u30a2\u304c\u98fd\u548c\u72b6\u614b\u306b\u306a\u308a\u3001\u5371\u967a\u306a\u9ad8\u96fb\u5727\u30b9\u30d1\u30a4\u30af\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u611f\u96fb\u3084\u7d76\u7e01\u7834\u58ca\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u975e\u5e38\u306b\u5371\u967a\u3067\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_CT_and_PT_be_used_instead_of_each_other\"><\/span><strong>CT\u3068PT\u306f\u4e92\u3044\u306b\u4ee3\u66ff\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u304b\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3044\u3044\u3048\u3001\u305d\u308c\u3089\u306f\u4e92\u3044\u306b\u76f8\u53cd\u3059\u308b\u50cd\u304d\u3092\u3057\u307e\u3059\u3002\u4e00\u65b9\u306f\u96fb\u5727\u3092\u4e0b\u3052\u3001\u3082\u3046\u4e00\u65b9\u306f\u96fb\u6d41\u3092\u4e0b\u3052\u307e\u3059\u3002\u5b89\u5168\u8981\u4ef6\u3001\u69cb\u9020\u3001\u63a5\u7d9a\u65b9\u6cd5\u306a\u3069\u3001\u57fa\u672c\u7684\u306b\u4e92\u63db\u6027\u304c\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"When_do_CT_and_PT_work_together\"><\/span><strong>CT\u3068PT\u306f\u3069\u306e\u3088\u3046\u306a\u5834\u5408\u306b\u9023\u643a\u3057\u3066\u4f5c\u696d\u3092\u884c\u3046\u306e\u3067\u3059\u304b\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3053\u308c\u3089\u306f\u3001\u96fb\u529b\u3068\u96fb\u5727\u306e\u4e21\u65b9\u304c\u5fc5\u8981\u306a\u72b6\u6cc1\u3067\u4f75\u7528\u3055\u308c\u307e\u3059\u3002\u96fb\u529b\u8a08\u3001\u65b9\u5411\u6027\u904e\u96fb\u6d41\u30ea\u30ec\u30fc\u3001\u96fb\u529b\u4f1a\u793e\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u8a08\u6e2c\u753b\u9762\u306a\u3069\u304c\u305d\u306e\u4f8b\u3067\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Which_transformer_is_better_for_you\"><\/span><strong>\u3069\u3061\u3089\u306e\u5909\u5727\u5668\u304c\u3042\u306a\u305f\u306b\u3068\u3063\u3066\u6700\u9069\u3067\u3057\u3087\u3046\u304b\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3069\u3061\u3089\u3082\u6b63\u3057\u304f\u884c\u3048\u3070\u5b89\u5168\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u306b\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u3002CT\u306f\u958b\u3044\u3066\u3044\u308b\u3068\u5371\u967a\u3067\u3042\u308a\u3001PT\u306f\u77ed\u3044\u3068\u5371\u967a\u3067\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_are_transformers_for_instruments_important\"><\/span><strong>\u8a08\u6e2c\u6a5f\u5668\u7528\u5909\u5727\u5668\u304c\u91cd\u8981\u306a\u7406\u7531\u306f\u4f55\u3067\u3059\u304b\uff1f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6a19\u6e96\u7684\u306a\u4f4e\u96fb\u5727\u8a08\u6e2c\u5668\u306f\u3001\u9ad8\u96fb\u5727\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5168\u306a\u6e2c\u5b9a\u3068\u4fdd\u8b77\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u8a08\u6e2c\u5668\u306f\u3001\u5371\u967a\u306a\u4e00\u6b21\u56de\u8def\u3092\u5236\u5fa1\u6a5f\u5668\u304b\u3089\u5206\u96e2\u3059\u308b\u3053\u3068\u3067\u3001\u5236\u5fa1\u6a5f\u5668\u306e\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>When you&#8217;re generating switchgear or taking care of a power substation, you know that accuracy and safety are very important. There is no &#8220;better&#8221; device between a Current Transformer (CT) and a Potential Transformer (PT). This article will help you to differentiate between current transformers and potential transformers and choose according to your requirements. What [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":50443,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"disabled","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50433","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Current Transformer vs Potential Transformer: Key Differences Explained - KDM Steel<\/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.kdmsteel.com\/ja\/\u5909\u6d41\u5668\u3068\u8a08\u5668\u7528\u5909\u5727\u5668\u306e\u6bd4\u8f03\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Current Transformer vs Potential Transformer: Key Differences Explained - KDM Steel\" \/>\n<meta property=\"og:description\" content=\"When you&#8217;re generating switchgear or taking care of a power substation, you know that accuracy and safety are very important. 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