{"id":11655,"date":"2026-10-09T00:27:13","date_gmt":"2026-10-08T16:27:13","guid":{"rendered":"https:\/\/subian-electric.com\/?p=11655"},"modified":"2026-10-09T00:29:56","modified_gmt":"2026-10-08T16:29:56","slug":"differential-protection-of-transformer","status":"publish","type":"post","link":"https:\/\/subian-electric.com\/ko\/blog\/differential-protection-of-transformer\/","title":{"rendered":"\ubcc0\uc555\uae30\uc758 \ucc28\ub3d9 \ubcf4\ud638"},"content":{"rendered":"<p>\uacbd\ud5d8\uc774 \ud48d\ubd80\ud55c \ub9b4\ub808\uc774 \uc5d4\uc9c0\ub2c8\uc5b4\uc5d0\uac8c \uc804\ub825 \ubcc0\uc555\uae30\uc5d0\uc11c \uc11c\ube44\uc2a4\uc5d0\uc11c \uc808\ub300 \uc81c\uac70\ub418\uc9c0 \uc54a\uc744 \ubcf4\ud638 \ub9b4\ub808\uc774\uc5d0 \ub300\ud574 \ubb3c\uc5b4\ubcf4\uba74, \ud56d\uc0c1 \ucc28\ub3d9 \ub9b4\ub808\uc774\ub77c\ub294 \ub2f5\ubcc0\uc774 \ub3cc\uc544\uc62c \uac83\uc785\ub2c8\ub2e4. \ud53c\ub354\ub294 \uc7ac\ud3d0\uc1c4 \uac00\ub2a5\ud558\uace0 \ubc84\uc2a4\ubc14\ub294 \ubd84\ub9ac\ud560 \uc218 \uc788\uc9c0\ub9cc, \uc790\ub3d9\uc73c\ub85c \ucc28\ub2e8\ub418\uc9c0 \uc54a\uc740 \ubcc0\uc555\uae30 \uace0\uc7a5\uc740 \ud0f1\ud06c \ud30c\uc5f4, \uae30\ub984 \ud654\uc7ac \ubc0f \uc7a5\uae30 \uc815\uc804\uc73c\ub85c \uc774\uc5b4\uc9d1\ub2c8\ub2e4. \ucc28\ub3d9 \ubcf4\ud638\ub294 \uc774\ub7ec\ud55c \uc720\ud615\uc758 \uace0\uc7a5\uc5d0 \ub300\ud574 \uac00\uc7a5 \ube60\ub974\uace0 \uc120\ud0dd\uc801\uc778 \ubcf4\ud638\ub97c \uc81c\uacf5\ud558\ubbc0\ub85c \ud604\ub300\uc758 \ucc28\ub3d9 \ub9b4\ub808\uc774\ub294 20\ubc00\ub9ac\ucd08 \uc774\ub0b4\uc5d0 \uc791\ub3d9\ud569\ub2c8\ub2e4.<\/p>\n<p>\uc774\uc81c \uc6b0\ub9ac\ub294 \uad6c\uc5ed\uc774 \ud3ec\ud568\ud558\ub294 \uac83, \ub9b4\ub808\uc774\uac00 \uacb0\uc815\uc744 \ub0b4\ub9ac\ub294 \ubc29\ubc95, \ubcf4\ud638 \uc124\uc815\uc774 \ubb34\uc5c7\uc778\uc9c0, \uadf8\ub9ac\uace0 \ud574\ub2f9 \ubcc0\uc555\uae30\uc758 \uad8c\uc120 \uc124\uacc4\uc5d0 \ub530\ub77c CT\uac00 \uc5b4\ub5bb\uac8c \ubc30\uc120\ub418\ub294\uc9c0\ub97c \uc2e4\uc6a9\uc801\uc778 \uc6a9\uc5b4\ub85c \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4. \ubcc0\uc555\uae30\ub098 \ub9b4\ub808\uc774\uac00 \uc544\ub2cc \ub9b4\ub808\uc774 \ud328\ub110\uc744 \ucc3e\uace0 \uc788\ub2e4\uba74, \ub9c8\uc9c0\ub9c9 \ub450 \ub2e8\ub77d\uc774 \ub2f9\uc2e0\uc5d0\uac8c \ud765\ubbf8\ub85c\uc6b8 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<blockquote><p>\uac04\ub2e8\ud55c \ub2f5\ubcc0: \ubcc0\uc555\uae30 \ucc28\ub3d9 \ubcf4\ud638\ub294 \ubcc0\uc555\uae30\ub85c \ub4e4\uc5b4\uc624\ub294 \uc804\ub958\ub97c \ubcc0\uc555\uae30\uc5d0\uc11c \ub098\uac00\ub294 \uc804\ub958\uc640 \ube44\uad50\ud558\uc5ec \uc791\ub3d9\ud569\ub2c8\ub2e4. \ubaa8\ub4e0 \uac83\uc774 \uc815\uc0c1\uc774\ub77c\uba74 \ub450 \uc804\ub958\ub294 \ub3d9\uc77c\ud560 \uac83\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uc804\ub958\uac00 \ubd88\uade0\ud615\ud558\uba74 \ub9b4\ub808\uc774\uac00 \uc791\ub3d9\ud569\ub2c8\ub2e4. \ud574\ub2f9 ANSI \ucf54\ub4dc\ub294 87T\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ub9ce\uc740 \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ub294 \ubcc0\uc555\uae30 \uc815\uaca9 \uc804\ub958\uc758 \uc57d 20-30%\uc5d0\uc11c \ud53d\uc5c5\uc774 \uc124\uc815\ub41c \ube44\uc728 \ud3b8\ud5a5 \ucc28\ub3d9 \ubcf4\ud638 \ud68c\ub85c\uac00 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p><\/blockquote>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-11656\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/10\/Differential-Protection-of-Transformer.webp\" alt=\"\ubcc0\uc555\uae30\uc758 \ucc28\ub3d9 \ubcf4\ud638\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>\ubcf4\ud638\ud558\ub294 \uad6c\uc5ed \u2014 \uadf8\ub9ac\uace0 \uac00\uc7a5 \uc911\uc694\ud55c \uacbd\uacc4<\/h2>\n<p>\ucc28\ub3d9 \ubcf4\ud638 \uc2dc\uc2a4\ud15c\uc740 \ub450 \uc138\ud2b8\uc758 \uc804\ub958 \ubcc0\ud658\uae30 \uc0ac\uc774\uc5d0 \uc704\uce58\ud55c \ubaa8\ub4e0 \uae30\uacc4\ub97c \ubcf4\ud638\ud569\ub2c8\ub2e4. \ub450 \uad8c\uc120\uc774 \uc788\ub294 \ubcc0\uc555\uae30\uc5d0 \uad00\ud574\uc11c\ub294, \uc774\ub294 \uad8c\uc120, \ucf54\uc5b4, \ud0ed \uccb4\uc778\uc800, \ub0b4\ubd80 \ubc30\uc120 \ubc0f CT \uc124\uce58 \uc9c0\uc810\uae4c\uc9c0\uc758 \ubd80\uc2f1\uc744 \ud3ec\ud568\ud569\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ubcc0\uc555\uae30\uc5d0 \uc804\ub825\uc744 \uacf5\uae09\ud558\ub294 \ub2e4\uc6b4\ub77c\uc778 \ud53c\ub354 \ubc0f \uace0\uc804\uc555 \ubc84\uc2a4 \uc2dc\uc2a4\ud15c\uc740 \uc774\ub7ec\ud55c \ubc30\uce58\uc5d0 \ud3ec\ud568\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc774\uac83\uc774 \ubc14\ub85c \uc804\ub958 \ubcc0\ud658\uae30\ub97c \ubc30\uce58\ud558\ub294 \uac83\uc774 \uc804\uccb4 \uc2dc\uc2a4\ud15c \uc124\uacc4\uc5d0\uc11c \uac00\uc7a5 \uc911\uc694\ud55c \uce21\uba74\uc77c \uc218 \uc788\ub294 \uc774\uc720\uc785\ub2c8\ub2e4. \uace0\uc804\uc555 CT\uac00 \ubcc0\uc555\uae30\uc5d0\uc11c \ub108\ubb34 \uba40\ub9ac \uc704\uce58\ud558\uba74, \uc2a4\uc704\uce58\ub8f8\uacfc \ubcc0\uc555\uae30 \uc0ac\uc774\uc758 \uc804\uc120\uc5d0\uc11c \ubc1c\uc0dd\ud558\ub294 \ubaa8\ub4e0 \uace0\uc7a5\uc740 \ucc28\ub3d9 \ub9b4\ub808\uc774\uc640 \ubcc0\uc555\uae30\uc758 \ubc94\uc704\ub97c \ubc97\uc5b4\ub098\uac8c \ub418\uba70, \ud574\ub2f9 \uc804\uc120 \uad6c\uac04\uc744 \ucee4\ubc84\ud558\uae30 \uc704\ud574 \ucd94\uac00\uc801\uc778 \uc9c0\ub77d \ub610\ub294 \uacfc\uc804\ub958 \ubcf4\ud638 \uc7a5\uce58\uac00 \ud544\uc694\ud569\ub2c8\ub2e4. \ub450 \uc804\ub958 \ubcc0\ud658\uae30\ub97c \ubcc0\uc555\uae30\uc5d0 \ucd5c\ub300\ud55c \uac00\uae5d\uac8c \ubc30\uce58\ud558\uba74 \uac04\uaca9\uc774 \uc0ac\uc2e4\uc0c1 \uc81c\uac70\ub429\ub2c8\ub2e4.<\/p>\n<h2>\ucc28\ub3d9 \uc6d0\ub9ac\uac00 \uc791\ub3d9\ud558\ub294 \ubc29\ubc95<\/h2>\n<p>\uac1c\ub150\uc740 \ub180\ub78d\ub3c4\ub85d \uac04\ub2e8\ud569\ub2c8\ub2e4. \uc2e4\uc81c \ubcc0\uc555\uae30 \uc6d0\ub9ac\ub294 \uc911\uc694\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uac04\ub2e8\ud788 \ub9d0\ud574, \ubcc0\uc555\uae30\ub294 \uc804\ub958 \uc804\uc1a1 \uc7a5\uce58\ub85c \uc124\uba85\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c CT\uc758 2\ucc28 \uce21 \uc804\ub958\ub294 \ub3d9\uc77c\ud574\uc57c \ud569\ub2c8\ub2e4. \uadf8\ub7f0 \ub2e4\uc74c \ub9b4\ub808\uc774\ub294 \ube44\uc815\uc0c1 \ub610\ub294 \ucc28\uc774\ub97c \u201c\ucc3e\uc2b5\ub2c8\ub2e4\u201d, \uc774\ub294 \uc874\uc7ac\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uadf8 \ub3d9\ub4f1\uc131\uc740 CT \uc790\uccb4\uac00 \uc62c\ubc14\ub974\uac8c \ud06c\uae30 \uc870\uc815\ub418\uace0 \ubc30\uc120\ub41c \uacbd\uc6b0\uc5d0\ub9cc \uc720\uc9c0\ub418\uba70, \uc774\ub294 \u0441\u0445\u0435\u043c\uc774 CT \ud68c\ub85c\uc5d0\uc11c \ubc1c\uc0dd\ud55c \ubaa8\ub4e0 \uc2e4\uc218\ub97c \uc0c1\uc18d\ubc1b\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4 \u2014 \uc77c\ubc18\uc801\uc778 <a href=\"https:\/\/subian-electric.com\/ko\/blog\/current-transformer-connection\/\">\ubcf4\ud638 \ud68c\ub85c\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 CT \uc5f0\uacb0 \ubc29\ubc95<\/a> \ub2e4\ub978 \ubaa8\ub4e0 \uac83\ubcf4\ub2e4 \uba3c\uc800 \uc62c\ubc14\ub974\uac8c \uc124\uc815\ud560 \uac00\uce58\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc791\ub3d9 \uc804\ub958\ub294 \uae30\ubcf8\uc801\uc73c\ub85c \uc804\ub958 \ubcc0\uc555\uae30\uac00 \uc0dd\uc131\ud55c \ub450 \uac1c\uc758 2\ucc28 \uc804\ub958\uc758 \ubca1\ud130 \ud569\uc785\ub2c8\ub2e4:<\/p>\n<p>Iop= |I1\ucd08\u2013 I2\ucd08|<\/p>\n<p>\ubcc0\uc555\uae30 \ub0b4\ubd80\uc5d0 \uacb0\ud568\uc774 \ubc1c\uc0dd\ud55c \ud6c4, \ubcc0\uc555\uae30\uac00 \uace0\ub824\ud558\uc9c0 \uc54a\uc740 \uc138 \ubc88\uc9f8 \uc694\uc18c\uac00 \ub098\ud0c0\ub098\ubbc0\ub85c, \ud569\uacc4\ub294 \ub354 \uc774\uc0c1 0\uc774 \ub420 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ubcc0\uc555\uae30\ub294 \ud56d\uc0c1 \uc790\ud654 \ubd84\uae30\ub97c \uac00\uc9c0\uace0 \uc788\uae30 \ub54c\ubb38\uc5d0 \uc0c1\ud669\uc744 \ubcf5\uc7a1\ud558\uac8c \ub9cc\ub4dc\ub294 \ub450 \uac00\uc9c0 \uc694\uc18c\uac00 \uc788\uc2b5\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc2dc\uc2a4\ud15c\uc774 \uc81c\ub300\ub85c \uc791\ub3d9\ud560 \ub54c\uc5d0\ub3c4 \uc791\uc740 \ubd88\uade0\ud615\uc774 \uc874\uc7ac\ud558\uba70, \uc774\ub294 \uc2e4\uc81c\ub85c \ub204\ucd9c \ub610\ub294 \ubd88\uc77c\uce58 \uc804\ub958\uc785\ub2c8\ub2e4. \ub3d9\uc77c\ud55c \uc0c1\ud669\uc5d0 \uc9c1\uba74\ud55c \ubaa8\ub4e0 \ubcc0\uc555\uae30\uc5d0 \ub300\ud574 \ubcc0\uc555\uae30 \ube44\uc728\uacfc \ud0ed \uc7a5\ube44\uc758 \uc791\ub3d9\uc774 \uc77c\ubc18\uc801\uc73c\ub85c \ub3d9\uc77c\ud558\uc9c0 \uc54a\ub2e4\ub294 \uc810\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\uc785\ub2c8\ub2e4.<\/p>\n<p>\ub530\ub77c\uc11c \uc624\ub298\ub0a0 \uc0dd\uac01\ud574\ub0bc \uc218 \uc788\ub294 \uc720\uc6a9\ud55c \ub9b4\ub808\uc774\ub294 \ud3b8\ud5a5\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uac01 \uc804\ub958 \ubcc0\uc555\uae30\uac00 \ub450 \uc804\ub958 \uc911 \ub354 \ud070 \uac12(\ub610\ub294 \ud3c9\uade0\uac12)\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc81c\uc9c0 \uc804\ub958\ub97c \uc0dd\uc131\ud55c\ub2e4\ub294 \uc810\uc744 \uc5b8\uae09\ud560 \uac00\uce58\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uc815\uc0c1 \uc870\uac74\uc5d0\uc11c \uc791\uc740 \ucc28\uc774\uac00 \uc788\ub354\ub77c\ub3c4 \uc804\ub958\uac00 \uc81c\uc9c0 \uc804\ub958\uc758 \ud55c\uacc4 \ub0b4\uc5d0 \uba38\ubb3c\ub7ec \uc788\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4. \uc2e4\uc81c \uacb0\ud568\uc774 \uc874\uc7ac\ud560 \ub54c \ub9b4\ub808\uc774\ub294 \uc644\ubcbd\ud558\uac8c \uc791\ub3d9\ud569\ub2c8\ub2e4.<\/p>\n<p>\ub610\ud55c \ub300\ubd80\ubd84\uc758 \ub9b4\ub808\uc774\ub294 \ub9e4\uc6b0 \ub192\uc740 \uc804\ub958 \uc218\uc900(\ud0ed \uc7a5\ube44 \uc218\uc900\uc758 \ucd5c\ub300 20\ubc30)\uc5d0\uc11c \uc989\uc2dc \ubc18\uc751\ud558\ub294 \ud2b9\ubcc4\ud55c \uc694\uc18c\ub97c \ud3ec\ud568\ud569\ub2c8\ub2e4. \uc774 \uc694\uc18c\ub294 \ub9e4\uc6b0 \ub192\uc740 \uacb0\ud568 \uc804\ub958 \uc218\uc900\uc5d0\uc11c \ud55c\ucabd\uc758 \uc804\ub958 \ubcc0\uc555\uae30\uac00 \ub108\ubb34 \ud3ec\ud654\ub418\uc5b4 \ud3b8\ud5a5 \uce21\uc815\uc774 \uc2e4\ud328\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\uc5d0 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-11657\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/10\/How-the-differential-principle-works.webp\" alt=\"\ucc28\ub3d9 \uc6d0\ub9ac\uac00 \uc791\ub3d9\ud558\ub294 \ubc29\ubc95\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>\uc2e4\uc81c\ub85c \uc0ac\uc6a9\ub418\ub294 \ube44\uc728 \ud3b8\ud5a5 \uc124\uc815<\/h2>\n<p>\ub9b4\ub808\uc774 \ub9e4\ub274\uc5bc\uc740 \ub9ce\uc740 \ubcc0\ub3d9\uc131\uc744 \ubcf4\uc5ec\uc8fc\uba70, \uc774\ub294 \ub9b4\ub808\uc774 \ucee4\ubbf8\uc154\ub2dd \uccb4\ud06c\ub9ac\uc2a4\ud2b8\uc5d0 \uc9c1\uba74\ud588\uc744 \ub54c \uadf8\ub9ac \uc720\uc6a9\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c\uc740 \ud45c\uc900 87T \ub9b4\ub808\uc774\uc5d0 \ub300\ud574 \uc2e4\uc81c\ub85c \uac00\uc7a5 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \uc124\uc815\uc785\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\ud53d\uc5c5 (Id \ub610\ub294 Is1): \uc815\uaca9 \ubcc0\uc555\uae30 \uc804\ub958 \uc218\uc900\uc758 20\u201330%. CT\uac00 \uc800\uae09\uc774\uac70\ub098 \ubd80\ud558\uac00 \ubd88\uade0\ud615\uc778 \uacbd\uc6b0 30%\ub97c \uc120\ud0dd\ud558\uace0, CT\uc640 \ubc30\uc120\uc774 \uc798 \ub9de\ub294 \uacbd\uc6b0\uc5d0\ub9cc 20% \uc124\uc815\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n<li>\uae30\uc6b8\uae30 1: \uc815\uc0c1 \ubd80\ud558\uc640 \uc911\uac04 \uacb0\ud568\uc5d0 \ud574\ub2f9\ud558\ub294 \ubc94\uc704 1\uc758 \uacbd\uc6b0 25\u201340%\uc785\ub2c8\ub2e4.<\/li>\n<li>\uae30\uc6b8\uae30 2: \uacb0\ud568 \uc804\ub958\uac00 \uc815\uaca9 \uc804\ub958\ubcf4\ub2e4 \uc57d 2\u20134\ubc30 \ub192\uc740 \uacbd\uc6b0 \ubc94\uc704 2\uc5d0 \ub300\ud574 50\u201380%\uc785\ub2c8\ub2e4. \uc774 \ubc94\uc704\ub294 \uc2ec\uac01\ud55c \uc678\ubd80 \uacb0\ud568 \ub3d9\uc548 CT \ud3ec\ud654\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4.<\/li>\n<li>\uc81c2 \uace0\uc870\ud30c \ucc28\ub2e8: 15\u201320%, \ub9b4\ub808\uc774\uac00 \uc720\uc785 \ud604\uc0c1\uc5d0 \uc758\ud574 \ud2b8\ub9ac\uac70\ub418\uc9c0 \uc54a\ub3c4\ub85d \ucc28\ub2e8\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<li>\uc81c5 \uace0\uc870\ud30c \ucc28\ub2e8: 20\u201335%, \uacfc\ub3c4 \uc790\uadf9\uc5d0\uc11c \uc791\ub3d9\ud560 \ub54c \ucc28\ub2e8\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<li>\uc21c\uac04\uc801\uc778 \ub192\uc740 \uc124\uc815: 8\u201320 \u00d7 \ud0ed, \uace0\uc870\ud30c \ucc28\ub2e8 \uc5c6\uc74c.<\/li>\n<\/ul>\n<p>\ub450 \ubc88\uc9f8 \uace0\uc870\ud30c \uc124\uc815\ub3c4 \uacbd\uace0\uac00 \ud544\uc694\ud558\ub2e4. \uae30\uc874\uc758 \ucc28\ub2e8 \ubc29\uc2dd\uc740 \uace0\uc870\ud30c\uac00 \uc720\uc785 \uc804\ub958\uc5d0 \uc874\uc7ac\ud55c\ub2e4\uace0 \uac00\uc815\ud558\ub294 \uac83 \uac19\ub2e4. \uace0\uc2e4\ub9ac\ucf58 \uac15\ucca0\uc744 \uc0ac\uc6a9\ud558\ub294 \uc804\ud1b5\uc801\uc778 \ucf54\uc5b4 \uae30\uc220\uc740 \uc774 \uc804\uc81c\ub97c \uae30\ubc18\uc73c\ub85c \uc791\ub3d9\ud558\uc9c0\ub9cc, \ube44\uc815\uc9c8 \uae08\uc18d\uacfc \uac19\uc740 \uace0\uae09 \ubcc0\uc555\uae30 \ucf54\uc5b4 \uae30\uc220\uc740 \uc720\uc785 \uc804\ub958\uc5d0\uc11c \ub450 \ubc88\uc9f8 \uace0\uc870\ud30c\uc758 \uc874\uc7ac\ub97c \uadf9\uc801\uc73c\ub85c \uc904\uc600\ub2e4. \ub530\ub77c\uc11c \uc774\ub7ec\ud55c \ubcc0\uc555\uae30\uc5d0\uc11c 15%\uc5d0\uc11c \ub9b4\ub808\uc774\ub97c \ucc28\ub2e8\ud558\uba74 \uc5d0\ub108\uc9c0\ub97c \uacf5\uae09\ud55c \ud6c4 \uc798\ubabb\ub41c \ud2b8\ub9bd\uc774 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub2e4. \uc77c\ubc18\uc801\uc778 \uc194\ub8e8\uc158\uc740 \uc720\uc785 \uc804\ub958\uc5d0 \ub300\ud55c \uad50\ucc28 \ucc28\ub2e8 \ub610\ub294 \ud30c\ud615 \uae30\ubc18 \uac10\uc9c0\ub97c \ud3ec\ud568\ud55c\ub2e4. \ub530\ub77c\uc11c \uc190\uc2e4\uc774 \uc801\uc740 \ubcc0\uc555\uae30\uc5d0 \ub300\ud55c \ub9b4\ub808\uc774\ub97c \uc9c0\uc815\ud560 \uacbd\uc6b0, \uacf5\uae09\uc5c5\uccb4\uac00 \uc5b4\ub5a4 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud558\ub294\uc9c0 \ubc18\ub4dc\uc2dc \ud655\uc778\ud574\uc57c \ud55c\ub2e4.<\/p>\n<h2>\ub378\ud0c0, \uc640\uc774 \ubc0f \uc9c0\uadf8\uc7ac\uadf8 \uad8c\uc120\uc5d0 \ub300\ud55c CT \uc5f0\uacb0<\/h2>\n<p>\uc5ec\uae30\uc5d0\uc11c \uc6b0\ub9ac\ub294 \uace0\uc804\uc801\uc778 \u0441\u0445\u0435\u043c\uacfc \ud604\ub300\uc801\uc778 \u0441\u0445\u0435\u043c\uc758 \ucc28\uc774\uc810\uacfc \ub9ce\uc740 \uc2dc\uc6b4\uc804 \uc624\ub958\uc758 \uc6d0\uc778\uc744 \ubcfc \uc218 \uc788\ub2e4.<\/p>\n<p>\uace0\uc804\uc801\uc778 \uc804\uc790\uae30 \u0441\u0445\u0435\u043c\uc5d0\uc11c CT \uc5f0\uacb0\uc740 \ubcc0\uc555\uae30\uc758 \uc5f0\uacb0\uacfc \ub3d9\uc77c\ud558\ub2e4. Dyn11 \ubcc0\uc555\uae30\uc758 \uace0\uc804\uc555 \uce21 CT\ub294 \uc2a4\ud0c0 \uc5f0\uacb0\uc744 \uac00\uc9c0\uace0 \uc788\uc73c\uba70 \uc800\uc804\uc555 \uce21 CT\ub294 \ub378\ud0c0 \uc5f0\uacb0\uc744 \uac00\uc9c0\uace0 \uc788\ub2e4. \ub378\ud0c0 \uc5f0\uacb0\uc740 \ub450 \uac00\uc9c0 \ubb38\uc81c\ub97c \ub3d9\uc2dc\uc5d0 \ud574\uacb0\ud55c\ub2e4: \ubcc0\uc555\uae30\uc758 \ub378\ud0c0 \uad8c\uc120\uc73c\ub85c \uc778\ud574 \ubc1c\uc0dd\ud558\ub294 30\ub3c4 \uc704\uc0c1 \uc774\ub3d9\uc744 \ucde8\uc18c\ud558\uace0 \uc678\ubd80 \uc9c0\ub77d \uace0\uc7a5\uc774 \uc788\uc744 \ub54c \ub9b4\ub808\uc774\ub97c \ud1b5\uacfc\ud558\ub294 \uc81c\ub85c \uc21c\ud658 \uc804\ub958\ub97c \ucc28\ub2e8\ud55c\ub2e4.<\/p>\n<p>\uc218\uce58 \ub9b4\ub808\uc774\uc5d0\uc11c\ub294 \ubaa8\ub4e0 CT\uac00 \uc2a4\ud0c0 \uc5f0\uacb0\ub85c \uc5f0\uacb0\ub41c\ub2e4. \uc704\uc0c1 \uc774\ub3d9, \ube44\uc728 \uc77c\uce58 \ubc0f \uc81c\ub85c \uc21c\ud658 \ud544\ud130\ub9c1\uc740 \uc18c\ud504\ud2b8\uc6e8\uc5b4\uc5d0 \uc758\ud574 \uc218\ud589\ub41c\ub2e4. \ub530\ub77c\uc11c \ubc30\uc120\uc774 \uac04\ub2e8\ud574\uc9c0\uace0 \ud14c\uc2a4\ud2b8\uac00 \uc26c\uc6cc\uc9c0\uc9c0\ub9cc, \uc885\uc885 \uac04\uacfc\ub418\ub294 \ud55c \uac00\uc9c0 \ud3ec\uc778\ud2b8\uac00 \uc0dd\uae34\ub2e4: \ub9b4\ub808\uc774\ub294 \ud558\ub4dc\uc6e8\uc5b4\uc5d0\uc11c \ub378\ud0c0 \uc5f0\uacb0\uc774 \ud588\ub358 \uac83\ucc98\ub7fc \uc18c\ud504\ud2b8\uc6e8\uc5b4\ub97c \ud1b5\ud574 \uc81c\ub85c \uc21c\ud658 \uc804\ub958\ub97c \ucc28\ub2e8\ud574\uc57c \ud55c\ub2e4. \uc774 \ud544\ud130\ub97c \ud65c\uc131\ud654\ud558\uc9c0 \uc54a\uc73c\uba74 CT \ud68c\ub85c\uac00 \uc678\ubd80 \uc9c0\ub77d \uace0\uc7a5\uc758 \uc601\ud5a5\uc744 \ubc1b\uc544 \ub9b4\ub808\uc774\uac00 \ud2b8\ub9bd\ub420 \uc218 \uc788\ub2e4. \uc124\uc815\uc744 \ud655\uc778\ud558\ub294 \uac83\uc774 \uc911\uc694\ud558\ub2e4; \ub300\ubd80\ubd84\uc758 \ud68c\uc0ac\uac00 \uc774\ub97c \uc81c\uacf5\ud558\uc9c0\ub9cc \uae30\ubcf8\uc801\uc73c\ub85c \ud65c\uc131\ud654\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc740 \uacbd\uc6b0\uac00 \ub9ce\ub2e4.<\/p>\n<p>\uae30\uc220\uc5d0 \uad00\uacc4\uc5c6\uc774 \uc138 \uac00\uc9c0 \uaddc\uce59\uc744 \uc900\uc218\ud574\uc57c \ud55c\ub2e4:<\/p>\n<ul>\n<li>\ube44\uc728\uc774 \uc77c\uce58\ud574\uc57c \ud55c\ub2e4. CT \ube44\uc728\uc740 \uc815\uaca9 \ud0ed\uc5d0\uc11c \uc591\ucabd\uc758 \uc804\ub958\uac00 10% \uac00\uae4c\uc6cc\uc9c0\ub3c4\ub85d \uc120\ud0dd\ud574\uc57c \ud558\uba70, \uc774\ub97c \ud1b5\ud574 \uc5ec\uc720\ub97c \uc783\uc9c0 \uc54a\ub3c4\ub85d \ud574\uc57c \ud55c\ub2e4.<\/li>\n<li>\ud0ed \uccb4\uc778\uc800\ub97c \uace0\ub824\ud574\uc57c \ud55c\ub2e4. \u00b110% \ud0ed\uc744 \uac00\uc9c4 \ubcc0\uc555\uae30\ub294 \ub05d\uc5d0\uc11c \ub05d\uae4c\uc9c0 20%\uc758 \ube44\uc728\uc744 \ubcc0\uacbd\ud558\uba70, \uc774 \ucc28\uc774\ub294 \ub9b4\ub808\uc774\uc758 \uae30\uc6b8\uae30 \ud2b9\uc131\uc5d0\uc11c \uace0\ub824\ub418\uc5b4\uc57c \ud55c\ub2e4; \ub108\ubb34 \uac00\ud30c\ub974\uac8c \ub9cc\ub4e4\uba74 \ubbfc\uac10\ub3c4\uac00 \ud76c\uc0dd\ub41c\ub2e4.<\/li>\n<li>\uadf9\uc131\uc744 \ub530\ub77c\uc57c \ud55c\ub2e4. \uad00\ub840\uc0c1 \ubaa8\ub4e0 CT\ub294 \ubcc0\uc555\uae30\ub97c \ud5a5\ud558\uace0 \uc788\ub2e4. CT \uc30d \uc911 \ud558\ub098\uc758 \ubc29\ud5a5\uc744 \ubcc0\uacbd\ud558\uba74 \ucc28\uc774 \ub300\uc2e0 \ub9b4\ub808\uc774\uac00 \ucd1d \uc804\ub958\ub97c \uc778\uc2dd\ud558\uac8c \ub41c\ub2e4.<\/li>\n<\/ul>\n<p>\uc775\uc219\ud558\uc9c0 \uc54a\uc740 \uc7a5\uce58\uc758 \ubc30\uc120\uc744 \uc791\uc5c5\ud558\ub294 \uacbd\uc6b0, <a href=\"https:\/\/subian-electric.com\/ko\/blog\/transformer-delta-wye-how-to-wire-it\/\">\ubcc0\uc555\uae30 \ub378\ud0c0 \ubc0f \uc640\uc774 \uc5f0\uacb0\uc744 \ubc30\uc120\ud558\ub294 \ubc29\ubc95<\/a> \ub3d9\uc77c\ud55c \ubb38\uc81c\uc758 \uad8c\uc120 \uce21\uc744 \ub2e4\ub8e8\uba70, \uc774\ub294 \ub3c4\uba74\uc744 \uba85\ud310\uacfc \ube44\uad50\ud560 \ub54c \uc720\uc6a9\ud558\ub2e4.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-11658\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/10\/Differential-versus-REF-\u2014-and-where-the-scheme-falls-short.webp\" alt=\"\ucc28\ub3d9 \ub300 REF \u2014 \uadf8\ub9ac\uace0 \u0441\u0445\u0435\u043c\uc774 \ubd80\uc871\ud55c \ubd80\ubd84\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>\ucc28\ub3d9 \ub300 REF \u2014 \uadf8\ub9ac\uace0 \u0441\u0445\u0435\u043c\uc774 \ubd80\uc871\ud55c \ubd80\ubd84<\/h2>\n<p>\uc81c\ud55c\ub41c \uc9c0\ub77d \ubcf4\ud638\ub294 ANSI 64REF \ub610\ub294 \ub2e8\uc21c\ud788 REF\ub77c\uace0\ub3c4 \ud558\uba70, \u201c\ud558\ub098\uc758 \uad8c\uc120\uc5d0 \ub300\ud55c \ucc28\ub3d9 \ubcf4\ud638\u201d\ub77c\uace0 \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 REF\uac00 \ud558\ub098\uc758 \uad8c\uc120\uc758 \uc2a4\ud0c0 \ud3ec\uc778\ud2b8\ub85c \ud750\ub974\ub294 \uc804\ub958\ub97c \uce21\uc815\ud558\uace0 \uc704\uc0c1 CT\ub97c \ud1b5\ud574 \ub3cc\uc544\uc624\ub294 \uc804\ub958\uc640 \ube44\uad50\ud558\ub294 \uace0\uc784\ud53c\ub358\uc2a4 \ubc29\uc2dd\uc774\uae30 \ub54c\ubb38\uc5d0 \uc0ac\uc2e4\uc785\ub2c8\ub2e4. \ud558\ub098\uc758 \uad8c\uc120\uc5d0\uc11c\ub9cc \uc804\ub958\ub97c \uac10\uc9c0\ud558\ubbc0\ub85c \uc804\uccb4 \ucc28\ub3d9 \ubc29\uc2dd\ubcf4\ub2e4 \ud6e8\uc52c \ub354 \ubbfc\uac10\ud558\uba70, \uc77c\ubc18\uc801\uc73c\ub85c \uc57d 10\ubc30 \ub354 \ubbfc\uac10\ud569\ub2c8\ub2e4.<\/p>\n<p>\ub450 \uac00\uc9c0\uac00 \ubaa8\ub450 \ud544\uc694\ud55c \uc774\uc720\ub294 \ubb34\uc5c7\uc785\ub2c8\uae4c? \ud558\ub098\uc758 \uc2a4\ud0c0 \uad8c\uc120\uc758 \uc911\uc131\uc810 \uadfc\ucc98\uc5d0\uc11c \ubc1c\uc0dd\ud558\ub294 \uc9c0\ub77d \uace0\uc7a5 \uacbd\uc6b0, \uc804\ub958\uac00 \uc791\uace0 \ub300\ubd80\ubd84\uc774 \ucc28\ub3d9 \uad6c\uc5ed\uc744 \ud1b5\uacfc\ud558\uae30\ubcf4\ub2e4\ub294 \uad8c\uc120 \uc790\uccb4\uc5d0\uc11c \uc21c\ud658\ud558\uac8c \ub429\ub2c8\ub2e4. \uc804\uccb4 87T \ub9b4\ub808\uc774\ub294 \uc774\ub97c \uac10\uc9c0\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. REF\ub294 \uac10\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ucc28\ub3d9 \ubcf4\ud638\uc758 \uc8fc\uc694 \ub2e8\uc810\uc744 \uc5f4\uac70\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub294 \uc124\uc815\uc744 \uacb0\uc815\ud569\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\uc678\ubd80 \uace0\uc7a5 \uc2dc CT\uc758 \ud3ec\ud654. \uac15\ud55c \uc678\ubd80 \uace0\uc7a5\uc740 \ud558\ub098\uc758 CT \ud68c\ub85c\ub97c \ud3ec\ud654\uc2dc\ucf1c \uc798\ubabb\ub41c \ucc28\ub3d9 \uc804\ub958\ub97c \ud615\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uacbd\uc6b0 \ubc14\uc774\uc5b4\uc2a4, \ub2e4\ub978 \uc791\ub3d9 \uae30\uc6b8\uae30 \ubc0f \ucda9\ubd84\ud55c \ubd80\ub2f4\uc744 \uac00\uc9c4 CT\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li>\ube44\uc728-\uc704\uc0c1 \ubd88\uc77c\uce58. \uac01 \ubcf4\uc0c1 \uc870\uce58\ub294 \uc2dc\uc2a4\ud15c\uc758 \ubbfc\uac10\ub3c4\ub97c \uac10\uc18c\uc2dc\ud0b5\ub2c8\ub2e4.<\/li>\n<li>\ud0ed \uccb4\uc778\uc800\uc758 \uc870\uc815 \ubc94\uc704. \ud0ed \uccb4\uc778\uc800\uc758 \ubc94\uc704\uac00 \ud074\uc218\ub85d \ub354 \ud070 \ucc28\ub3d9 \uc804\ub958\ub97c \ud5c8\uc6a9\ud574\uc57c \ud558\ubbc0\ub85c \ub354 \ub192\uc740 \uc791\ub3d9 \uae30\uc6b8\uae30\ub97c \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<li>\uc804\ub958 \ub3cc\uc785 \ubc0f \uacfc\ub3c4 \uc790\uadf9. \uc774 \ubb38\uc81c\ub294 \uc7a5\uce58\uc758 \ubbfc\uac10\ub3c4\ub97c \uac10\uc18c\uc2dc\ud0a4\ub294 \uace0\uc870\ud30c \uc5b5\uc81c\ub97c \ud1b5\ud574 \ud574\uacb0\ub429\ub2c8\ub2e4.<\/li>\n<li>\ube14\ub77c\uc778\ub4dc \uc874. \uace0\uc7a5\uc740 CT \uad6c\uc5ed \ub108\uba38\uc5d0 \uc704\uce58\ud558\uc5ec \ubcf4\uc774\uc9c0 \uc54a\uac8c \ub429\ub2c8\ub2e4.<\/li>\n<li>CT \ud68c\ub85c\uc758 \ubb34\uacb0\uc131. \ub300\ubd80\ubd84\uc758 \uacbd\uc6b0 \uc774 \ubb38\uc81c\ub294 \ubcc0\uc555\uae30 \uc791\ub3d9 \ub54c\ubb38\uc774 \uc544\ub2c8\ub77c \ud68c\ub85c \uc791\uc5c5\uacfc \uad00\ub828\ub41c \ub2e4\ub978 \uc774\uc720\ub85c \ubc1c\uc0dd\ud55c\ub2e4\uace0 \uc0dd\uac01\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>\uc9c0\ub77d \uac10\uc9c0\uac00 \ub2e4\ub978 \uc6d0\ub9ac\uc5d0 \uae30\ubc18\ud558\uc5ec \uad6c\ucd95\ub418\ub294 \uad00\uc810\uc744 \uc704\ud574, <a href=\"https:\/\/subian-electric.com\/ko\/blog\/what-is-a-core-balance-current-transformer\/\">\ucf54\uc5b4 \ubc38\ub7f0\uc2a4 \uc804\ub958 \ubcc0\uc555\uae30<\/a> \uc720\uc6a9\ud55c \ub300\uc870\uc785\ub2c8\ub2e4: \uc774\ub294 \ucc28\ub3d9 \uc804\ub958\uac00 \uc544\ub2cc \uc794\uc5ec \uc804\ub958\ub97c \uac10\uc9c0\ud558\uba70, \ucc28\ub3d9 \uad6c\uc5ed\uc774 \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294 \ucf00\uc774\ube14 \ub610\ub294 \ubaa8\ud130 \uc9c0\ub77d \uace0\uc7a5\uc5d0 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\uc2dc\uc6b4\uc804 \ubc0f \uc9c0\uc18d\uc801\uc778 \uc810\uac80<\/h2>\n<p>\ucc28\ub3d9 \ub9b4\ub808\uc774\ub97c \uc124\uce58\ud560 \ub54c, \ub098\uc911\uc5d0 \ubb38\uc81c\ub97c \ubc29\uc9c0\ud558\uae30 \uc704\ud574 \uc2dc\uc6b4\uc804 \ud14c\uc2a4\ud2b8\ub97c \uc218\ud589\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \ud14c\uc2a4\ud2b8 \uc911\uc5d0 \uc218\ud589\ud574\uc57c \ud560 \ucd5c\uc18c \uc694\uad6c \uc0ac\ud56d\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\ubc30\uc120 \ub3c4\uba74\uc5d0 \ub530\ub77c \uc591\ucabd\uc5d0\uc11c CT \ube44\uc728\uacfc \uadf9\uc131\uc744 \ud655\uc778\ud558\uc2ed\uc2dc\uc624. \uae30\ubcf8 \uc8fc\uc785 \ud14c\uc2a4\ud2b8 \ubc29\ubc95\uc774 \uc720\ub9ac\ud569\ub2c8\ub2e4.<\/li>\n<li>\ubd80\ud558 \ud558\uc5d0\uc11c CT 2\ucc28 \uc804\ub958\uac00 \uade0\ud615\uc744 \uc774\ub8e8\ub294\uc9c0 \ud14c\uc2a4\ud2b8\ud558\uace0, \uce21\uc815\ub41c \ub204\uc124 \uc804\ub958\ub97c \uc800\uc7a5\ud558\uc2ed\uc2dc\uc624.<\/li>\n<li>\uc678\ubd80 \uace0\uc7a5 \uc804\ub958\uc640 \ub3d9\uc77c\ud55c \uc804\ub958\ub97c \uc8fc\uc785\ud558\uc5ec \uc548\uc815\uc131\uc744 \uc99d\uba85\ud558\uc2ed\uc2dc\uc624. \ub9b4\ub808\uc774\ub294 \uc791\ub3d9\ud558\uc9c0 \uc54a\uc544\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<li>\ubbfc\uac10\ub3c4\ub97c \uc99d\uba85\ud558\uc2ed\uc2dc\uc624: \ub9b4\ub808\uc774\uc758 \ud5c8\uc6a9 \uac12\ubcf4\ub2e4 \uc57d\uac04 \ub192\uc740 \uc804\ub958\ub97c \uc124\uc815\ud558\uace0 \ub9b4\ub808\uc774\uac00 \uc758\ub3c4\ud55c \ub300\ub85c \uc791\ub3d9\ud558\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n<li>\ub450 \ubc88\uc9f8 \uace0\uc870\ud30c \uc8fc\uc785\uc744 \uc0ac\uc6a9\ud558\uc5ec \uace0\uc870\ud30c \ucc28\ub2e8\uc744 \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/li>\n<li>CT \ubd80\ub2f4\uc744 \ud655\uc778\ud558\uace0 CT\uc758 \uc815\uaca9 \ubd80\ub2f4\uacfc \ube44\uad50\ud558\uc2ed\uc2dc\uc624.<\/li>\n<\/ul>\n<p>\ub9b4\ub808\uc774\uc758 \uc2dc\uc6b4\uc804 \ub2e8\uacc4 \ud6c4, \uc815\uae30 \uc810\uac80\uc5d0\ub294 \ub9e4\uc6b0 \uac04\ub2e8\ud55c \ub2e8\uacc4\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4: \ub9e4\ub144 \ub204\uc124 \uc804\ub958\ub97c \uce21\uc815\ud558\uace0 \uc800\uc7a5\ud558\uba70, \uac01 \ud1b5\uacfc \uace0\uc7a5\uc5d0 \ub300\ud55c \ub9b4\ub808\uc774 \uae30\ub85d\uc744 \ubcc0\uacbd\ud558\uace0, \uc608\ube44 CT \ucf54\uc77c\uc5d0 \uc0c8\ub85c\uc6b4 \ubd80\ud558\uac00 \ucd94\uac00\ub418\uc5c8\ub294\uc9c0 \ubaa8\ub2c8\ud130\ub9c1\ud558\uc2ed\uc2dc\uc624. \uc5f0\uac04 \ubcc0\uc555\uae30 \uc815\uae30 \uc810\uac80\uc5d0 \ud3ec\ud568\ub420 \uc218 \uc788\ub294 \ub2e4\ub978 \uc0ac\ud56d\uc5d0 \ub300\ud55c \ub354 \ub113\uc740 \uad00\uc810\uc744 \uc704\ud574, <a href=\"https:\/\/subian-electric.com\/ko\/blog\/transformer-checklist\/\">\ubcc0\uc555\uae30 \uc720\uc9c0\ubcf4\uc218 \uccb4\ud06c\ub9ac\uc2a4\ud2b8<\/a> \uc774\ub294 \uadc0\ud558\uc758 \ud604\uc7a5\uc5d0 \ub9de\uac8c \uc870\uc815\ud560 \uc218 \uc788\ub294 \ud569\ub9ac\uc801\uc778 \ud15c\ud50c\ub9bf\uc785\ub2c8\ub2e4.<\/p>\n<h2>\uc790\uc8fc \ubb3b\ub294 \uc9c8\ubb38<\/h2>\n<h3>\ubcc0\uc555\uae30 \ucc28\ub3d9 \ubcf4\ud638\ub780 \ubb34\uc5c7\uc785\ub2c8\uae4c?<\/h3>\n<p>\uc774\ub294 \ubcc0\uc555\uae30\ub85c \ub4e4\uc5b4\uc624\ub294 \uc804\uae30\ub7c9\uacfc \ub098\uac00\ub294 \uc804\uae30\ub7c9\uc744 \uce21\uc815\ud558\ub294 \ubcf4\ud638 \uacc4\ud68d\uc785\ub2c8\ub2e4. \ub450 \uc5d0\ub108\uc9c0\uac00 \uc77c\uce58\ud558\uba74 \ub2e8\ub77d\uc774 \uc5c6\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4; \ubcf4\ud638\ub97c \uc704\ud574 \uc815\uc758\ub41c \uc784\uacc4\uc810 \uc774\uc0c1\uc73c\ub85c \ucc28\uc774\uac00 \ubc1c\uc0dd\ud558\uba74 \ub0b4\ubd80 \uace0\uc7a5\uc774 \uac10\uc9c0\ub418\uace0 \ub9b4\ub808\uc774\ub294 \ucc28\ub2e8 \ub9b4\ub808\uc774\ub97c \ud1b5\ud574 \ubcc0\uc555\uae30 \ud68c\ub85c \ucc28\ub2e8\uae30\uc5d0 \ud2b8\ub9bd \uc2e0\ud638\ub97c \ubcf4\ub0c5\ub2c8\ub2e4.<\/p>\n<h3>\ubcc0\uc555\uae30 \ucc28\ub3d9 \ubcf4\ud638\ub97c \uc704\ud55c ANSI \ucf54\ub4dc\ub294 \ubb34\uc5c7\uc785\ub2c8\uae4c?<\/h3>\n<p>\ubcc0\uc555\uae30 \ucc28\ub3d9 \ub9b4\ub808\uc774\ub294 87T\ub77c\ub294 \ubc88\ud638\uac00 \ubd80\uc5ec\ub429\ub2c8\ub2e4. 87\uc740 \ubaa8\ub4e0 \ucc28\ub3d9 \ub9b4\ub808\uc774\uc5d0 \ub300\ud55c \uc77c\ubc18 \ucf54\ub4dc\uc778 \ubc18\uba74, 87T\ub294 \ubcc0\uc555\uae30\uc640 \ud568\uaed8 \uc0ac\uc6a9\ud558\ub3c4\ub85d \ud2b9\ubcc4\ud788 \uc124\uacc4\ub418\uc5c8\uc74c\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uac19\uc740 \ud328\ub110\uc5d0\uc11c \ubc1c\uacac\ub420 \uc218 \uc788\ub294 \ub2e4\ub978 \ucf54\ub4dc\ub85c\ub294 \uc81c\ud55c\ub41c \uc811\uc9c0 \uace0\uc7a5\uacfc \uad00\ub828\ub41c 87G \ub610\ub294 64REF, \ubc84\uc2a4\ubc14 \ucc28\ub3d9\uc744 \uc704\ud55c 87B, \uc2dc\uac04 \uacfc\uc804\ub958 \ubc31\uc5c5\uc744 \uc704\ud55c 50\/51, \ubd80\ud750\ud640\uce20 \ub610\ub294 \uae09\uc555 63, \uc5f4\uc744 \uc704\ud55c 49, \uacfc\uc790\uadf9\uc744 \uc704\ud55c 24\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>\ubcc0\uc555\uae30 \ucc28\ub3d9 \ubcf4\ud638\ub97c \uc5b4\ub5bb\uac8c \uacc4\uc0b0\ud569\ub2c8\uae4c?<\/h3>\n<p>\uc774 \uacfc\uc815\uc744 \ub2e4\uc12f \ub2e8\uacc4\ub85c \uc218\ud589\ud558\uc2ed\uc2dc\uc624. \uc608\ub97c \ub4e4\uc5b4, 10 MVA, 33\/11 kV, Dyn11 \ubcc0\uc555\uae30\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\uc815\uaca9 \uc804\ub958\ub97c \uacc4\uc0b0\ud558\uc2ed\uc2dc\uc624. 1\ucc28 \uc804\ub958\ub294 10,000 \u00f7 (\u221a3 \u00d7 33) = 175 A\uc774\uace0, 2\ucc28 \uc804\ub958\ub294 10,000 \u00f7 (\u221a3 \u00d7 11) = 525 A\uc785\ub2c8\ub2e4.<\/li>\n<li>CT \ube44\uc728\uc744 \uc120\ud0dd\ud558\uc2ed\uc2dc\uc624. 33 kV \uce21\uc758 200\/1 \ubc0f 11 kV \uce21\uc758 600\/1 CT \ube44\uc728\uc740 0.875 A \ubc0f 0.875 A 2\ucc28 \uc804\ub958\ub97c \uc81c\uacf5\ud558\uba70, \uc774\ub294 \uc815\uaca9 \ud0ed\uc5d0\uc11c \uc644\ubcbd\ud558\uac8c \uc77c\uce58\ud569\ub2c8\ub2e4. \ubd88\uc77c\uce58\uac00 \uc804\uccb4 \ud0ed \ubc94\uc704\uc5d0\uc11c 10%\ub97c \ucd08\uacfc\ud558\uc9c0 \uc54a\ub3c4\ub85d \ud558\uc2ed\uc2dc\uc624.<\/li>\n<li>\ud53d\uc5c5 \uac12\uc744 \uacb0\uc815\ud558\uc2ed\uc2dc\uc624. \uc774\ub294 0.25 \u00d7 0.875 \u2248 0.22 A\uac00 \ub420 \uac83\uc774\uba70, \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uac00\uc7a5 \uac00\uae4c\uc6b4 \ub2e8\uacc4\ub85c \ubc18\uc62c\ub9bc\ud558\uba74 \uc57d 0.25 A\uac00 \ub429\ub2c8\ub2e4.<\/li>\n<li>\uc81c\uc57d\uc744 \uacc4\uc0b0\ud558\uc2ed\uc2dc\uc624. \uc81c\uc57d \uac12\uc740 \uc815\uaca9 \uc804\ub958\uc758 4\ubc30\uc778 4A\uc758 \ud1b5\uacfc \uc804\ub958\uc5d0 \ub300\ud574 4 \u00d7 0.875 = 3.5 A\uc785\ub2c8\ub2e4. 30%\uc5d0\uc11c\uc758 \uae30\uc6b8\uae30\ub294 \ub9b4\ub808\uc774\uac00 1.05 A\ub97c \ucd08\uacfc\ud558\ub294 \uc804\ub958\uc5d0\uc11c \uc791\ub3d9\ud574\uc57c \ud568\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/li>\n<li>\uc21c\uac04 \uc694\uc18c\ub97c \ud14c\uc2a4\ud2b8\ud558\uc2ed\uc2dc\uc624. 10\uc758 \ud0ed \uc124\uc815\uc5d0\uc11c 2.5A\uc758 \uac12\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>\uc5b4\ub5a4 \ubcc0\uc555\uae30 \ub4f1\uae09\uc5d0 \ub300\ud574 \ucc28\ub3d9 \ubcf4\ud638\uac00 \uad8c\uc7a5\ub429\ub2c8\uae4c?<\/h3>\n<p>\uc720\ud2f8\ub9ac\ud2f0\uc640 \uc7a5\uce58\uc758 \uc911\uc694\uc131\uc5d0 \ub530\ub77c \uc2e4\uc81c\ub85c\ub294 \ubcc0\ub3d9\uc774 \uc788\uc9c0\ub9cc, \uc77c\ubc18\uc801\uc73c\ub85c \ub2e4\uc74c \ud55c\uacc4\uac00 \ub530\ub985\ub2c8\ub2e4. \uc57d 1 MVA \ubbf8\ub9cc\uc758 \uacbd\uc6b0 \ud4e8\uc988\uc640 \uacfc\uc804\ub958 \ub9b4\ub808\uc774\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc57d 1\uc5d0\uc11c 5 MVA\uc758 \uac12\uc5d0\uc11c\ub294 \ucc28\ub3d9 \ubcf4\ud638\uac00 \uc911\uc694 \uc7a5\uce58\uc640 \uacf5\uc7a5\uc744 \uacf5\uae09\ud558\ub294 \ubcc0\uc555\uae30\uc5d0 \uc0ac\uc6a9\ub418\uae30 \uc2dc\uc791\ud569\ub2c8\ub2e4. 5 MVA\ub97c \ucd08\uacfc\ud558\ub294 \uac12, \ud2b9\ud788 \uc57d 10 MVA\ub97c \ucd08\uacfc\ud558\ub294 \uacbd\uc6b0 \ucc28\ub3d9 \ubcf4\ud638\uc758 \uc124\uce58\uac00 \uc758\ubb34\uc801\uc785\ub2c8\ub2e4. \uc774 \uaddc\uce59\uc5d0\ub294 \ub450 \uac00\uc9c0 \uc608\uc678\uac00 \uc788\uc2b5\ub2c8\ub2e4. \ud558\ub098\ub294 \ubcc0\uc555\uae30\uac00 \uad50\uccb4\uac00 \ub9e4\uc6b0 \ubcf5\uc7a1\ud558\uace0\/\ub610\ub294 \ube44\uc6a9\uc774 \ub9ce\uc774 \ub4dc\ub294 \uc885\ub958\uc77c \ub54c\uc785\ub2c8\ub2e4. \ub610 \ub2e4\ub978 \uc774\uc720\ub294 \ubcc0\uc555\uae30 \uc6a9\ub7c9\uc5d0 \ube44\ud574 \uace0\uc7a5 \uc804\ub958 \uc218\uc900\uc774 \ub0ae\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\ucc38\uace0 \ubb38\ud5cc<\/h2>\n<ol>\n<li><a href=\"https:\/\/electrical-engineering-portal.com\/download-center\/books-and-guides\/power-substations\/transformer-differential-protection-scheme\" rel=\"nofollow noopener\" target=\"_blank\">\uc804\uae30 \uacf5\ud559 \ud3ec\ud138 \u2014 \ubcc0\uc555\uae30 \ucc28\ub3d9 \ubcf4\ud638 \u0441\u0445\u0435\u043c<\/a><\/li>\n<li><a href=\"https:\/\/circuitglobe.com\/differential-protection-of-a-transformer.html\" rel=\"nofollow noopener\" target=\"_blank\">\uc11c\ud0b7 \uae00\ub85c\ube0c \u2014 \ubcc0\uc555\uae30\uc758 \ucc28\ub3d9 \ubcf4\ud638<\/a><\/li>\n<li><a href=\"https:\/\/www.electrical4u.com\/differential-protection-of-transformer-differential-relays\/\" rel=\"nofollow noopener\" target=\"_blank\">Electrical4U \u2014 \ubcc0\uc555\uae30 \ubc0f \ucc28\ub3d9 \ub9b4\ub808\uc774\uc758 \ucc28\ub3d9 \ubcf4\ud638<\/a><\/li>\n<li><a href=\"https:\/\/standards.ieee.org\/\" rel=\"nofollow noopener\" target=\"_blank\">IEEE \ud45c\uc900 \ud611\ud68c \u2014 IEEE Std C37.91, \uc804\ub825 \ubcc0\uc555\uae30\uc5d0 \ub300\ud55c \ubcf4\ud638 \ub9b4\ub808\uc774 \uc751\uc6a9 \uac00\uc774\ub4dc<\/a><\/li>\n<li><a href=\"https:\/\/www.selinc.com\/\" rel=\"nofollow noopener\" target=\"_blank\">SEL \u2014 \ubcc0\uc555\uae30 \ucc28\ub3d9 \ubcf4\ud638 \uc751\uc6a9 \ub178\ud2b8<\/a><\/li>\n<\/ol>\n<h2>\uacb0\ub860<\/h2>\n<p>\ucc28\ub3d9 \ubcf4\ud638 \uc790\uccb4\ub294 \uac04\ub2e8\ud569\ub2c8\ub2e4: \uc785\ub825\uacfc \ucd9c\ub825\uc744 \ube44\uad50\ud558\uace0 \uc815\uc0c1\uc801\uc778 \ucc28\uc774\uac00 \ubcf4\ud638\ub97c \ud65c\uc131\ud654\ud558\uc9c0 \uc54a\ub3c4\ub85d \uc784\uacc4\uac12\uc744 \uc870\uc815\ud569\ub2c8\ub2e4. \ubb38\uc81c\ub294 \uc138\ubd80 \uc0ac\ud56d\uc5d0 \uc788\uc2b5\ub2c8\ub2e4: CT\uc758 \uc62c\ubc14\ub978 \ubc30\uce58, \ube44\uc728 \uc77c\uce58, \uc81c\ub85c \uc2dc\ud000\uc2a4 \ud544\ud130, \uace0\uc870\ud30c \ube14\ub85d \uc0ac\uc6a9 \ubc0f \ud0ed \ubcc0\uacbd \ubc94\uc704. \uc774\ub7ec\ud55c \uc138\ubd80 \uc0ac\ud56d\uc774 \uc62c\ubc14\ub974\uba74 \ucc28\ub3d9 \ubcf4\ud638 \ub9b4\ub808\uc774\ub294 \uc624\ub79c \uae30\uac04 \ub3d9\uc548 \uc644\ubcbd\ud558\uac8c \uc791\ub3d9\ud558\uba70, \ud544\uc694\ud560 \ub54c\ub9cc \ud65c\uc131\ud654\ub429\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc138\ubd80 \uc0ac\ud56d\uc774 \uc798\ubabb\ub418\uba74 \ubcc0\uc555\uae30\uac00 \uc804\uc6d0\uc774 \uacf5\uae09\ub418\uc790\ub9c8\uc790 \uc798\ubabb\ub41c \uac83\uc73c\ub85c \ub098\ud0c0\ub0a0 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ub9cc\uc57d \ubcf4\ud638\ud558\ub294 \ub300\uc2e0 \uc870\ub2ec\ud558\ub294 \ubcc0\uc555\uae30\uac00 \ubb38\uc81c\uc758 \ubcc0\uc555\uae30\ub77c\uba74, \uc6b0\ub9ac\ub294 \ubaa8\ub4e0 \uad00\ub828 \ud14c\uc2a4\ud2b8 \ubb38\uc11c\uac00 \ud3ec\ud568\ub41c \uc624\uc77c \uce68\uc9c0 \ubcc0\uc555\uae30\uc640 \uac74\uc2dd \uc7a5\ube44\ub97c \uc81c\uc870\ud558\uace0 \uc788\uc73c\ubbc0\ub85c, \ubcc0\uc555\uae30\uac00 \ubc1c\uc1a1\ub418\uae30 \uc804\uc5d0 CT \uc120\ud0dd \ubc0f \ub9b4\ub808\uc774 \uc124\uc815\uc5d0 \ud544\uc694\ud55c \ubaa8\ub4e0 \uba85\ud310 \uc815\ubcf4\ub97c \uac16\ucd94\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ubcc0\uc555\uae30\uc640 \ud14c\uc2a4\ud2b8 \ubcf4\uace0\uc11c, \ub3c4\uba74 \ubc0f \ud0ed \ubc94\uc704\ub97c \ud3ec\ud568\ud55c \uacac\uc801\uc744 \uc694\uccad\ud560 \uc218 \uc788\uc73c\uba70, \ub300\ubd80\ubd84\uc758 \uacbd\uc6b0 \ubcf4\ud638 \uc5d4\uc9c0\ub2c8\uc5b4\uac00 \ucd94\uac00 \uc774\uba54\uc77c \uc5c6\uc774 \ub9b4\ub808\uc774 \uc124\uc815\uc744 \ucd5c\uc885\ud654\ud558\ub294 \ub370 \ucda9\ubd84\ud569\ub2c8\ub2e4.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>When you ask one of the experienced relay engineers which protective relay will never be taken out of service on a power transformer, the answer will always be differential relay. Although feeders are reclosable and busbars can be separated, a transformer failure which has not been automatically cleared leads to ruptured tank, oil catching fire [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":11656,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-11655","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/posts\/11655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/comments?post=11655"}],"version-history":[{"count":3,"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/posts\/11655\/revisions"}],"predecessor-version":[{"id":11661,"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/posts\/11655\/revisions\/11661"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/media\/11656"}],"wp:attachment":[{"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/media?parent=11655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/categories?post=11655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/subian-electric.com\/ko\/wp-json\/wp\/v2\/tags?post=11655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}