{"id":2176,"date":"2025-08-26T10:11:09","date_gmt":"2025-08-26T02:11:09","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&#038;p=2176"},"modified":"2025-08-26T10:16:08","modified_gmt":"2025-08-26T02:16:08","slug":"how-to-choose-single-phase-surge-protection-device","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/ko\/blog\/how-to-choose-single-phase-surge-protection-device\/","title":{"rendered":"\ub2e8\uc0c1 \uc11c\uc9c0 \ubcf4\ud638 \uc7a5\uce58\ub97c \uc120\ud0dd\ud558\ub294 \ubc29\ubc95\uc740 \ubb34\uc5c7\uc785\ub2c8\uae4c?"},"content":{"rendered":"<h2 data-start=\"474\" data-end=\"492\">\uc18c\uac1c<\/h2>\r\n<p data-start=\"493\" data-end=\"937\">\uc11c\uc9c0\ub294 \uc804\uae30 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uac00\uc7a5 \uacfc\uc18c\ud3c9\uac00\ub418\ub294 \uc704\ud611 \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. \ubc88\uac1c, \uadf8\ub9ac\ub4dc \uc2a4\uc704\uce6d \ub610\ub294 \ub0b4\ubd80 \uc7a5\ube44\ub85c \uc778\ud574 \ubc1c\uc0dd\ud558\ub294 \uac11\uc791\uc2a4\ub7ec\uc6b4 \uacfc\uc804\uc555\uc740 \uc808\uc5f0 \uc131\ub2a5\uc744 \uc800\ud558\uc2dc\ud0a4\uace0 \ucc28\ub2e8\uae30\ub97c \ud2b8\ub9bd\ud558\uac70\ub098 \ubbfc\uac10\ud55c \uc7a5\uce58\ub97c \uc989\uc2dc \ud30c\uad34\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e8\uc0c1 \uc11c\uc9c0 \ubcf4\ud638 \uc7a5\uce58(SPD)\ub294 \uccab \ubc88\uc9f8 \ubc29\uc5b4\uc120\uc785\ub2c8\ub2e4. \uc774\ub294 \uacfc\ub3c4\ud55c \uc5d0\ub108\uc9c0\ub97c \uc811\uc9c0\ub85c \uc804\ud658\ud558\uace0 \uc7a5\ube44\uc5d0 \ub3c4\ub2ec\ud558\ub294 \uc804\uc555\uc774 \uc548\uc804\ud55c \ud55c\ub3c4 \ub0b4\uc5d0\uc11c \uc720\uc9c0\ub418\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/p>\r\n<p data-start=\"939\" data-end=\"1244\">\uc804\uae30 \uc5d4\uc9c0\ub2c8\uc5b4 \ubc0f \uc870\ub2ec \uc804\ubb38\uac00\uc758 \uacbd\uc6b0 \ub2e8\uc0c1 SPD\ub97c \uc0ac\uc6a9\ud560\uc9c0 \uc5ec\ubd80\uac00 \uc544\ub2c8\ub77c \uc62c\ubc14\ub978 SPD\ub97c \uc120\ud0dd\ud558\ub294 \ubc29\ubc95\uc774 \ubb38\uc81c\uc785\ub2c8\ub2e4. \uc774 \uac00\uc774\ub4dc\ub294 \uad6d\uc81c \ud45c\uc900, \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1 \ubaa8\ubc94 \uc0ac\ub840 \ubc0f \uc2e4\uc81c \uacbd\ud5d8\uc744 \uacb0\ud569\ud55c \uba85\ud655\ud558\uace0 \uae30\uc220\uc801\uc774\uba70 \uc2e4\uc6a9\uc801\uc778 \uc811\uadfc \ubc29\uc2dd\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<h2 data-start=\"1251\" data-end=\"1304\">\ub2e8\uc0c1 \uc11c\uc9c0 \ubcf4\ud638 \uc7a5\uce58\ub780 \ubb34\uc5c7\uc785\ub2c8\uae4c?<\/h2>\r\n<p data-start=\"1305\" data-end=\"1604\">\ub2e8\uc0c1 \uc11c\uc9c0 \ubcf4\ud638 \uc7a5\uce58\ub294 \uc77c\uc2dc\uc801\uc778 \uacfc\uc804\uc555\uc73c\ub85c\ubd80\ud130 \ubcf4\ud638\ud558\uae30 \uc704\ud574 230\/240V \ub2e8\uc0c1 AC \uc2dc\uc2a4\ud15c\uc5d0 \uc124\uce58\ub429\ub2c8\ub2e4. \uc815\uc0c1 \uc804\uc555\uc5d0\uc11c\ub294 \uc218\ub3d9 \uc0c1\ud0dc\ub97c \uc720\uc9c0\ud558\uc5ec \uc791\ub3d9\ud558\uc9c0\ub9cc \uc11c\uc9c0\uac00 \ubc1c\uc0dd\ud558\uc790\ub9c8\uc790 \ub0ae\uc740 \uc784\ud53c\ub358\uc2a4 \uacbd\ub85c\uac00 \ub418\uc5b4 \uc11c\uc9c0 \uc804\ub958\ub97c \uc811\uc9c0\ub85c \ub9ac\ub514\ub809\uc158\ud569\ub2c8\ub2e4.<\/p>\r\n<p data-start=\"1606\" data-end=\"1905\">\ub2e8\uc0c1 \ubcf4\ud638 \uc7a5\uce58\ub294 \uc8fc\uac70\uc6a9 \ubc30\uc804\ubc18, \uc0c1\uc5c5\uc6a9 \uac74\ubb3c, \ud0dc\uc591\uad11 \ubc1c\uc804 \uc2dc\uc2a4\ud15c \ubc0f \uc0b0\uc5c5\uc6a9 \uc81c\uc5b4 \ud328\ub110\uc5d0 \ub110\ub9ac \uc801\uc6a9\ub429\ub2c8\ub2e4. \uac01\uac01\uc758 \uacbd\uc6b0 \uc7a5\ube44 \uc218\uba85\uc744 \uc5f0\uc7a5\ud558\uace0 \uac00\ub3d9 \uc911\uc9c0 \uc2dc\uac04\uc744 \uc904\uc774\uba70 \ucd5c\uc2e0 \uc548\uc804 \uc694\uad6c \uc0ac\ud56d\uc744 \uc900\uc218\ud569\ub2c8\ub2e4.<\/p>\r\n<p data-start=\"1606\" data-end=\"1905\"><a href=\"https:\/\/www.britecelectric.com\/ko\/blog\/how-to-choose-single-phase-surge-protection-device\/attachment\/br-20-4p-1type-2-surge-protection-device-jpg-3\/\" rel=\"attachment wp-att-2177\"><img class=\"alignnone wp-image-2177\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/08\/BR-20-4P-1Type-2-Surge-Protection-Device.jpg-2-1024x1024.webp\" alt=\"\" width=\"914\" height=\"914\" \/><\/a><\/p>\r\n\r\n<h2 data-start=\"1912\" data-end=\"1954\">IEC \ud45c\uc900 \ubc0f SPD \ubd84\ub958<\/h2>\r\n<p data-start=\"1955\" data-end=\"2192\">\uc11c\uc9c0 \ubcf4\ud638 \uc7a5\uce58 \ub2e8\uc0c1 \uc120\ud0dd\uc740 \uc8fc\ub85c \uad6d\uc81c \ud45c\uc900\uc744 \uc900\uc218\ud574\uc57c \ud569\ub2c8\ub2e4. <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/5682\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2071\" data-end=\"2087\">IEC 61643-11<\/strong><\/a> \uadf8\ub9ac\uace0 <a href=\"http:\/\/IEC 61643-11\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2092\" data-end=\"2108\">IEC 61643-12<\/strong><\/a>. \uc774\ub294 \ud14c\uc2a4\ud2b8 \ud30c\ud615, \ubd84\ub958 \ubc0f \uc124\uce58 \uc9c0\uce68\uc744 \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<ul data-start=\"2194\" data-end=\"2680\">\r\n \t<li data-start=\"2194\" data-end=\"2394\">\r\n<p data-start=\"2196\" data-end=\"2394\"><strong data-start=\"2196\" data-end=\"2210\">\uc720\ud615 1 SPD<\/strong>: \uc9c1\uc811\uc801\uc778 \ub099\ub8b0 \uc804\ub958\ub97c \uacac\ub51c \uc218 \uc788\ub3c4\ub85d \uc124\uacc4\ub41c 10\/350 \u00b5s \ud30c\ud615\uc73c\ub85c \ud14c\uc2a4\ud2b8\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uac00\uacf5\uc120\uc774\ub098 \ub099\ub8b0 \ubcf4\ud638 \uc2dc\uc2a4\ud15c\uc774 \uc788\ub294 \uc778\uc785\uad6c\uc5d0 \uc124\uce58\ub429\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2395\" data-end=\"2546\">\r\n<p data-start=\"2397\" data-end=\"2546\"><strong data-start=\"2397\" data-end=\"2411\">\uc720\ud615 2 SPD<\/strong>: 8\/20 \u00b5s \ud30c\ud615\uc73c\ub85c \ud14c\uc2a4\ud2b8\ub418\uc5c8\uc73c\uba70 \uc2a4\uc704\uce6d \uc11c\uc9c0 \ubc0f \uac04\uc811 \ubc88\uac1c\ub85c\ubd80\ud130 \ubcf4\ud638\ud569\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ubc30\uc804\ubc18\uc5d0 \uc124\uce58\ub429\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2547\" data-end=\"2680\">\r\n<p data-start=\"2549\" data-end=\"2680\"><strong data-start=\"2549\" data-end=\"2563\">\uc720\ud615 3 SPD<\/strong>: \ubbfc\uac10\ud55c \ubd80\ud558 \uac00\uae4c\uc774\uc5d0 \uc124\uce58\ub418\uc5b4 \uc794\ub958\uc804\uc555(Up)\uc774 \ub9e4\uc6b0 \ub0ae\uc2b5\ub2c8\ub2e4. \ubcf4\ud638\uc758 \ub9c8\uc9c0\ub9c9 \ub2e8\uacc4\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2682\" data-end=\"2841\">SPD\uc758 \uc138\ubd80 \ubd84\ub958\uc640 \uac01 \uc720\ud615\uc774 \ud45c\uc900 \ubc0f \uc2e4\uc81c \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \uc815\uc758\ub418\ub294 \ubc29\uc2dd\uc5d0 \ub300\ud574 \ub354 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\ub824\uba74 \uc5ec\uae30\uc5d0\uc11c \uc804\uc6a9 \uae30\uc0ac\ub97c \ud0d0\uc0c9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. <span style=\"text-decoration: underline; font-size: 20px;\"><a class=\"decorated-link\" href=\"https:\/\/www.britecelectric.com\/ko\/blog\/classification-of-spds\/\" target=\"_blank\" rel=\"noopener\" data-start=\"1210\" data-end=\"1295\"><em><strong>SPD \ubd84\ub958<\/strong><\/em><\/a>.<\/span><\/p>\r\n\r\n<h2 data-start=\"2848\" data-end=\"2880\">\uace0\ub824\ud574\uc57c \ud560 \uc8fc\uc694 \ub9e4\uac1c\ubcc0\uc218<\/h2>\r\n<p data-start=\"2881\" data-end=\"2984\">\ub2e4\uc591\ud55c \ub2e8\uc0c1 SPD\ub97c \ube44\uad50\ud560 \ub54c \uc801\uc808\ud55c \uc120\ud0dd\uc744 \uc704\ud574\uc11c\ub294 \uc5ec\ub7ec \ub9e4\uac1c\ubcc0\uc218\uac00 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<ul data-start=\"2986\" data-end=\"3881\">\r\n \t<li data-start=\"2986\" data-end=\"3181\">\r\n<p data-start=\"2988\" data-end=\"3181\"><strong data-start=\"2988\" data-end=\"3033\">Uc(\ucd5c\ub300 \uc5f0\uc18d \uc791\ub3d9 \uc804\uc555)<\/strong>: \uc7a5\uce58\uac00 \uc131\ub2a5 \uc800\ud558 \uc5c6\uc774 \ucc98\ub9ac\ud560 \uc218 \uc788\ub294 \ucd5c\ub300 RMS \uc804\uc555\uc785\ub2c8\ub2e4. 230\/240V \uc2dc\uc2a4\ud15c\uc758 \uacbd\uc6b0 \ud45c\uc900 \uac12\uc740 \ub77c\uc778\uacfc \uc911\uc131\uc810 \uc0ac\uc774\uc758 275V AC\uc785\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3182\" data-end=\"3307\">\r\n<p data-start=\"3184\" data-end=\"3307\"><strong data-start=\"3184\" data-end=\"3217\">Up(\uc804\uc555 \ubcf4\ud638 \uc218\uc900)<\/strong>: \uc11c\uc9c0 \uc911 \ud074\ub7a8\ud551\ub41c \uc804\uc555\uc785\ub2c8\ub2e4. \ubbfc\uac10\ud55c \uc804\uc790 \uc7a5\uce58\uc5d0\ub294 1.5~2.5kV \ubbf8\ub9cc\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3308\" data-end=\"3473\">\r\n<p data-start=\"3310\" data-end=\"3473\"><strong data-start=\"3310\" data-end=\"3344\">In(\uacf5\uce6d \ubc29\uc804 \uc804\ub958)<\/strong>: SPD\uac00 \uace0\uc7a5 \uc5c6\uc774 \ubc18\ubcf5\uc801\uc73c\ub85c \ubc29\uc804\ud560 \uc218 \uc788\ub294 \uc804\ub958\uc785\ub2c8\ub2e4. \uc6b0\uc218\ud55c \ub2e8\uc0c1 SPD\ub294 \ucd5c\uc18c 20kA(8\/20\u03bcs)\ub97c \ucc98\ub9ac\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3474\" data-end=\"3601\">\r\n<p data-start=\"3476\" data-end=\"3601\"><strong data-start=\"3476\" data-end=\"3512\">Imax(\ucd5c\ub300 \ubc29\uc804 \uc804\ub958)<\/strong>: SPD\uac00 \ub2e8\uc77c \uc774\ubca4\ud2b8\uc5d0\uc11c \uacac\ub51c \uc218 \uc788\ub294 \ucd5c\ub300 \uc804\ub958(\uc77c\ubc18\uc801\uc73c\ub85c 40kA \uc774\uc0c1)\uc785\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3602\" data-end=\"3759\">\r\n<p data-start=\"3604\" data-end=\"3759\"><strong data-start=\"3604\" data-end=\"3630\">Iimp(\uc784\ud384\uc2a4 \uc804\ub958)<\/strong>: \uc720\ud615 1 SPD\uc5d0\ub9cc \ud574\ub2f9\ub418\uba70 10\/350\u03bcs \ud30c\ud615\uc73c\ub85c \ud14c\uc2a4\ud2b8\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uac12\uc740 12.5kA\ubd80\ud130 \uc2dc\uc791\ud558\uba70 \uace0\uc704\ud5d8 \uc9c0\uc5ed\uc5d0\uc11c\ub294 25kA\uac00 \uad8c\uc7a5\ub429\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3760\" data-end=\"3881\">\r\n<p data-start=\"3762\" data-end=\"3881\"><strong data-start=\"3762\" data-end=\"3779\">\uc751\ub2f5 \uc2dc\uac04<\/strong>: SPD\ub294 \ub098\ub178\ucd08 \ub2e8\uc704\ub85c \uc791\ub3d9\ud569\ub2c8\ub2e4. \ubc18\uc751\uc774 \ube60\ub97c\uc218\ub85d \ubbfc\uac10\ud55c \uc804\uc790 \uc7a5\uce58\ub97c \ub354 \ud6a8\uacfc\uc801\uc73c\ub85c \ubcf4\ud638\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"3883\" data-end=\"4010\">\uc774\ub7ec\ud55c \ub9e4\uac1c\ubcc0\uc218\ub294 \ud56d\uc0c1 \uc2dc\uc2a4\ud15c\uc758 \ub178\ucd9c \uc218\uc900, \uc811\uc9c0 \uc720\ud615 \ubc0f \uc7a5\ube44 \uc808\uc5f0 \ubc94\uc8fc\uc640 \uc77c\uce58\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<h2 data-start=\"4017\" data-end=\"4064\">\uc2dc\uc2a4\ud15c \uc811\uc9c0 \ubc0f \ubc30\uc120 \uad6c\uc131<\/h2>\r\n<p data-start=\"4065\" data-end=\"4202\">\uc811\uc9c0 \uc720\ud615\uc740 \uac04\uacfc\ub418\ub294 \uacbd\uc6b0\uac00 \ub9ce\uc9c0\ub9cc \ub2e8\uc0c1 \uc11c\uc9c0 \ubcf4\ud638 \uc7a5\uce58\ub97c \uc120\ud0dd\ud560 \ub54c \uac00\uc7a5 \uacb0\uc815\uc801\uc778 \uc694\uc18c \uc911 \ud558\ub098\uc785\ub2c8\ub2e4.<\/p>\r\n\r\n<ul data-start=\"4204\" data-end=\"4774\">\r\n \t<li data-start=\"4204\" data-end=\"4497\">\r\n<p data-start=\"4206\" data-end=\"4497\"><strong data-start=\"4206\" data-end=\"4220\">\ud2f0\ud2f0\uc2dc\uc2a4\ud15c\uc988<\/strong>: 1P+N(1+1\uc774\ub77c\uace0\ub3c4 \ud568) SPD\uac00 \ud544\uc694\ud569\ub2c8\ub2e4. \uc774 \uad6c\uc131\uc740 \ub77c\uc778\uacfc \uc911\uc131\uc120 \uc0ac\uc774\uc758 MOV \ubcf4\ud638\uc640 \uc911\uc131\uc120\uacfc PE \uc0ac\uc774\uc758 \uc2a4\ud30c\ud06c \uac2d \ub610\ub294 \uc804\uc6a9 \uc694\uc18c\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uc774\ub294 \uc811\uc9c0\ub85c\uc758 \uc81c\uc5b4\ub41c \ubc29\uc804\uc744 \ubcf4\uc7a5\ud558\uba70, \uc774\ub294 \uc624\ub958 \uc911\uc5d0 \uc911\uc131 \uc804\uc704\uac00 \uc0c1\uc2b9\ud560 \uc218 \uc788\ub294 TT\uc5d0\uc11c \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"4498\" data-end=\"4670\">\r\n<p data-start=\"4500\" data-end=\"4670\"><strong data-start=\"4500\" data-end=\"4526\">TN-S \ub610\ub294 TN-C-S \uc2dc\uc2a4\ud15c<\/strong>: \ubd84\uc804\ubc18\uc758 \uc124\uacc4\uc5d0 \ub530\ub77c 1P \ub610\ub294 1P+N\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub77c\uc778-\uc911\uc131\uc120 \ubc0f \ub77c\uc778-\uc811\uc9c0 \uacbd\ub85c \ubaa8\ub450 \ubcf4\ud638\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"4671\" data-end=\"4774\">\r\n<p data-start=\"4673\" data-end=\"4774\"><strong data-start=\"4673\" data-end=\"4689\">TN-C \uc2dc\uc2a4\ud15c<\/strong>: \uc77c\ubc18\uc801\uc73c\ub85c PEN \ub3c4\uccb4\uc5d0 \uc811\uadfc\ud560 \uc218 \uc788\ub294\uc9c0 \uc5ec\ubd80\uc5d0 \ub530\ub77c 1P \ub610\ub294 2P SPD\ub97c \uc801\uc6a9\ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"4776\" data-end=\"5017\">\ubaa8\ub4e0 \uc2dc\uc2a4\ud15c\uc5d0 \ub300\ud574 \ubc30\uc120 \uaddc\uce59\uc740 \ub3d9\uc77c\ud558\uac8c \uc720\uc9c0\ub429\ub2c8\ub2e4. \uc989, SPD\uc758 \uc811\uc9c0 \uc5f0\uacb0\uc744 \uac00\ub2a5\ud55c \ud55c \uc9e7\uac8c(\uc774\uc0c1\uc801\uc73c\ub85c\ub294 0.5m \ubbf8\ub9cc) \uc720\uc9c0\ud558\uc2ed\uc2dc\uc624. \ub9ac\ub4dc\uac00 \uae38\uba74 \uc778\ub355\ud134\uc2a4\uac00 \uc99d\uac00\ud558\ubbc0\ub85c \ubcf4\ud638 \uc7a5\uce58\uc5d0 \ud45c\uc2dc\ub418\ub294 \uc794\ub958 \uc804\uc555\uc774 \uc99d\uac00\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<h2 data-start=\"5024\" data-end=\"5058\">\ub2e8\uacc4\ubcc4 \uc120\ud0dd \uac00\uc774\ub4dc<\/h2>\r\n<p data-start=\"5060\" data-end=\"5255\">\uc774\uac83\uc774 \uc758\uc0ac\uacb0\uc815 \uacfc\uc815\uc758 \ud575\uc2ec\uc774\ub2e4. \ub9ce\uc740 \uc5d4\uc9c0\ub2c8\uc5b4\uc640 \uad6c\ub9e4\uc790\uac00 \ub2e8\uc0c1 SPD\ub97c \uc120\ud0dd\ud558\ub294 \ubc29\ubc95\uc744 \uad6c\uccb4\uc801\uc73c\ub85c \uac80\uc0c9\ud558\ubbc0\ub85c \uc774 \uc139\uc158\uc5d0\uc11c\ub294 \uc0c1\uc138\ud558\uace0 \uc2e4\uc6a9\uc801\uc778 \ub85c\ub4dc\ub9f5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<h3 data-start=\"5257\" data-end=\"5559\"><strong data-start=\"5257\" data-end=\"5295\">1\ub2e8\uacc4: \uc704\ud5d8 \ubc0f \ub178\ucd9c \ud3c9\uac00<\/strong><\/h3>\r\n<p data-start=\"5257\" data-end=\"5559\">\uac74\ubb3c\uc5d0 \uc678\ubd80 \ub099\ub8b0 \ubcf4\ud638 \uc2dc\uc2a4\ud15c(LPS)\uc774 \uc788\ub294\uc9c0 \ub610\ub294 \uac00\uacf5\uc120\uc73c\ub85c \uc804\uc6d0\uc774 \uacf5\uae09\ub418\ub294\uc9c0 \ud655\uc778\ud558\uc2ed\uc2dc\uc624. \uadf8\ub807\ub2e4\uba74 \uc11c\ube44\uc2a4 \uc785\uad6c\uc5d0 \uc720\ud615 1 SPD\uac00 \ud544\uc218\uc785\ub2c8\ub2e4. \uc704\ud5d8\ub3c4\uac00 \ub0ae\uc740 \uc9c0\uc5ed\uc758 \uc9c0\ud558 \uacf5\uae09\uc758 \uacbd\uc6b0 \uace0\uc6a9\ub7c9 Type 2\ub85c \ucda9\ubd84\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\r\n\r\n<h3 data-start=\"5561\" data-end=\"5803\"><strong data-start=\"5561\" data-end=\"5601\">2\ub2e8\uacc4: \uc811\uc9c0 \uc2dc\uc2a4\ud15c \uc2dd\ubcc4<\/strong><\/h3>\r\n<p data-start=\"5561\" data-end=\"5803\">\uc124\uce58\uac00 TT, TN-S, TN-C-S \ub610\ub294 TN-C\uc778\uc9c0 \ud655\uc778\ud558\uc138\uc694. \uc774\ub97c \ud1b5\ud574 1P SPD, 1P+N SPD \ub610\ub294 2P SPD\uac00 \ud544\uc694\ud55c\uc9c0 \uacb0\uc815\ub429\ub2c8\ub2e4. \uc798\ubabb\ub41c \ubc30\uc120 \uad6c\uc131\uc744 \uc120\ud0dd\ud558\uba74 SPD\uac00 \ud6a8\uacfc\uc801\uc774\uc9c0 \uc54a\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\r\n\r\n<h3 data-start=\"5805\" data-end=\"5846\"><strong data-start=\"5805\" data-end=\"5844\">3\ub2e8\uacc4: \ubcf4\ud638 \ub2e8\uacc4 \uc815\uc758<\/strong><\/h3>\r\n<ul data-start=\"5847\" data-end=\"6077\">\r\n \t<li data-start=\"5847\" data-end=\"5908\">\r\n<p data-start=\"5849\" data-end=\"5908\">\uc11c\ube44\uc2a4 \uc785\uad6c: Type 1 \ub610\ub294 Type 1+2 \uacb0\ud569 SPD.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5909\" data-end=\"5978\">\r\n<p data-start=\"5911\" data-end=\"5978\">\ubc30\uc804\ubc18: \uc720\ud615 2, In \u2265 20kA \ubc0f Imax \u2265 40kA.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5979\" data-end=\"6077\">\r\n<p data-start=\"5981\" data-end=\"6077\">\ubbfc\uac10\ud55c \ubd80\ud558\uc5d0\uc11c: \uc720\ud615 3, \uc804\uc790 \uc7a5\uce58\uc758 \uc808\uc5f0 \ub0b4\ub825 \uc774\ud558\ub85c Up\uc744 \uc904\uc785\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"6079\" data-end=\"6159\"><strong data-start=\"6079\" data-end=\"6115\">4\ub2e8\uacc4: \uae30\uc220 \ub4f1\uae09 \uc120\ud0dd<\/strong><\/h3>\r\n<p data-start=\"6079\" data-end=\"6159\">SPD \ub4f1\uae09\uc744 \uadc0\ud558\uc758 \uc2dc\uc2a4\ud15c\uacfc \uc77c\uce58\uc2dc\ud0a4\uc2ed\uc2dc\uc624:<\/p>\r\n\r\n<ul data-start=\"6160\" data-end=\"6369\">\r\n \t<li data-start=\"6160\" data-end=\"6197\">\r\n<p data-start=\"6162\" data-end=\"6197\">Uc: 230\/240V \uc2dc\uc2a4\ud15c\uc6a9 275V AC.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6198\" data-end=\"6304\">\r\n<p data-start=\"6200\" data-end=\"6304\">\uc704: \uc7a5\ube44 \uc808\uc5f0 \ubc94\uc8fc(IEC 60664: Cat II \u2252 2.5 kV, Cat III \u2252 4 kV)\ubcf4\ub2e4 \ub0ae\uc544\uc57c \ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6305\" data-end=\"6369\">\r\n<p data-start=\"6307\" data-end=\"6369\">In\/Imax\/Iimp: \uc124\uce58 \uc218\uc900 \ubc0f \uc704\ud5d8 \uad6c\uc5ed\uc5d0 \ub530\ub77c.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"6371\" data-end=\"6689\"><strong data-start=\"6371\" data-end=\"6415\">5\ub2e8\uacc4: \ub2e8\uacc4 \uac04 \uc870\uc815 \uacc4\ud68d<\/strong><\/h3>\r\n<p data-start=\"6371\" data-end=\"6689\">SPD\ub294 \ud568\uaed8 \uc791\ub3d9\ud574\uc57c \ud569\ub2c8\ub2e4. \uc5c5\uc2a4\ud2b8\ub9bc \uc7a5\uce58\ub294 \ud30c\uad34\uc801\uc778 \uc804\uc555\uc744 \ub2e4\uc6b4\uc2a4\ud2b8\ub9bc\uc73c\ub85c \uc804\ub2ec\ud558\uc9c0 \uc54a\uace0 \uc5d0\ub108\uc9c0\ub97c \ud761\uc218\ud574\uc57c \ud558\uba70 \ub2e4\uc6b4\uc2a4\ud2b8\ub9bc SPD\ub294 \ubcf4\ud638 \uae30\ub2a5\uc744 \ubbf8\uc138 \uc870\uc815\ud569\ub2c8\ub2e4. \uc7a5\uce58 \uc0ac\uc774\uc5d0 \ucd5c\uc18c 10\ubbf8\ud130\ub97c \uc720\uc9c0\ud558\uac70\ub098 \ub514\ucee4\ud50c\ub9c1 \uc778\ub355\ud134\uc2a4\ub97c \uc0bd\uc785\ud558\uc5ec \uc801\uc808\ud55c \uc5d0\ub108\uc9c0 \uacf5\uc720\ub97c \ubcf4\uc7a5\ud558\uc2ed\uc2dc\uc624.<\/p>\r\n\r\n<h3 data-start=\"6691\" data-end=\"6928\"><strong data-start=\"6691\" data-end=\"6739\">6\ub2e8\uacc4: \uc801\uc808\ud55c \uacfc\uc804\ub958 \ubcf4\ud638 \ubcf4\uc7a5<\/strong><\/h3>\r\n<p data-start=\"6691\" data-end=\"6928\">\ubaa8\ub4e0 SPD\uc5d0\ub294 \ubc31\uc5c5 \ubcf4\ud638\uac00 \ud544\uc694\ud569\ub2c8\ub2e4. SPD\uc5d0 \ud1b5\ud569 \ud4e8\uc988\uac00 \ud3ec\ud568\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc740 \uacbd\uc6b0 MCB \ub610\ub294 \ud4e8\uc988\ub97c \uc9c1\ub82c\ub85c \uc124\uce58\ud558\uc2ed\uc2dc\uc624. \uc774\ub294 SPD\uc758 \uc218\uba85\uc774 \ub2e4\ud588\uc744 \ub54c \ub2e8\ub77d \uc0ac\uace0\ub97c \ubc29\uc9c0\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<h3 data-start=\"6930\" data-end=\"7027\"><strong data-start=\"6930\" data-end=\"6979\">7\ub2e8\uacc4: \uc11c\ube44\uc2a4 \uc218\uba85 \ubc0f \uc720\uc9c0 \uad00\ub9ac \uace0\ub824<\/strong><\/h3>\r\n<p data-start=\"6930\" data-end=\"7027\">SPD\ub294 \uc2dc\uac04\uc774 \uc9c0\ub0a8\uc5d0 \ub530\ub77c \uc131\ub2a5\uc774 \uc800\ud558\ub429\ub2c8\ub2e4. \ub2e4\uc74c\uc744 \uac16\ucd98 \ubaa8\ub378\uc744 \uc120\ud0dd\ud558\uc138\uc694.<\/p>\r\n\r\n<ul data-start=\"7028\" data-end=\"7241\">\r\n \t<li data-start=\"7028\" data-end=\"7093\">\r\n<p data-start=\"7030\" data-end=\"7093\">\ub179\uc0c9\/\ube68\uac04\uc0c9 \uc0c1\ud0dc\ub97c \ud45c\uc2dc\ud558\ub294 \uc0c1\ud0dc \ud45c\uc2dc \ucc3d\uc785\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7094\" data-end=\"7162\">\r\n<p data-start=\"7096\" data-end=\"7162\">\uc81c\uc5b4 \uc2dc\uc2a4\ud15c \ubaa8\ub2c8\ud130\ub9c1\uc744 \uc704\ud55c \uc6d0\uaca9 \uc2e0\ud638 \uc811\uc810.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7163\" data-end=\"7241\">\r\n<p data-start=\"7165\" data-end=\"7241\">\uad50\uccb4 \uac00\ub2a5\ud55c \ud50c\ub7ec\uadf8\uc778 \ubaa8\ub4c8\uc774\ubbc0\ub85c \uc720\uc9c0 \uad00\ub9ac \uc2dc \uc7ac\ubc30\uc120\uc774 \ud544\uc694\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"7243\" data-end=\"7418\">\uc774 \ub2e8\uacc4\ubcc4 \ud504\ub85c\uc138\uc2a4\ub97c \ub530\ub974\uba74 \ub2e8\uc0c1 SPD\uac00 \uc62c\ubc14\ub974\uac8c \ud3c9\uac00\ub420 \ubfd0\ub9cc \uc544\ub2c8\ub77c \uc7a5\uae30\uc801 \uc2e0\ub8b0\uc131\uc744 \uc704\ud574 \uc62c\ubc14\ub974\uac8c \uc124\uce58 \ubc0f \uc720\uc9c0 \uad00\ub9ac\ub429\ub2c8\ub2e4.<\/p>\r\n\r\n<h2 data-start=\"7425\" data-end=\"7476\">\uc2e4\uc6a9\uc801\uc778 \uc124\uce58 \ud301 \ubc0f \uc77c\ubc18\uc801\uc778 \uc624\ub958<\/h2>\r\n<p data-start=\"7478\" data-end=\"7602\">\uc544\ubb34\ub9ac \ucd5c\uace0\uc758 \ub2e8\uc0c1 \ubcf4\ud638 \uc7a5\uce58\ub77c\ub3c4 \uc798\ubabb \uc124\uce58\ud558\uba74 \uc2e4\ud328\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\uc74c \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1 \uc6d0\uce59\uc744 \ub530\ub974\uc2ed\uc2dc\uc624.<\/p>\r\n\r\n<ul data-start=\"7604\" data-end=\"7913\">\r\n \t<li data-start=\"7604\" data-end=\"7653\">\r\n<p data-start=\"7606\" data-end=\"7653\">\ub9ac\ub4dc\ub97c 0.5m \ubbf8\ub9cc\uc73c\ub85c \uc9e7\uace0 \uc9c1\uc811\uc801\uc73c\ub85c \uc720\uc9c0\ud558\uc2ed\uc2dc\uc624.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7654\" data-end=\"7716\">\r\n<p data-start=\"7656\" data-end=\"7716\">\ucee4\ud50c\ub9c1 \uc11c\uc9c0\ub97c \ubc29\uc9c0\ud558\ub824\uba74 \uc804\uc6d0 \ubc0f \uc2e0\ud638 \ucf00\uc774\ube14\uc744 \ubd84\ub9ac\ud558\uc2ed\uc2dc\uc624.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7717\" data-end=\"7769\">\r\n<p data-start=\"7719\" data-end=\"7769\">\ubcf4\ud638\ub41c \ud68c\ub85c\uc640 \ud568\uaed8 SPD \ub9ac\ub4dc\ub97c \ubb36\uc9c0 \ub9c8\uc2ed\uc2dc\uc624.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7770\" data-end=\"7844\">\r\n<p data-start=\"7772\" data-end=\"7844\">\ud56d\uc0c1 SPD \uc811\uc9c0\ub97c \uac00\uc7a5 \uac00\uae4c\uc6b4 \ub4f1\uc804\uc704 \ubcf8\ub529 \ubc14\uc5d0 \uc5f0\uacb0\ud558\uc2ed\uc2dc\uc624.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7845\" data-end=\"7913\">\r\n<p data-start=\"7847\" data-end=\"7913\">\uc11c\ub85c \ub2e4\ub978 SPD \ub2e8\uacc4 \uc0ac\uc774\uc758 \uc870\uc815 \uac70\ub9ac\ub97c \uc874\uc911\ud558\uc2ed\uc2dc\uc624.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"7915\" data-end=\"8130\">\uc77c\ubc18\uc801\uc778 \uc2e4\uc218\uc5d0\ub294 \ub2e8 \ud558\ub098\uc758 \uc2a4\ud14c\uc774\uc9c0\ub9cc \uc124\uce58\ud558\uac70\ub098, \u200b\u200bTT \uc2dc\uc2a4\ud15c\uc5d0\uc11c N-PE \ubcf4\ud638\ub97c \uc78a\uc5b4\ubc84\ub9ac\uac70\ub098, \uc2e4\uc81c \ud544\uc694 \uc5c6\uc774 SPD\ub97c \uacfc\ub3c4\ud558\uac8c \uc124\uce58\ud558\ub294 \uac83\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4. \uc774\ub4e4 \uac01\uac01\uc740 \ubcf4\ud638 \ud6a8\uc728\uc131\uc744 \uac10\uc18c\uc2dc\ud0a4\uace0 \uc774\uc810 \uc5c6\uc774 \ube44\uc6a9\uc744 \uc99d\uac00\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\r\n\r\n<h2 data-start=\"8137\" data-end=\"8163\">\uc608\uc2dc \uc560\ud50c\ub9ac\ucf00\uc774\uc158<\/h2>\r\n<ul data-start=\"8165\" data-end=\"8850\">\r\n \t<li data-start=\"8165\" data-end=\"8343\">\r\n<p data-start=\"8167\" data-end=\"8343\"><strong data-start=\"8167\" data-end=\"8195\">\uc8fc\uac70\uc6a9 \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8<\/strong>: \uc8fc \ubc30\uc804\ubc18\uc5d0 \uc124\uce58\ub41c Type 2 SPD(In 20 kA, Imax 40 kA, Up &lt; 1.5 kV)\ub294 \uacc4\ud1b5 \ubc29\ud574\ub85c\ubd80\ud130 \uac00\uc804\uc81c\ud488\uc744 \ubcf4\ud638\ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"8344\" data-end=\"8498\">\r\n<p data-start=\"8346\" data-end=\"8498\"><strong data-start=\"8346\" data-end=\"8370\">\uc0c1\uc5c5\uc6a9 \uac74\ubb3c<\/strong>: \uc8fc \ubc30\uc804\ubc18\uc758 Type 1+2 SPD\uc640 \ubc14\ub2e5 \ubc30\uc804\ubc18\uc758 Type 2 SPD\uac00 \uacb0\ud569\ub418\uc5b4 \uc11c\ube44\uc2a4\uc758 \uc5f0\uc18d\uc131\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"8499\" data-end=\"8673\">\r\n<p data-start=\"8501\" data-end=\"8673\"><strong data-start=\"8501\" data-end=\"8526\">\uc0b0\uc5c5\uc2dc\uc124<\/strong>: \uc11c\ube44\uc2a4 \uc785\uad6c\uc5d0 25kA Iimp \ub4f1\uae09\uc758 \uc720\ud615 1 SPD, \ubaa8\ud130 \uc81c\uc5b4 \uc13c\ud130\uc5d0 \uc870\uc815\ub41c \uc720\ud615 2 SPD \ubc0f PLC\ub97c \ubcf4\ud638\ud558\ub294 \uc720\ud615 3 SPD\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"8674\" data-end=\"8850\">\r\n<p data-start=\"8676\" data-end=\"8850\"><strong data-start=\"8676\" data-end=\"8696\">\ud0dc\uc591\uad11 PV \uc2dc\uc2a4\ud15c<\/strong>: DC \uce21\uc5d0\ub294 PV \uc815\uaca9 SPD\ub97c \uc0ac\uc6a9\ud558\uc2ed\uc2dc\uc624. AC \uce21\uc5d0\uc11c\ub294 \uc778\ubc84\ud130 \ucd9c\ub825\uc758 Type 2 \ub2e8\uc0c1 SPD\uac00 \uc778\ubc84\ud130\uc640 \uadf8\ub9ac\ub4dc \uc778\ud130\ud398\uc774\uc2a4\ub97c \ubaa8\ub450 \ubcf4\ud638\ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"8857\" data-end=\"8873\">\uacb0\ub860<\/h2>\r\n<p data-start=\"8875\" data-end=\"9090\">\uc62c\ubc14\ub978 \ub2e8\uc0c1 \uc11c\uc9c0 \ubcf4\ud638 \uc7a5\uce58\ub97c \uc120\ud0dd\ud558\ub824\uba74 \ub370\uc774\ud130\uc2dc\ud2b8\ub97c \uc2a4\uce94\ud558\ub294 \uac83 \uc774\uc0c1\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uc774\ub294 \uc2dc\uc2a4\ud15c\uc744 \uc774\ud574\ud558\uace0, \uc704\ud5d8\uc744 \ud3c9\uac00\ud558\uace0, IEC \ud45c\uc900\uc744 \uc801\uc6a9\ud558\uace0, \ub9e4\uac1c\ubcc0\uc218\ub97c \uc2e0\uc911\ud558\uac8c \uc77c\uce58\uc2dc\ud0a4\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n<ul data-start=\"9092\" data-end=\"9348\">\r\n \t<li data-start=\"9092\" data-end=\"9151\">\r\n<p data-start=\"9094\" data-end=\"9151\">\uc785\uad6c\uc5d0\uc11c\ub294 1\uc885\uc73c\ub85c \ub099\ub8b0\ub85c\ubd80\ud130 \ubcf4\ud638\ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"9152\" data-end=\"9203\">\r\n<p data-start=\"9154\" data-end=\"9203\">\ubc30\ud3ec \uc2dc\uc5d0\ub294 \uacac\uace0\ud55c Type 2 \uc7a5\uce58\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/p>\r\n<\/li>\r\n \t<li data-start=\"9204\" data-end=\"9266\">\r\n<p data-start=\"9206\" data-end=\"9266\">\ubbfc\uac10\ud55c \uc804\uc790\uc81c\ud488\uc758 \uacbd\uc6b0 \uc0ac\uc6a9 \uc2dc\uc810\uc5d0 \uc720\ud615 3\uc744 \ucd94\uac00\ud558\uc138\uc694.<\/p>\r\n<\/li>\r\n \t<li data-start=\"9267\" data-end=\"9348\">\r\n<p data-start=\"9269\" data-end=\"9348\">\ud56d\uc0c1 \uc811\uc9c0 \uc2dc\uc2a4\ud15c, \ubc30\uc120 \uad00\ud589 \ubc0f \uc720\uc9c0 \uad00\ub9ac \uc694\uad6c \uc0ac\ud56d\uc744 \uc874\uc911\ud558\uc2ed\uc2dc\uc624.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"9350\" data-end=\"9539\">\uc774\ub7ec\ud55c \uc6d0\uce59\uc744 \uc801\uc6a9\ud568\uc73c\ub85c\uc368 \uc804\uae30 \uc5d4\uc9c0\ub2c8\uc5b4\uc640 \uc870\ub2ec \uc804\ubb38\uac00\ub294 \uc2dc\uc2a4\ud15c\uc774 \uaddc\uc815\uc744 \uc900\uc218\ud560 \ubfd0\ub9cc \uc544\ub2c8\ub77c \ubcf5\uc6d0\ub825\uc774 \ub6f0\uc5b4\ub098\uace0 \ube44\uc6a9 \ud6a8\uc728\uc801\uc774\uba70 \ubbf8\ub798 \uc9c0\ud5a5\uc801\uc784\uc744 \ubcf4\uc7a5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>","protected":false},"featured_media":2175,"parent":0,"menu_order":120,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-2176","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"This blog provides a comprehensive guide on how to choose Single-Phase Surge Protection Devices for residential, commercial, and industrial applications. It explains SPD classifications under IEC standards, technical parameters like Uc, Up, In, Imax, and Iimp, wiring configurations for TT and TN systems, and a detailed step-by-step selection process. With practical installation tips and real-world application cases, the article offers engineers and procurement specialists actionable insights to ensure reliable surge protection.","txt":"<h2 data-start=\"474\" data-end=\"492\">Introduction<\/h2>\r\n<p data-start=\"493\" data-end=\"937\">Surges are one of the most underestimated threats in electrical systems. A sudden overvoltage, whether caused by lightning, grid switching, or even internal equipment, can degrade insulation, trip breakers, or destroy sensitive devices in an instant. A Single-Phase Surge Protection Device (SPD) is the first line of defense. It diverts excess energy to earth and ensures that the voltage reaching your equipment stays within safe limits.<\/p>\r\n<p data-start=\"939\" data-end=\"1244\">For electrical engineers and procurement specialists, the challenge is not whether to use a single phase SPD, but how to choose the right one. This guide provides a clear, technical, and practical approach that combines international standards, engineering best practices, and real-world experience.<\/p>\r\n\r\n<h2 data-start=\"1251\" data-end=\"1304\">What is a Single-Phase Surge Protection Device?<\/h2>\r\n<p data-start=\"1305\" data-end=\"1604\">A Single-Phase Surge Protection Device is installed in 230\/240V single-phase AC systems to guard against transient overvoltages. It operates by remaining passive under normal voltage, but as soon as a surge occurs, it becomes a low-impedance path and redirects the surge current to the ground.<\/p>\r\n<p data-start=\"1606\" data-end=\"1905\">Single phase protection devices are widely applied in residential distribution boards, commercial buildings, solar photovoltaic systems, and industrial control panels. In each case, they extend the lifetime of equipment, reduce downtime, and provide compliance with modern safety requirements.<\/p>\r\n<p data-start=\"1606\" data-end=\"1905\"><a href=\"https:\/\/www.britecelectric.com\/blog\/how-to-choose-single-phase-surge-protection-device\/attachment\/br-20-4p-1type-2-surge-protection-device-jpg-3\/\" rel=\"attachment wp-att-2177\"><img class=\"alignnone wp-image-2177\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/08\/BR-20-4P-1Type-2-Surge-Protection-Device.jpg-2-1024x1024.webp\" alt=\"\" width=\"914\" height=\"914\" \/><\/a><\/p>\r\n\r\n<h2 data-start=\"1912\" data-end=\"1954\">IEC Standards and SPD Classification<\/h2>\r\n<p data-start=\"1955\" data-end=\"2192\">The selection of a surge protection device single phase must be aligned with international standards, primarily <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/5682\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2071\" data-end=\"2087\">IEC 61643-11<\/strong><\/a> and <a href=\"http:\/\/IEC 61643-11\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2092\" data-end=\"2108\">IEC 61643-12<\/strong><\/a>. These define the testing waveforms, classification, and installation guidelines:<\/p>\r\n\r\n<ul data-start=\"2194\" data-end=\"2680\">\r\n \t<li data-start=\"2194\" data-end=\"2394\">\r\n<p data-start=\"2196\" data-end=\"2394\"><strong data-start=\"2196\" data-end=\"2210\">Type 1 SPD<\/strong>: Tested with 10\/350 \u00b5s waveform, designed to withstand direct lightning currents. Installed at the service entrance where overhead lines or lightning protection systems are present.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2395\" data-end=\"2546\">\r\n<p data-start=\"2397\" data-end=\"2546\"><strong data-start=\"2397\" data-end=\"2411\">Type 2 SPD<\/strong>: Tested with 8\/20 \u00b5s waveform, protects against switching surges and indirect lightning. Typically installed in distribution panels.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2547\" data-end=\"2680\">\r\n<p data-start=\"2549\" data-end=\"2680\"><strong data-start=\"2549\" data-end=\"2563\">Type 3 SPD<\/strong>: Installed close to sensitive loads, ensures very low residual voltage (Up). Used as the last stage of protection.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2682\" data-end=\"2841\">If you want a deeper dive into the detailed classification of SPDs and how each type is defined in standards and practical applications, you can explore our dedicated article here: <span style=\"text-decoration: underline; font-size: 20px;\"><a class=\"decorated-link\" href=\"https:\/\/www.britecelectric.com\/blog\/classification-of-spds\/\" target=\"_blank\" rel=\"noopener\" data-start=\"1210\" data-end=\"1295\"><em><strong>Classification of SPDs<\/strong><\/em><\/a>.<\/span><\/p>\r\n\r\n<h2 data-start=\"2848\" data-end=\"2880\">Key Parameters to Consider<\/h2>\r\n<p data-start=\"2881\" data-end=\"2984\">When comparing different single phase SPDs, several parameters are critical for proper selection:<\/p>\r\n\r\n<ul data-start=\"2986\" data-end=\"3881\">\r\n \t<li data-start=\"2986\" data-end=\"3181\">\r\n<p data-start=\"2988\" data-end=\"3181\"><strong data-start=\"2988\" data-end=\"3033\">Uc (Maximum Continuous Operating Voltage)<\/strong>: The maximum RMS voltage the device can handle without degradation. For 230\/240V systems, the standard value is 275V AC between line and neutral.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3182\" data-end=\"3307\">\r\n<p data-start=\"3184\" data-end=\"3307\"><strong data-start=\"3184\" data-end=\"3217\">Up (Voltage Protection Level)<\/strong>: The clamped voltage during a surge. Sensitive electronics require Up below 1.5\u20132.5 kV.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3308\" data-end=\"3473\">\r\n<p data-start=\"3310\" data-end=\"3473\"><strong data-start=\"3310\" data-end=\"3344\">In (Nominal Discharge Current)<\/strong>: The current the SPD can discharge repeatedly without failure. A good single-phase SPD should handle at least 20 kA (8\/20 \u00b5s).<\/p>\r\n<\/li>\r\n \t<li data-start=\"3474\" data-end=\"3601\">\r\n<p data-start=\"3476\" data-end=\"3601\"><strong data-start=\"3476\" data-end=\"3512\">Imax (Maximum Discharge Current)<\/strong>: The maximum current the SPD can withstand in a single event, typically 40 kA or more.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3602\" data-end=\"3759\">\r\n<p data-start=\"3604\" data-end=\"3759\"><strong data-start=\"3604\" data-end=\"3630\">Iimp (Impulse Current)<\/strong>: Specific for Type 1 SPDs, tested with 10\/350 \u00b5s waveform. Values start at 12.5 kA, with 25 kA recommended in high-risk areas.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3760\" data-end=\"3881\">\r\n<p data-start=\"3762\" data-end=\"3881\"><strong data-start=\"3762\" data-end=\"3779\">Response Time<\/strong>: SPDs act in nanoseconds. The faster the reaction, the better protection for sensitive electronics.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"3883\" data-end=\"4010\">These parameters should always be matched with the system\u2019s exposure level, earthing type, and equipment insulation category.<\/p>\r\n\r\n<h2 data-start=\"4017\" data-end=\"4064\">System Earthing and Wiring Configurations<\/h2>\r\n<p data-start=\"4065\" data-end=\"4202\">Earthing type is often overlooked, but it is one of the most decisive factors when choosing a Single-Phase Surge Protection Device.<\/p>\r\n\r\n<ul data-start=\"4204\" data-end=\"4774\">\r\n \t<li data-start=\"4204\" data-end=\"4497\">\r\n<p data-start=\"4206\" data-end=\"4497\"><strong data-start=\"4206\" data-end=\"4220\">TT Systems<\/strong>: Require 1P+N (also called 1+1) SPD. This configuration uses MOV protection between line and neutral, plus a spark gap or dedicated element between neutral and PE. It ensures controlled discharge to earth, which is vital in TT where neutral potential can rise during faults.<\/p>\r\n<\/li>\r\n \t<li data-start=\"4498\" data-end=\"4670\">\r\n<p data-start=\"4500\" data-end=\"4670\"><strong data-start=\"4500\" data-end=\"4526\">TN-S or TN-C-S Systems<\/strong>: Can use either 1P or 1P+N depending on the design of the distribution board. Both line-to-neutral and line-to-earth paths must be protected.<\/p>\r\n<\/li>\r\n \t<li data-start=\"4671\" data-end=\"4774\">\r\n<p data-start=\"4673\" data-end=\"4774\"><strong data-start=\"4673\" data-end=\"4689\">TN-C Systems<\/strong>: Usually apply 1P or 2P SPDs depending on whether the PEN conductor is accessible.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"4776\" data-end=\"5017\">For all systems, wiring rules remain the same: keep the SPD\u2019s connection to earth as short as possible, ideally less than 0.5 m. Long leads increase inductance and therefore increase the residual voltage that the protected device will see.<\/p>\r\n\r\n<h2 data-start=\"5024\" data-end=\"5058\">Step-by-Step Selection Guide<\/h2>\r\n<p data-start=\"5060\" data-end=\"5255\">This is the heart of the decision-making process. Many engineers and buyers search specifically for how to choose a single phase SPD, so this section provides a detailed, practical roadmap:<\/p>\r\n\r\n<h3 data-start=\"5257\" data-end=\"5559\"><strong data-start=\"5257\" data-end=\"5295\">Step 1: Evaluate Risk and Exposure<\/strong><\/h3>\r\n<p data-start=\"5257\" data-end=\"5559\">Determine whether the building has an external lightning protection system (LPS) or is supplied by overhead lines. If yes, a Type 1 SPD at the service entrance is mandatory. For underground supplies in low-risk areas, a high-capacity Type 2 may be sufficient.<\/p>\r\n\r\n<h3 data-start=\"5561\" data-end=\"5803\"><strong data-start=\"5561\" data-end=\"5601\">Step 2: Identify the Earthing System<\/strong><\/h3>\r\n<p data-start=\"5561\" data-end=\"5803\">Check whether your installation is TT, TN-S, TN-C-S, or TN-C. This determines if you need a 1P SPD, a 1P+N SPD, or a 2P SPD. Selecting the wrong wiring configuration can render the SPD ineffective.<\/p>\r\n\r\n<h3 data-start=\"5805\" data-end=\"5846\"><strong data-start=\"5805\" data-end=\"5844\">Step 3: Define the Protection Stage<\/strong><\/h3>\r\n<ul data-start=\"5847\" data-end=\"6077\">\r\n \t<li data-start=\"5847\" data-end=\"5908\">\r\n<p data-start=\"5849\" data-end=\"5908\">At the service entrance: Type 1 or Type 1+2 combined SPD.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5909\" data-end=\"5978\">\r\n<p data-start=\"5911\" data-end=\"5978\">At distribution panels: Type 2, with In \u2265 20 kA and Imax \u2265 40 kA.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5979\" data-end=\"6077\">\r\n<p data-start=\"5981\" data-end=\"6077\">At sensitive loads: Type 3, to reduce Up below the insulation withstand of electronic devices.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"6079\" data-end=\"6159\"><strong data-start=\"6079\" data-end=\"6115\">Step 4: Select Technical Ratings<\/strong><\/h3>\r\n<p data-start=\"6079\" data-end=\"6159\">Match the SPD\u2019s ratings to your system:<\/p>\r\n\r\n<ul data-start=\"6160\" data-end=\"6369\">\r\n \t<li data-start=\"6160\" data-end=\"6197\">\r\n<p data-start=\"6162\" data-end=\"6197\">Uc: 275V AC for 230\/240V systems.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6198\" data-end=\"6304\">\r\n<p data-start=\"6200\" data-end=\"6304\">Up: Must be lower than the equipment insulation category (IEC 60664: Cat II \u2248 2.5 kV, Cat III \u2248 4 kV).<\/p>\r\n<\/li>\r\n \t<li data-start=\"6305\" data-end=\"6369\">\r\n<p data-start=\"6307\" data-end=\"6369\">In\/Imax\/Iimp: According to installation level and risk zone.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"6371\" data-end=\"6689\"><strong data-start=\"6371\" data-end=\"6415\">Step 5: Plan Coordination Between Stages<\/strong><\/h3>\r\n<p data-start=\"6371\" data-end=\"6689\">SPDs must work together. The upstream device must absorb energy without passing destructive voltage downstream, while the downstream SPD fine-tunes protection. Maintain at least 10 meters between devices, or insert decoupling inductance to ensure proper energy sharing.<\/p>\r\n\r\n<h3 data-start=\"6691\" data-end=\"6928\"><strong data-start=\"6691\" data-end=\"6739\">Step 6: Ensure Proper Overcurrent Protection<\/strong><\/h3>\r\n<p data-start=\"6691\" data-end=\"6928\">Every SPD requires backup protection. Unless the SPD includes an integrated fuse, install an MCB or fuse in series. This prevents short-circuit events when the SPD reaches end of life.<\/p>\r\n\r\n<h3 data-start=\"6930\" data-end=\"7027\"><strong data-start=\"6930\" data-end=\"6979\">Step 7: Consider Service Life and Maintenance<\/strong><\/h3>\r\n<p data-start=\"6930\" data-end=\"7027\">SPDs degrade over time. Choose models with:<\/p>\r\n\r\n<ul data-start=\"7028\" data-end=\"7241\">\r\n \t<li data-start=\"7028\" data-end=\"7093\">\r\n<p data-start=\"7030\" data-end=\"7093\">Status indication windows that show green\/red conditions.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7094\" data-end=\"7162\">\r\n<p data-start=\"7096\" data-end=\"7162\">Remote signaling contacts for monitoring in control systems.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7163\" data-end=\"7241\">\r\n<p data-start=\"7165\" data-end=\"7241\">Replaceable plug-in modules, so maintenance does not require rewiring.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"7243\" data-end=\"7418\">Following this step-by-step process ensures that your single phase SPD is not only correctly rated but also correctly installed and maintained for long-term reliability.<\/p>\r\n\r\n<h2 data-start=\"7425\" data-end=\"7476\">Practical Installation Tips and Common Errors<\/h2>\r\n<p data-start=\"7478\" data-end=\"7602\">Even the best single phase protection devices will fail if installed incorrectly. Follow these engineering principles:<\/p>\r\n\r\n<ul data-start=\"7604\" data-end=\"7913\">\r\n \t<li data-start=\"7604\" data-end=\"7653\">\r\n<p data-start=\"7606\" data-end=\"7653\">Keep leads short and direct, less than 0.5 m.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7654\" data-end=\"7716\">\r\n<p data-start=\"7656\" data-end=\"7716\">Separate power and signal cables to avoid coupling surges.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7717\" data-end=\"7769\">\r\n<p data-start=\"7719\" data-end=\"7769\">Do not bundle SPD leads with protected circuits.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7770\" data-end=\"7844\">\r\n<p data-start=\"7772\" data-end=\"7844\">Always connect the SPD earth to the closest equipotential bonding bar.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7845\" data-end=\"7913\">\r\n<p data-start=\"7847\" data-end=\"7913\">Respect the coordination distances between different SPD stages.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"7915\" data-end=\"8130\">Common mistakes include installing only one stage, forgetting N-PE protection in TT systems, or oversizing SPDs without actual need. Each of these reduces protection efficiency and increases costs without benefit.<\/p>\r\n\r\n<h2 data-start=\"8137\" data-end=\"8163\">Example Applications<\/h2>\r\n<ul data-start=\"8165\" data-end=\"8850\">\r\n \t<li data-start=\"8165\" data-end=\"8343\">\r\n<p data-start=\"8167\" data-end=\"8343\"><strong data-start=\"8167\" data-end=\"8195\">Residential Applications<\/strong>: A Type 2 SPD (In 20 kA, Imax 40 kA, Up &lt; 1.5 kV) installed in the main distribution board protects household electronics from grid disturbances.<\/p>\r\n<\/li>\r\n \t<li data-start=\"8344\" data-end=\"8498\">\r\n<p data-start=\"8346\" data-end=\"8498\"><strong data-start=\"8346\" data-end=\"8370\">Commercial Buildings<\/strong>: A Type 1+2 SPD at the main switchboard combined with Type 2 SPDs at floor distribution panels ensures continuity of service.<\/p>\r\n<\/li>\r\n \t<li data-start=\"8499\" data-end=\"8673\">\r\n<p data-start=\"8501\" data-end=\"8673\"><strong data-start=\"8501\" data-end=\"8526\">Industrial Facilities<\/strong>: Type 1 SPDs rated at 25 kA Iimp at the service entrance, with coordinated Type 2 SPDs in motor control centers and Type 3 SPDs protecting PLCs.<\/p>\r\n<\/li>\r\n \t<li data-start=\"8674\" data-end=\"8850\">\r\n<p data-start=\"8676\" data-end=\"8850\"><strong data-start=\"8676\" data-end=\"8696\">Solar PV Systems<\/strong>: On the DC side, use PV-rated SPDs. On the AC side, a Type 2 single-phase SPD at the inverter output protects both the inverter and the grid interface.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"8857\" data-end=\"8873\">Conclusion<\/h2>\r\n<p data-start=\"8875\" data-end=\"9090\">Choosing the right Single-Phase Surge Protection Device requires more than scanning a datasheet. It means understanding your system, evaluating risks, applying IEC standards, and matching parameters carefully.<\/p>\r\n\r\n<ul data-start=\"9092\" data-end=\"9348\">\r\n \t<li data-start=\"9092\" data-end=\"9151\">\r\n<p data-start=\"9094\" data-end=\"9151\">At the entrance, protect against lightning with Type 1.<\/p>\r\n<\/li>\r\n \t<li data-start=\"9152\" data-end=\"9203\">\r\n<p data-start=\"9154\" data-end=\"9203\">In distribution, rely on robust Type 2 devices.<\/p>\r\n<\/li>\r\n \t<li data-start=\"9204\" data-end=\"9266\">\r\n<p data-start=\"9206\" data-end=\"9266\">For sensitive electronics, add Type 3 at the point of use.<\/p>\r\n<\/li>\r\n \t<li data-start=\"9267\" data-end=\"9348\">\r\n<p data-start=\"9269\" data-end=\"9348\">Always respect your earthing system, wiring practices, and maintenance needs.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"9350\" data-end=\"9539\">By applying these principles, electrical engineers and procurement professionals can ensure that their systems are not only compliant but also resilient, cost-effective, and future-ready.<\/p>"},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/ko\/wp-json\/wp\/v2\/blog\/2176","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/ko\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/ko\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/ko\/wp-json\/wp\/v2\/media\/2175"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/ko\/wp-json\/wp\/v2\/media?parent=2176"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/ko\/wp-json\/wp\/v2\/blog_category?post=2176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}