{"id":6140,"date":"2022-06-25T19:37:28","date_gmt":"2022-06-25T10:37:28","guid":{"rendered":"http:\/\/ftz.myds.me\/wordpress\/?p=6140"},"modified":"2023-01-02T21:05:52","modified_gmt":"2023-01-02T12:05:52","slug":"%ea%b3%a0%ec%9e%a5-%ec%9e%84%ed%94%bc%eb%8d%98%ec%8a%a4","status":"publish","type":"post","link":"http:\/\/ftz.myds.me\/wordpress\/%ea%b3%a0%ec%9e%a5-%ec%9e%84%ed%94%bc%eb%8d%98%ec%8a%a4\/","title":{"rendered":"\uace0\uc7a5 \uc784\ud53c\ub358\uc2a4\u2055"},"content":{"rendered":"\n<p><meta charset=\"utf-8\">[acf field=ver]\u2605[acf field=rate]![acf field=edited] <\/p>\n\n\n\n<p class=\"has-text-align-right\">\uc784\ud53c\ub358\uc2a4<\/p>\n\n\n\n<h3>\uc804\uc6d0 \uc784\ud53c\ub358\uc2a4<\/h3>\n\n\n\n<p>\ud55c\uc804\uc5d0\uc11c\ub294 \ubc1c\uc804\uc18c \ubc0f \ubcc0\uc804\uc18c\uc5d0 \ub300\ud558\uc5ec \uc815\uae30\uc801\uc73c\ub85c \uacc4\uc0b0\ud558\uc5ec \uc81c\uc2dc\ud558\uace0 \uc788\uc73c\uba70 \ud55c\uc804\uc5d0 \ud611\uc870\ub97c \uc694\uccad\ud558\uc5ec \uad6c\ud55c\ub2e4.<\/p>\n\n\n\n<p>22.9kV\ub85c \uc218\uc804\ubc1b\ub294 \uc218\uc6a9\uac00\uc758 \uacbd\uc6b0\uc5d0\ub294 \ud55c\uc804 154kV \ubcc0\uc804\uc18c\uc758 \ubcc0\uc555\uae30\uc758 \uc6a9\ub7c9 45\/60MVA, %Z: 14.5%(45MVA \uae30\uc900), \uc774\uac83\uc73c\ub85c\ubd80\ud130 \uacc4\uc0b0\ud558\uac70\ub098 \uac1c\ub7b5\uc801\uc73c\ub85c 500MVA (X\/R\ube44: 10)\uc815\ub3c4\ub85c \ud558\uba74 \uc2e4\uc6a9\uc801\uc73c\ub85c \ubb38\uc81c\uac00 \uc5c6\ub2e4.<\/p>\n\n\n\n<p>\ud55c\uc804\uc5d0\uc11c \uc81c\uc2dc\ub418\ub294 \uc784\ud53c\ub358\uc2a4\ub294 100MVA\ub97c \uae30\uc900\uc73c\ub85c \ud558\uc5ec \uc81c\uc2dc\ub418\uace0 \uc788\uc73c\uba70, \uc804\uc6d0\uce21 \uc784\ud53c\ub358\uc2a4\ub97c \uae30\uc900\uc6a9\ub7c9\uc73c\ub85c \ud658\uc0b0\ud558\ub294 \uacbd\uc6b0\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<p>\u00b7 \ub2e8\ub77d\uc6a9\ub7c9:<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[P_s=\\sqrt{3}VI_s\\cdot\\cdot\\cdot I_s=\\frac{100}{\\% Z}\\times I_b\\]<script src='http:\/\/ftz.myds.me\/wordpress\/wp-includes\/js\/dist\/vendor\/regenerator-runtime.min.js?ver=0.13.9' id='regenerator-runtime-js'><\/script>\n<script src='http:\/\/ftz.myds.me\/wordpress\/wp-includes\/js\/dist\/vendor\/wp-polyfill.min.js?ver=3.15.0' id='wp-polyfill-js'><\/script>\n<script src='http:\/\/ftz.myds.me\/wordpress\/wp-includes\/js\/dist\/hooks.min.js?ver=4169d3cf8e8d95a3d6d5' id='wp-hooks-js'><\/script>\n<script src='http:\/\/ftz.myds.me\/wordpress\/wp-includes\/js\/dist\/i18n.min.js?ver=9e794f35a71bb98672ae' id='wp-i18n-js'><\/script>\n<script id='wp-i18n-js-after'>\nwp.i18n.setLocaleData( { 'text direction\\u0004ltr': [ 'ltr' ] } );\n<\/script>\n<script  async src='https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/mathjax\/2.7.7\/MathJax.js?config=TeX-MML-AM_CHTML' id='mathjax-js'><\/script>\n<\/div>\n\n\n\n<p><br>\u00b7 \ub2e8\ub77d\uc6a9\ub7c9\uacfc \uae30\uc900\uc6a9\ub7c9\uacfc\uc758 \uad00\uacc4<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[P_s=\\sqrt{3}VI_b\\times\\frac{100}{\\% Z}=P_b\\times\\frac{100}{\\% Z}\\]<\/div>\n\n\n\n<p>\u00b7 \uae30\uc900\uc6a9\ub7c9 \ud658\uc0b0 \uc804\uc6d0\uce21 % \uc784\ud53c\ub358\uc2a4<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\%Z=\\frac{P_b}{P_s}\\times 100\\]<\/div>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<p>\u00b7 \uae30\uc900\uc6a9\ub7c9 100MVA\ub85c \ud658\uc0b0\ud55c \uc804\uc6d0\uce21 % \uc784\ud53c\ub358\uc2a4<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\%Z=\\frac{P_b}{P_s}\\times100=\\frac{100}{500}\\times 100=20[\\%]\\]<\/div>\n\n\n\n<p>\u00b7 R\/X\ube44 10\uc744 \uc801\uc6a9<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\%R=\\%Z\\times \\cos(\\tan^{-1}X\/R)\\]\\[=20\\times \\cos(\\tan^{-1}10)=1.99[\\%]\\]\n\\[\\]\n\\[\\%X=\\%Z\\times \\sin(\\tan^{-1}X\/R)\\]\\[=20\\times \\sin(\\tan^{-1}10)=19.90[\\%]\\]\n\\[\\]\n\\[\\%Z=1.99+j19.90\\]<\/div>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<p>\u00b7 R\/X\ube44 \uc801\uc6a9 \ubc29\ubc95<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/RX\u1107\u1175\u110c\u1165\u11a8\u110b\u116d\u11bc\u1107\u1161\u11bc\u1107\u1165\u11b8.png\" alt=\"\" class=\"wp-image-9794\" width=\"173\" height=\"166\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/RX\u1107\u1175\u110c\u1165\u11a8\u110b\u116d\u11bc\u1107\u1161\u11bc\u1107\u1165\u11b8.png 424w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/RX\u1107\u1175\u110c\u1165\u11a8\u110b\u116d\u11bc\u1107\u1161\u11bc\u1107\u1165\u11b8-300x289.png 300w\" sizes=\"(max-width: 173px) 100vw, 173px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\tan\\theta=\\frac{X}{R}\\to\\theta=\\tan^{-1}(\\frac{X}{R})\\]\n\\[R=Z\\times\\cos\\theta\\]\n\\[X=Z\\times\\sin\\theta\\]<\/div>\n\n\n\n<h4>\ucf00\uc774\ube14 \uc784\ud53c\ub358\uc2a4<\/h4>\n\n\n\n<p>\uc804\uae30\uc124\ube44 \uae30\uc220\uacc4\uc0b0 \ud578\ub4dc\ubd81 \ub4f1\uc758 \uc790\ub8cc\uc9d1 Data\ub97c \ucc38\uc870\ud558\uac70\ub098 \uc81c\uc791\uc5c5\uccb4\uc758 Data\ub97c \uc774\uc6a9\ud558\uc5ec \uacc4\uc0b0\ud55c\ub2e4. 22.9kV, 60mm<sup>2<\/sup> CV\ucf00\uc774\ube14\uc758 \uc120\ub85c\uc815\uc218\uac00 0.389\uff0bj0.175[\u03a9\/\u339e]\ub85c \uc8fc\uc5b4\uc9c0\uace0, \uc120\ub85c\uc758 \uae38\uc774\uac00 1.5km\ub77c \ud558\uba74, \uae30\uc900\uc6a9\ub7c9\uc744 1,000kVA\ub85c \ud588\uc744 \uacbd\uc6b0\uc758 %\uc784\ud53c\ub358\uc2a4 \uac12\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<p>\u00b7 \uae30\uc900 \uc784\ud53c\ub358\uc2a4 \uc0b0\ucd9c<br>\uae30\uc900 \uc6a9\ub7c9: 1,000kVA, \uae30\uc900\uc804\uc555: 22.9kV\uc5d0\uc11c \uae30\uc900 \uc784\ud53c\ub358\uc2a4<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[Z_b=\\frac{V^2[kV]}{P[MVA]}=\\frac{22.9^2}{1}=524.41[\\Omega]\\]<\/div>\n\n\n\n<p>\u00b7 \ucf00\uc774\ube14\uc758 \uc2e4\uc81c \uc784\ud53c\ub358\uc2a4 \ud658\uc0b0(1)\u2026\u2026..\uae30\uc900 \uc784\ud53c\ub358\uc2a4 \ud65c\uc6a9(\ucd94\ucc9c)<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\%Z=\\frac{(0.389+j0.175)\\times 1.5}{524.41}\\times 100\\]\\[=0.111+j0.05[\\%]\\]<\/div>\n\n\n\n<p>\u00b7 \ucf00\uc774\ube14\uc758 \uc2e4\uc81c \uc784\ud53c\ub358\uc2a4 \ud658\uc0b0(2)<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\%R=\\frac{P[kVA]\\times R[\\Omega]}{10V^2[kV]}\\]\\[=\\frac{1,000\\times 0.389\\times 1.5}{10\\times 22.9^2}=0.111[\\%]\\]<\/div>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\%X=\\frac{P[kVA]\\times X[\\Omega]}{10V^2[kV]}\\]\\[=\\frac{1,000\\times 0.175\\times 1.5}{10\\times 22.9^2}=0.05[\\%]\\]<\/div>\n\n\n\n<h4>\ubcc0\uc555\uae30 \uc784\ud53c\ub358\uc2a4<\/h4>\n\n\n\n<p>\uc77c\ubc18\uc801\uc73c\ub85c \uc784\ud53c\ub358\uc2a4 \uac12\uc740 OA\/FA\uc77c \uacbd\uc6b0 OA\uae30\uc900\uc73c\ub85c \uba85\ud310\uc5d0 \uae30\ub85d\ub418\uba70, \ubcc0\uc555\uae30 \ud2b9\uc131\uc758 \ub370\uc774\ud130\ub97c \ud544\ud788 OA\uae30\uc900 \ub610\ub294 FA\uae30\uc900\uc774\ub2e4 \ub77c\ub294 \uac83\uc744 \ud655\uc778\ud574\uc57c \ud55c\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"386\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110b\u1161\u11b8\u1100\u1175-\u110b\u1175\u11b7\u1111\u1175\u1103\u1165\u11ab\u1109\u1173.png\" alt=\"\" class=\"wp-image-9795\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110b\u1161\u11b8\u1100\u1175-\u110b\u1175\u11b7\u1111\u1175\u1103\u1165\u11ab\u1109\u1173.png 1024w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110b\u1161\u11b8\u1100\u1175-\u110b\u1175\u11b7\u1111\u1175\u1103\u1165\u11ab\u1109\u1173-300x113.png 300w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110b\u1161\u11b8\u1100\u1175-\u110b\u1175\u11b7\u1111\u1175\u1103\u1165\u11ab\u1109\u1173-768x290.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h4>\ud68c\uc804\uae30 \uc784\ud53c\ub358\uc2a4<\/h4>\n\n\n\n<p>\uace0\uc7a5\uc804\ub958 \uacf5\uae09\uc6d0\uc774 \ud68c\uc804\uae30\uc778 \uacbd\uc6b0 \ud68c\uc804\uae30 \ub9ac\uc561\ud134\uc2a4\ub294 \uc77c\uc815\ud558\uc9c0 \uc54a\uace0 \uc2dc\uac04\uc5d0 \ub530\ub77c \ubcc0\ud654\ub418\uae30 \ub54c\ubb38\uc5d0 \uace0\uc7a5\uc804\ub958\ub3c4 \uc774\uc5d0 \ub530\ub77c \ubcc0\ud654\ub41c\ub2e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"932\" height=\"808\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1112\u116c\u110c\u1165\u11ab\u1100\u1175\u110b\u1175\u11b7\u1111\u1175\u1103\u1165\u11ab\u1109\u1173.png\" alt=\"\" class=\"wp-image-9797\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1112\u116c\u110c\u1165\u11ab\u1100\u1175\u110b\u1175\u11b7\u1111\u1175\u1103\u1165\u11ab\u1109\u1173.png 932w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1112\u116c\u110c\u1165\u11ab\u1100\u1175\u110b\u1175\u11b7\u1111\u1175\u1103\u1165\u11ab\u1109\u1173-300x260.png 300w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1112\u116c\u110c\u1165\u11ab\u1100\u1175\u110b\u1175\u11b7\u1111\u1175\u1103\u1165\u11ab\u1109\u1173-768x666.png 768w\" sizes=\"(max-width: 932px) 100vw, 932px\" \/><figcaption>\ud68c\uc804\uae30 \uc784\ud53c\ub358\uc2a4<\/figcaption><\/figure>\n\n\n\n<p>(1) \ucc28\uacfc\ub3c4 \ub9ac\uc561\ud134\uc2a4 (Xd&#8221;: Subtransient reactance)<\/p>\n\n\n\n<p>\uace0\uc7a5\uc774 \uc77c\uc5b4\ub09c \uccab\ubc88\uc9f8 \uc0ac\uc774\ud074(First Cycle)\ub3d9\uc548\uc758 \uc804\ub958\ub97c \uacb0\uc815\ud558\ub294 \ub9ac\uc561\ud134\uc2a4<\/p>\n\n\n\n<p>(2) \uacfc\ub3c4 \ub9ac\uc561\ud134\uc2a4 (Xd&#8217;: Transient reactance)<\/p>\n\n\n\n<p>\uace0\uc7a5\uc774 \uc77c\uc5b4\ub09c \uc218 \uc0ac\uc774\ud074 \ud6c4\uc758 \uace0\uc7a5\uc804\ub958\ub97c \uacb0\uc815\ud558\ub294 \ub9ac\uc561\ud134\uc2a4<\/p>\n\n\n\n<p>(3) \ub3d9\uae30 \ub9ac\uc561\ud134\uc2a4 (Xd: Synchronous reactance)<\/p>\n\n\n\n<p>\uc548\uc815\ub41c \uc0c1\ud0dc\uc5d0 \ub3c4\ub2ec\ud55c \ud6c4\uc5d0 \ud750\ub974\ub294 \uc804\ub958\ub97c \uacb0\uc815\ud558\ub294 \ub9ac\uc561\ud134\uc2a4<\/p>\n\n\n\n<p>[\ud45c.] IEEE\/ANSI Std.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>\uad6c\ubd84<\/td><td>1st <\/td><td>cycle<\/td><td>Fault<\/td><td>innter<\/td><td>rupting<\/td><td>cycle<\/td><\/tr><tr><td><\/td><td>X\/R<\/td><td>Xd&#8221;<\/td><td>MF<\/td><td>X\/R<\/td><td>Xd&#8221;<\/td><td>MF<\/td><\/tr><tr><td>50HP \ubbf8\ub9cc<\/td><td>9<\/td><td>17<\/td><td>1.67<\/td><td>9<\/td><td>17<\/td><td>&#8211;<\/td><\/tr><tr><td>50~150HP<\/td><td>9<\/td><td>17<\/td><td>1.2<\/td><td>9<\/td><td>17<\/td><td>3.0<\/td><\/tr><tr><td>250HP \ucd08\uacfc<\/td><td>9<\/td><td>17<\/td><td>1.0<\/td><td>9<\/td><td>17<\/td><td>1.5<\/td><\/tr><tr><td>1,000HP \ucd08\uacfc<\/td><td>30<\/td><td>17<\/td><td>1.0<\/td><td>30<\/td><td>17<\/td><td>1.5<\/td><\/tr><tr><td>\ub3d9\uae30 \uc804\ub3d9\uae30<\/td><td>30<\/td><td>20<\/td><td>1<\/td><td>30<\/td><td>20<\/td><td>1.5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h4>\u203b \uc720\ub3c4\uc804\ub3d9\uae30\uc758 \uac1c\ub7b5\uc801\uc778 \uc784\ud53c\ub358\uc2a4<\/h4>\n\n\n\n<p>\uc720\ub3c4 \uc804\ub3d9\uae30\uc758 \uae30\ub3d9\uc804\ub958\uac00 \uc8fc\uc5b4\uc9c4 \uacbd\uc6b0\uc5d0 \ud65c\uc6a9\ud558\ub294 \uac83\uc73c\ub85c, \uae30\ub3d9\uc804\ub958\ub294 \uc815\uaca9\uc804\ub958\uc758 \ubc30\uc218\uc774\uace0, \uc804\ub3d9\uae30\uc758 \uad6c\uc18d\uc804\ub958(Lock Rotor Current)\uc640 \uac19\uc73c\ubbc0\ub85c \ub2e4\uc74c\uacfc \uac19\uc774 \ub9ac\uc561\ud134\uc2a4\ub97c \uace0\ub824\ud55c\ub2e4.<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[X_d^{&#8221;}[pu]=\\frac{1}{I_{LRC}}\\]<\/div>\n\n\n\n<p>\uc800\uc555 440V, 100HP \uc804\ub3d9\uae30\uc758 \ub9ac\uc561\ud134\uc2a4\ub97c \uad6c\ud558\uc5ec\ub77c. \ub2e8, \uc804\ub3d9\uae30\uc758 \ucd5c\ub300 \uae30\ub3d9\uc804\ub958\ub294 \uc815\uaca9\uc804\ub958\uc758 6\ubc30\ub85c \uac00\uc815\ud55c\ub2e4.<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[X&#8221;_d=\\frac{1}{6}=0.17[pu]\\]<\/div>\n\n\n\n<p>\u25cb Interrupting cycle Fault \uacc4\uc0b0\uc2dc:<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[X&#8217;_d=0.167 \\times MF(3.0)\\]<\/div>\n\n\n\n<h4>\u203b \ud68c\uc804\uae30 \uc784\ud53c\ub358\uc2a4\uc758 \uae30\uc900\uc6a9\ub7c9 \ud658\uc0b0\uc2dc \uc8fc\uc758\uc0ac\ud56d<\/h4>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\%X_{d,new}=\\%X_{d,old}\\times\\frac{P_{base}}{P_{self}}\\times(\\frac{MV}{SV})^2\\]\n\\[MV:\ud68c\uc804\uae30 \uc815\uaca9\uc804\uc555\\]\\[SV:\ud68c\uc804\uae30 \uc5f0\uacb0\ubaa8\uc120 \uc815\uaca9\uc804\uc555\\]<\/div>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<pre class=\"wp-block-verse\">3.3kV, 250HP, \uc5ed\ub960 80%\uc778 \uace0\uc555\uc720\ub3c4\uc804\ub3d9\uae30\uac00 3.45kV \ubaa8\uc120\uc5d0 \uc811\uc18d\ub418\uc5b4 \uc788\uc744 \uacbd\uc6b0 \uae30\uc900\uc6a9\ub7c9 10MVA\ub85c \uc784\ud53c\ub358\uc2a4\ub97c \ubcc0\ud658\ud558\uc5ec\ub77c.<br>\ub2e8, \ucc28\uacfc\ub3c4 \ub9ac\uc561\ud134\uc2a4 17%, \uc218\uc6a9\uc728(Demand Factor): 95%<\/pre>\n\n\n\n<p>\u25cb \uc804\ub3d9\uae30\uc758 \uc6a9\ub7c9<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[P[kVA]=\\frac{HP\\times 0.746[kW]}{\\cos\\theta \\times DF}\\]\\[=\\frac{250\\times 0.746}{0.8\\times 0.95}=245[kVA]\\]<\/div>\n\n\n\n<p>-&gt; \uc5ed\ub960 80%\uc5d0\uc11c\ub294 HP\ucd9c\ub825[kW]\uc744 \uc6a9\ub7c9[kVA]\ub85c \ubc14\ub85c \uc801\uc6a9\ud574\ub3c4 \ubb34\uad00<br>-&gt; \uc5ec\uae30\uc5d0 Demand Factor\uac00 \uc8fc\uc5b4\uc9c4 \uacbd\uc6b0 \uace0\ub824<br>\u25cb \uc804\ub3d9\uae30 \ub9ac\uc561\ud134\uc2a4 \uae30\uc900\uc6a9\ub7c9\uc73c\ub85c \ud658\uc0b0<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\\%X&#8221;_{d,new}=17\\times\\frac{10\\times 10^3}{245}\\times(\\frac{3.3}{3.45})^2\\]\\[=635[\\%]\\]<\/div>\n\n\n\n<p>-&gt; Interrupting cycle Fault \uacc4\uc0b0\uc2dc \uc774 \uac12\uc5d0 1.5\ubc30 \uc801\uc6a9<\/p>\n\n\n\n<h6><strong><em>\u2605<a href=\"http:\/\/ftz.myds.me\/wordpress\/j-%ea%b3%a0%ec%9e%a5%ea%b3%84%ec%82%b0\/\">\uace0\uc7a5\uacc4\uc0b0<\/a> <br><a href=\"http:\/\/ftz.myds.me\/wordpress\/%ea%b3%a0%ec%9e%a5-%ea%b3%84%ec%82%b0%ec%9d%98-%ea%b8%b0%ec%b4%88\/\">\uace0\uc7a5 \uacc4\uc0b0\uc758 \uae30\ucd08\u2055<br><\/a>&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/%ed%8d%bc%ec%84%bc%ed%8a%b8-%ec%9e%84%ed%94%bc%eb%8d%98%ec%8a%a4\/\">\ud37c\uc13c\ud2b8 \uc784\ud53c\ub358\uc2a4<\/a>\u2055<br>&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/%ea%b3%a0%ec%9e%a5-%ec%8b%9c%ea%b0%84%ec%97%90-%eb%94%b0%eb%a5%b8-%eb%b6%84%eb%a5%98\/\">\uace0\uc7a5 \uc2dc\uac04\uc5d0 \ub530\ub978 \ubd84\ub958<\/a>\u2055<br>&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/%ea%b3%a0%ec%9e%a5-%ec%9e%84%ed%94%bc%eb%8d%98%ec%8a%a4\/\">\uace0\uc7a5 \uc784\ud53c\ub358\uc2a4<\/a>\u2055<br>&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/%ec%a0%84%eb%a0%a5%ea%b3%84%ed%86%b5-%eb%8b%a8%eb%9d%bd%ec%82%ac%ea%b3%a0%ec%97%90-%eb%8c%80%ed%95%9c-%ea%b3%bc%eb%8f%84-%ed%95%b4%ec%84%9d\/\">\uc804\ub825\uacc4\ud1b5 \ub2e8\ub77d\uc0ac\uace0\uc5d0 \ub300\ud55c \uacfc\ub3c4 \ud574\uc11d<\/a>\u2055<\/em><\/strong><br><strong><em><br><a href=\"http:\/\/ftz.myds.me\/wordpress\/%eb%b3%80%ed%99%98%ec%9d%98-%ea%b8%b0%ec%b4%88\/\">\ubcc0\ud658\uc758 \uae30\ucd08<\/a><\/em><\/strong>\u2055<\/h6>\n\n\n\n<p>I&nbsp;<a href=\"https:\/\/cq4l.com\/%EB%8B%A8%EB%9D%BD%EC%A0%84%EB%A5%98-%EA%B8%B0%EB%B3%B8%EC%9D%B4%EB%A1%A0\/\">\ub2e8\ub77d\uc804\ub958(\uae30\ubcf8\uc774\ub860)<\/a><br>\u2192A&nbsp;<a href=\"https:\/\/cq4l.com\/%ea%b8%b0%ec%97%ac%ec%a0%84%eb%a5%98\/\">\uae30\uc5ec\uc804\ub958<\/a><br>\u2192Z&nbsp;<a href=\"https:\/\/cq4l.com\/%EB%8B%A8%EB%9D%BD%EC%A0%84%EB%A5%98-%EC%A2%85%EB%A5%98\/\">\ub2e8\ub77d\uc804\ub958(\uc885\ub958)<\/a><br>C&nbsp;<a href=\"https:\/\/cq4l.com\/%EB%8B%A8%EB%9D%BD%EC%A0%84%EB%A5%98-%EA%B3%84%EC%82%B0%EB%B2%95-%EC%A2%85%EB%A5%98\/\">\ub2e8\ub77d\uc804\ub958(\uacc4\uc0b0\ubc95 \uc885\ub958)<\/a><br>\u2192Y&nbsp;<a href=\"https:\/\/cq4l.com\/%EB%8C%80%EC%B9%AD%EC%A2%8C%ED%91%9C%EB%B2%95\/\">\ub300\uce6d\uc88c\ud45c\ubc95<\/a><br>P&nbsp;<a href=\"https:\/\/cq4l.com\/%EC%88%98%EB%B3%80%EC%A0%84%EC%84%A4%EB%B9%84-%EB%8B%A8%EB%9D%BD%EC%9A%A9%EB%9F%89-%EA%B2%BD%EA%B0%90%EB%8C%80%EC%B1%85\/\">\ub2e8\ub77d\uc6a9\ub7c9 \uacbd\uac10\ub300\ucc45(\uc218\ubcc0\uc804\uc124\ube44)<\/a><br>\u2192N&nbsp;<a href=\"https:\/\/cq4l.com\/%EA%B3%84%ED%86%B5%EC%97%B0%EA%B3%84%EA%B8%B0\/\">\uacc4\ud1b5\uc5f0\uacc4\uae30<\/a><br>\u2192S<a href=\"https:\/\/cq4l.com\/%EC%B4%88%EC%A0%84%EB%8F%84-%ED%95%9C%EB%A5%98%EA%B8%B0\/\">\ucd08\uc804\ub3c4 \ud55c\ub958\uae30<\/a><\/p>\n\n\n\n<p>F\u00a0<a href=\"https:\/\/cq4l.com\/%EB%8B%A8%EB%9D%BD%EC%A0%84%EB%A5%98-%EA%B3%84%EC%82%B0-flow\/\">\ub2e8\ub77d\uc804\ub958(\uacc4\uc0b0)<\/a><br>\u21920\u00a0<a href=\"https:\/\/cq4l.com\/a%EC%A0%90%EA%B3%BC-b%EC%A0%90%EC%9D%98-%EB%8B%A8%EB%9D%BD%EC%A0%84%EB%A5%98-%EA%B3%84%EC%82%B0\/\">\ub2e8\ub77d\uc804\ub958 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href=\"http:\/\/ftz.myds.me\/wordpress\/%eb%b6%88%ed%8f%89%ed%98%95-%ea%b3%a0%ec%9e%a5%ed%95%b4%ec%84%9d\/\">\ubd88\ud3c9\ud615 \uace0\uc7a5\ud574\uc11d<\/a>\u2055<br>&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/1%ec%84%a0-%ec%a7%80%eb%9d%bd%ea%b3%a0%ec%9e%a5-%ec%98%88%ec%a0%9c\/\">\uc608\uc81c1(1\uc120\uc9c0\ub77d)<\/a>\u2055<br><meta charset=\"utf-8\">&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/1%ec%84%a0-%ec%a7%80%eb%9d%bd%ea%b3%a0%ec%9e%a5-%ec%98%88%ec%a0%9c2\/\">\uc608\uc81c2(1\uc120\uc9c0\ub77d)<\/a>\u2055<br><meta charset=\"utf-8\">&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/%ec%84%a0%ea%b0%84%eb%8b%a8%eb%9d%bd-%ec%98%88%ec%a0%9c3\/\">\uc608\uc81c3(\uc120\uac04\ub2e8\ub77d)<\/a>\u2055<br><meta charset=\"utf-8\">&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/1%ec%84%a0-%ec%a7%80%eb%9d%bd%ea%b3%a0%ec%9e%a5-%ec%98%88%ec%a0%9c4\/\">\uc608\uc81c4(1\uc120\uc9c0\ub77d)<\/a>\u2055<br><meta charset=\"utf-8\">&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/%ec%a7%80%eb%9d%bd-%ec%98%88%ec%a0%9c5\/\">\uc608\uc81c5(\uc9c0\ub77d)<\/a>\u2055<br><meta charset=\"utf-8\">&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/1%ec%84%a0%ec%a7%80%eb%9d%bd-%ec%98%88%ec%a0%9c6\/\">\uc608\uc81c6(1\uc120\uc9c0\ub77d)<\/a>\u2055<br><meta charset=\"utf-8\">&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/%eb%aa%a8%ec%84%a0-%ec%a7%80%eb%9d%bd-%ec%98%88%ec%a0%9c7\/\">\uc608\uc81c7(\ubaa8\uc120\uc9c0\ub77d)<\/a>\u2055<br><meta charset=\"utf-8\">&#8211;<a href=\"http:\/\/ftz.myds.me\/wordpress\/2%ec%84%a0-%ec%a7%80%eb%9d%bd-%ec%98%88%ec%a0%9c8\/\">\uc608\uc81c8(2\uc120\uc9c0\ub77d)<\/a> <\/strong><\/em>\u2055<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[acf field=ver]\u2605[acf field=rate]![acf field=edited] \uc784\ud53c\ub358\uc2a4 \uc804\uc6d0 \uc784\ud53c\ub358\uc2a4 \ud55c\uc804\uc5d0\uc11c\ub294 \ubc1c\uc804\uc18c \ubc0f \ubcc0\uc804\uc18c\uc5d0 \ub300\ud558\uc5ec \uc815\uae30\uc801\uc73c\ub85c \uacc4\uc0b0\ud558\uc5ec \uc81c\uc2dc\ud558\uace0 \uc788\uc73c\uba70 \ud55c\uc804\uc5d0 \ud611\uc870\ub97c \uc694\uccad\ud558\uc5ec \uad6c\ud55c\ub2e4. 22.9kV\ub85c \uc218\uc804\ubc1b\ub294 \uc218\uc6a9\uac00\uc758 \uacbd\uc6b0\uc5d0\ub294 \ud55c\uc804 154kV \ubcc0\uc804\uc18c\uc758 \ubcc0\uc555\uae30\uc758 \uc6a9\ub7c9 45\/60MVA, %Z: 14.5%(45MVA \uae30\uc900), \uc774\uac83\uc73c\ub85c\ubd80\ud130 \uacc4\uc0b0\ud558\uac70\ub098 \uac1c\ub7b5\uc801\uc73c\ub85c 500MVA (X\/R\ube44: 10)\uc815\ub3c4\ub85c \ud558\uba74 \uc2e4\uc6a9\uc801\uc73c\ub85c \ubb38\uc81c\uac00 \uc5c6\ub2e4. \ud55c\uc804\uc5d0\uc11c \uc81c\uc2dc\ub418\ub294 \uc784\ud53c\ub358\uc2a4\ub294 100MVA\ub97c \uae30\uc900\uc73c\ub85c \ud558\uc5ec \uc81c\uc2dc\ub418\uace0 \uc788\uc73c\uba70, \uc804\uc6d0\uce21 \uc784\ud53c\ub358\uc2a4\ub97c \uae30\uc900\uc6a9\ub7c9\uc73c\ub85c \ud658\uc0b0\ud558\ub294 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[508],"tags":[],"_links":{"self":[{"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/posts\/6140"}],"collection":[{"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/comments?post=6140"}],"version-history":[{"count":0,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/posts\/6140\/revisions"}],"wp:attachment":[{"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/media?parent=6140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/categories?post=6140"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/tags?post=6140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}