용량에 따른 전선굵기와 차단기 선정방법(퍼온글)

용량에 따른 전선굵기와 차단기 선정방법 <img width="1" height="11" class="pcol2b fil3" alt="" src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fblogimgs.naver.net%2Fimgs%2Fnblog%2Fspc.gif"> <a class="pcol2" href="http://blog.naver.com/PostList.nhn?blogId=kwar100&categoryNo=1&from=postList&parentCategoryNo=1">좋은지식만들기 </a> <img width="105" height="1" alt="" src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fblogimgs.naver.net%2Fimgs%2Fnblog%2Fspc.gif"> 2009.05.04. 11:38<img width="21" height="13" title="http://blog.naver.com/kwar100/40066593385" class="btn_urlcopy _setClipboard" id="copyBtn_kwar100_40066593385" alt="복사" src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fblogimgs.naver.net%2Fnblog%2Fbtn_urlcopy.gif"> <a class="fil5 pcol2" href="http://blog.naver.com/kwar100/40066593385" target="_top">http://blog.naver.com/kwar100/40066593385</a> <div class="btn_post_v"><a class="btn_translate btn_atype _goTran _param(40066593385) _transPosition _returnFalse" id="transBtn40066593385" href="http://blog.naver.com/PostView.nhn?blogId=kwar100&logNo=40066593385&redirect=Dlog&widgetTypeCall=true&topReferer=http%3A%2F%2Fmillky.com%2F%40origoni%2Fpost%2F67%3Flanguage%3Dko_kr#" target="_blank">번역하기</a> <a class="btn_vierw_v btn_atype _open_magazineviewer _param(40066593385|0|1|)" href="http://blog.naver.com/PostView.nhn?blogId=kwar100&logNo=40066593385&redirect=Dlog&widgetTypeCall=true&topReferer=http%3A%2F%2Fmillky.com%2F%40origoni%2Fpost%2F67%3Flanguage%3Dko_kr#" target="_blank">전용뷰어 보기</a> </div><div class="clear blank5"></div>                                         <div class="post-sub ptr" id="sendPost_from_service_40066593385" style="display: none;"></div> <div id="postViewArea"><div class="post-view pcol2 _param(1) _postViewArea40066593385" id="post-view40066593385">  <a name="[문서의 처음]" class="con_link" target="_blank"></a> 용량에 따른 전선굵기와 차단기 선정방법 용량에 따른 전선굵기와 차단기 선정  (단상2선식과 3상4선식) 한전규정에 따른 용량과 허용전류와 전선굵기와 차단기선정방법 참고사항 1, 단상P1=V*I*역률(kW)에서 I(부하전류)=P1/V*역률(A)    삼상4선식 P3=루트3*V*I*역률(kW)에서 I(부하전류)=P3/누트3*V*역률    부하전류는 단상220V는 1kW당 4.5A로 계산할것.               삼상4선식380/220V는 1kW당 1.5A로 계산할것. 2, 메인차단기(정격전류)용량은 단상220V는 1kW당 6A로 계산됨.                              삼상380/220V는 1kW당 2A로 계산됨. 3, 분기차단기(정격전류)용량은 단상에서는 1kW당 5A로 계산할것.   예시1) 단상 220V의 용량이 10킬로라고 가정하면 10kW*5A=50A        차단기는 50A를 선정한다.   예시2) 3상동력 380V의 용량이 10킬로라고 가정하면 10kW*1.7A=10.7        차단기는 15또는 20A를 선정한다.. 4. 단상용량(kW)*3=3상4선식용량(kW)    단상2선식220V이고 계약전력 24kW이상은 CT계량기 설치함. <a name="#4095035c" class="con_link" target="_blank"></a> <table width="559" height="315" style="border: currentColor; border-image: none; border-collapse: collapse;" border="1" cellspacing="0" cellpadding="1"><tbody><tr><td width="62" height="59" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">계약 전력 (kw)</td><td width="62" height="103" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;" rowspan="2">전선 굵기</td><td width="62" height="59" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">계약 전력 (kW)</td><td width="62" height="103" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;" rowspan="2">전선 굵기</td><td width="62" height="103" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;" rowspan="2">부 하 의 최대 전류</td><td width="62" height="103" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;" rowspan="2">NFB/ ELB 정격 전류 용량</td><td width="186" height="59" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;" colspan="3">CV케이블(가공용) 허용전류A</td></tr><tr><td width="62" height="43" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">단상 220V</td><td width="62" height="43" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">삼상 380V</td><td width="62" height="43" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">전선 굵기</td><td width="62" height="43" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">2C</td><td width="62" height="43" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">4C</td></tr><tr><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">2kW</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">2.5SQ</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">7kW</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">2.5SQ</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">12A</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">15A</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">2.5SQ</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">36A</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">32A</td></tr><tr><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">3kW</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">2.5SQ</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">9kW</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">2.5SQ</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">16A</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">20A</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">4SQ</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">49A</td><td width="62" height="28" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">42A</td></tr><tr><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">5kW</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">4SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">14kW</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">4SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">24A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">30A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">6SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">63A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">54A</td></tr><tr><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">6kW</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">6SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">18kW</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">6SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">32A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">40A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">10SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">86A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">75A</td></tr><tr><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">7kW</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">6SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">23kW</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">10SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">40A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">50A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">16SQ</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">115A</td><td width="62" height="24" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">100A</td></tr><tr><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">9kW</td><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">10SQ</td><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">28kW</td><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">16SQ</td><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">48A</td><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">60A</td><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">25SQ</td><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">149A</td><td width="62" height="25" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">127A</td></tr><tr><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">11kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">10SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">35kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">16SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">60A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">75A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">35SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">158A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">158A</td></tr><tr><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">14kW</td><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">16SQ</td><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">47kW</td><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">25SQ</td><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">80A</td><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">100A</td><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">50SQ</td><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">225A</td><td width="62" height="32" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">192A</td></tr><tr><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">19kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">25SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">59kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">35SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">100A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">125A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">70SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">289A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">246A</td></tr><tr><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">24kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">35SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">71kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">50SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">120A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">150A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">95SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">352A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">298A</td></tr><tr><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">29kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">35SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">89kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">70SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">140A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">175A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">120SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">410A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">346A</td></tr><tr><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">31kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">50SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">94kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">70SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">160A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">200A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">150SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">473A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">399A</td></tr><tr><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">35kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">70SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">106kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">70SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">180A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">225A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">185SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">542A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">456A</td></tr><tr><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">39kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">70SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">118kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">95SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">200A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">250A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">240SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">641A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">538A</td></tr><tr><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">49kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">95SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">142kW</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">120SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">240A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">300A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">300SQ</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">741A</td><td width="62" height="23" valign="center" style="border: 1px solid rgb(0, 0, 0); border-image: none;">621A</td></tr></tbody></table>   삼상4선식380/220V이고 계약전력 72kW이상은 CT계량기 설치함. 착안점1) 전선굵기와 차단기용량은 허용전류 이내로 선정한다.       2) 반드시 부하의 최대전류<차단기정격전류<전선의 허용전류, 이여야 한다. ※ 참고)부하전류: 부하에 소비되는 전류        정격전류(차단기용량): 기기의 평상시 작동할 때 전류        허용전류: 전선에 흐를 수 있는 최대의 전류치 ▶ “부하, 정격, 허용전류”는 한 몸이며 항상 따라다닌다. 표사용법 예시1) 1. 한전계약전력 단상220V,  19kw일 경우 차단기는 2P, 125A를 선정하고 오른쪽의 허용     전류표 2c항목에서 16sq는 115이고 25sq는 149이므로 차단기용량보다 높은 35sq사용 2. 한전 계약전력 삼상380/220v, 59kw일 경우 4p, 125A를 선정하고 오른쪽의 허용전류표     에서 4c항목에서 25sq는 127이고 35sq는 158이므로 차단기용량보다 높은 35sq 를사용. 표사용법 예시2)  3상4선식 18kw일 경우 메인차단기는 40A, 전선 굵기는 6sq란 의미입니다. 표사용법 예시3)  단상 7kw일 경우 메인차단기는 50A, 전선 굵기는 6sq란 의미입니다. ▶ 위의 표에서 차단기(정격전류)용량*0.052=접지선 굵기가 됩니다.  표사용법 예시)   차단기 용량  50A에서 접지선의 굵기는 50*0.052=2.6(즉4sq)   차단기 용량 100A에서 접지선의 굵기는 100*0.052=5.2(즉6sq)   차단기 용량 225A에서 접지선의 굵기는 225*0.052=11.7(즉16sq)를 선택합니다.            주의사항1.) 전선의 종류나 공사의 방법 전압 강하,등 여러 조건에 따라 틀려질 수 있습니다.             참고용으로 쓰세요.   <div class="autosourcing-stub-extra">[출처] <a href="http://blog.naver.com/kwar100/40066593385" target="_blank">용량에 따른 전선굵기와 차단기 선정방법 </a>|작성자 <a href="http://blog.naver.com/kwar100" target="_blank">천상의문</a></div> </div></div>