200kVA变压器低压侧为何要用4O0A主开关? 200KVA变压器,高压侧断路器是怎么选的,低压侧断路器是怎...
200kva\u7684\u53d8\u538b\u5668\u7528\u591a\u5927\u7684\u603b\u5f00\u5173\uff0c\u7535\u6d41\u662f\u591a\u5c11\uff0c \u8be5\u7528\u591a\u5927\u7684\u7535\u5bb9\uff0c\u7528\u51e0\u4e2a\u5462\uff01\u6c42\u8ba1\u7b97\u65b9\u6cd5\uff1f10KV/0.4KV\uff0c200kvA\u7684\u53d8\u538b\u5668\u4f4e\u538b\u4fa7\u989d\u5b9a\u7535\u7535\u6d41\uff1aI=200/(1.732*0.4)=288.7A
\u4f4e\u538b\u4fa7\u603b\u5f00\u5173\uff1a\u989d\u5b9a\u7535\u7535\u6d41\uff1a288.7A*(2-2.5)\u500d 630A
\u6709\u529f\u529f\u7387\uff1aP=1.732*0.38*288*0.8=151.6KW\uff08\u529f\u7387\u56e0\u6570\u63090.8\u8ba1\u7b97\uff09
\u65e0\u529f\u529f\u7387\uff1aQ=\u221aS^2-P^2=\u221a200^2-151.6^2=1230.5KVar
(\u9009\u7528\u7535\u5bb9\u5bb9\u91cf1230.5KVar\uff0c\u6bcf\u5757\u7535\u5bb9\u5bb9\u91cf\u4e0d\u4e00\u6837\uff0c\u6839\u636e\u60c5\u51b5\u9009\u7528)
\u4f60\u597d\uff01\u4f60\u53ef\u4ee5\u8fd9\u6837\u9009\uff1a
\u6839\u636e\u516c\u5f0fP=1.732UI,\u8ba1\u7b97\u51fa\u53d8\u538b\u5668\u9ad8\u538b\u4fa7\u548c\u4f4e\u538b\u4fa7\u7535\u6d41\uff0c\u9ad8\u538b\u6309\u989d\u5b9a\u7535\u6d41\u76841.1\u500d\u9009\u53d6\uff0c\u4f4e\u538b\u6309\u989d\u5b9a\u7535\u6d412\u500d\u9009\u53d6\uff0c\u6839\u636e\u7b97\u51fa\u6765\u7684\u6570\uff0c\u9009\u62e9\u63a5\u8fd1\u7684\u89c4\u683c\u578b\u53f7\u3002\u53ef\u4ee5\u9009\u5927\u70b9\u3002\u9ad8\u538b\u5c3d\u91cf\u9009\u771f\u7a7a\u65ad\u8def\u5668\uff0c\u4f4e\u538b\u968f\u610f\u9009\u3002
绛旓細搴旇璁叉槑鐧鍙樺帇鍣ㄤ綆鍘嬩晶鐢靛帇绛夌骇鍜屾帴绾挎柟寮忔墠鑳藉府浣犺绠楀紑鍏冲閲忋傛潯浠朵笉瓒宠琛ュ厖銆傜湅浣犵殑瀹归噺涓嶅ぇ锛屼及璁′綆鍘嬩晶鏄380V鐨勶紝鐞嗚涓婃渶澶у煎簲璇ユ槸304A鐨勭數娴併傝绠楋細200kv/A=200000w/380v/1.732锛.鏂矾鍣ㄦ槸鎸夐瀹氱數娴1.43鍊嶉夈 閫夋嫨400A鏂矾鍣ㄥ氨澶熶簡锛屼笉杩囪繃娴佹暣瀹氬间笉鑳借秴杩囬瀹氱數娴1.1鍊嶃
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绛旓細鐢靛姩鏈猴紙璐熻浇锛夌殑鑰楃數鍔熺巼锛岀敤kW鏉ヨ〃绀猴紝褰撶數鍔ㄦ満鐨勫姛鐜囧拰鐢靛帇涓瀹氭椂锛屽畠浠秷鑰楃殑鐢垫祦涓庡畠浠殑鍔熺巼鍥犳暟锛坈os蠁锛夋湁鍏筹紝璐熻浇鐢垫祦浼氶殢鍔熺巼鍥犳暟锛坈os蠁锛夊ぇ灏忚屾敼鍙橈紝褰揷os蠁锛1鏃讹紝1kVA锛1KW锛屽綋cos蠁灏忎簬1鏃讹紝1kW璐熻浇锛堝崰鐢級鐨勭數娴侊紴1kVA锛涜嫢璐熻浇鐨勫姛鐜囧洜鏁帮紳0.8,閭d箞200kVA鍙樺帇鍣鍙互鎷栧姩鐨勮礋杞戒笉璁...
绛旓細300瀹夛紝200梅锛0.38脳1.732)銆傛杩庤闂畐wwbaixindqcom銆
绛旓細10KV/0.4KV锛200kvA鐨勫彉鍘嬪櫒浣庡帇渚棰濆畾鐢电數娴侊細I=200/(1.732*0.4)=288.7A 浣庡帇渚ф诲紑鍏筹細棰濆畾鐢电數娴侊細288.7A*(2-2.5)鍊 630A 鏈夊姛鍔熺巼锛歅=1.732*0.38*288*0.8=151.6KW锛堝姛鐜囧洜鏁版寜0.8璁$畻锛夋棤鍔熷姛鐜囷細Q=鈭歋^2-P^2=鈭200^2-151.6^2=1230.5KVar (閫夌敤鐢靛瀹归噺1230.5...
绛旓細10/0.4kV绛夌骇锛浣庡帇渚棰濆畾鐢垫祦锛欼锛漃/1.732/U锛200/1.732/0.4鈮289(A)鐢垫祦浜掓劅鍣ㄨ嫢浣滀负鐢靛害璁¢噺锛屽簲鐢300/5鐢垫祦浜掓劅鍣紱鑻ヤ綔涓虹數娴佽〃鐩戣锛屽簲鐢500/5鐢垫祦浜掓劅鍣ㄣ
绛旓細200KVA鐨勫彉鍘嬪櫒浣庡帇渚棰濆畾鐢垫祦涓猴細288.7A 鍏佽瓒呰浇10%杩愯锛屾墍鏈澶х數娴佷负288.7*1.1锛316.8A 鍙樺帇鍣ㄨ兘甯﹁澶囪礋鑽凤紙棰濆畾鍊硷級锛歅=1.732*0.38*288*0.8=151.6KW 鏈澶у 锛歅=1.732*0.38*316.8*0.8锛166.8KW 鎵浠ユ渶澶у厑璁稿甫166.8鍗冪摝鐨勮礋杞姐166.8鍗冪摝鐨勮礋杞戒竴灏忔椂鐢ㄧ數閲忓嵆166.8搴︺備竴...
绛旓細200kVA鐨勫彉鍘嬪櫒浜屾渚э紙380V锛夎兘鎵垮彈鐨勮礋杞藉畨鍏ㄧ數娴佹槸锛200KVA/(鈭3x380V)鈮304A 濡傛灉浜屾渚х殑鐢靛帇鏄400V锛屽垯鐢垫祦鏄細200KVA/(鈭3x400V)鈮289A
绛旓細濡傛灉浣犵殑鍙樺帇鍣ㄤ綆鍘嬩晶鐢靛帇鏄0.4KV(400V),閭d箞浣庡帇渚ч瀹氱數娴佷负 200/(0.4*1.732) = 288.7A 杩欎釜鏄瀹氱數娴侊紝灏辨槸璇村鏋滆秴杩囪繖涓數娴佸彉鍘嬪櫒灏辫繃杞戒簡锛屾椂闂撮暱浜嗗彉鍘嬪櫒鍙戠儹瀹规槗鐑ф瘉銆