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批發(fā)韓國airmajor空調(diào)AMPS-1500F韓國代購中山立訊電氣有限公司直銷中山立訊電氣有限公司銷售韓國DONGYANG F&C 氫氧化鈉自動閥
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DONGYANG F&C 氫氧化鈉自動閥
BDD-1000S BDD-1100S BDD-1200S BDD-1300S BDD-1400S BDD-1500S
BDD-2000S BDD-2100S BDD-2200S BDD-2300S BDD-2400S BDD-2500S
BDD-3000S BDD-3100S BDD-3200S BDD-3300S BDD-3400S BDD-3500S
BDD-1010S BDD-1110S BDD-1210S BDD-1310S BDD-1410S BDD-1510S
BDD-2010S BDD-2110S BDD-2210S BDD-2310S BDD-2410S BDD-2510S
BDD-3010S BDD-3110S BDD-3210S BDD-3310S BDD-3410S BDD-3510S

　　功率因數(shù)表示一個負荷所需要的有功功率和視在功率的比值。即COS￠=P/S平常我們說的系統(tǒng)的功率因數(shù)是整個電力系統(tǒng)有功功率和視在功率的比值，電路的功率因數(shù)、線路的功率因數(shù)、電機的功率因數(shù)等也相同。在交流電路中，功率因數(shù)定義為有功功率與視在功率的比值，即COS∮＝P/S，在正弦電路中，功率因數(shù)由電壓與電流之間的相位差（∮）角決定，用COS∮表示，在數(shù)值上等于有功功率和視在功率之比，或電阻與阻抗之比�！　∵x擇斷路器（空氣開關）安培計算法1匹=735W≈750W1.5匹=1.5×750W=1125W2匹=2×750W=1500W2.5匹=2.5×750W=1875W此計算法以此類推。(1)例：3匹空調(diào)應選擇多少A的空氣開關。（220V電壓）750W×3匹=2250W×3倍（沖擊電流）=6750W÷220V=prefix=st1ns="urn:schemas-microsoft-com:office:smarttags"30.68A≈32A。

BDD-1020S BDD-1120S BDD-1220S BDD-1320S BDD-1420S BDD-1520S
BDD-2020S BDD-2120S BDD-2220S BDD-2320S BDD-2420S BDD-2520S
BDD-3020S BDD-3120S BDD-3220S BDD-3320S BDD-3420S BDD-3520S
BDD-1001S BDD-1101S BDD-1201S BDD-1301S BDD-1401S BDD-1501S
BDD-2001S BDD-2101S BDD-2201S BDD-2301S BDD-2401S BDD-2501S
BDD-3001S BDD-3101S BDD-3201S BDD-3301S BDD-3401S BDD-3501S
BDD-1011S BDD-1111S BDD-1211S BDD-1311S BDD-1411S BDD-1511S
BDD-2011S BDD-2111S BDD-2211S BDD-2311S BDD-2411S BDD-2511S

　　3)由于電流互感器的二次額定電流一般為標準的5A與1A，電流互感器的變比基本有一次電流額定電流的大小決定，所以在選擇一次電流額定電流時要核算正常運行測量儀表要運行在誤差范圍，繼電保護用次級又要滿足10％誤差要求�！　�4.在電壓互感器二次接線上在b相接地系統(tǒng)中，①中性點需裝設擊穿器，增加了部件，正常時如擊穿器擊穿接地，將使b相繞組短路。②當A、C兩相中任一相發(fā)生接地時，即構成二次繞組兩相短路，兩相熔斷器熔斷。在中性點接地系統(tǒng)中，無b相接地的相應問題，接線較簡單。

BDD-3011S BDD-3110S BDD-3211S BDD-3311S BDD-3411S BDD-3511S
BDD-1021S BDD-1121S BDD-1221S BDD-1321S BDD-1421S BDD-1521S
BDD-2021S BDD-2121S BDD-2221S BDD-2321S BDD-2421S BDD-2521S
BDD-3021S BDD-3121S BDD-3221S BDD-3321S BDD-3421S BDD-3521S
BDD-1002S BDD-1102S BDD-1202S BDD-1302S BDD-1402S BDD-1502S
BDD-2002S BDD-2102S BDD-2202S BDD-2302S BDD-2402S BDD-2502S
BDD-3002S BDD-3102S BDD-3202S BDD-3302S BDD-3402S BDD-3502S
BDD-1012S BDD-1112S BDD-1212S BDD-1312S BDD-1412S BDD-1512S
BDD-2012S BDD-2112S BDD-2212S BDD-2312S BDD-2412S BDD-2512S

　　個計算公式是（電流-電流）/電流；第二個計算公式是（MAX相電流-三相平均電流）/三相平均電流。舉個簡單的例子，三相電流分別為IA=9AIB=8AIC=4A，則三相平均電流為7A，相電流-三相平均電流分別為2A1A3A，取差值那個，故MAX（相電流-三相平均電流）=3A，所以三相電流不平衡度=3/7。　　 32，使用疊加原理計算線性電路應注意哪項事項應用疊加原理可以分別計算各個電壓源和電流源單獨作用下各支路的電壓和電流，然后疊加原理加起來，在應用疊加原理時應注意①該原理只能用來計算線性電流和電壓，對非線性。

BDD-3012S BDD-3110S BDD-3212S BDD-3312S BDD-3412S BDD-3512S
BDD-1022S BDD-1122S BDD-1222S BDD-1322S BDD-1422S BDD-1522S
BDD-2022S BDD-2122S BDD-2222S BDD-2322S BDD-2422S BDD-2522S
BDD-3022S BDD-3122S BDD-3222S BDD-3322S BDD-3422S BDD-3522S
BDD-1003S BDD-1103S BDD-1203S BDD-1303S BDD-1403S BDD-1503S
BDD-2003S BDD-2103S BDD-2203S BDD-2303S BDD-2403S BDD-2503S
BDD-3003S BDD-3103S BDD-3203S BDD-3303S BDD-3403S BDD-3503S
BDD-1013S BDD-1113S BDD-1213S BDD-1313S BDD-1413S BDD-1513S
BDD-2013S BDD-2113S BDD-2213S BDD-2313S BDD-2413S BDD-2513S
BDD-3013S BDD-3110S BDD-3213S BDD-3313S BDD-3413S BDD-3513S
BDD-1023S BDD-1123S BDD-1223S BDD-1323S BDD-1423S BDD-1523S

　　 如果鐵心綁扎足夠緊實及繞組輻向撐條有效支撐，并且輻向電動力沿圓周方向均布的話，這種變形是對稱的，整個繞組為多邊星形，然而，由于鐵芯受壓變形，撐條受支撐情況不相同，沿繞組圓周受力是不均勻的，實際上常常發(fā)生局部失穩(wěn)形成曲翹變形�！　〈蠹蚁瓤赐娧訒r時間繼電器的觸點的圖形符 ：斷電延時時間繼電器的觸點也是看圓弧，通電后觸點動作。斷電后，圓弧向圓心方向移動，帶動觸點延時復位。其實在繼電器中，有些時間繼電器還帶有瞬時動作觸點，這些觸點跟常用繼電器觸點一樣，功能都差不多的通電動作，斷電恢復原始狀態(tài)。

BDD-2023S BDD-2123S BDD-2223S BDD-2323S BDD-2423S BDD-2523S
BDD-3023S BDD-3123S BDD-3223S BDD-3323S BDD-3423S BDD-3523S
BDD-1004S BDD-1104S BDD-1204S BDD-1304S BDD-1404S BDD-1504S
BDD-2004S BDD-2104S BDD-2204S BDD-2304S BDD-2404S BDD-2504S
BDD-3004S BDD-3104S BDD-3204S BDD-3304S BDD-3404S BDD-3504S
BDD-1014S BDD-1114S BDD-1214S BDD-1314S BDD-1414S BDD-1514S
BDD-2014S BDD-2114S BDD-2214S BDD-2314S BDD-2414S BDD-2514S
BDD-3014S BDD-3110S BDD-3214S BDD-3314S BDD-3414S BDD-3514S
BDD-1024S BDD-1124S BDD-1224S BDD-1324S BDD-1424S BDD-1524S
BDD-2024S BDD-2124S BDD-2224S BDD-2324S BDD-2424S BDD-2524S
BDD-3024S BDD-3124S BDD-3224S BDD-3324S BDD-3424S BDD-3524S

 　　當然如果電流較小，比如在1A附近的時候，反電動勢會造成電弧放電，放電會導致金屬氧化物污染觸點，導致觸點失效，電阻變大。這里要提一下，繼電器始終是會失效的，我們做保護，主要是希望延長繼電器的使用時間，因為觸點始終會積碳，老化，其表面不如初那樣清潔。