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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
如選上一個規(guī)格50毫安太大會不起作用。選用漏電開關(guān)的額定動作時間是0·4s。二、15千瓦的支路用開關(guān)的選擇：設(shè)為空調(diào)三個支路、照明二個支路。廚衛(wèi)支路。衛(wèi)浴支路?？照{(diào)分三支路。選用2極2p型開關(guān)。每一支路的開關(guān)的額定電流是20A?！ ∵@是因為三相異步電動機(jī)的啟動電流很大(全壓啟動時的啟動電流能達(dá)到額定電流的4~7倍)，若用熔斷器作過載保護(hù)，則選擇熔斷器的額定電流就應(yīng)等于或略大于電動機(jī)的額定電流，這樣電動機(jī)在啟動時，由于啟動電流大大超過了熔斷器的額定電流，使熔斷器在很短的時間內(nèi)爆斷，造成電動機(jī)無法啟動。
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
在相同一次額定電流、相同額定輸出容量的情況下，電流互感器二次電流采用1A或5A，其結(jié)構(gòu)和特性有較大的不同。采用1A比采用5A，其結(jié)構(gòu)和特性有較大的不同。采用1A比采用5A的電流互感器匝數(shù)比大5倍，二次繞組匝數(shù)大5倍，開路電壓高，內(nèi)阻大，勵磁電流小，制造的難度大，價格略高。
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
厚膜鉑熱電阻是20世紀(jì)70年代發(fā)展起來的溫度傳感器，采用了厚膜印刷工藝取代線繞電阻體、手工電阻值的工藝。儀表在本文介紹厚膜鉑熱電阻技術(shù)指標(biāo)、特性及應(yīng)用。1、特性與技術(shù)指標(biāo)厚膜鉑熱電阻主要特性與薄膜鉑熱電阻基本相同，產(chǎn)厚膜鉑熱電阻的結(jié)構(gòu)見圖1-圖4，其技術(shù)指標(biāo)見表1。 其主要用于遠(yuǎn)距離接通和分?jǐn)?80伏以下的交流電路，開斷和控制電路，一般交流器主要利用主接點來開閉電路，用輔助接點來執(zhí)行控制指令，主接點一般只有常開接點，而輔助接點常有兩對具有常開和常閉功能的接點，小型的器也經(jīng)常作為中間繼電器配合主電路使用。
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
采用鋁合金振膜、玻璃纖維振膜的低音單元一般口徑比較小，承受功率比較大，而采用強(qiáng)化紙盆、玻璃纖維振膜的低音單元重播音樂時的音色較準(zhǔn)確，整體平衡度不錯。Q0： 揚聲器單元的品質(zhì)因數(shù)是設(shè)計和和制作音箱前必須了解的一個很重要的參數(shù)。 它工作使用一微型變壓器降壓，初級輸入電源為AC交流220Ⅴ，次級有二組電源AC18ⅤAC12Ⅴ，AC18V經(jīng)橋式整流二極管（1N4001×4），C1（30uf/32V）濾波后，為kA微型繼電器、復(fù)合三極管ⅤT1ⅤT2（9012）提供直流DC工作電源。
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
(2)電荷的守恒性;在一個孤立系統(tǒng)中，系統(tǒng)所具有的正負(fù)電荷的電量的代數(shù)和總保持不變。這一性質(zhì)稱為電荷守恒定律(3)電荷的相對論不:一個電荷，其電量與它的運動速度或加速度均無關(guān)。這是電荷與質(zhì)量的不同之處。電荷的這一性質(zhì)表明系統(tǒng)所帶電荷的電量與參考系無關(guān)，即具有相對論不。
對洞口采用減光方案，可以有效降低照明能耗，新舊標(biāo)準(zhǔn)對此都進(jìn)行了規(guī)定。同時，新標(biāo)準(zhǔn)還對照明白晝和夜間照明的調(diào)光方案進(jìn)行了規(guī)定。照明控制設(shè)計原則主要規(guī)定了照明控制方式應(yīng)以智能控制或自動控制為主，并針對突發(fā)狀況和異常工況，規(guī)定內(nèi)進(jìn)行養(yǎng)護(hù)維修作業(yè)時、發(fā)生交通事故、火災(zāi)或進(jìn)行交通管制時，內(nèi)所有照明燈具宜開啟到狀態(tài)?！ ∷俣壤^電器是當(dāng)轉(zhuǎn)速達(dá)到規(guī)定值時觸頭動作的繼電器。主要用于電動機(jī)反接制動控制電路中，當(dāng)反接制動的轉(zhuǎn)速下降到接近零時能自動地及時切斷電源。速度繼電器的結(jié)構(gòu)和工作原理如下所示轉(zhuǎn)子是一塊固定在軸上的永久磁鐵。浮動的定子與轉(zhuǎn)子同心，而且能獨自偏擺，定子由硅鋼片疊成，并裝有籠型繞組。
