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10秒装修报价 装修要花多少钱?获得精准报价,省钱30%
168211
元
材料费:77201元
人工费:86544元
设计费:1760元
质检费:2706元
一般是80元左右,利用金属导体作为熔体串联于电路中,当过载或短路电流通过熔体时,因其自身发热而熔断,从而分断电路的一种电器。熔断器结构简单,使用方便,广泛用于电力系统、各种电工设备和家用电器中作为保护器件。熔断器主要由熔体、外壳和支座3部分组成,其中熔体是控制熔断特性的关键元件。熔体的材料、尺寸和形状决定了熔断特性。熔体材料分为低熔点和高熔点两类。低熔点材料如铅和铅合金,其熔点低容易熔断,由于其电阻率较大,故制成熔体的截面尺寸较大,熔断时产生的金属蒸气较多,只适用于低分断能力的熔断器。高熔点材料如铜、银,其熔点高,不容易熔断,但由于其电阻率较低,可制成比低熔点熔体较小的截面尺寸,熔断时产生的金属蒸气少,适用于高分断能力的熔断器。熔体的形状分为丝状和带状两种。改变变截面的形状可显著改变熔断器的熔断特性。熔断器有各种不同的熔断特性曲线,可以适用于不同类型保护对象的需要。
¥460.00 正品熔断器式隔离开关*熔开关XLP1 250A 3P不带熔芯¥54.00 HR6-160/310熔断器式隔离含铜芯片*开关 可选择带开合信号装置型¥185.00 HR3-100/32 熔断器隔离开关 100A 三相隔离开关 *开关带熔断器
一般是100元左右一个。主要技术参数3.1 额定绝缘电压:690V。3.2 额定工作电压:380V、660两种。3.3 额定工作电流:380V:100A、200A、400A、630A四种;660V:100A、200A、315A、425A四种。3.4 开关的接通与分断能力与额定熔断短路电流见表1。3.5 开关的机械寿命分别为3000次(100A、200A)和1000次(400A、630A)。3.6 开关的电寿命分别为600次(100A、200A)和200次(400A、630A)接通与分断条件按表2。3.7 辅助开关(LX19K)的额定工作电压交流380V,额定发热电流6A,额定控制容量300VA。