一、適用范圍 HR3熔斷器式刀開關(guān)用于交流50Hz，額定工作電壓380V，額定電流100A-1000A的配電系統(tǒng)中作為短路保護和電纜、導(dǎo)線的過載保護之用。在正常情況下， 可供不頻繁的手動接通和分?jǐn)嗾Ｘ撦d電流與過載電流，在短路情況下，由熔體熔斷來切斷電流。 二、型號及含義 1表示正面?zhèn)确礁軛U機構(gòu)式，前檢修；2表示正面中央杠桿傳動機構(gòu)式，后檢修；3表示側(cè)面操作手柄式，前檢修；4表示無面板正面?zhèn)确礁軛U傳動機構(gòu)式，前檢修； 極數(shù)：3極 額定電流（A) HR熔斷式刀開關(guān) 三、主要技術(shù)參數(shù) 型號 額定工作電壓（ue）V 額定絕緣電壓(ui)V 額定工作電流 le(A) 約定發(fā)熱電流（ith）A 配用熔斷體 HR3-100 100 100 RTO-100 HR3-200 200 200 RTO-200 HR3-400 380 660 400 400 RTO-400 HR3-600 600 600 RTO-600 HR3-1000 1000 1000 RTO-1000 The direct HR3 knife switch, www.shyosdy.com A, scope of application HR3 fuse knife switch for AC 50Hz, rated voltage 380V, rated current overload protection in distribution system 100A-1000A as short circuit protection, wire and cable for. In normal circumstances, Manual switch for less frequent and breaking the normal load current and overload current, in case of a short circuit, by fusing to cut off the current. Two, models and implications 1 represents the positive side lever mechanism, pre maintenance; 2 said that the frontal central lever driving mechanism, after the repair; 3 said the side handle type, pre maintenance; 4 indicates no front panel lateral lever driving mechanism, pre maintenance; Pole number: 3 Rated current (A) HR fuse knife switch Three, the main technical parameters Rated working voltage (UE) V rated insulation voltage (UI) V rated working current Le (A) resistive current (ITH) A with fuse HR3-100 100100 RTO-100 HR3-200 200200 RTO-200 HR3-400 380660400400 RTO-400 HR3-600 600600 RTO-600 HR3-1000 10001000 RTO-1000