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一、低壓斷路器的工作原理；低壓斷路器又稱自動開關(guān)，它是一種既有手動開關(guān)作用，又能自動進行失壓、欠壓、過載、和短路保護的電器。它可用來分配電能，不頻繁地啟動異步電動機，對電源線路及電動機等實行保護，當它們發(fā)生嚴重的過載或者短路及欠壓等故障時能自動切斷電路。 

二、LS低壓斷路器選擇

三、低壓斷路器符號，LS低壓斷路器選型: 

經(jīng)濟型ABE52b,ABE804b 

標準型ABS33b,ABS1203 

高分斷型ABH103b,ABH404b 

限流型：ABL402b,ABL804b 

馬達保護型：ABE53bM,ABS33bM,ABH53bM 

四、LS低壓斷路器規(guī)格：從極數(shù)分2極、3極、4極；額定電流從5A、10A*大到1200A; 

五、低壓斷路器特點： 

1、設(shè)計著眼于基本功能，經(jīng)濟適用 

2、觸點采用銀合金材料 

3、產(chǎn)品分類詳細，想客戶所想 

4、產(chǎn)品附件齊全 

5、外殼采用高絕緣、高阻燃、高強度工程塑料制成。 

六、LS低壓斷路器參數(shù): 

產(chǎn)  品 型  號 分斷能力lcu KA/AC380V 額 定 電 流In          極  數(shù) 

ABE52b        7.5                 5,10,15,20,30,40,50A                      2P 

ABE53b                                                                       3P 

ABE62b         7.5                     60A                                   2P 

ABE63b                                                                       3P 

ABE102b      14                5,10,15,20,30,40,50,60,75,100A               2P 

ABE103b                                                                   3P 

ABE104b                                                                   4P 

ABE202b      18                100,125,150,175,200,225A                   2P 

ABE203b                                                                  3P 

ABE204b                                                                  4P 

ABE402b      30                   250,300,350,400A                       2P 

ABE403b                                                                  3P 

ABE404b                                                                  4P 

ABE602b      42                         500,600A                        2P 

ABE603b                                                                  3P 

ABE604b                                                                  4P 

ABE802b       42                       700,800A                          2P 

ABE803b                                                                  3P 

ABE804b                                                                  4P 

AB系列  （標準型） 

ABS32b           7.5                  5,10,15,20,30A                      2P 

ABS33b                                                                     3P 

ABS52b            14              5,10,15,20,30,40,50A                     2P 

ABS53b                                                                     3P 

ABS54b                                                                     4P 

ABS62b            14                      60A                              2P 

ABS63b                                                                     3P 

ABS64b                                                                     4P 

ABS102b          25      5,10,15,20,30,40,50,60,75,100A                    2P 

ABS103b                                                                    3P 

ABS104b                                                                    4P 

ABS202b             25         100,125,150,175,200,225A                    2P 

ABS203b                                                                    3P 

ABS204b                                                                    4P 

ABS402b             42             250,300,350,400A                        2P 

ABS403b                                                                    3P 

ABS404b                                                                    4P 

ABS602b             65                 500,600A                            2P 

ABS603b                                                                    3P 

ABS604b                                                                    4P 

ABS802b              65                   700,800A                         2P 

ABS803b                                                                    3P 

ABS804b                                                                    4P 

ABS1003              65                      1000A                         3P 

ABS1004                                                                    4P 

ABS1203             65                      1200A                          3P 

ABS1204                                                                    4P