1、概述      该断路器额定电压800V，适用于交流50Hz或60Hz，额定工作电压至690V，额定工作电流至800A的配电网络电路中，用来分配电能和保护线路及电源设备免受过载、短路、欠电压等故障的损坏。同时也能作为电动机得不频繁起动及过载、短路、欠电压保护。 该断路器具有体积小、分段高、飞狐短等特点，是用户使用的理想产品。 此断路器可垂直安装（既竖立），亦可水平安装（横装）。 本产品符合IEC947-2、GB14048.2等标准。1、The range     These series moulded case circuit breaker,is applicable circuit of AC 50Hz(or60Hz),rated insulation Voltage 690V, rated operating Voltage up to 660V,rated operating voltage up to 250V(DC).The rated operating current 3A-800A.For distribute energy of electricity and infrequent making and breaking circuit, and infrequent starting of motor(rated operating current up to 400A)at normal condition they are provided with the function of the protection against overload and short-circuit and undervoltage.       The moulded case circuit breaker comply with standard of IEC947-2, GB14048.2 and so on. 2、适用工作环境及安装条件? 海拔高度2000m以下；? 周围介质温度不高于+40℃（对船用产品为+45℃）和不低于-5℃； ? 能耐受潮湿空气的影响；? 能耐受烟雾、油雾的影响；? 能耐受霉菌的影响；? 能耐受核辐射的影响； ? 最大倾斜度为22.5°； ? 在受到船舶正常振动时能可靠工作；? 在收到地震情况下（4g）能可靠工作； ? 在无爆炸危险的介质中，具介质无足以腐蚀金属和破坏绝缘的气体与导电尘埃的地方；? 在没有雨雪侵袭的地方。 2、Suitable working environment and installation condition ? Altitude less than 2000m;? Ambient medium temperature is from -5℃to+40℃(+45℃ for shipping product);? Can withstand moist air;? Can withstand Salt fog and oil fog;? Can withstand mold;? Can withstand unclear radiation;? Max inclination is 22.5°;? It can still work reliably if the product subjects to the normal vibration form ships;? It can still work reliably if the product subjects to the earthquake(4g);? Put in the place where is no explosion danger and conductive dust, cant corrode motel and destroy the insulating gas;? Put in the place where is no sleet