1摁启动开关后电动葫芦部工作 1 after press the start switch electric hoist department 主要是因电葫芦没接通额定工作电压，而无法工作，一般有3 种情况： Mainly for electric hoist not connected to the rated working voltage, and unable to work, there are three general conditions: ①供电系统是否对电动电葫芦电源送电，一般用试电笔测试，如没送电，等送电后再工作； (1) whether the power supply system for electric hoist electric power transmission, generally use test pencil test, such as not sending, such as sending again after work; ②电葫芦主、控回路的电器损坏、线路断开或接触不良，也会使电葫芦电机无法通电，出现这种情况，需检修主、控回路，检修时，为了防止主、控回路送给三相电机的电源缺相而烧毁电机，或电葫芦电机突然得电运转，产生危害，一定要将电葫芦电机从电源线路上断开，只给主、控回路送电，然后点动起动和停止开关，检查分析控制电器及线路的工作情况，对有问题的电器或线路进行修复或更换，当确认主、控回路无故障，方可重新试车； (2) electric hoist, Lord control loop of electrical appliances, circuit disconnection or poor contact, also can make the electric hoist motor can't electricity, appear this kind of circumstance, need to repair the main, control circuit, maintenance and repair, in order to prevent the main and control circuits to three-phase motor power phase and burned, or electric hoist motor electric operation, suddenly, must will be electric hoist motor from the power cord to disconnect on the road, only to master and control circuit of electric transmission, then click start and stop switch, check the analysis and control electric circuit working condition, to have a problem electrical equipment or lines for repair or replacement, when confirm the master and control circuit of trouble-free, to reset test; ③电葫芦电机端电压比额定电压低10%以上，电机起动转矩过小，使电葫芦起吊不动货物，而无法工作，检查时，用万用表或电压表等测量电机输入端电压，确因电压过低，使电机无法起动时，需等系统电压恢复正常后再使用电葫芦。有时，电葫芦电机的电压正常，而电葫芦就是不工作，这需考虑其他原因，例如：电机被烧毁，检修时需更换电机；电葫芦长期不用，保养不善等原因使制动轮与端盖锈死，起动时制动轮脱不开，电机只发出“哼”的响声，转动不起来，电葫芦不能工作。这时，应卸下制动轮，清洗锈蚀表面，然后重新试车；电机严重扫膛，也会使电机不转动，发现这种情况，应停止使用，必须进行大修或更换电机，以保证电葫芦正常工作。另外，生产中严禁超载使用电动电葫芦，当货物过度超载，电葫芦吊不动货物，电机仅发出“哼”的响声，而不运转，严重时会烧毁电机，甚至引发事故，这时应立即停机，减轻货物，使电葫芦在额定功率下工作。 (3) than the rated voltage of the electric hoist motor power down more than 10%, motor starting torque is too small, make the electric hoist lifting goods, and unable to work, check the input voltage of motor is measured with a multimeter or a voltmeter, etc, because of the voltage is too low, truly make motor can't start, shall system voltage return to normal before the use of electric hoist. Sometimes, electric hoist motor voltage is normal, and the electric hoist is not working, it should be considered for other reasons, such as: motor burned, need to change the motor maintenance; Electric hoist long-term need not, poor maintenance of brake wheel and the end cover rust, brake wheel does not open, when starting motor only "hum" sound, turn up, the electric hoist can't work. At this time, should remove brake wheel, cleaning rust on the surface, and test again; Serious motor chamber, also can make the motor does not rotate, found that this kind of situation, should stop to use, must be for repair or replacement motor, in order to ensure the normal work of electric hoist. In addition, in the production of forbidden use electric electric hoist overload, when the goods excessive overload, electric hoist crane didn't move the goods, the motor only thrum "hum", instead of running, serious when burning motor, or even cause an accident, should immediately stop at this moment, to reduce the goods, make the electric hoist work under rated power.