This paper simply discussed the meaning of motor,analyzed the adverse consequences produced by error motor protection design,and discussed the motor start kinds,introduced the advantages and disadvantages of each start type,at the same time,given the protection measures of low voltage motor,for reference.%简述了电动机的含义，分析了电动机保护设计有误时会产生的不良后果，并对电动机的启动种类进行了论述，介绍了各启动类型的优缺点，同时给出了低压电动机的保护措施，以供参考。
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