新购置的电动机在使用之前应进行下列检查:一、运行前的检查1.首先检查电机的绝缘电阻,一般常用摇表来测量。电机的绝缘电阻是在绕组和电机外壳之间、互相绝缘的各部分和不同相绕组之间进行测量(如图)。将摇表摇到每分钟120～130转,观察其读数。中小型电机的绝缘电阻不得小于0.5兆欧,电阻低于0.5兆欧时,必须待其干燥后才能使用。 The newly purchased motor should be checked before use: First, check before running 1. First check the insulation resistance of the motor, commonly used shake table to measure. The insulation resistance of the motor is measured between the winding and the motor housing, between the parts insulated from each other and between the different phase windings (see picture). The shake table to 120 to 130 minutes per minute, observe the readings. Small and medium-sized motor insulation resistance of not less than 0.5 Megohms, resistance less than 0.5 Megohms, it must be dried before use.