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通常,电工在对设备进行维护保养时,必须要掌握一定的电工理论和积累一定的实际经验才能做好这项工作,下面的电工实用的小窍门,或许对此是十分有益的。一、电动机电流的估算对于工厂里大量使用的380V三相交流异步电动机,当只知道其功率而要选择导线、开关等电器时,一般以其功率的2倍来估算电流是留有一定余量且又较为准确的。例如:1台15kW的电动机,估算电流为30A,其铭牌上的标明电流为29A。因此是可行的。
Usually, when the electricians maintain their equipment, they must master certain theories of electrical engineering and accumulate some practical experience to do this work. The following practical tips for electricians may be very helpful. First, the motor current estimation For the large-scale use of the factory 380V three-phase AC induction motor, when only know the power to select the wires, switches and other electrical appliances, the general estimate of its power 2 times the current is left with a margin And more accurate. For example: a 15kW motor, the estimated current of 30A, the nameplate on the indicated current of 29A. So it is feasible.