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描述了电流真有效值的意义及计算方法,介绍了普通数字电流表的测量原理及缺点,比较了真有效值电流表及谐波分析仪在电气防火检测中的不同作用。
The significance and calculation method of true rms current are described. The measuring principle and disadvantage of ordinary digital ammeter are introduced. The different roles of rms ammeter and harmonic analyzer in electrical fire detection are compared.