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近几年来已有部分生产厂把FT81型三联调节器的30欧电阻取消了,而一些厂却仍一直保留着。显然存在两种不同的意见。这里就这个问题谈谈自己的看法,以求统一认识。首先让我们看看,用同一上海产FT81型调节器做试验拍摄的,限流器工作时接和不接30欧电阻,限流器触点电压波形(见图1)。上面一条是按原线路接有30欧电阻的,触点振动频率高达280赫,触点断开时间1毫秒,触点间电压也较低;下面一条为去掉30
In recent years, some production plants have canceled the 30-ohm resistor of the FT81-type triple regulator, while some factories still keep it. There are obviously two different opinions. Here to talk about his own views on this issue in order to unify their understanding. First let us see, with the same Shanghai FT81-type regulator to do the test shot, the current limiter work with and without access to 30 ohm resistor, the limiter contact voltage waveform (see Figure 1). The above one is connected to the original line with a 30 ohm resistor, the contact vibration frequency up to 280 Hz, the contact off time 1 ms, the voltage between contacts is lower; the following one to remove 30