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90kW以上的JJ1系列自耦减压启动柜主接触器线圈上串联了一个停止按钮的常闭触点,使其具备了节能、无声的功效,即减少了噪音,节省了能量。但在应用LB(N)Z系列操作柱现场控制电机时,增加了困难,LB(N)Z系列操作柱在爆炸危险及防水场所中,不容易对具有两个常闭触点的停止按钮实现控制。通过对JJ1B-200/380-2型自耦减压启动柜电气原理图的分析,为满足LB(N)Z系列操作柱的组合要求,若取消另一个常闭触点,按下停止按钮,主接触器线圈的释放时间可近似计算得出,该时间小于人扳把旋钮的意识滞留时间,整个系统运行正常,因此可以取消该常闭触点,完善设备的功能。
Over 90kW JJ1 series auto decompression starter cabinet main contactor coil connected in series with a stop button normally closed contacts, it has the energy saving, silent effect, which reduces noise and saves energy. However, difficulties are encountered when applying LB (N) Z Series column control motors in the field, and the LB (N) Z series operating column is not easily accessible with a stop button with two normally closed contacts in an explosion hazard and waterproof location control. Through the analysis of the electrical schematic diagram of JJ1B-200 / 380-2 auto decompression starter cabinet, in order to meet the combination requirements of LB (N) Z series operating column, if the other normally closed contact is canceled, press the stop button, The release time of the main contactor coil can be approximately calculated, which is less than the awareness retention time of the human pull knob, and the entire system is operating normally. Therefore, the normally closed contact can be canceled and the function of the equipment can be perfected.