1C31166G01
1C31166G01
示出了自动扶梯基本的功能连线,将自动扶梯上、下两端的光敏接收信号并联接到时间继电器,再利用时间继电器定时器延时,将接收到的光敏信号下降沿延时,延时时间为(t0+t1+t2),通过将 X2 端子接为有效状态,实现低速运行。X4 端子有效时,可以使扶梯运行于检修频率,一般为额定运行速度的 50%。X5为急停按钮,应对于故障状态或一些突发事件的停机控制。
变频器的起停及方向控制,采用两线式运转模式;变频器的故障输出可以用于报警等指示,采用变频器的运行中信号输出作抱闸信号,这两者都是通过继电 器输出,触点常开或常闭形式可根据实际需要进行更改。
四、节能与优点
1 节电
设备安装调试一次开车成功,运行平稳、节能效果明显。改造前工频运行时每部扶梯每天耗电高达 80 度左右,变频改造后由原来的全速运行变为有人时全速运行,运行频率 50Hz,无人时低速爬行,运行频率 15Hz,其每天用电 28 度左右度,大大降低了能耗,其节电率为65%。
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