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在使用电动绞车进行水文测量时,为了保证测点垂线位置和测深的精度,一般采取机械或电气制动装置来克服电动绞车的惯性,不论何种装置均需添置一定的设备或电气元件,有时因受场地限制及其他一些原因不宜添置设备,为了适应这种情况,我们利用交流接触器二组常闭触点,在不增添元件情况实现制动,取得了较好效果。制动线路如下图。
In the use of electric winch for hydrological measurements, in order to ensure the vertical position of the measuring point and sounding accuracy, the general mechanical or electrical braking device to overcome the inertia of the electric winch, no matter what device are required to purchase certain equipment or electrical components , Sometimes due to site constraints and other reasons should not be purchased equipment, in order to adapt to this situation, we use the AC contactor two sets of normally closed contacts, without adding components to achieve braking, and achieved good results. Braking circuit as shown below.