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(一) 《给水排水》1983年第六期44～45页刊登了武军同志《离心泵给排水简易自控装置》一文。我们发现该文接线有原理性的错误。按原接线图热继电器失去作用;即在热继电器动作后,一定耍按动停机按钮才能停泵;或者在水池水位已经下降到低水位以下后, 3～4接点断开时,水泵仍在运转,仍需按动停机按钮。原文接线图见图1。
(1) “Water Supply and Drainage,” 1983, sixth issue, pages 44 to 45, published an article by Comrade Wu Jun of the “Easy Automatic Control Device for Water Supply and Drainage of Centrifugal Pumps”. We found that the wiring has a principle error. According to the original wiring diagram, the thermal relay loses its function; that is, after the thermal relay is actuated, the stop button must be pressed to stop the pump; or after the water level of the pool has fallen below the low water level, the water pump is still running when the 3 to 4 contacts are disconnected. , still need to press the stop button. The original wiring diagram is shown in Figure 1.