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在近代出产的大中型X线机中,以基层广泛使用的XG—500毫安X线机为例,在高压初级的控制上都采用耐高压,允许通过较大电流的高压可控硅(型号kp…200A/1.5kv)取代老式机中的高压继电器,可控硅以其独有的零相合闸时接通高压初级,既无突波电涌、也无触点火花,性能可靠经久耐用,极少发生故障。我们两院购进该机以来,十多年只发生过三次故障,开始时因我们经验不多,遇此类故障不知从哪下手检修。为使同道
In large and medium-sized X-ray machines produced in recent times, the XG-500 mAh X-ray machine widely used in the grass-roots level is used as an example. The high-voltage primary control uses high-pressure resistance, allowing high-voltage thyristors (models) to pass a large current. Kp...200A/1.5kv) instead of the high voltage relay in the old machine, the thyristor turns on the high pressure primary with its unique zero phase closing, neither surge surge nor contact spark, the performance is reliable and durable. Minimal failure. Since our two hospitals purchased this machine, there have only been three breakdowns in more than ten years. We have not experienced much at the beginning, and I do not know where to start repairing in the event of such a breakdown. For the same way