公开(公告)号：US4906935A

公开(公告)日：1990-03-06

申请号：US251692

申请日：1988-09-29

申请人： Ruediger Hess ,  Wilfried Kuhl ,  Leonhard Klug ,  Wolfgang Schilling ,  Peter Trentin ,  Heribert Weber ,  Wolfgang Schlenk ,  Heinz-Helmut Schramm

发明人： Ruediger Hess ,  Wilfried Kuhl ,  Leonhard Klug ,  Wolfgang Schilling ,  Peter Trentin ,  Heribert Weber ,  Wolfgang Schlenk ,  Heinz-Helmut Schramm

IPC分类号： H01H33/66 ,  H01H33/668

CPC分类号： H01H33/668

摘要： To check the presence of operating vacuum in vacuum switches, high voltage can be applied between the contacts at a given contact spacing and the dielectric strength can be tested. According to the invention, the procedure for vacuum monitoring is that a contact spacing (h) below the nominal stroke of the vacuum switch is selected and that the X-radiation generated at this contact spacing (h) and high voltage (U) in vacuum due to the field electron emission between the contacts by the contact surfaces acting as anode is acquired and evaluated as proof of the presence of operating vacuum inside the switching tube. This method can preferably be applied to encapsulated vacuum switching tubes, in particular to SF.sub.6 -insulated switching facilities. Associated with the vacuum switching tube (15) in the associated equipment is an X-ray detector, preferably a Geiger-Muller counter, which is connected to the high-voltage unit (25) via an evaluating circuit (30 to 50) which serves for the determination and indication of the operating vacuum and shuts off the high-voltage unit (25) to minimize the X-ray dose. Due to the X-ray emission, which is stopped long before reaching impermissible values, the presence of vacuum can be positively verified.

摘要翻译： 为了检查在真空开关中是否存在操作真空，可以以给定的接触间距在触点之间施加高电压，并且可以测试介电强度。 根据本发明，真空监测的过程是选择低于真空开关的额定行程的接触间距（h），并且在该接触间隔（h）和真空中的高电压（U）下产生的X射线 由于作为阳极的接触表面的触点之间的场电子发射被获取并被评估为开关管内存在操作真空的证明。 该方法可以优选地应用于封装的真空开关管，特别是SF6绝缘开关设备。 与相关设备中的真空开关管（15）相关联的是X射线检测器，优选Geiger-Muller计数器，其通过评估电路（30至50）连接到高压单元（25） 用于确定和指示操作真空并关闭高压单元（25）以最小化X射线剂量。 由于在达到不允许值之前停止的X射线发射，可以肯定地验证真空的存在。