公开(公告)号：US3697709A

公开(公告)日：1972-10-10

申请号：US3697709D

申请日：1971-12-20

申请人： AUTOMATIC SWITCH CO

发明人： WITKOR DOMINIK M

IPC分类号： H01H33/62 ,  H01H9/54 ,  H01H31/28 ,  H01H33/52 ,  H01H31/00

CPC分类号： H01H33/52 ,  H01H31/28 ,  H01H2300/018

摘要： A switch including three conductors for connection, respectively, to a normal power source, an emergency power source, and a load, as well as three conductors for connection to an automatic transfer switch. An isolating switch contact is located between each power source conductor and one of the transfer switch conductors, and a bypass contact is located between the load conductor and the third transfer switch conductor. Manually operable control means are provided for opening and closing the isolating switch contacts, and for positioning the bypass contact so that it engages either its respective transfer switch conductor or one of the power source conductors. An interlock forming part of the control means prevents opening of the isolating switch contacts unless the bypass contact is engaging one of the power source conductors. The interlock also prevents disengagement of the bypass contact from either power source conductor unless the isolating contacts are closed. The control means also includes means defining only a limited number of stable positions of the bypass contact.

摘要翻译： 分别包括用于连接到正常电源，应急电源和负载的三个导体以及用于连接到自动转换开关的三个导体的开关。 隔离开关触点位于每个电源导体和转换开关导体之一之间，旁路触点位于负载导体和第三转换开关导体之间。 提供手动操作的控制装置，用于打开和关闭隔离开关触点，并且用于定位旁路触点，使得它接合其各自的转换开关导体或电源导体中的一个。 形成控制装置的一部分的联锁件防止隔离开关触点的打开，除非旁路触头接合电源导体中的一个。 互锁还防止旁路触点与任一电源导体分离，除非隔离触点闭合。 控制装置还包括限定旁路接触件的有限数量的稳定位置的装置。