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11. 发明授权

US5323289A Lightning protection for field mounted instruments 失效
标题翻译：现场安装仪表防雷
公开(公告)号：US5323289A
公开(公告)日：1994-06-21
申请号：US960269
申请日：1992-10-13
申请人： Randy J. Longsdorf , Richard L. Nelson
发明人： Randy J. Longsdorf , Richard L. Nelson
IPC分类号： H02H9/06 , H02H1/04 , H02H3/22
CPC分类号： H02H9/06
摘要： A protection circuit is provided for protecting sensitive electrical field instruments from a transient voltage strike and for ensuring that the instruments will meet safety approval during high potential voltage testing. The first and second wires of a two-wire circuit are connected to a first and second terminal respectively. A first surge arrestor electrically couples a first path between the first and second terminal. An impedance and a transient suppressor are connected in series and electrically couple a second path between the first and second terminal. The second path is coupled in parallel with the first path between the first and second terminal and is coupled closer to the internal components of the electrical instruments to be protected than is the first path. A second surge arrestor is electrically coupled between the second terminal and ground, and has a higher voltage breakdown potential than the first surge arrestor.
摘要翻译：提供了一种保护电路，用于保护敏感电场仪器免受瞬态电压冲击，并确保仪器在高电压电压测试期间将符合安全认证。两线电路的第一和第二线分别连接到第一和第二端子。第一浪涌抑制器电耦合第一和第二端子之间的第一路径。阻抗和瞬态抑制器串联连接并且电耦合第一和第二端子之间的第二路径。第二路径与第一和第二端子之间的第一路径并联耦合，并且比第一路径更靠近待保护的电气设备的内部部件耦合。第二电涌放电器电耦合在第二端子和地之间，并且具有比第一电涌放电器更高的电压击穿电位。

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