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公开(公告)号：US3721862A
公开(公告)日：1973-03-20
申请号：US3721862D
申请日：1971-08-30
摘要： A ground fault detecting system including a current monitor, a ground fault sensor and a circuit breaker. The ground fault sensor responds to the presence of ground fault current to actuate a circuit breaker to open the circuit in which the ground fault current is flowing. The ground fault sensor includes circuit elements which perform corresponding circuit functions such as time delay and reset. The ground fault sensor is adapted to provide an adjustable or variable time delay so that the circuit breaker to be tripped may be delayed in tripping through a wide range of time periods after the initial sensing of the ground fault current.
摘要翻译： 一种接地故障检测系统，包括电流监测器，接地故障传感器和断路器。 接地故障传感器响应接地故障电流的存在来启动断路器以打开接地故障电流流过的电路。 接地故障传感器包括执行相应电路功能（如延时和复位）的电路元件。 接地故障传感器适于提供可调节或可变的时间延迟，以便在初始感测接地故障电流之后的较宽范围的时间段内，跳闸的断路器可能被延迟跳闸。
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2.发明授权Off delay timer and internally generated auxiliary direct current voltage source for a controlled rectifier alternating current switch for use therein 失效关闭延迟定时器和内部生成的辅助直流电源，用于控制整流器替代使用的电流开关
公开(公告)号：US3711761A
公开(公告)日：1973-01-16
申请号：US3711761D
申请日：1970-08-13
发明人： WATSON G
IPC分类号： H03K17/292 , H02M7/20
CPC分类号： H03K17/292
摘要： An alternating current switch includes a full-wave rectifier with one input terminal thereof connected to an alternating current line, and the other input terminal connected by way of a load impedance to the alternating current line, with a controlled rectifier connected across the output of the full wave rectifier and while conducting providing for the flow of current through the load impedance and while nonconducting preventing the flow of current through the load impedance, with a Zener diode connecting the control element of the controlled rectifier to the anode thereof whereby a gate drive for gating the controlled rectifier on is obtained only when the voltage across the Zener diode is sufficient to cause the Zener diode to become conductive.
摘要翻译： 交流电开关包括全波整流器，其一个输入端连接到交流电源线，另一个输入端通过负载阻抗连接到交流电源线，可控整流器连接在交流电源的输出端 全波整流器，并且在通过负载阻抗提供电流流动的同时，并且在不导电的情况下，通过将可控整流器的控制元件连接到其阳极的齐纳二极管，从而防止电流流过负载阻抗，由此栅极驱动器用于 只有当齐纳二极管两端的电压足以使齐纳二极管变得导通时，才能获得控制整流器的门控。
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