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公开(公告)号：EP1155487B1
公开(公告)日：2008-08-27
申请号：EP00902533.9
申请日：2000-01-24
申请人： Lam, Sheirchun
发明人： Lam, Sheirchun
摘要： A circuit breaker (10) for use in a power/load circuit formed by a three-phase AC power supply (11) and a load (12) connected to the power supply (11) by means of three live power lines (R-R', S-S' & T-T'). The circuit breaker (10) comprises a tripping circuit (60) including switches (SW1) connected in series with the respective power lines facing the power supply (11), a transformer (T1) having at least three balanced primary windings (P1 to P3) connected subsequently in series along the respective power lines and a secondary winding (S1), and a voltage comparator (50) connected to the secondary winding (S1) for comparing a voltage induced in the transformer (T1) with a reference voltage and then in the event of a leakage fault providing a tripping signal for the tripping circuit (60) to open the switches (SW1). A circuit path (X) is provided, which has a combined voltage sensor/comparator (30) and extends across opposite sides and externally of the transformer (T1) for sensing and comparing two phase-to-phase voltages with each other and then in the event of a voltage imbalance fault simulating a leakage fault condition for the transformer (T1) to detect and the voltage comparator (50) to provide a tripping signal.
摘要翻译： 一种用于由三相交流电源（11）和负载（12）构成的电源/负载电路中的断路器（10），负载（12）通过三条有功电源线（R- R'，SS'和T-T'）。 断路器（10）包括具有与面对电源（11）的各个电力线串联连接的开关（SW1）的跳闸电路（60），具有至少三个平衡初级绕组（P1至P3）的变压器 ），其沿着各自的电力线和次级绕组（S1）串联连接;以及电压比较器（50），连接到次级绕组（S1），用于将变压器（T1）中感应的电压与参考电压进行比较，然后 在泄漏故障的情况下为脱扣电路（60）提供脱扣信号以断开开关（SW1）。 提供电路路径（X），其具有组合的电压传感器/比较器（30）并且跨过变压器（T1）的相对侧和外部延伸，用于感测并相互比较两个相间电压，然后进入 模拟变压器（T1）检测泄漏故障状态的电压不平衡故障以及电压比较器（50）提供跳闸信号的事件。
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公开(公告)号：EP1155487A1
公开(公告)日：2001-11-21
申请号：EP00902533.9
申请日：2000-01-24
申请人： Lam, Sheirchun
发明人： Lam, Sheirchun
摘要： A circuit breaker (10) for use in a power/load circuit formed by a three-phase AC power supply (11) and a load (12) connected to the power supply (11) by means of three live power lines (R-R', S-S' & T-T'). The circuit breaker (10) comprises a tripping circuit (60) including switches (SW1) connected in series with the respective power lines facing the power supply (11), a transformer (T1) having at least three balanced primary windings (P1 to P3) connected subsequently in series along the respective power lines and a secondary winding (S1), and a voltage comparator (50) connected to the secondary winding (S1) for comparing a voltage induced in the transformer (T1) with a reference voltage and then in the event of a leakage fault providing a tripping signal for the tripping circuit (60) to open the switches (SW1). A circuit path (X) is provided, which has a combined voltage sensor/comparator (30) and extends across opposite sides and externally of the transformer (T1) for sensing and comparing two phase-to-phase voltages with each other and then in the event of a voltage imbalance fault simulating a leakage fault condition for the transformer (T1) to detect and the voltage comparator (50) to provide a tripping signal.
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