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1. 发明授权

US4553188A Sectionalizer 失效
标题翻译：分片器
公开(公告)号：US4553188A
公开(公告)日：1985-11-12
申请号：US497938
申请日：1983-05-25
申请人： David R. Aubrey , Stephen J. Kearley
发明人： David R. Aubrey , Stephen J. Kearley
IPC分类号： H01H71/14 , H02H3/06 , H02H3/07
CPC分类号： H02H3/063 , H01H71/14
摘要： A method of isolating a spur line of an electrical power system protected by a multi-shot resetting circuit breaker wherein at least two successive current surges in the spur line which activate the circuit breakers are detected. In response to the detection the spur line is isolated during a subsequent current dead period.A sectionalizer is described for isolating a spur line of an electrical power system protected by a multi-shot resetting circuit breaker. The sectionalizer comprises a metal casing 22 providing a current path across a fuse mounting 10 while the sectionalizer is in a conducting position. An electrical circuit 23 inside the tube detects at least two successive current surges in the casing and during the following dead period actuates a chemical actuator 14 to trip the sectionalizer out of its conducting position.
摘要翻译：一种隔离由多重复位断路器保护的电力系统的支线的方法，其中检测到激励断路器的支线中的至少两个连续的电流浪涌。响应于检测，支线在随后的当前死区期间被隔离。描述了用于隔离由多重复位断路器保护的电力系统的支线的分段器。分段器包括金属壳体22，当分段器处于导通位置时，金属壳体22提供穿过保险丝安装件10的电流路径。管内的电路23检测壳体中至少两个连续的电流浪涌，并且在随后的死区期间致动化学致动器14以使分段器脱离其导通位置。

2. 发明授权

US4797775A Symmetrical fault current detector 失效
标题翻译：对称故障电流检测器
公开(公告)号：US4797775A
公开(公告)日：1989-01-10
申请号：US854246
申请日：1986-04-21
申请人： David R. Aubrey , Ian Jameson
发明人： David R. Aubrey , Ian Jameson
IPC分类号： H02H3/08 , H02H3/087
CPC分类号： H02H3/08
摘要： Excess currents due to faults in an electrical power system are generally larger than excess currents due to the magnetization of distribution transformers. Discrimination has hitherto relied on a threshold detector. Magnetizing currents are, however, asymmetrical, whereas fault currents are symmetrical. A detector detects symmetrical current waveforms on a conductor 1 and thus discriminates between a fault and a magnetizing excess current. A resistor 4, placed across the output terminals of a bridge rectifier 3 has a resistance selected so that the voltage across it exceeds the breakdown voltage of trigger diodes 7 and 8 when the current in conductor 1, in any half cycle, exceeds a desired maximum. Capacitors 13 and 14 will thus only both charge up in response to an excessive symmetrical current. A logic control 23 is connected via lines 21 and 22 to detect such a condition.
摘要翻译：由于配电变压器的磁化，电力系统中的故障导致的过多电流通常大于过电流。迄今为止，歧视依赖于阈值检测器。然而，磁化电流是不对称的，而故障电流是对称的。 A检测导体1上的对称电流波形，从而识别故障和磁化过剩电流。布置在桥式整流器3的输出端子上的电阻器4具有选择的电阻，使得当导体1中的电流在任何半周期内超过期望的最大值时，其两端的电压超过触发二极管7和8的击穿电压。因此，电容器13和14将仅响应于过大的对称电流而充电。逻辑控制器23经由线21和22连接以检测这种状况。

3. 再颁专利

USRE34163E Symmetrical fault current detector 失效
公开(公告)号：USRE34163E
公开(公告)日：1993-01-19
申请号：US668101
申请日：1991-03-12
申请人： David R. Aubrey , Ian Jameson
发明人： David R. Aubrey , Ian Jameson
IPC分类号： H02H3/08
CPC分类号： H02H3/08
摘要： Excess currents due to faults in an electrical power system are generally larger than excess currents due to the magnetization of distribution transformers. Discrimination has hitherto relied on a threshold detector. Magnetizing currents are, however, asymmetrical, whereas fault currents are symmetrical. A detects symmetrical current waveforms on a conductor 1 and thus discriminates between a fault and a magnetizing excess current. A resistor 4, placed across the output terminals of a bridge rectifier 3 has a resistance selected so that the voltage across it exceeds the breakdown voltage of trigger diodes 7 and 8 when the current in conductor 1, in any half cycle, exceeds a desired maximum. Capacitors 13 and 14 will thus only both charge up in response to excessive symmetrical current. A logic control 23 is connected via lines 21 and 22 to detect such a condition.

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