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    • 4. 发明授权
    • Electrical switching apparatus and method employing acoustic and current signals to distinguish between parallel and series arc faults
    • 电气开关装置和方法采用声流和电流信号来区分并联和串联电弧故障
    • US07403129B2
    • 2008-07-22
    • US11431332
    • 2006-05-10
    • Xin ZhouJerome K. HastingsJoseph C. Zuercher
    • Xin ZhouJerome K. HastingsJoseph C. Zuercher
    • G08B21/00
    • H01H83/20G01R31/1272H01H2083/201H02H1/0023
    • A circuit breaker includes a first lug and second and third acoustic lugs electrically connected to a power circuit. Separable contacts are electrically connected in series between the first lug and the second acoustic lug. An operating mechanism opens and closes the separable contacts. A first acoustic sensor is coupled to the second acoustic lug and senses a first acoustic signal from the second acoustic lug. A second acoustic sensor is coupled to the third acoustic lug and senses a second acoustic signal from the third acoustic lug. The first and second acoustic signals are operatively associated with a power circuit fault. A current sensor senses a current flowing between the first and second lugs. A circuit inputs the sensed acoustic signals and the sensed current and detects and distinguishes a parallel arc fault or a series arc fault from the sensed acoustic signals and the sensed current.
    • 断路器包括电连接到电源电路的第一凸耳和第二和第三声学凸耳。 可分离的触点串联地电连接在第一凸耳和第二声学凸耳之间。 操作机构打开和关闭可分离触点。 第一声​​传感器耦合到第二声耳,并且感测来自第二声耳的第一声信号。 第二声传感器耦合到第三声耳片并感测来自第三声耳的第二声信号。 第一和第二声信号与电源电路故障可操作地相关联。 电流传感器感测在第一和第二凸耳之间流动的电流。 A电路输入感测到的声信号和检测到的电流,并检测并区分平行电弧故障或串联电弧故障与感测到的声信号和检测到的电流。
    • 8. 发明授权
    • Method and apparatus for detecting and suppressing a parallel arc fault
    • 用于检测和抑制并联电弧故障的方法和装置
    • US06590757B2
    • 2003-07-08
    • US09967116
    • 2001-09-28
    • Birger PahlRonald R. JahnWilliam E. BerkopecSlobodan KrsticJoseph C. ZuercherJerome K. Hastings
    • Birger PahlRonald R. JahnWilliam E. BerkopecSlobodan KrsticJoseph C. ZuercherJerome K. Hastings
    • H02N308
    • H02H3/0935H02H1/0015
    • Electrical equipment (14) is safeguarded from damage due to parallel arc faults by a circuit that provides several levels of protection. A semiconductor switch (18) and a current sensor (24) are placed in series with the electrical equipment (14). When the current to the equipment exceeds a first threshold for a predefined period of time, the semiconductor switch (18) is rendered non-conductive until the circuit is specifically reset. When the current to the equipment exceeds a greater second threshold, a pulsed signal alternately places the semiconductor switch (18) in conductive and non-conductive states so that the average current applied to the equipment (14) is within an acceptable level. The pulses are measured to determine whether a parallel arc fault has occurred. When the measured pulses (74) are within a predetermined range, a parallel arc fault is declared and the semiconductor switch (18) is rendered non-conductive. Should the current exceed an even greater third threshold, the semiconductor switch (18) is immediately rendered non-conductive until the circuit is manually reset.
    • 电气设备(14)通过提供多级保护的电路可以避免由于并联电弧故障造成的损坏。 半导体开关(18)和电流传感器(24)与电气设备(14)串联放置。 当到设备的电流超过预定时间段的第一阈值时,半导体开关(18)变为不导通,直到电路被特别复位。 当到设备的电流超过更大的第二阈值时,脉冲信号交替地将半导体开关(18)置于导电和非导通状态,使得施加到设备(14)的平均电流在可接受的水平内。 测量脉冲以确定是否发生并联电弧故障。 当测量的脉冲(74)在预定范围内时,声明并联电弧故障,并使半导体开关(18)变为不导通。 如果电流超过了更大的第三阈值,则半导体开关(18)立即变为不导通,直到电路被手动复位。