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163 条记录 (耗时 0.019 秒)

    Solid-state circuit breaker with fault current conduction
    102.
    发明授权
    Solid-state circuit breaker with fault current conduction 失效
    具有故障电流传导的固态断路器

    公开(公告)号：US5561579A

    公开(公告)日：1996-10-01

    申请号：US334741

    申请日：1994-11-04

    申请人： Laszlo Gyugyi ,  Miklos Sarkozi

    发明人： Laszlo Gyugyi ,  Miklos Sarkozi

    IPC分类号： H01H9/54 ,  H02H7/30 ,  H02H3/00

    CPC分类号： H02H7/30 ,  H01H9/548

    摘要： A solid-state circuit breaker with fault current conduction is described. The circuit includes a power sensor connected to a power line having an up-stream side and a down-stream side. The output of the power sensor is conveyed to a switch selection circuit that identifies a line disturbance on the power line. In response to a line disturbance, the switch selection circuit generates a set of output signals. The output signals force the opening of a fault current interruption circuit including a set of turn-off thyristors. The turn-off thyristors respond to the line disturbance within a fraction of a power signal cycle to provide isolation between the up-stream side and downstream side of the power line. An alternate power source may then be applied to the down-stream side of the power line. If the line disturbance exists on the down-stream side of the power line, the output signals force the closing of a fault current conduction circuit including a set of thyristors connected in series with a reactor. The closing of the fault current conduction circuit forces the conduction of a fault current from the reactor that allows the activation of circuit breakers positioned on the down-stream side of the power line. As a result, a conventional hierarchical circuit breaker control strategy is maintained.

    摘要翻译： 描述了具有故障电流传导的固态断路器。 该电路包括连接到具有上游侧和下游侧的电力线的功率传感器。 功率传感器的输出被传送到识别电力线上的线路干扰的开关选择电路。 响应于线路干扰，开关选择电路产生一组输出信号。 输出信号迫使包括一组关断晶闸管的故障电流中断电路打开。 关断晶闸管在功率信号周期的一小部分内响应于线路干扰，以提供电力线的上游侧和下游侧之间的隔离。 然后可以将替代电源施加到电力线的下游侧。 如果在电力线的下游侧存在线路干扰，则输出信号迫使包括与反应器串联连接的一组晶闸管的故障电流传导电路闭合。 故障电流传导电路的闭合迫使来自电抗器的故障电流的传导允许激活位于电源线下游侧的断路器。 结果，维持传统的分级断路器控制策略。

    Method of and device for protecting electrical power system
    103.
    发明授权
    Method of and device for protecting electrical power system 失效
    保护电力系统的方法和装置

    公开(公告)号：US5305174A

    公开(公告)日：1994-04-19

    申请号：US753945

    申请日：1991-09-03

    申请人： Masao Morita ,  Toshiaki Ueda ,  Yukio Kurosawa ,  Hiroshi Arita ,  Tokio Yamagiwa

    发明人： Masao Morita ,  Toshiaki Ueda ,  Yukio Kurosawa ,  Hiroshi Arita ,  Tokio Yamagiwa

    IPC分类号： H02H9/02 ,  F02B75/02 ,  H02H3/02 ,  H02H7/30 ,  H02H3/08

    CPC分类号： H02H7/30 ,  H02H3/025 ,  F02B2075/027

    摘要： An electrical power system protection device includes a circuit breaker and a switch connected in series to a power line. The protection device also has a current limiting element connected in parallel to the circuit breaker. When the level of electrical current flowing in the power line, detected by a current detector, has exceeded a predetermined first set level, a first over-current detector delivers immediately a trip command to the circuit breaker. As a consequence, fault current is commutated to the current limiting element so that any drop of voltage in the power line upstream of the circuit breaker is greatly suppressed. When a state in which a predetermined second set level is exceeded by the detected current level is continued beyond a predetermined period, a second over-current detector delivers an off command to the switch, thus protecting the upstream portion of the power line against the fault in this power line. The current level is set to fall within a range which activates a momentary element of an over-current relay of a receiving end breaker of a downstream sub-system connected to the power line. In the event of a failure in the downstream power line, the receiving end breaker is tripped immediately so that the sound portion of the power line is reset to a normal state of operation.

    摘要翻译： 电力系统保护装置包括断路器和与电力线串联连接的开关。 保护装置还具有与断路器并联连接的限流元件。 当由电流检测器检测到的在电力线中流动的电流的电平已经超过预定的第一设定电平时，第一过电流检测器立即向断路器提供跳闸命令。 因此，故障电流被转换到限流元件，从而大大抑制了在断路器上游的电力线中的任何电压下降。 当预定的第二设定电平超过检测到的电流电平的状态持续超过预定周期时，第二过电流检测器向开关递送关断命令，从而保护电力线的上游部分免受故障 在这条电力线上。 当前电平被设定为在激活连接到电力线的下游子系统的接收端断路器的过电流继电器的瞬时元件的范围内。 在下游电力线路发生故障的情况下，接收端子断路器立即跳闸，使得电力线路的声音部分被复位到正常的操作状态。

    Zone selective interlock module for use with static trip circuit breakers
    104.
    发明授权
    Zone selective interlock module for use with static trip circuit breakers 失效
    区域选择性互锁模块，用于静态跳闸断路器

    公开(公告)号：US4468714A

    公开(公告)日：1984-08-28

    申请号：US438203

    申请日：1982-11-01

    申请人： Ronald R. Russell

    发明人： Ronald R. Russell

    IPC分类号： H02H7/30 ,  H02H3/00 ,  G01R27/00 ,  H02H3/20 ,  H02H7/00

    CPC分类号： H02H7/30

    摘要： A zone selective interlock module is interposed between a pair of upstream and downstream static trip circuit breakers for controlling the short-time and ground fault zone selective interlock functions of the breakers. When a signal is received from a downstream static trip breaker, the module transmits a low-level interlock signal to a static trip breaker upstream. The interlock signal, in turn, activates the programmer circuit of the upstream breaker causing a shift in the upstream programmer time delay characteristics. The module also provides an energy storage feature to ensure the integrity of the interlock function in the event that the control power is lost upon the occurrence of a fault.

    摘要翻译： 区域选择性互锁模块插入在一对上游和下游静态跳闸断路器之间，用于控制断路器的短时和接地故障区选择性互锁功能。 当从下游静态跳闸断路器接收到信号时，模块向上游的静态跳闸断路器发送低电平互锁信号。 互锁信号又激活上游断路器的编程器电路，导致上游编程器延时特性的偏移。 该模块还提供了一种能量存储功能，以在发生故障时控制电源丢失的情况下确保互锁功能的完整性。

    Power interruption device
    105.
    发明授权
    Power interruption device 失效
    电源中断设备

    公开(公告)号：US4439803A

    公开(公告)日：1984-03-27

    申请号：US326622

    申请日：1981-12-02

    申请人： Sadaaki Baba

    发明人： Sadaaki Baba

    IPC分类号： H01H9/54 ,  H02H3/02 ,  H02H7/30 ,  H02H7/26

    CPC分类号： H02H7/30 ,  H02H3/025

    摘要： A current transformer and current sensing relay are used to determine the maximum conduction time of the main interrupter in a power circuit. The operating time of the current sensing relay is less than that of the main interrupter but greater than that of a plurality of branch interrupters.

    摘要翻译： 电流互感器和电流检测继电器用于确定电源电路中主断路器的最大导通时间。 电流感测继电器的工作时间小于主断路器的工作时间，但大于多个分支断路器的工作时间。

    Long-time and short-time overcurrent signal processor for circuit breaker static trip units
    106.
    发明授权
    Long-time and short-time overcurrent signal processor for circuit breaker static trip units 失效
    用于断路器静态跳闸单元的长时间和短时间过流信号处理器

    公开(公告)号：US4266259A

    公开(公告)日：1981-05-05

    申请号：US72375

    申请日：1979-09-04

    申请人： Edward K. Howell

    发明人： Edward K. Howell

    IPC分类号： H02H3/093 ,  H02H7/30

    CPC分类号： H02H3/093 ,  H02H7/30

    摘要： An overcurrent signal is replicated by current mirrors for joint processing by a long-time trip mode network and a short-time trip mode network pursuant to initiating a circuit breaker trip function after an adjustably predetermined delay predicated on the overcurrent signal magnitude. The former network measures signal against a sloping I.sup.2 t portion of an established trip time curve, while the latter optionally measures the overcurrent signal against a second I.sup.2 t curve portion terminating in a selected one of plural fixed time delay curve portion. Short-time delay zone selective interlocking between upstream and downstream breakers and long-time delay pickup indication are also disclosed.

    摘要翻译： 过电流信号由电流镜复制，用于通过长时间跳闸模式网络和短时间跳闸模式网络进行联合处理，这是由于在基于过电流信号幅度的可调节预定延迟之后启动断路器跳闸功能。 前一个网络针对建立的跳闸时间曲线的倾斜I2t部分测量信号，而后者可选地测量针对终止于多个固定时间延迟曲线部分中选定的一个的第二I2t曲线部分的过电流信号。 还公开了上游和下游断路器之间的短时间延迟区域选择性互锁和长时间延迟拾取指示。