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公开(公告)号：US4438476A
公开(公告)日：1984-03-20
申请号：US378589
申请日：1982-05-17
申请人： Thomas B. Breen
发明人： Thomas B. Breen
IPC分类号： H02H3/093
CPC分类号： H02H3/0935
摘要： Disclosed is a characteristic timer for a protective relay which provides protection for a portion of an A.C. transmission line. The characteristic timer has digital logic elements adapted to external circuitry for selecting one or more desired phase angles which determines the activation time of a characteristic timer, which, in turn, determines the operational characteristic of the protective relay. The digital logic of the characteristic timer is further adapted to an external circuitry for selecting an integrating or non-integrating type function for the characteristic timer.
摘要翻译： 公开了一种用于保护继电器的特征定时器，其为交流输电线路的一部分提供保护。 特征定时器具有适于外部电路的数字逻辑元件，用于选择一个或多个期望的相位角，其确定特征定时器的激活时间，其又确定保护继电器的操作特性。 特征定时器的数字逻辑还适用于选择用于特征定时器的积分或非积分型功能的外部电路。
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公开(公告)号：US4432031A
公开(公告)日：1984-02-14
申请号：US373933
申请日：1982-05-03
CPC分类号： H02H6/005 , H02H3/0935
摘要： A method for detecting excessive current in a system and interrupting the delivery of further current thereto comprises determining actual system current, obtaining a value of a predetermined system parameter indicative of the time the actual system current can safely exist in the system, creating a dynamic history of the predetermined system parameter by repetitively modifying the predetermined system parameter in accordance with actual system current, and interrupting power to the system if the dynamic history of the predetermined system parameter exceeds a predetermined threshold. The predetermined system parameter may be quadratically extended into an undefined region in order to decrease the response time to an overload or fault condition.
摘要翻译： 一种用于检测系统中的过电流并中断其进一步电流的传输的方法，包括确定实际系统电流，获得指示系统当前系统当前可以安全存在于系统中的时间的预定系统参数的值，创建动态历史 通过根据实际系统电流重复地修改预定系统参数，并且如果预定系统参数的动态历史超过预定阈值则中断对系统的功率。 预定的系统参数可以被二次扩展到未定义的区域，以便减少到过载或故障状况的响应时间。
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公开(公告)号：US4428021A
公开(公告)日：1984-01-24
申请号：US405818
申请日：1982-08-06
申请人： Wen T. Chen , Vincent C. Oxley
发明人： Wen T. Chen , Vincent C. Oxley
CPC分类号： H02H3/0935
摘要： Apparatus for monitoring the fault current in the ground conductor of a polyphase AC electrical power system. When the fault current exceeds a predetermined level, the magnetic field produced causes a magnetic reed switch to close and open at twice the AC frequency. Pulse producing circuitry connected to the reed switch responds to the switch action to produce pulses at the same frequency. The pulses are counted by logic circuitry, and when a predetermined number of pulses have been counted, an output signal triggers circuitry which trips circuit breaker apparatus in the power system. The delay period between first detecting the fault current and tripping of the circuit breaker apparatus can be adjusted by changing the number of pulses to be counted by the logic circuitry before it produces an output signal.
摘要翻译： 用于监测多相交流电力系统的接地导体中的故障电流的装置。 当故障电流超过预定电平时，所产生的磁场导致磁簧开关闭合并以两倍的交流频率打开。 连接到舌簧开关的脉冲发生电路响应于开关动作，以产生相同频率的脉冲。 脉冲由逻辑电路计数，并且当已经计数了预定数量的脉冲时，输出信号触发在电力系统中跳闸断路器装置的电路。 可以通过在产生输出信号之前通过改变由逻辑电路计数的脉冲数来调节第一次检测故障电流和断路器装置跳闸之间的延迟时间。
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公开(公告)号：US4363064A
公开(公告)日：1982-12-07
申请号：US287005
申请日：1981-07-27
摘要： An overcurrent protection system adaptable for use with power controllers the single or multi-phase ac, or dc types includes a load current sensing element in combination with an overcurrent sensing/inverse time delay circuit, a power switch and a crowbar circuit. The system also includes a drive circuit, a drive circuit input current sensor, a trip signal detector and a logic circuit. The overcurrent protection system, according to the present invention, uses the drive circuit to power the overcurrent sensing/inverse time delay circuit, to drive the power switch, and to provide a coupling path for an overcurrent fault signal across electrical isolation interface(s) thereof to the logic circuit. Thus, the need for a separate isolated power supply for powering the overcurrent sensing/inverse time delay circuit and the need for separate optical and/or electromagnetic isolation interfaces for coupling of the overcurrent fault signal are eliminated.
摘要翻译： 适用于单相或多相交流或直流型功率控制器的过电流保护系统包括负载电流检测元件，与过电流检测/反时限延迟电路，电源开关和急停电路组合。 该系统还包括驱动电路，驱动电路输入电流传感器，跳闸信号检测器和逻辑电路。 根据本发明的过电流保护系统使用驱动电路为过流检测/反时延延迟电路供电，以驱动电源开关，并且提供跨过电隔离接口的过电流故障信号的耦合路径， 到逻辑电路。 因此，消除了对过电流感测/反时间延迟电路供电的单独隔离电源的需要以及用于耦合过电流故障信号的分离的光学和/或电磁隔离接口的需要。
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95.发明授权Circuit interrupter with digital trip unit and means to enter trip settings 失效具有数字跳闸单元的断路器和进入跳闸设置的手段
公开(公告)号：US4351012A
公开(公告)日：1982-09-21
申请号：US140553
申请日：1980-04-15
CPC分类号： H02H3/006 , H01H2071/006
摘要： A circuit breaker includes a digital electronic trip unit having a microprocessor. The front panel of the trip unit includes a potentiometer connected across a reference voltage, and a numeric display device. The potentiometer is adjusted by an operator to enter a value of a parameter defining the time-current characteristic of the circuit breaker. An analog-to-digital converter receives the voltage supplied by the potentiometer and converts it to a digital quantity for use by the microcomputer in performing limit checks with the current flow through the contacts of the breaker. The microcomputer formats the converted digital value of the potentiometer voltage and supplies it to a front panel-visible numeric display so that the value of the potentiometer setting as interpreted by the microcomputer in defining the time-current trip characteristic is presented on the numeric display to provide real-time feedback to the operator as he adjusts the parameter value.
摘要翻译： 断路器包括具有微处理器的数字电子跳闸单元。 跳闸单元的前面板包括连接在参考电压上的电位器和数字显示装置。 电位器由操作者进行调整，以输入定义断路器时间电流特性的参数值。 模数转换器接收由电位计提供的电压并将其转换为数字量，供微型计算机使用，并通过断路器的触点进行限流检查。 微型计算机对转换后的电位器电压进行格式化并将其提供给前面板可视数字显示屏，以便在数字显示屏上显示由微型计算机解释的电位器设置值，用于定义时间 - 电流跳闸特性 在调整参数值时，向操作员提供实时反馈。
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96.发明授权Circuit interrupter with digital trip unit and optically-coupled data input/output system 失效具有数字跳闸单元和光耦合数据输入/输出系统的断路器
公开(公告)号：US4338647A
公开(公告)日：1982-07-06
申请号：US140627
申请日：1980-04-15
申请人： John T. Wilson , John A. Wafer , Joseph C. Engel , Robert T. Elms
发明人： John T. Wilson , John A. Wafer , Joseph C. Engel , Robert T. Elms
CPC分类号： H02H1/0069
摘要： A circuit breaker includes a microprocessor-based trip unit having an optically coupled data input/output system. A pulse transformer receives input pulses generated by the execution of instructions in said microcomputer and supplies these pulses to a plurality of optical isolators, thereby reducing the power requirements of the optically isolated interface system to a value sufficient to allow complete operating power to be supplied to the trip unit and the data input/output system from the sensing current transformers within the circuit breaker housing.
摘要翻译： 断路器包括具有光耦合数据输入/输出系统的基于微处理器的跳闸单元。 脉冲变压器接收通过执行所述微计算机中的指令而产生的输入脉冲，并且将这些脉冲提供给多个光隔离器，从而将光隔离接口系统的功率需求降低到足以允许完整的工作功率被提供给 断路单元和数据输入/输出系统中的断路器外壳内的感应电流互感器。
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公开(公告)号：US4297741A
公开(公告)日：1981-10-27
申请号：US72374
申请日：1979-09-04
申请人： Edward K. Howell
发明人： Edward K. Howell
摘要： Air core current transformers respectively linked with the phase conductors of a power distribution circuit develop secondary voltage signals proportional to the rates of change of the phase currents. A full-wave rectifying network provides a rectified output voltage signal corresponding to the highest magnitude secondary voltage signal. A comparator issues a circuit breaker trip initiating signal when the output voltage signal achieves a pre-selected threshold voltage.
摘要翻译： 分别与配电电路的相导体连接的空心电流互感器产生与相电流变化率成比例的次级电压信号。 全波整流网络提供对应于最高幅度二次电压信号的整流输出电压信号。 当输出电压信号达到预先选择的阈值电压时，比较器发出断路器跳闸启动信号。
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公开(公告)号：US4279007A
公开(公告)日：1981-07-14
申请号：US57054
申请日：1979-07-12
申请人： Alan B. Shimp
发明人： Alan B. Shimp
摘要： An electronic control system and associated circuit breaker is taught in which the effect of in-rush current on mining equipment, for example, in regard to tripping is minimized even though a single phase fault of an equal magnitude is adequately provided for. This is done even though the same circuit breaker system and circuit breaker for both situations is utilized. A resistive capacitive series network is utilized to separate the ripple frequency from the DC value of the overload current being sensed. If the ripple component is relatively high for a given amount of overload current in the lines to be protected, then that is indicative of a single-phase fault for which circuit breaker tripping should be provided. If on the other hand the same amount of current causes a ripple component of a relatively low value, that is indicative of balanced three-phased overload which is usually indicative of in-rush or spurious transients. In any case, higher values of overload will cause other portions of the circuit to trip for safety. A time delay is provided at the output of an operational amplifier interconnected with the series resistive capacitive circuit. The time delay provides further protection against spurious tripping. Furthermore, tuned feedback is provided for the operational amplifier to distinguish between the ripple frequency of a single-phase fault and the ripple frequency of a three-phase fault.
摘要翻译： 教导了一种电子控制系统和相关联的断路器，其中即使适当地提供相等幅度的单相故障，使得采矿设备中的冲击电流对于跳闸的影响最小化。 即使使用相同的断路器系统和两种情况下的断路器也可以完成。 电阻式电容串联网络用于将纹波频率与正在感测的过载电流的直流值进行分离。 如果要保护的线路中的给定量的过载电流的纹波分量相对较高，则表示应提供断路器跳闸的单相故障。 另一方面，如果相同的电流量导致相对低的值的波动分量，这表示平衡的三相过载，其通常表示涌入或杂散瞬变。 在任何情况下，为安全起见，较高的过载值将导致电路的其他部分跳闸。 在与串联电阻电容电路互连的运算放大器的输出处提供时间延迟。 时间延迟提供进一步的保护，防止虚假跳闸。 此外，为运算放大器提供调谐反馈，以区分单相故障的纹波频率和三相故障的纹波频率。
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公开(公告)号：US4272816A
公开(公告)日：1981-06-09
申请号：US32684
申请日：1979-04-23
申请人： Yoshihiro Matsumoto
发明人： Yoshihiro Matsumoto
CPC分类号： H02H3/0935
摘要： In an overcurrent protecting apparatus for interrupting overcurrent in accordance with a coordination tripping curve characteristic, there are provided a microcomputer, a current/voltage converter for converting an overcurrent into a first voltage, D/A converting means for converting each output successively delivered from the microcomputer into a second voltage, and comparator means for comparing the first voltage with the second voltage. The delivering of the outputs from the microcomputer to the D/A converting means continues until an output is delivered from the comparator means to a first input of the microcomputer. Another comparator is also provided for delivering its output to a second input of the microcomputer when the first voltage is extremely high.
摘要翻译： 在根据协调跳闸曲线特性中断过电流的过电流保护装置中，设置有微电脑，用于将过电流转换为第一电压的电流/电压转换器，用于转换从 微型计算机转换成第二电压，以及用于将第一电压与第二电压进行比较的比较装置。 从微型计算机输出到D / A转换装置的输出继续，直到输出从比较器装置传送到微型计算机的第一输入。 还提供另一个比较器，用于当第一电压极高时将其输出传递到微计算机的第二输入端。
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100.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
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。
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