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21. 发明授权

US5329415A Clutch-brake drive control for press machine 失效
标题翻译：压力机离合器制动驱动控制
公开(公告)号：US5329415A
公开(公告)日：1994-07-12
申请号：US871080
申请日：1992-04-20
申请人： Yasuhiko Oyamada
发明人： Yasuhiko Oyamada
IPC分类号： B30B15/14 , B30B15/28 , H02H3/28
CPC分类号： B30B15/28 , B30B15/142
摘要： An ON-OFF control of a clutch-brake for a press machine, having fail-safe operation. The clutch-brake drive control is provided by turning double solenoid valves on and off. Two lines of drive control signal generators output drive control signals to semiconductor elements when a running command pulse signal is recognized as valid. A bus collating circuit forcibly cuts off AC power supplies of solenoid driving circuits when synchronization and coordination of the operation of each of the lines are checked and found not in coordination. Two lines of fault detecting circuitry forcibly cuts off the AC power supplies of the solenoid driving circuits by automatically detecting a fault of the semiconductor elements.
摘要翻译：用于冲压机的离合器制动器的开 - 关控制，具有故障保护操作。通过打开和关闭双电磁阀来提供离合器 - 制动器驱动控制。当运行命令脉冲信号被识别为有效时，两行驱动控制信号发生器将驱动控制信号输出到半导体元件。总线整理电路在同步和协调每条线路的操作时强制切断电磁线圈驱动电路的交流电源，并不协调发现。两行故障检测电路通过自动检测半导体元件的故障强制地切断螺线管驱动电路的交流电源。

22. 发明授权

US5270897A Personnel protection system for electrical power connections 失效
标题翻译：电力连接人事保护系统
公开(公告)号：US5270897A
公开(公告)日：1993-12-14
申请号：US792183
申请日：1991-11-14
申请人： Thomas M. McDonald , W. Reid Smith-Vaniz
发明人： Thomas M. McDonald , W. Reid Smith-Vaniz
IPC分类号： H02H3/33 , H02H5/12 , H02H3/28
CPC分类号： H02H3/334 , H02H5/12
摘要： A personnel protection system for electrical connections is disclosed, which is of the type that differentially senses the current flow between the power lead and the return lead (or between two power loads) is provided with an unbalancing impedance which makes the current difference between the two leads sufficiently high to trip the device and cause the power to be disconnected. A utilization device is similarly provided with an imbalanced impedance. However, that impedance is calculated to counteract the current imbalance caused by the first impedance, so that when the cable is connected to the utilization device, the current balance between the two conductors is restored, and power connection is maintained in the cable. In addition, the current flow in the second impedance is sensed and, if it is not at the correct level, electrical power to the load is disconnected in the same manner as when an imbalance occurs. Thus, the system does not provide continuous power unless predetermined conditions considered safe for securing the power are fully satisfied.
摘要翻译：公开了一种用于电气连接的人员保护系统，其类型是在电源引线和返回引线（或两个功率负载之间）之间差异地感测电流的情况下具有不平衡阻抗，这使得两者之间的电流差异导线足够高以使设备跳闸并导致电源断开。利用装置类似地具有不平衡阻抗。然而，该阻抗被计算为抵消由第一阻抗引起的电流不平衡，使得当电缆连接到利用装置时，两个导体之间的电流平衡被恢复，并且电缆中保持电力连接。此外，感测到第二阻抗中的电流，如果不是在正确的水平，则以与发生不平衡时相同的方式断开对负载的电力。因此，系统不提供连续的功率，除非被认为是安全的，以确保电力的预定条件得到充分满足。

23. 发明授权

US5047890A Differential current protection circuits 失效
标题翻译：差动保护电路
公开(公告)号：US5047890A
公开(公告)日：1991-09-10
申请号：US491764
申请日：1990-03-12
申请人： Leland L. Kessler
发明人： Leland L. Kessler
IPC分类号： H02H3/30 , H02H3/28
CPC分类号： H02H3/28
摘要： A differential protection circuit includes a pair of current transformers each having a secondary winding and each being inductively coupled to a power conductor at a different location. The secondary windings of these transformers are electrically connected in series with each other in a loop in a bucking arrangement. A resistor is connected in parallel with the secondary winding of each transformer. Control circuits are connected to sense a voltage signal appearing across the resistor and to take appropriate action when the sensed voltage reaches a predetermined level. An additional winding on one of the transformers provides isolation between the loop and one of the control circuits to prevent false tripping of the differential protection circuit.

24. 发明授权

US4939617A Method and apparatus for monitoring an AC transmission line 失效
标题翻译：用于监控交流传输线的方法和装置
公开(公告)号：US4939617A
公开(公告)日：1990-07-03
申请号：US349330
申请日：1989-05-05
申请人： Gary R. Hoffman , Walter L. Hinman
发明人： Gary R. Hoffman , Walter L. Hinman
IPC分类号： H02H3/00 , H02H3/28 , H02H7/26
CPC分类号： H02H7/263
摘要： The invention is directed to an improved method and apparatus for monitoring the status of an AC electrical transmission line connected between first and second locations. In a disclosed embodiment of the method of the invention, first signal parameter values are generated, for the first location, by time integrating between zero-crossings of an AC signal parameter measured at the first location. Second signal parameter values are generated, for the second location, by time integrating between zero-crossings of the AC signal parameter measured at the second location. The second signal parameter values are transmitted to the first location. In a form of this embodiment, the second signal parameter values transmitted for each of the three phases are transmitted only for time periods between successive zero-crossings beginning with a zero-crossing of one sense (e.g. positive-going zero-crossings), and the second signal parameter value for the ground reference return is transmitted only for time periods between successive zero-crossings beginning with a zero-crossing of an opposite sense (e.g. negative-going zero-crossings) to said one sense. This technique can provide a further saving of bandwidth without substantial compromise of tripping response time.
摘要翻译：本发明涉及一种用于监测连接在第一和第二位置之间的交流输电线的状态的改进的方法和装置。在本发明方法的公开实施例中，通过在第一位置处测量的AC信号参数的过零点之间的时间积分，为第一位置产生第一信号参数值。对于第二位置，通过在第二位置处测量的AC信号参数的过零点之间的时间积分来生成第二信号参数值。第二信号参数值被发送到第一位置。以本实施例的形式，对于三个相位中的每一个发送的第二信号参数值仅在从一个感测（例如，正向过零点）的零交叉开始的连续过零点之间的时间段内传送，以及接地参考返回的第二信号参数值仅在连续的过零点之间的时间段被发送，从与所述一个方向相反的意义（例如负向过零点）的过零点开始。该技术可以进一步节省带宽，而不会大大损害跳闸响应时间。

25. 发明授权

US4862308A Power bus fault detection and protection system 失效
标题翻译：电源总线故障检测和保护系统
公开(公告)号：US4862308A
公开(公告)日：1989-08-29
申请号：US44647
申请日：1987-05-01
申请人： Eric A. Udren
发明人： Eric A. Udren
IPC分类号： H02H3/28 , H02H3/50
CPC分类号： H02H3/50 , H02H3/28
摘要： A power bus fault detector for detecting faults in a predefined portion of an electrical power bus having at least one phase. Power feed lines are coupled to the predefined portion of the power bus by circuit breakers. Current transformers are used to detect the current flowing through each phase of each power feed line which is coupled to the predefined portion of the power bus. A summer generates a current differential signal for each phase that is equal to the sum of the currents detected by the current transformers. A fault detector generates a trip signal which causes the feed line circuit breakers to disconnect the feed lines from the power bus when a fault is detected in the predefined portion of the power bus. The fault detector includes a detector which detects when the current differential signal in any of the power bus's phases is substantially nonsinusoidal in shape. In a preferred embodiment, the fault detector detects when, for any of the phases, the percentage of time that the magnitude of the current differential signal exceeds a fault cutoff value is greater than the percentage of time that the current differential value exceeds the fault cutoff value for a known minimum fault.
摘要翻译：一种电力总线故障检测器，用于检测具有至少一个相位的电力总线的预定义部分中的故障。电力馈线通过断路器耦合到电力总线的预定义部分。电流互感器用于检测流过每个馈电线的每相的电流，该馈电线耦合到电力总线的预定义部分。夏天为每个相位产生等于由电流互感器检测的电流之和的电流差分信号。故障检测器产生跳闸信号，当在电源总线的预定义端口中检测到故障时，引起馈线断路器将电源线与电源总线断开。故障检测器包括检测器，其检测任何电力总线相位中的电流差分信号何时基本上是非正弦形的。在优选实施例中，故障检测器检测当前差分信号的幅度超过故障截止值的时间的任何阶段何时大于电流差值超过故障截止时间的百分比已知最小故障值。

26. 发明授权

US4825326A Digital calculation type differential relay 失效
标题翻译：数字计算型差动继电器
公开(公告)号：US4825326A
公开(公告)日：1989-04-25
申请号：US60351
申请日：1987-06-10
申请人： Fumio Andow , Noriyoshi Suga
发明人： Fumio Andow , Noriyoshi Suga
IPC分类号： H02H3/28 , H02H3/44 , H02H7/22 , H02H3/08
CPC分类号： H02H3/283 , H02H7/22 , H02H3/44
摘要： In differential function calculation processing, a value of differential function f(d) is calculated using differences between a plurality of predetermined number p of differential current data Dd sampled at different sampling times. The differential current data is data obtained from differential current Id or a sum of data Dj (j=1 to n where n is the number of the respective terminal currents) obtained from respective terminal currents Ipj. In restraint data calculation processing, restraint data Dr is calculated using respective terminal current data Dj sampled at the same sampling time. In restraint function calculation processing, a value of restraint function f(r) is calculated using differences between a plurality of predetermined number p of restraint data Dr sampled at different sampling times. Then, in comparison processing, the value of differential function f(d) is compared with the value of restraint function f(r). If the value of differential function f(d) is smaller than a value, modified by a predetermined relationship, of restraint function f(r), an inhibit output is generated in the comparison processing. Differential relay processing inhibits a trip operation of a circuit breaker by the inhibit output from the comparison processing. The differential relay processing is so controlled as to execute the trip operation when the inhibit output is not present.

27. 发明授权

US4631622A Multiple static trip circuit breaker coordination 失效
标题翻译：多个静态跳闸断路器协调
公开(公告)号：US4631622A
公开(公告)日：1986-12-23
申请号：US687880
申请日：1984-12-31
申请人： Edward K. Howell
发明人： Edward K. Howell
IPC分类号： H02H3/28 , H02H7/22
CPC分类号： H02H7/22 , H02H3/28
摘要： Differential current static trip circuits interconnected with upstream and downstream current sensing transformers in a protected system provide automatic coordination of the downstream static trip circuit breakers. The differential current transformer associated with the breakers vectorially sense the difference between the upstream breaker currents and the sum of the downstream breaker currents. The output is processed within the trip circuits for I.sup.2 t and fixed time band delays to insure that the downstream breakers clear the fault.
摘要翻译：与受保护系统中的上游和下游电流检测变压器互连的差分电流静态跳闸电路提供下游静态跳闸断路器的自动协调。与断路器相关的差动电流互感器可以矢量地感测上游断路器电流与下游断路器电流之和的差异。输出在跳闸电路内处理，用于I2t和固定时间带延迟，以确保下游断路器清除故障。

28. 发明授权

US4464697A Protective relay system 失效
标题翻译：保护继电器系统
公开(公告)号：US4464697A
公开(公告)日：1984-08-07
申请号：US397758
申请日：1982-07-13
申请人： Shan C. Sun
发明人： Shan C. Sun
IPC分类号： H02H3/28 , H02H3/30 , H02H7/26
CPC分类号： H02H7/262
摘要： Protective relaying apparatus of the pilot type, incorporating a direct transfer trip function (DTT) which reliably and securely utilizes the same communication channel utilized by the pilot relaying function. The DTT function operates within the constraints of a PPM modem, utilizing a signal extracted from the carrier signal, to provide a perfectly synchronized tone for the DTT signal.
摘要翻译：导频类型的保护中继装置，结合了直接传输跳闸功能（DTT），可靠且可靠地利用导频中继功能使用的相同通信信道。 DTT功能在PPM调制解调器的约束下运行，利用从载波信号提取的信号，为DTT信号提供完美同步的音调。

29. 发明授权

US4441134A Circuit breakers sensitive to leakage currents 失效
标题翻译：断路器对漏电流敏感
公开(公告)号：US4441134A
公开(公告)日：1984-04-03
申请号：US359494
申请日：1982-03-18
申请人： Jacques Lewiner , Didier Perino , Claude Hennion
发明人： Jacques Lewiner , Didier Perino , Claude Hennion
IPC分类号： H02H3/027 , H02H3/07 , H02H3/33 , H02H3/28
CPC分类号： H02H3/027 , H02H3/07 , H02H3/33
摘要： The invention relates to a circuit breaker for cutting off the two AC supply leads of an electrical receiver from the time of creation of a leakage current F between said receiver and ground through a human body. This circuit breaker comprises a differential transformer generating a faulty voltage V.sub.O, a relay with contacts open when it is not energized, and means (A.sub.1,A.sub.2, . . . A.sub.n ; R.sub.1,R.sub.2 . . . R.sub.n) supplied by the system, adapted to exploit the voltage V.sub.O for the purposes of energizing the relay if the current F is dangerous or at least unpleasant in its intensity and/or its duration, without however being sensitive to disturbances.
摘要翻译：本发明涉及一种断路器，用于在通过人体产生所述接收器和接地之间的漏电流F时，切断电接收器的两个AC电源引线。该断路器包括产生故障电压VO的差分变压器，当未通电时触点断开的继电器，以及由系统提供的装置（A1，A2，...，R1，R2 ... Rn）如果电流F是危险的或至少在其强度和/或其持续时间令人不愉快的情况下，利用电压VO来为继电器通电，而不对干扰敏感。

30. 发明授权

US4384248A Method and apparatus for detecting shortcircuit in arm of GTO inverter 失效
标题翻译： GTO逆变器臂的短路检测方法及装置
公开(公告)号：US4384248A
公开(公告)日：1983-05-17
申请号：US160174
申请日：1980-06-17
申请人： Yasuo Matsuda , Kazuo Honda , Takeo Maeda
发明人： Yasuo Matsuda , Kazuo Honda , Takeo Maeda
IPC分类号： G01R31/02 , H02H7/122 , H02H3/28
CPC分类号： G01R31/025 , H02H7/1225
摘要： Shortcircuit in an arm including a series connection of GTO's and reactors of an inverter is detected by sensing a voltage across the reactor. In one method, the shortcircuit in the arm is detected when voltages are coincidently applied to a P-line arm reactor and an N-line arm reactor for a predetermined time period. In another method, it is detected when an integrated value of a voltage across at least one of the reactors exceeds a predetermined level.
摘要翻译：通过感测反应堆两端的电压来检测包括GTO和逆变器的反应器的串联连接的臂中的短路。在一种方法中，当预定时间段内的电压一致地施加到P线臂式电抗器和N型臂式电抗器时，检测到臂中的短路。在另一种方法中，当跨过至少一个电抗器的电压的积分值超过预定电平时检测。

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