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41. 发明专利

JPH07222346A EARTH LEAKAGE BREAKER 失效
公开(公告)号：JPH07222346A
公开(公告)日：1995-08-18
申请号：JP844094
申请日：1994-01-28
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWAMI EIJI , MATSUDA JUNICHI
IPC分类号： H02H3/347
摘要： PURPOSE:To grasp the leakage current correctly by operating and storing the conversion ratio of art output signal to a simulated leakage current and correcting the output signal to be used actually. CONSTITUTION:A signal from a simulated current output section 6e of a microcomputor 6 is converted through a current conversion circuit 10 into a simulated leakage current being fed to a zero-phase current transformer 1. The zero-phase current transformer 1 de.livers an output signal proportional to the simulated leakage current which is amplified through a sensitivity amplifier 3 and fed to a leakage decision means 6a in the microcomputor 6. The microcomputor 6 operates and stores a conversion ratio, i.e.m the ratio of output signal to the simulated leakage current, at a conversion ratio determining section 6c. Even if leakage current of different levels are generated during actual use of an earth leakage breaker, the quantity of leakage current can be decided correctly through the leakage decision means 6a by correcting the output signal using the conversion ratio as a constant of proportion so long as the conversion ratio is stored at the section 6c.

42. 发明专利

JPH06187896A CIRCUIT BREAKER WITH BUILT-IN TRANSMISSION UNIT 失效
公开(公告)号：JPH06187896A
公开(公告)日：1994-07-08
申请号：JP34006692
申请日：1992-12-21
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWAMI EIJI
IPC分类号： H01H83/02
摘要： PURPOSE:To prevent misunderstanding of a temporary communication-unable condition, between a transmission unit and a sensor circuit part, as the OFF- condition of a handle. CONSTITUTION:A waiting time for communication-possible, longer than a communication-recovery time to communicable normal recovery from after the occurrence of a communication-unable condition, due to the momentary interruption and outrage, and noise of the operating power source for a sensor circuit part 5 monitoring a cable way condition, is set to a transmission unit 6; and communication is made to the sensor circuit part 5 from the transmission unit 6 after the waiting time for communication-possible elapses after the occurrence of the communication-unable condition. A power source voltage observing circuit 4 is attached to supply a reset signal to a sensor circuit part 5 at the rime of the occurrence of the abnormality of the operating power source for the sensor circuit part 5. Conseaquently, when a temporary communication- unable condition, between the transmission unit and the sensor circuit part, occures due to the momentary interruption and outrage and noise of the operating power source of a sensor circuit part, the sensor circuit part is automatically reset to recover a communication-possible condition.

43. 发明专利

JPH05174693A CIRCUIT BREAKER FOR WIRING 失效
公开(公告)号：JPH05174693A
公开(公告)日：1993-07-13
申请号：JP33827091
申请日：1991-12-20
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWAMI EIJI , AOYAMA YOICHI , MATSUDA JUNICHI , KURODA MITSUNOBU
IPC分类号： H01H71/04
摘要： PURPOSE:To attain wire saving in the case where plural number of data possessed by a circuit breaker for wiring are transmitted to a controller as well as to increase withstanding property of data to noise, an induced voltage and current generated at a breaking time and so on. CONSTITUTION:A sensor circuit section 8 to monitor a cable run condition and a transmission unit 15 which carries out data exchange between it and the sensor circuit section 8 and also carries out data exchange between it and a controller in a multiplex transmission system, are housed in a wiring use circuit breaked body 1. The sensor circuit section 8 has a sensor 3 and a sensor microcomputer 7 to carry out operation processing on the output signal. The transmission unit 15 has a transmitting microcomputer 10 which carries out data exchange between it and the sensor microcomputer 7 and also carries out data exchange between it and the controller. An insulating circuit 14 is interposed between the transmitting microcomputer 10 and the sensor microcomputer 7.

44. 发明专利

JP2000270470A FEEDER SYSTEM 失效
公开(公告)号：JP2000270470A
公开(公告)日：2000-09-29
申请号：JP6919899
申请日：1999-03-15
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWAMI EIJI , GOTO KIYOSHI , KUNIMOTO YOICHI
IPC分类号： H02H3/24 , G01R31/02 , H02H3/00 , H02H11/00
摘要： PROBLEM TO BE SOLVED: To increase safety by connecting a conductor plate for making connection to a pin for grounding to a grounding wire extension conductor, and by providing a detection part for detecting whether a detection wire is connected to the grounding wire extension conductor or not. SOLUTION: A conductor plate 9a is connected to a detection wire 15, and a conductor plate 9b is connected to a ground wire 4 for connecting to a ground extension conductor 8a where the ground wire 4 is extended. The continuity/non- continuity between the detection wire 15 and the ground wire extension conductor 8a is made by a detection part 16. At the detection part 16, the series connection of a current generation part 17 and a load 18 is inserted between an end that is not connected to the conductor plate 9a of the detection wire 15 and an end that is not connected to the conductor plate 9b of the ground wire extension conductor 8a, and a load voltage detection part 19 that detects the voltage across the ends of the load part 18 is provided, thus preventing an operator from using a feeder system without knowing the possibility of electric shock and a burn while the ground path has been broken and hence achieving an extremely safe feeder system.

45. 发明专利

JPH1169632A SOLAR POWER GENERATION SYSTEM 失效
公开(公告)号：JPH1169632A
公开(公告)日：1999-03-09
申请号：JP21885897
申请日：1997-08-13
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： KUNIMOTO YOICHI , KOSHIN HIROAKI , MUKAI CHUKICHI , HIGASHIHAMA HIROTADA , YUASA HIROAKI , ONO HIROYUKI , IWAMI EIJI , USUI HISAMI , OKAMOTO SHINICHIRO
IPC分类号： H02J7/35 , H02J3/38 , H02J9/06 , H02M7/48 , H02N6/00
摘要： PROBLEM TO BE SOLVED: To provide a solar power generation system in which a parallel-off switch and a power converter are installed so as to be close, in which a signal line is made short, which increases noise resistant property and which prevents malfunctions. SOLUTION: In a system, a system interconnection operation is performed between a power converter 23, which converts a direct current to be output from a solar cell 20 into an alternating current and a commercial power supply AC. When a system-interconnection protective device 25 detects an abnormality or the power failure of a commercial power supply AC, it drives parallel-off switches 22a, 22b so as to perform a system splitting operation and to be reported to the power converter 23. A linkage breaker 21 is inserted across a main line Lm, which is connected to the commercial power supply AC via a master breaker 12 and the parallel-off switches 22a, 22b. The master breaker 12 and the linkage breaker 21 are housed in a distribution board 1, and the parallel-off switches 22a, 22b are housed in a box 2 as a body which is separated from a distribution board 1.

46. 发明专利

JPH08227649A POWER DISTRIBUTION CIRCUIT BREAKER 失效
公开(公告)号：JPH08227649A
公开(公告)日：1996-09-03
申请号：JP3336795
申请日：1995-02-22
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWAMI EIJI , INOUE HIROMICHI
IPC分类号： H01H83/02 , H01H83/14 , H02H3/32
摘要： PURPOSE: To provide a circuit breaker having a function as an ordinary power distribution circuit breaker and a current limiter via the application of simple constitution by providing a control means with a control section for outputting a trip signal, when the sum of detected current vectors reaches a prescribed level. CONSTITUTION: A control section 10 receives a prescribed level of a signal corresponding to the first rated breaking current from the characteristic memory section 8 of a memory section 7, on the basis of an input signal from a variable means 2, and outputs a trip signal to an open/close drive means 12, when current detected with a current detection means 1 is equal to or above the rated breaking current and continues longer than the preset time. Also, a control section 11 receives the prescribed level of a signal corresponding to the second rated breaking current from the characteristic memory section 9 of the memory section 7, on the basis of an input signal from a variable means 3. When the sum of two current vectors detected with the means 1 is equal to or above the second rated breaking current and continues longer than the preset time for the value thereof, the section 11 outputs a trip signal to the means 12. According to this construction, a circuit breaker with the function of a current limiter can be provided.

47. 发明专利

JPH08153455A CIRCUIT BREAKER 失效
公开(公告)号：JPH08153455A
公开(公告)日：1996-06-11
申请号：JP29354594
申请日：1994-11-28
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWAMI EIJI
IPC分类号： G01R31/327 , G01R31/333 , H01H83/14
摘要： PURPOSE: To inspect the unbalanced state of currents without requiring much time by providing a current detecting part for detecting current values of both voltage lines of single-phase three wires, respectively, and an output part for outputting the current-carrying states detected by the respective current detecting parts. CONSTITUTION: When the currents carried to both voltage lines L1 , L2 are detected by both current detecting parts 2a, 2b of a current detecting part 2, the detected current values are amplified by a detection signal amplifying circuit 3a, respectively. The unbalance judging circuit 3b of a judging part 3 calculates the effective current values of the respective currents carried to both the voltage lines L1 , L2 on the basis of the amplified detected current values transmitted by an amplified signal input line 3c, and calculates the unbalance degree from the effective current values to judge whether the currents are in an unbalanced state or not. When the unbalanced state is judged by the circuit 3b, a signal showing the unbalanced state is transmitted to indicators 41a, 41b to light a LED.

48. 发明专利

JPH065188A MONITOR FOR CIRCUIT BREAKER 失效
公开(公告)号：JPH065188A
公开(公告)日：1994-01-14
申请号：JP16287592
申请日：1992-06-22
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWAMI EIJI , MATSUDA JUNICHI
IPC分类号： H01H71/04 , H01H71/46
摘要： PURPOSE:To reduce the number of terminals without hindering the outward transmission function of an alarm switch and an auxiliary switch, and improve the workability, and prevent miswiring. CONSTITUTION:A common terminal 3 is connected to a common contact c1 of a first change-over switch 1, and a trip terminal 4 is connected to a second contact b1 to be turned on at the time of trip. A first contact a1, which is turned on under the normal condition that the trip is not generated, is connected to a common contact C2 of a second change-over switch 2, and an OFF-terminal 5 is connected to a first contact a2, which is turned on when a main contact of a circuit breaker is turned off. An ON-terminal 6 is connected to a second contact b2, which is turned on when the main contact of the circuit breaker is tuned on. The first change-over switch 1 and the second change-over switch 2 are connected in series by connecting the first contact a1 of the first change- over switch 1 and a common contact c2 of the second change-over switch 2.

49. 发明专利

JP2001272424A WATT-HOUR METER 失效
公开(公告)号：JP2001272424A
公开(公告)日：2001-10-05
申请号：JP2000087456
申请日：2000-03-27
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： IWAMI EIJI , KUNIMOTO YOICHI , SHIOKAWA AKEMI
IPC分类号： G01R21/08
摘要： PROBLEM TO BE SOLVED: To provide a watt-hour meter in which the replacement of components is not required. SOLUTION: The watt-hour meter is provided with a multiplication part 2 which is driven according to electric power. The meter is provided with drive parts 3, 4 which drive the multiplication part by the input of a voltage and by the input of a current. The part 2 is constituted of a conductive fluid which is housed in a tube material 1 so as to be movable in its hollow part.

50. 发明专利

JP2001045652A ARC DETECTOR 失效
公开(公告)号：JP2001045652A
公开(公告)日：2001-02-16
申请号：JP21749999
申请日：1999-07-30
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SHIOKAWA AKEMI , IWAMI EIJI , KUNIMOTO YOICHI , TADASAWA TAKAAKI
IPC分类号： G01R31/02 , H01H83/20 , H02H3/50
摘要： PROBLEM TO BE SOLVED: To shut down a cable run for fire prevention by monitoring voltage between lines of receptacles for the detection of a short circuit resulting in arc discharge, and discriminating a voltage waveform in normal operation from the one at the time of an arc short circuit. SOLUTION: An arc detector 1 is disposed on a receptacle, and a breaker 4, a voltage detecting line, and a power circuit 5 are connected. The power circuit 5 has a sufficient capacity to output stable voltage to the arc detector 1 even if an arc short circuit occurs. Test buttons 2-5 are switches for verifying the operation of the arc detector 1 for dividing power supply voltage by means of a test voltage divider, and applying the voltage lower than the power voltage to a filter 2-1. The filter 2-1 removes high frequency noise from the power voltage. The noises are superimposed on a house-wiring, and removed by filters to increase the circuit protection and detection precision of the arc detector 1. It is thus possible to detect and protect the arc short circuit, and the serial arc of the house-wiring on the downstream side of the receptacle.

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