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41. 发明专利

JPH10502487A 失效
公开(公告)号：JPH10502487A
公开(公告)日：1998-03-03
申请号：JP50373896
申请日：1995-06-30
申请人： GREENBROOK ELECTRICAL PLC
IPC分类号： H01H83/04 , H01H9/16 , H01H57/00 , H01H71/00 , H01H71/04 , H01H71/12 , H01H71/58 , H01H73/44

42. 实用新型

JP2532363Y2 失效
公开(公告)号：JP2532363Y2
公开(公告)日：1997-04-16
申请号：JP3978491
申请日：1991-03-12
IPC分类号： H01H83/04 , H01H47/00 , H02H3/05

43. 发明专利

JPH0961481A LEAKAGE CURRENT MEASURING APPARATUS 失效
公开(公告)号：JPH0961481A
公开(公告)日：1997-03-07
申请号：JP23759495
申请日：1995-08-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUJII TOMOHIRO , MISHIMA KENSHICHIRO , KONDO HIROYUKI
IPC分类号： G01R31/00 , H01H69/01 , H01H83/04
摘要： PROBLEM TO BE SOLVED: To enable easy judgment of whether a leak detector is operating normally or not by providing a means to hold an instantaneous leakage current value as maximum value when the leak detector outputs a detection signal. SOLUTION: When a leak detector 3 detects a leakage current, a signal is outputted from an external output 4, and the value of the leakage current measured by a measuring section 2-1 is held as maximum value by a maximum value holding means 2-2. Therefore, this maximum value is an instantaneous leakage current value when the leak detector 3 is starts to work. A display means 2-3 displays the instantaneous leakage current value and the maximum value. When the leak detector 3 starts to work, a person in charge of inspection reads the maximum value from the display means 2-3 and compares the value with an action sensitivity value of the leak detector 3. When the value is smaller than the action sensitivity value, the person in charge can judge that the leak detector 3 malfunctions. When the value is larger than the action sensitivity value, he can judge that the leak detector 3 operates normally and also can learn the state of leakage by reading the instantaneous leakage current value.

44. 发明专利

JPH0917320A REGULATING DEVICE OF LEAK TESTING MOVABLE PLATE IN EARTH LEAKAGE BREAKER 失效
公开(公告)号：JPH0917320A
公开(公告)日：1997-01-17
申请号：JP33494595
申请日：1995-12-22
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： YAMAGISHI MASAHIRO , FUJIOGI HIROSHI , YASUDA MAKOTO , MATSUI YASUSHI
IPC分类号： H01H83/04 , H01H73/06 , H01H9/20
摘要： PROBLEM TO BE SOLVED: To prevent breaking of a leak testing movable plate, and easily and reliably install a cover on a body of a housing when a leak testing button is installed after an internal mechanism of an earth leakage breaker is housed in the housing. SOLUTION: A projection 6 having a straight-shaped surface 6' is arranged on an inner wall of a body 2 of a housing 1, and the vicinity of the free end (x) of a leak testing movable plate 4 is supported with an upper corner part 7 of the straight-shaped surface 6' of the projection 6 according to a deflecting quantity of the leak testing movable plate 4. In a condition where a cover 3 is installed on the body 2, the upper corner part 7 of the straight-shaped surface 6' of the projection 6 supports the vicinity of the free end (x) of the leak testing movable plate, and regulates a position of the leak testing movable plate 4.

45. 发明专利

JPH08161997A CIRCUIT BREAKER 失效
公开(公告)号：JPH08161997A
公开(公告)日：1996-06-21
申请号：JP33118494
申请日：1994-12-07
申请人： KAWAMURA ELECTRIC INC
发明人： HIGAKI KEIYA
IPC分类号： H01H83/02 , H01H83/04 , H01H83/14
摘要： PURPOSE: To provide a circuit breaker in which a test circuit surely operates while being inversely connected and an electromagnetic device is not burned and damaged even if a test button is kept pressed and which secures desired reliability without increasing the number of part items and its manufacturing cost. CONSTITUTION: This circuit breaker 1 is equipped with a zero-phase current transformer which detects zero-phase current, an amplifier for amplifying the secondary outputs of the zero-phase current transformer, an electromagnet device 4 that drives a plunger 3 by means of the amplifier, a return spring 5 which allows the plunger 3 to return, a display device 6 which displays any failure in conjunction with the operation of the electromagnet device 4, and a switching mechanism 7 which turns on and off current to a main circuit. The display device 6 has a display button 6a via which the occurrence of any failure is displayed interlocking with the electromagnet device 4, and the display button 6a is energized upward by the arm of the return spring 5 which is locked to the plunger 3. A test switch is provided in a test circuit 8 and comprises a movable contact plate 9, a fixed contact plate 10 opposite to the movable contact plate 9, and a test button 11 for pressing the movable contact plate 9.

46. 发明专利

JPH08148073A CIRCUIT BREAKER 失效
公开(公告)号：JPH08148073A
公开(公告)日：1996-06-07
申请号：JP28390094
申请日：1994-11-18
申请人： TOSHIBA CORP
发明人： OMOTO KAZUHIRO
IPC分类号： H01H73/00 , H01H83/04
摘要： PURPOSE: To provide a test circuit of simple constitution for a circuit breaker used in a single-phase three-wire distribution line and provided with a neutral line open phase protecting function. CONSTITUTION: In an open phase protecting circuit 13 of a circuit breaker 6 used in a single-phase three-wire distribution line, abnormal voltage generated by an open phase of an N-phase (neutral line) is detected in a detecting circuit 11, and when decided generating abnormal voltage by comparing the detection voltage with the reference voltage Vs, a control signal is outputted to a thyristor 8 to actuate a trip device 4, so as to open a main circuit contact 3 separated. In the case of performing a test of this neutral line open phase protecting action, by a test circuit 15, abnormal voltage is applied simulatively relating to the open phase protecting circuit 13, to confirm the action.

47. 发明专利

JPH08138521A EARTH-LEAKAGE CIRCUIT BREAKER 失效
公开(公告)号：JPH08138521A
公开(公告)日：1996-05-31
申请号：JP28102594
申请日：1994-11-15
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： KITAMURA TAKASHI , YOKOYAMA YOICHI , KUNIMOTO YOICHI , SAWADA TOMOYUKI , KONISHI YOJI
IPC分类号： H01H83/04
摘要： PURPOSE: To properly turn off a test switch after breaking a main cable way. CONSTITUTION: A zero-phase current transformer 92 has a main cable way between a power source and a load as a primary side, and the unbalance of current flowing therein is detected via secondary output, thereby actuating an electromagnetic device 100. This device 100 drives an open/close device via an interlocking lever 103, and causes a moving contactor 33y held on a moving body to part. Also, a test switch 93 has a moving piece 142a coming in contact with a contactor plate 141 under a pressing force from a pushbutton 143, and causes the current transformer 92 to generate secondary output, thereby actuating the device 100. Furthermore, a moving body 121 has a positional restriction projection 121i, and separates the piece 142a from the plate 141, upon departure of the contactor 33y. The projection piece 212i comes in contact with the piece 142a between the position where the pressing force of the pushbutton 143 acts and another position faced to the plate 141.

48. 发明专利

JPH08106844A REMOTE TEST DEVICE FOR EARTH LEAKAGE BREAKER 失效
公开(公告)号：JPH08106844A
公开(公告)日：1996-04-23
申请号：JP24169594
申请日：1994-10-05
申请人： MITSUBISHI ELECTRIC CORP
发明人： TSUKAMOTO TATSUYUKI , ISHII KAZUHIRO
IPC分类号： H01H83/02 , H01H83/04
摘要： PURPOSE: To ensure the safety in the operation of a remote test switch by electrically insulating the input side and output side of a remote test device from each other. CONSTITUTION: A remote test switch H is closed to apply the AC or DC voltage V1 from an external control power source 14 to the input side terminals J1, J2 of a remote test device, the operation coil 6a of a relay 6 is excited to close a normally opened contact 6b. Since the leakage test circuits B1, B2 of an earth leakage breaker 11 are short-circuited thereby, a leakage test operation can be remotely performed. According to such a constitution, since the terminals B1, B2 of the leakage test circuit are insulated from the input side terminals J1, J2 of the remote test device in the relay 6, no cable run voltage is directly applied to the remote test switch H, and the safety at operation can be kept.

49. 发明专利

JPH07220614A TEST CIRCUIT FOR EARTH LEAKAGE BREAKER 失效
公开(公告)号：JPH07220614A
公开(公告)日：1995-08-18
申请号：JP3300094
申请日：1994-02-04
申请人： KAWAMURA DENKI SANGYO
发明人： YOSHIDA ATSUSHI
IPC分类号： H01H83/02 , H01H83/04
摘要： PURPOSE:To provide a highly reliable test circuit for an earth leakage breaker, in which the inner structure is simplified and there is no restriction on arrangement of parts, by providing specific constitution for the test circuit of an earth leakage breaker for the purpose of checking that the breaker breaks the main circuit normally at occurrence of any leak current. CONSTITUTION:This test circuit is provided with first and second switching elements (example: a photothyristor 3 and a TRIAC 4) for generating a pseudo leak current in a test circuit 1 by the operation of the test switch 2 of the test circuit 1, and a time limiting circuit 7 composed of third and fourth switching elements (example: PUT 5 and a thyristor 6). Hereby, the inside structure of the earth leakage breaker is simplified, and there is no restriction on arrangement of parts, and even in the case that it is placed in reverse connection, the test resistor does not heat abnormally, and its reliability improves, too.

50. 实用新型

JPH0735282Y2 失效
公开(公告)号：JPH0735282Y2
公开(公告)日：1995-08-09
申请号：JP5726087
申请日：1987-04-14
IPC分类号： G01R31/02 , G01R15/18 , H01H83/02 , H01H83/04

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