WO2013073103A1 - 漏電遮断器 - Google Patents

漏電遮断器 Download PDF

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Publication number
WO2013073103A1
WO2013073103A1 PCT/JP2012/006583 JP2012006583W WO2013073103A1 WO 2013073103 A1 WO2013073103 A1 WO 2013073103A1 JP 2012006583 W JP2012006583 W JP 2012006583W WO 2013073103 A1 WO2013073103 A1 WO 2013073103A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
printed circuit
leakage
earth
contact
Prior art date
Application number
PCT/JP2012/006583
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
善明 川嶋
洋平 細岡
Original Assignee
富士電機機器制御株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士電機機器制御株式会社 filed Critical 富士電機機器制御株式会社
Priority to CN201280048571.1A priority Critical patent/CN103843101B/zh
Publication of WO2013073103A1 publication Critical patent/WO2013073103A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber

Definitions

  • the present invention relates to an earth leakage breaker provided with an earth leakage test circuit.
  • the earth leakage breaker of Patent Document 1 includes a main circuit contact, a contact switching mechanism, a zero-phase current transformer interposed in the main circuit, an earth leakage trip device, an arc extinguishing device, an earth leakage detection circuit, and a case main body. It houses a printed circuit board on which circuit components of the leakage test circuit are mounted, a push button type test switch connected to the leakage test circuit, and the like.
  • FIG. 7 shows the structure around the pushbutton test switch of the earth leakage circuit breaker described in Patent Document 1, and a printed circuit board 2 is placed on the top of the zero-phase current transformer 1.
  • a cover 3 of the case main body is arranged on the upper part of the case.
  • An earth leakage trip device 4 is arranged in parallel to the zero-phase current transformer 1 while being located at the bottom of the printed circuit board 2.
  • a pair of test pin terminals of the zero-phase current transformer 1 protrude from the upper surface of the printed circuit board 2, and these pair of test pin terminals are fixed contacts 6 a and 6 b of the pair of test switches 5.
  • the cover 3 is provided with a push button 8 of the test switch 5 that is movable downward and retracted upward by the return spring 7.
  • a movable contact 9 that bridges the pair of fixed contacts 6a and 6b by movement is fixed.
  • an object of the present invention is to provide a leakage breaker capable of improving the insulating performance of a printed circuit board by preventing contact with arc gas.
  • an earth leakage breaker includes a main circuit contact, a contact opening / closing mechanism, a zero-phase current transformer interposed in the main circuit, an earth leakage A printed circuit board on which circuit components of a removal device, an arc extinguishing device, a leakage detection circuit and a leakage test circuit are mounted, and a push button type test switch connected to the leakage test circuit are incorporated, and the printed circuit board is arranged inside.
  • the internal unit is configured to shield the contact between the arc gas generated in the arc extinguishing device and stored in the case with the printed circuit board. According to the earth leakage breaker according to this embodiment, soot contained in the arc gas generated by the arc extinguishing device does not adhere to the circuit of the printed circuit board.
  • the earth leakage breaker includes a unit case in which the internal unit covers one surface side of the printed circuit board and opens on the other surface side of the printed circuit board.
  • a unit cover that detachably engages with an opening edge of the unit case and closes the inside of the unit, and the push button type test switch is provided on the other surface of the printed circuit board disposed in the unit case.
  • a fixed contact and a movable contact provided on a push button disposed on the unit cover and movable toward the fixed contact by a pressing operation of the push button are provided.
  • the button-type test switch is configured by the printed circuit board and the internal unit that accommodates the printed circuit board, the test switch can be downsized.
  • a pair of the fixed contacts are provided apart from each other on the other surface of the printed circuit board, and the movable contact of the push button A tip is provided so as to bridge between the pair of fixed contacts. According to the earth leakage circuit breaker according to this embodiment, a large insulation distance can be ensured even for a small internal unit having a small facing distance between the printed circuit board and the unit cover.
  • the movable contact that bridges between the pair of fixed contacts is a conductive plate that is elastically deformable. According to the earth leakage breaker according to this embodiment, even if the push button is pushed in with a strong force, the movable contact that contacts the pair of fixed contacts bends while being elastically deformed, and excessive stress is applied to the pair of fixed contacts. Don't join.
  • the internal unit in which the printed circuit board is disposed is housed in the case, and the contact between the arc gas generated by the arc extinguishing device and the printed circuit board is shielded by the internal unit. Therefore, soot contained in the arc gas generated by the arc extinguishing apparatus does not adhere to the circuit of the printed circuit board, and the insulating performance of the printed circuit board can be improved.
  • FIG. 1 is a cross-sectional view of an essential part showing an earth leakage breaker according to an embodiment of the present invention
  • FIG. 2 is a circuit diagram of the earth leakage breaker according to an embodiment
  • FIG. 4 is a figure which shows the state which removed the unit cover of the unit accommodated in the main body case.
  • the earth leakage breaker of the present embodiment includes a main circuit terminal 13 on the power source side, a main circuit terminal 14 on the load side, and a main circuit in a main body case 12 including a base 10 and a cover 11.
  • a fixed contact 15 and a movable contact 16 constituting the contact an operation handle 17 connected to an opening / closing mechanism (not shown), and a contact point between the fixed contact 15 and the movable contact 16 at the time of a blocking operation by the opening / closing mechanism.
  • An arc extinguishing device 18 that extinguishes the generated arc, a zero-phase current transformer 19, an overcurrent tripping device 20 (see FIG. 2), and an earth leakage tripping device 21 are incorporated.
  • the leakage test circuit 24 mounted on the printed circuit board 22 includes a test switch 25 and a current limiting resistor 26. It has.
  • the test switch 25 of FIG. 2 includes a pair of fixed contacts 27a and 27b and a movable contact 28 that bridges the pair of contacts 27a and 27b by moving the push button 35.
  • an internal unit 29 formed of an insulating material such as a synthetic resin material is accommodated in the upper portion of the zero-phase current transformer 19 inside the main body case 12.
  • the internal unit 29 includes a unit case 30 that holds the printed circuit board 22 and a unit cover 31 that is detachably engaged with the opening edge of the unit case 30 while facing the upper surface of the printed circuit board 22. Has been.
  • the unit case 30 includes side partition walls 30a to 30e formed around the periphery of the printed circuit board 22, and a side partition wall 30c so that only the upper part is opened as shown in FIG.
  • the bottom partition walls 30f to 30h are formed integrally with the lower part of 30 to 30e, and the printed circuit board 22 is in contact with and supported by the upper part of the bottom partition wall 30f.
  • a pair of pin terminals drawn out from the zero-phase current transformer 19 protrude toward the unit cover 31 with a predetermined interval.
  • the pair of pin terminals are a pair of fixed contacts 27a and 27b that constitute the test switch 25 described above.
  • the button cover 31 a is formed at a position corresponding to the button insertion hole 11 a formed in the cover 11 in the unit cover 31 engaged with the opening edge of the unit case 30.
  • the button holding portion 31a is a cylindrical portion that communicates vertically, and the push button 35 constituting the test switch 25 is directed toward the printed circuit board 22 in the button insertion hole 11a of the button holding portion 31a and the cover 11. It is mounted so that it can move.
  • An elastically deformable conductive plate facing the pair of fixed contacts 27a and 27b of the printed circuit board 22 is fixed to the end of the push button 35 protruding from the lower opening of the button holding portion 31a.
  • the plate is the movable contact 28 constituting the test switch 25 described above.
  • the push button 35 attached to the button holding portion 31a and the button insertion hole 11a includes the first coil spring 32 disposed between the movable contact 28 and the unit cover 31 having the same coil axis direction, and the unit cover 31. And the second coil spring 33 disposed between the push buttons 35 is urged in a direction away from the pair of fixed contacts 27a and 27b by the spring force of the second coil spring 33. It is held in contact with the lower surface of 31.
  • the distance (insulation distance) between the movable contact 28 in the standby state and the pair of fixed contacts 27a and 27b is set to H1 and H2.
  • the case according to the present invention corresponds to the main body case 12.
  • an earth leakage simulation current flows through the zero-phase current transformer 19, the earth leakage trip device 21 is activated by the secondary output of the zero-phase current transformer 19, and the earth leakage breaker is tripped to operate the main circuit contactor.
  • the stationary contact 15 and the movable contact 16 are opened.
  • the movable contact 28 that contacts the pair of fixed contacts 27a and 27b bends while being elastically deformed, so that excessive stress is applied to the pair of fixed contacts 27a and 27b. Don't join.
  • the effect of the earth leakage breaker of this embodiment is demonstrated.
  • the printed circuit board 22 is housed in the main body case 12 in a state of being sealed in the internal unit 29, so that the soot contained in the arc gas generated by the arc extinguishing device 18 is printed. It does not adhere to the circuit of the substrate 22. Therefore, the insulation performance of the printed circuit board can be improved.
  • the test switch 25 of the leakage test circuit 24 is provided with a pair of fixed contacts 27 a and 27 b on the printed circuit board 22, and the movable contact 28 is provided on the unit cover 31 side of the internal unit 29 that accommodates the printed circuit board 22. Since the structure is provided, the test switch 25 can be downsized.
  • the pair of fixed contacts 27a and 27b of the printed circuit board 22 are provided with the insulating distances H1 and H2 between the movable contact 28 provided on the unit cover 31 side, the printed circuit board 22 and Even a small internal unit 29 having a small facing distance to the unit cover 31 can ensure a large insulation distance of H1 + H2. Furthermore, even if the push button 35 is pushed in with a strong force, the movable contact 28 that contacts the pair of fixed contacts 27a and 27b bends while being elastically deformed, and an excessive stress is not applied to the pair of fixed contacts 27a and 27b. The durability of the test switch 25 can be improved.
  • the leakage breaker according to the present invention is useful for improving the insulation performance of the printed circuit board by preventing contact with the arc gas.

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PCT/JP2012/006583 2011-11-15 2012-10-15 漏電遮断器 WO2013073103A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201280048571.1A CN103843101B (zh) 2011-11-15 2012-10-15 漏电断路器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011249402A JP5866993B2 (ja) 2011-11-15 2011-11-15 漏電遮断器
JP2011-249402 2011-11-15

Publications (1)

Publication Number Publication Date
WO2013073103A1 true WO2013073103A1 (ja) 2013-05-23

Family

ID=48429208

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/006583 WO2013073103A1 (ja) 2011-11-15 2012-10-15 漏電遮断器

Country Status (3)

Country Link
JP (1) JP5866993B2 (zh)
CN (1) CN103843101B (zh)
WO (1) WO2013073103A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105702529B (zh) * 2016-04-28 2018-08-28 德力西电气有限公司 一种断路器漏电功能开关结构及具有其的漏电断路器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63259937A (ja) * 1987-04-15 1988-10-27 富士電機株式会社 漏電遮断器の零相変流器ユニツト
JPH07240142A (ja) * 1994-02-28 1995-09-12 Matsushita Electric Works Ltd 回路遮断器
JPH08138521A (ja) * 1994-11-15 1996-05-31 Matsushita Electric Works Ltd 漏電遮断器
JP2000003660A (ja) * 1998-06-15 2000-01-07 Fuji Electric Co Ltd 漏電しゃ断器
JP2000149757A (ja) * 1998-11-04 2000-05-30 Fuji Electric Co Ltd 漏電しゃ断器
JP2002231119A (ja) * 2001-01-26 2002-08-16 Fuji Electric Co Ltd 漏電しゃ断器の漏電検出回路モジュールおよびその製作方法
JP2003132779A (ja) * 2001-10-22 2003-05-09 Kawamura Electric Inc トラッキング対応遮断器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4893358B2 (ja) * 2007-02-19 2012-03-07 富士電機機器制御株式会社 漏電遮断器の漏電引外し装置
CN101996827B (zh) * 2009-08-28 2013-04-03 李文俊 一种具有漏电保护功能的双极均配有灭弧罩的断路器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63259937A (ja) * 1987-04-15 1988-10-27 富士電機株式会社 漏電遮断器の零相変流器ユニツト
JPH07240142A (ja) * 1994-02-28 1995-09-12 Matsushita Electric Works Ltd 回路遮断器
JPH08138521A (ja) * 1994-11-15 1996-05-31 Matsushita Electric Works Ltd 漏電遮断器
JP2000003660A (ja) * 1998-06-15 2000-01-07 Fuji Electric Co Ltd 漏電しゃ断器
JP2000149757A (ja) * 1998-11-04 2000-05-30 Fuji Electric Co Ltd 漏電しゃ断器
JP2002231119A (ja) * 2001-01-26 2002-08-16 Fuji Electric Co Ltd 漏電しゃ断器の漏電検出回路モジュールおよびその製作方法
JP2003132779A (ja) * 2001-10-22 2003-05-09 Kawamura Electric Inc トラッキング対応遮断器

Also Published As

Publication number Publication date
JP5866993B2 (ja) 2016-02-24
CN103843101B (zh) 2016-06-08
JP2013105644A (ja) 2013-05-30
CN103843101A (zh) 2014-06-04

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