EP4089710B1 - Current leakage protection apparatus of 2p2m electromagnetic residual current circuit breaker with overcurrent protection - Google Patents

Current leakage protection apparatus of 2p2m electromagnetic residual current circuit breaker with overcurrent protection Download PDF

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Publication number
EP4089710B1
EP4089710B1 EP21844614.4A EP21844614A EP4089710B1 EP 4089710 B1 EP4089710 B1 EP 4089710B1 EP 21844614 A EP21844614 A EP 21844614A EP 4089710 B1 EP4089710 B1 EP 4089710B1
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EP
European Patent Office
Prior art keywords
current leakage
housing
test
transmission rod
torsion spring
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP21844614.4A
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German (de)
English (en)
French (fr)
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EP4089710A1 (en
EP4089710A4 (en
EP4089710C0 (en
Inventor
Feng Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Etman Electric Changzhou Co Ltd
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Etman Electric Changzhou Co Ltd
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Publication date
Application filed by Etman Electric Changzhou Co Ltd filed Critical Etman Electric Changzhou Co Ltd
Publication of EP4089710A1 publication Critical patent/EP4089710A1/en
Publication of EP4089710A4 publication Critical patent/EP4089710A4/en
Application granted granted Critical
Publication of EP4089710B1 publication Critical patent/EP4089710B1/en
Publication of EP4089710C0 publication Critical patent/EP4089710C0/en
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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
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • 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
    • H01H2083/045—Auxiliary switch opening testing circuit in synchronism with the main circuit

Definitions

  • the present invention relates to the technical field of circuit breakers, and specifically, to a current leakage protection apparatus of a 2P2M electromagnetic residual current circuit breaker with overcurrent protection (RCBO).
  • RCBO overcurrent protection
  • a current leakage protection apparatus of a 2P2M electromagnetic residual current circuit breaker with overcurrent protection comprising a housing, wherein a current leakage tripping action mechanism and a test circuit mechanism are disposed in the housing;
  • the test circuit mechanism comprises a conductivity test torsion spring, comprising a hinging and linking shaft being hinged to a middle part of the conductivity test torsion spring, and one end of the hinging and linking shaft is fixed to the housing, comprising a test button being movably embedded in an upper part of the housing, one end of the conductivity test torsion spring extends towards the test button and abuts against the test button, comprising a test resistor is disposed under the test button on the housing, and the conductivity test torsion spring being intermittently conductively connected to the test resistor through the test button is known from WO2014/167603 .
  • RCBO also called earth leakage circuit breaker or ground fault circuit interrupter
  • the RCBO is mainly used to protect a person in danger when current leakage occurs in a device, and may be used to protect a line or a motor to avoid overload or short circuit, or may be used in normal cases when a line is infrequently converted and started.
  • the RCBO usually includes a housing.
  • a circuit breaker apparatus and a current leakage protection apparatus are distributed in the housing.
  • the circuit breaker apparatus is used to control connection or disconnection of a movable contact and a fixed contact when short circuit or overload occurs or a line is infrequently started.
  • the current leakage protection apparatus is used to control the connection or disconnection of the movable contact and the fixed contact when current leakage occurs.
  • the current leakage protection apparatus is used to control a latch to perform tripping when current leakage occurs.
  • the current leakage protection apparatus in the prior art includes a housing.
  • a control board, a current leakage tripping action mechanism and a test circuit mechanism are disposed in the housing.
  • the test circuit mechanism is mainly used to simulate current leakage to check whether on or off of the circuit breaker is normal.
  • test circuit module in the prior art usually adopts multiple test springs and test resistors, and these components are tiled in the housing.
  • mounting and placement of the current leakage tripping action mechanism need to be considered, so that the overall structure of the current leakage protection apparatus is complicated and there are lots of components. Consequently, layout and assembly are complicated.
  • the present invention provides a current leakage protection apparatus of a 2P2M electromagnetic RCBO, to improve a structure of a test circuit.
  • the structure is simple and there are a small quantity of components. In this way, mounting space and costs are reduced, and it's easier for workers to perform overall assembly.
  • a current leakage protection apparatus of a 2P2M electromagnetic RCBO including a housing, where a current leakage tripping action mechanism and a test circuit mechanism are disposed in the housing;
  • the test circuit mechanism includes a conductivity test torsion spring;
  • a hinging and linking shaft is hinged to the middle part of the conductivity test torsion spring, and one end of the hinging and linking shaft is fixed to the housing;
  • a test button is movably embedded in an upper part of the housing; one end of the conductivity test torsion spring extends towards the test button and abuts against the test button;
  • the housing is provided with a linkage hole in a direction of a movable contact of the circuit breaker;
  • the other end of the conductivity test torsion spring opposite to the end abutting against the test button is embedded in the linkage hole and extends towards an outer side of the linkage hole;
  • a test resistor is disposed under the test button on the housing, and the conduct
  • the structure of the test circuit is improved.
  • the test resistor may be intermittently connected to the circuit breaker module through merely the conductivity test torsion spring, so that the structure is simple and there is a small quantity of components. In this way, mounting space and costs are reduced, and it's easier for workers to perform the overall assembly.
  • there is no welding point in the foregoing test circuit so that compared with the prior art in which welding is required, the processing is simplified and the manufacturing period is shortened.
  • the foregoing current leakage protection apparatus of a 2P2M electromagnetic RCBO may further be set as follows.
  • a latching position that configured to guide the conductivity test torsion spring is disposed between the test button and the hinging and linking shaft on the housing.
  • the conductivity test torsion spring may be limited by disposing the latching position, to prevent the conductivity test torsion spring from displacement, thereby improving work stability of the conductivity test torsion spring.
  • the foregoing current leakage protection apparatus of a 2P2M electromagnetic RCBO may further be set as follows.
  • the periphery of the hinging and linking shaft is provided with an anti-sliding protrusion along an axial direction of the hinging and linking shaft.
  • the anti-sliding protrusion may increase friction between the conductivity test torsion spring and the hinging and linking shaft, to prevent the conductivity test torsion spring from being separated from the hinging and linking shaft.
  • the foregoing current leakage protection apparatus of a 2P2M electromagnetic RCBO may further be set as follows.
  • a mounting position for mounting the test resistor in a concealed way is disposed under the test button on the housing, and a support frame configured to fix and support a lead of the test resistor is disposed at an end of the mounting position on the housing.
  • the mounting position is disposed to mount the test resistor on the housing in a concealed way, so that space is properly used and overall layout of the current leakage protection apparatus is simple.
  • the support frame is further disposed to fix a lead end of the test resistor, so that when the test button is pressed, the conductivity test torsion spring may be conductively connected to the test resistor accurately.
  • the foregoing current leakage protection apparatus of a 2P2M electromagnetic RCBO may further be set as follows.
  • the current leakage tripping action mechanism includes a current leakage tripping device mounted in the housing and a first transmission rod with one end intermittently linked to a side of the current leakage tripping device; the middle part of the first transmission rod is movably hinged to the housing, and one end of the first transmission rod adjacent to the current leakage tripping device abuts against and is linked to a second transmission rod; one end of the second transmission rod is hinged to the housing, and the other end of the second transmission rod abuts against and is linked to a third transmission rod; the middle part of the third transmission rod is hinged to the housing, a current leakage tripping rod is coaxially hinged to a position where the third transmission rod is hinged to the housing, and the other end of the third transmission rod opposite to the end linked to the second transmission rod is linked to the current leakage tripping rod; the current leakage tripping rod is linked
  • the foregoing current leakage protection apparatus of a 2P2M electromagnetic RCBO may further be set as follows.
  • a flexible connection assembly is disposed between the current leakage tripping device and the third transmission rod.
  • the flexible connection assembly is disposed, so that the current leakage tripping device and the third transmission rod adaptively rotate under the joint action of each other, to transform a rigid connection into a flexible connection. In this way, friction is reduced, and work fluency is better and there is no abnormal sound.
  • the foregoing current leakage protection apparatus of a 2P2M electromagnetic RCBO may further be set as follows.
  • the flexible connection assembly includes a spring with two ends oppositely fixed to the current leakage tripping rod and the third transmission rod, respectively.
  • the spring is disposed, so that the current leakage tripping device and the third transmission rod adaptively rotate under the joint action of each other, to transform a rigid connection into a flexible connection. In this way, friction is reduced, and work fluency is better and there is no abnormal sound.
  • a current leakage protection apparatus of a 2P2M electromagnetic RCBO shown in FIG. 1 to FIG. 3 includes a housing 1.
  • a current leakage tripping action mechanism and a test circuit mechanism are disposed in the housing 1.
  • the test circuit mechanism includes a conductivity test torsion spring 2.
  • a hinging and linking shaft 3 is hinged to the middle part of the conductivity test torsion spring 2.
  • One end of the hinging and linking shaft 3 is fixed to the housing 1.
  • a test button 4 is movably embedded in an upper part of the housing 1.
  • One end of the conductivity test torsion spring 2 extends towards the test button 4 and abuts against the test button 4.
  • the housing 1 is provided with a linkage hole 5 in a direction of a movable contact of the circuit breaker.
  • the other end of the conductivity test torsion spring 2 opposite to the end abutting against the test button 4 is embedded in the linkage hole 5 and extends towards an outer side of the linkage hole 5.
  • a test resistor 6 is disposed under the test button 4 on the housing 1.
  • the conductivity test torsion spring 2 is intermittently conductively connected to the test resistor 6 through the test button 4.
  • a latching position 7 that configured to guide the conductivity test torsion spring 2 is disposed between the test button 4 and the hinging and linking shaft 3 on the housing 1.
  • the periphery of the hinging and linking shaft 3 is provided with an anti-sliding protrusion 31 along an axial direction of the hinging and linking shaft 3.
  • a mounting position 8 for mounting the test resistor 6 in a concealed way is disposed under the test button 4 on the housing 1.
  • a support frame 9 configured to fix and support a lead of the test resistor 6 is disposed at an end of the mounting position 8 on the housing 1.
  • test button 4 is pressed, so that one end of the conductivity test torsion spring 2 contacts with a lead end of the test resistor 6. Because the other end of the conductivity test torsion spring 2 is conductively connected to the circuit breaker apparatus, the test circuit is on.
  • the test resistor 6 is intermittently connected to the circuit breaker module through merely the conductivity test torsion spring 2, so that the structure is simple and there are a small quantity of components. In this way, mounting space and costs are reduced, and it's easier for workers to perform overall assembly.
  • the current leakage tripping action mechanism includes a current leakage tripping device 10 mounted in the housing 1 and a first transmission rod 11 with one end intermittently linked to a side of the current leakage tripping device 10.
  • the middle part of the first transmission rod 11 is movably hinged to the housing 1.
  • An end of the first transmission rod 11 adjacent to the current leakage tripping device 10 abuts against and is linked to a second transmission rod 12.
  • One end of the second transmission rod 12 is hinged to the housing 1, and the other end of the second transmission rod 12 abuts against and is linked to a third transmission rod 13.
  • the middle part of the third transmission rod 13 is hinged to the housing 1.
  • a current leakage tripping rod 14 is coaxially hinged to a position where the third transmission rod 13 is hinged to the housing 1.
  • the other end of the third transmission rod 13 opposite to the end linked to the second transmission rod 12 is linked to the current leakage tripping rod 14.
  • the current leakage tripping rod 14 is linked to a current leakage reset torsion spring 15.
  • Two ends of the current leakage reset torsion spring 15 respectively abut against the current leakage tripping rod 14 and the first transmission rod 11.
  • the other end of the current leakage tripping rod 14 opposite to the end linked with the first transmission rod 11 is linked to a current leakage operation handle 16.
  • a flexible connection assembly is disposed between the current leakage tripping device 10 and the third transmission rod 13.
  • the flexible connection assembly includes a spring 17 with two ends oppositely fixed to the current leakage tripping rod 14 and the third transmission rod 13, respectively.
  • the current leakage tripping device 10 drives the first transmission rod 11, and the first transmission rod 11 drives the second transmission rod 12 to rotate around a hinge axis of the second transmission rod 12. Further, an end of the second transmission rod 12 pushes the third transmission rod 13.
  • the third transmission rod 13 presses the current leakage tripping rod 14 through the spring 17, and the current leakage tripping rod 14 drives the circuit breaker apparatus, so that power is off (where the current leakage reset torsion spring 15 rotates, so that a current leakage flexible linkage block is tripped, and the current leakage tripping rod resets under action of the reset spring, to toggle the first push pole, so that power is off).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
EP21844614.4A 2021-03-31 2021-08-27 Current leakage protection apparatus of 2p2m electromagnetic residual current circuit breaker with overcurrent protection Active EP4089710B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202120662133.0U CN214542079U (zh) 2021-03-31 2021-03-31 一种2p2模数电磁式漏电保护断路器的漏电保护装置
PCT/CN2021/114979 WO2022205759A1 (zh) 2021-03-31 2021-08-27 一种2p2模数电磁式漏电保护断路器的漏电保护装置

Publications (4)

Publication Number Publication Date
EP4089710A1 EP4089710A1 (en) 2022-11-16
EP4089710A4 EP4089710A4 (en) 2022-11-16
EP4089710B1 true EP4089710B1 (en) 2023-10-18
EP4089710C0 EP4089710C0 (en) 2023-10-18

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ID=78265736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21844614.4A Active EP4089710B1 (en) 2021-03-31 2021-08-27 Current leakage protection apparatus of 2p2m electromagnetic residual current circuit breaker with overcurrent protection

Country Status (3)

Country Link
EP (1) EP4089710B1 (zh)
CN (1) CN214542079U (zh)
WO (1) WO2022205759A1 (zh)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3120065A1 (de) * 1981-05-20 1982-12-23 Hettich Hetal Werke Moebelscharnier
AT384907B (de) * 1985-12-02 1988-01-25 Felten & Guilleaume Ag Oester Fehlerstrom- und leitungsschutzschalter
TWI426189B (zh) * 2010-10-19 2014-02-11 First Dome Corp And has a light thrust and high elastic force of the relative displacement device
WO2014167603A1 (ja) * 2013-04-11 2014-10-16 パナソニック 株式会社 動作表示機構、回路遮断器、複合遮断器、及び表示部材
CN203787366U (zh) * 2013-12-04 2014-08-20 浙江正泰电器股份有限公司 漏电断路器
CN207165502U (zh) * 2017-09-08 2018-03-30 乐清市也为电气有限公司 一种漏电断路器
CN207264994U (zh) * 2017-10-16 2018-04-20 浙江凯发电气有限公司 一种小型漏电断路器的试验按钮装置
CN209544274U (zh) * 2018-11-30 2019-10-25 浙江正泰电器股份有限公司 断路器
CN111128616A (zh) * 2020-01-07 2020-05-08 上海电器科学研究所（集团）有限公司 一种小型断路器的操作机构
CN111640628B (zh) * 2020-05-21 2022-07-12 温州金旭电气有限公司 一种微型漏电断路器
CN112951665A (zh) * 2021-03-31 2021-06-11 英特曼电工（常州）有限公司 一种2p2模数电磁式漏电保护断路器

Also Published As

Publication number Publication date
EP4089710A1 (en) 2022-11-16
CN214542079U (zh) 2021-10-29
EP4089710A4 (en) 2022-11-16
EP4089710C0 (en) 2023-10-18
WO2022205759A1 (zh) 2022-10-06

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