EP0386768A2 - Schaltvorrichtung mit Abschalt- und Fehlerstrom erkennenden Funktionen - Google Patents

Schaltvorrichtung mit Abschalt- und Fehlerstrom erkennenden Funktionen Download PDF

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Publication number
EP0386768A2
EP0386768A2 EP90104459A EP90104459A EP0386768A2 EP 0386768 A2 EP0386768 A2 EP 0386768A2 EP 90104459 A EP90104459 A EP 90104459A EP 90104459 A EP90104459 A EP 90104459A EP 0386768 A2 EP0386768 A2 EP 0386768A2
Authority
EP
European Patent Office
Prior art keywords
leakage
casing
contact
relay
circuit
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.)
Withdrawn
Application number
EP90104459A
Other languages
English (en)
French (fr)
Other versions
EP0386768A3 (de
Inventor
Shigeru Matsumoto
Eiichi Sato
Toshihiro Akiyama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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
Priority claimed from JP5853089A external-priority patent/JPH02239533A/ja
Priority claimed from JP6021489A external-priority patent/JPH02239535A/ja
Priority claimed from JP6021389A external-priority patent/JPH02239534A/ja
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP0386768A2 publication Critical patent/EP0386768A2/de
Publication of EP0386768A3 publication Critical patent/EP0386768A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/12—Means for indicating condition of the switch
    • H01H73/14—Indicating lamp structurally associated with the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1054—Means for avoiding unauthorised release
    • 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

Definitions

  • the present invention relates to an improvement in a circuit device which is suitable for use in a circuit having a critical load which should not be cut off from a power source at leakage current levels not likely to result in significant damage.
  • the present invention relates particularly to a molded case circuit breaker with provision for a leakage current alarm and having a particularly advantageous arrangement of indicators and switch actuators.
  • a circuit breaker has been used in combination with a zero-­current transformer and a leakage relay.
  • the leakage current in the circuit is constantly monitored by the leakage relay, and in case of an occurrence of a tolerable leakage in the circuit, only a leakage alarm is issued without breaking the power circuit.
  • the circuit breaker cuts out or interrupts the power circuit when a definite overcurrent or short circuit condition occurs.
  • the object of the present invention is to provide an improved circuit device which provides a circuit breaking function and a leakage alarm yet requires only a small mounting space in and a small mounting area on a switchboard.
  • a circuit device comprising: a casing; a circuit breaker part contained in the casing and including at least a fixed contact, at least a moving contact which is movable to make and break contact with the fixed contact, a contact driving mechanism for driving the movable contact, a trip mechanism for tripping the contact driving mechanism in response to a predetermined current state such as an overload current or a short circuit condition, and a handle connected to the contact driving mechanism for manually driving the contact driving mechanism, a zero-phase current transformer contained in the casing for detecting a leakage current and for generating an output signal indicative of detected leakage current, and a leakage relay contained in the casing for issuing a leakage alarm signal on the basis of the output signal of the zero-phase current transformer.
  • the leakage relay is mounted at a location in the casing sufficiently separated from a location of the circuit breaker part to isolate the leakage relay from mechanical shock or magnetic flux caused by the circuit breaker part.
  • a further technical advantage of the circuit device in accordance with the present invention is achieved by a circuit which has been set forth above and further wherein the leakage relay is mounted in a shield casing which is held by a fixing frame of magnetically soft (low coercivity) material.
  • a still further technical advantage of the circuit breaker in accordance with the present invention is achieved by a circuit device with a leakage current detection function which has been set forth above and further comprises: a leakage current indicator for indicating detection of the leakage current by energization of the leakage relay, a reset button for resetting energization state of the leakage relay, and a test button for simulatingly forming a testing circuit thereby to check function of leakage detection operation of the leakage relay, the leakage current indicator, the reset button and the test button being disposed in the neighborhood of each other and of the handle, on a face panel on a top face of the casing.
  • a casing 2 comprises a base part 2a and a cover part 2b.
  • the base part 2a comprises a circuit breaker part of a known configuration including fixed contacts 15 provided on fixed conductor 151, a moving contact 14 provided on moving conductor 141, arc suppressing devices 16, a contact driving mechanism 41, a known trip mechanism 35, 36 (shown schematically in FIG. 2) for tripping the contact driving mechanism in response to an overload current state or a short circuit to break the circuit, and a handle 4 connected to the contact driving mechanism 41 for manually driving the contact driving mechanism.
  • the base part 2a further comprises input side terminals 5 and output side terminals 6 at the input side and the load side, respectively.
  • the base part 2a further comprises a leakage relay 22, an amplifier 9 and a zero-phase current transformer 7.
  • the leakage relay 22 is disposed at a location which is sufficiently removed from the location of the circuit breaker part to avoid electrical and mechanical interference from the circuit breaker part.
  • the circuit breaker part comprises the moving contact 14 provided on the moving conductor, the fixed contact 15 provided on the fixed conductor, an arc runner 17 and the driving mechanism 41.
  • the leakage relay 22 is enclosed in a shield case 19 made of magnetically soft (low coercivity) material such as iron sheet which is formed in a ring or as a pipe of round or square shape to encircle the leakage relay 22.
  • the shield case 19 is further mounted in a mounting frame 21 made of magnetically soft material such as iron sheet, and the mounting frame 21 is fixed to the base part 2a by a fixing frame 20 made of magnetically soft material such as iron sheet.
  • the leakage relay 22 is mounted in the mounting frame 21, abutting on a foamed rubber pad or similarly resilient pad member 24 by fixing a printed circuit substrate 5a to close the front opening of the mounting frame 21 and bending a pair of pins 21a, 21a to hold the face of the printed circuit substrate 5a.
  • the arrangement shown also includes a barrier 40.
  • This barrier 40 together with associated structure of the bottom part 2a and cover part 2b, defines two internal compartments.
  • the front internal compartment contains the leakage relay 22 and associated components.
  • the rear compartment contains the circuit breaker part.
  • the rear compartment is dimensioned to be small enough that hot gases generated during a breaking operation are effectively exhausted, yet not so small that the compartment will explode.
  • the front compartment serves to isolate the leakage relay 22 and associated components from exposure to the exhaust gases generated by breaking operations.
  • the circuit device according to the present invention is integrated into an electrical power distribution system as shown in FIG. 2.
  • the amplifier 9 derives power directly from the system power source 50 through the input side 5, lines 32, and lines 33.
  • Each conductor 32 then connects with its associated overcurrent detector 35, and an associated short circuit detector 36, both of conventional design.
  • the current then passes out of the circuit device through the load side 6 to a load or the system.
  • the lid or cover of the switchboard has windows for each handle, wherein the size of the window is just large enough to expose a handle flange cover 1.
  • the cover part 2b in a preferred embodiment of the present invention has a handle flange cover 1 having a square hole 49 providing access to the handle 4.
  • a leakage indication lamp 28 is also viewable through a hole in the handle flange cover 1 positioned near the handle 4.
  • a reset button 12 and a test button 13 also protrude through holes in the handle flange cover 1 near the handle 4 and the leakage indication lamp 28.
  • the zero-phase current transformer 7 detects the leakage current.
  • the output signal of the zero-phase current transformer 7 is amplified by the amplifier 9 to provide an amplified signal.
  • the amplified signal drives the leakage relay 22, which issues an alarm signal through the leakage alarm output lines 31, to an alarm 39 as shown schematically in FIG. 2.
  • the leakage indication lamp or LED 28 lights to indicate the existence of leakage.
  • the leakage relay 22 and the leakage indication lamp 28 are latched or held in the leakage detection state by means of known latching circuitry. The latched leakage state of the leakage relay 22 and the leakage indication lamp 28 are reset by pushing the reset button 12.
  • test button may be pushed. Then, by known test circuit configuration, the leakage state is simulated to check the function of the leakage relay, the leakage indication lamp, and associated circuitry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP19900104459 1989-03-10 1990-03-08 Schaltvorrichtung mit Abschalt- und Fehlerstrom erkennenden Funktionen Withdrawn EP0386768A3 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP5853089A JPH02239533A (ja) 1989-03-10 1989-03-10 漏電警報機能付き配線用遮断器
JP58530/89 1989-03-10
JP60213/89 1989-03-13
JP6021489A JPH02239535A (ja) 1989-03-13 1989-03-13 漏電警報機能付き配線用遮断器
JP60214/89 1989-03-13
JP6021389A JPH02239534A (ja) 1989-03-13 1989-03-13 漏電警報機能付き配線用遮断器

Publications (2)

Publication Number Publication Date
EP0386768A2 true EP0386768A2 (de) 1990-09-12
EP0386768A3 EP0386768A3 (de) 1992-04-29

Family

ID=27296609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900104459 Withdrawn EP0386768A3 (de) 1989-03-10 1990-03-08 Schaltvorrichtung mit Abschalt- und Fehlerstrom erkennenden Funktionen

Country Status (2)

Country Link
EP (1) EP0386768A3 (de)
KR (1) KR900015203A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689332A1 (fr) * 1992-03-30 1993-10-01 Gen Electric Interrupteur de circuit numérique avec écran anti-signaux IRF et IEM.
WO2001098137A2 (de) * 2000-06-17 2001-12-27 Rainer Seidel Automatische warnvorrichtung vor einer kritischen schiffsneigung
WO2003008263A1 (de) * 2001-07-12 2003-01-30 Neidhardt, Claus-William Automatische anker-und krängungswache
FR2910697A1 (fr) * 2006-12-25 2008-06-27 Fuji Elec Fa Components & Sys Disjoncteur de fuite a la terre
FR2917891A1 (fr) * 2007-06-19 2008-12-26 Fuji Elec Fa Components & Sys Disjoncteur de circuit de cablage ayant une alarme de fuite.
CN101281837B (zh) * 2007-04-05 2011-06-29 浙江正泰电器股份有限公司 模数化剩余电流动作保护器
CN111162457A (zh) * 2020-01-14 2020-05-15 益阳玲智工程技术有限公司 低压配电柜预报警装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020010730A (ko) * 2002-01-11 2002-02-04 홍성권 누전 표시 램프가 부착된 누전 차단기
KR20030065195A (ko) * 2002-01-31 2003-08-06 동일계기주식회사 전기 누전 경보기

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1563831B2 (de) * 1966-08-30 1971-06-09 Stotz Kontakt GmbH 6800 Mannheim Elektrischer schutzschalter mit ueberstrom kurzschluss und fehlerstromausloeser
DE1538334B2 (de) * 1966-05-06 1972-08-17 Brown, Boveri & Cie Ag, 6800 Mannheim Fehlerstromschutzschalter
US3984736A (en) * 1975-02-04 1976-10-05 Thin Fay Rai Leakage protective device
GB2162002A (en) * 1984-07-20 1986-01-22 Hsieh Teng Jui Circuit breaker with load alarm
EP0275750A1 (de) * 1986-12-29 1988-07-27 Merlin Gerin Zweipoliger Differentialunterbrecher mit Fehleranzeige

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1538334B2 (de) * 1966-05-06 1972-08-17 Brown, Boveri & Cie Ag, 6800 Mannheim Fehlerstromschutzschalter
DE1563831B2 (de) * 1966-08-30 1971-06-09 Stotz Kontakt GmbH 6800 Mannheim Elektrischer schutzschalter mit ueberstrom kurzschluss und fehlerstromausloeser
US3984736A (en) * 1975-02-04 1976-10-05 Thin Fay Rai Leakage protective device
GB2162002A (en) * 1984-07-20 1986-01-22 Hsieh Teng Jui Circuit breaker with load alarm
EP0275750A1 (de) * 1986-12-29 1988-07-27 Merlin Gerin Zweipoliger Differentialunterbrecher mit Fehleranzeige

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2689332A1 (fr) * 1992-03-30 1993-10-01 Gen Electric Interrupteur de circuit numérique avec écran anti-signaux IRF et IEM.
WO2001098137A2 (de) * 2000-06-17 2001-12-27 Rainer Seidel Automatische warnvorrichtung vor einer kritischen schiffsneigung
WO2001098137A3 (de) * 2000-06-17 2002-07-04 Rainer Seidel Automatische warnvorrichtung vor einer kritischen schiffsneigung
WO2003008263A1 (de) * 2001-07-12 2003-01-30 Neidhardt, Claus-William Automatische anker-und krängungswache
FR2910697A1 (fr) * 2006-12-25 2008-06-27 Fuji Elec Fa Components & Sys Disjoncteur de fuite a la terre
CN101281837B (zh) * 2007-04-05 2011-06-29 浙江正泰电器股份有限公司 模数化剩余电流动作保护器
FR2917891A1 (fr) * 2007-06-19 2008-12-26 Fuji Elec Fa Components & Sys Disjoncteur de circuit de cablage ayant une alarme de fuite.
CN111162457A (zh) * 2020-01-14 2020-05-15 益阳玲智工程技术有限公司 低压配电柜预报警装置

Also Published As

Publication number Publication date
EP0386768A3 (de) 1992-04-29
KR900015203A (ko) 1990-10-26

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