EP2800122A1 - Sofortige einstellungsvorrichtung für einen schutzschalter mit gegossenem gehäuse - Google Patents

Sofortige einstellungsvorrichtung für einen schutzschalter mit gegossenem gehäuse Download PDF

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Publication number
EP2800122A1
EP2800122A1 EP12862436.8A EP12862436A EP2800122A1 EP 2800122 A1 EP2800122 A1 EP 2800122A1 EP 12862436 A EP12862436 A EP 12862436A EP 2800122 A1 EP2800122 A1 EP 2800122A1
Authority
EP
European Patent Office
Prior art keywords
armature
instant
fixed magnet
circuit breaker
contact
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.)
Granted
Application number
EP12862436.8A
Other languages
English (en)
French (fr)
Other versions
EP2800122A4 (de
EP2800122B1 (de
Inventor
Se Yong Kim
Young Min Jun
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.)
HD Hyundai Heavy Industries Co Ltd
Original Assignee
Hyundai Heavy Industries Co Ltd
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 Hyundai Heavy Industries Co Ltd filed Critical Hyundai Heavy Industries Co Ltd
Publication of EP2800122A1 publication Critical patent/EP2800122A1/de
Publication of EP2800122A4 publication Critical patent/EP2800122A4/de
Application granted granted Critical
Publication of EP2800122B1 publication Critical patent/EP2800122B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic mechanism
    • 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
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures
    • 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
    • H01H73/04—Contacts
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H2071/7481—Means for adjusting the conditions under which the device will function to provide protection with indexing means for magnetic or thermal tripping adjustment knob

Definitions

  • This application relates to an instant adjusting device for molded circuit breaker and more particularly to an instant adjustable trip device of a circuit breaker that may use an instant bar of trip unit to accurately adjust an interval between a fixed magnet and an armature and to increase a stability of the circuit breaker.
  • a circuit breaker is an electrical safety device which automatically blocks a circuit to protect a circuit and load when an abnormal current (e.g., an overcurrent, an instantaneous current or a short current) flows between a power source and a load.
  • an abnormal current e.g., an overcurrent, an instantaneous current or a short current
  • a trip for the instantaneous current of abnormal currents detects a situation where a current of a constant magnification of a rated current is instantaneously applied to the circuit breaker to trip the circuit breaker in a proper time so as not to damage the circuit or load for a corresponding magnification.
  • This function may be referred to as an instantaneous trip function.
  • Korean Patent Publication No. 10-2006-0101035 discloses an instant adjustable trip device of a circuit breaker.
  • FIG. 1 is a vertical cross sectional diagram illustrating a conventional instant adjustable trip device of a circuit breaker.
  • the conventional instant adjustable trip device of a circuit breaker 100 includes a magnet 110 being fixed on a main circuit to generate an electromagnetic force when an abnormal current is generated, an armature 120 rotating by the electromagnetic force of the magnet 110, a cross bar 130 linking with an operation of an armature 120 to rotate, a shutter 140 linking with an operation of the cross bar 130 to trigger a mechanism operation and perform a circuit blocking operation, an instant spring 150 adding a load toward an opposite rotation direction of the armature 130 to limit an operation range for a current, an instant bar 160 controlling the load of the instant spring 150 to adjust an operating current value and an instant dial 170 designating a position of the instant bar 160 by a user.
  • an electromagnetic force being generated between the magnet 110 and the armature 120 in the abnormal current is inversely proportional to the load being added by the armature spring 150. Therefore, in order that a trip may be generated in a higher current, the user rotates the instant dial 170 to incline to a bottom side of a inclination angle and the instant dial 170 is in contact with the instant bar 160 to guide an initial load increase of the instant spring 150.
  • the electromagnetic force is generated by the magnet 110, the armature 120 is pulled by a gravitational force generated by the electromagnetic force of the magnet 110 and is rotated in an anticlockwise direction thereby the armature 120 is in contact with the magnet 110.
  • the electromagnetic force may be larger than an elastic force of the instant spring 150.
  • the conventional instant adjustable trip device of the circuit breaker 100 uses the elastic force of the instant spring 150, it is difficult to maintain a consistency of the load value due to a deviation ( ⁇ 10%) inherent in the instant spring not to constantly adjust the interval between the magnet and the armature.
  • this application proposes to provide an instant adjustable trip device of the circuit breaker that may use an instant bar to constantly adjust an interval between a magnet and an armature.
  • a circuit breaker includes a fixable contact, a movable contact, a switchgear unit, a handle, a trip unit and an arc chamber unit, the circuit breaker being connected with a main circuit to cause a current to flow and the trip unit includes a fixed magnet being fixed on the main circuit and generating an electromagnetic force when the main circuit generates an abnormal current, an armature being in contact with the fixed magnet in a rotation where one side thereof is spaced apart from the fixed magnet with a fixed interval and another side thereof forms a stepped slope and an instant bar being in contact with the stepped slope of the armature and performing a left and right rectilinear motion for adjusting the interval between the fixed magnet and the armature to rotate the armature.
  • the circuit breaker may further include an armature supporter supporting one side of the armature and an armature spring connecting the armature and the armature supporter to provide an elasticity for the rotation of the armature according to a movement of the instant bar.
  • the instant dial may further include an instant dial forming thereon a groove being embodied for an instantaneous current value.
  • this application has an effect where with an armature having a stepped slope with an inclination angle and an instant bar performing a left and right rectilinear motion to rotate the armature, an interval between a fixed magnet and an armature is adjusted and an abnormal current value triggering a trip is set.
  • this application has an effect where the instant dial may form thereon a groove being embodied through an instantaneous current value to accurately set an abnormal current value triggering a trip.
  • first and second can be used to refer to various components, but the components may not be limited to the above terms. The terms will be used to discriminate one component from the other component. For instance, the first component may be referred to the second component and vice versa without departing from the right of the disclosure.
  • the term "and/or” should be understood as including all of combination that can be made from one or more relevant items.
  • the term "the first item, the second item, and/or the third item” means not only the first, the second, or the third item, but the combination of all of items that can be made from two or more of the first, second, or third items.
  • a component When a component is referred to as being “connected to” or “linked to” another component, the component may be directly connected to or linked to another component or an intervening component may be present therebetween. In contrast, if a component is referred to as being “directly connected to” or “directly linked to” another component, an intervening component may not be present therebetween.
  • the terms used in the specification are for the purpose of explaining specific embodiments and have no intention to limit the disclosure. Unless the context indicates otherwise, the singular expression may include the plural expression.
  • the term "include” or “has” will be used to refer to the feature, the number, the step, the operation, the component, the part or the combination thereof without excluding the presence or addition of one or more features, the numbers, the steps, the operations, the components, the parts or the combinations thereof.
  • FIG. 2 is a cross sectional diagram illustrating a general circuit breaker.
  • a circuit breaker includes a fixable contact 210 being connected with a power source and a load, a moveable contact 220 being connected or disconnected with the fixable contact 210 through a rotation, a switchgear unit 230 adjusting a movement of the moveable contact 220 to switch a circuit, a trip unit 240 detecting an abnormal current (i.e., an overcurrent or an instantaneous current and a short current) if occurs to trigger an operation of the switchgear unit 230 and to block the circuit and an arc chamber unit 250 removing an arc being generated when the circuit is blocked.
  • an abnormal current i.e., an overcurrent or an instantaneous current and a short current
  • FIG. 3 is a perspective diagram illustrating a trip unit structure of a circuit breaker according to an example embodiment of the described technology.
  • the trip unit 240 of the circuit breaker includes a fixed magnet 310 generating an electromagnetic force when an abnormal current is generated in the main circuit, an armature 320 forming a stepped slope 321 and being in contact with the fixed magnet 310 in a rotation and an instant bar 330 rotating the armature.
  • the trip unit 240 of the circuit breaker may further include an armature supporter 340 and an armature spring 350 connecting the armature 320 and the armature supporter 340 to provide an elasticity for a rotation of the armature 320.
  • the instant bar 330 may further include an instant dial 360 forming thereon a groove being embodied for an instantaneous current value.
  • the fixed magnet 310 is fixed on the main circuit.
  • the fixed magnet 310 generates an electromagnetic force when an abnormal current is generated in the main circuit.
  • the armature 320 is spaced apart from the fixed magnet with a fixed interval and the armature 320 is rotatably installed.
  • the armature 320 is in contact with the fixed magnet 310 when the armature 320 is rotated.
  • Another side of the armature 320 forms a stepped slope 321.
  • the armature 320 may further include a coupling projection 322 capable of fixing the instant spring 350.
  • the instant bar 330 When the instant bar 330 performs a left and right rectilinear motion, one side thereof is in contact with the stepped slope 321 of the armature 320 thereby the instant bar 330 rotates the armature 320 according to a height difference in the stepped slope 321 to adjust an interval between the fixed magnet 310 and the armature 320.
  • the instant bar 330 is in contact with the stepped slope 321 of a plurality of armatures 320 to adjust the interval between each of the plurality of the armatures 320 and each of the plurality of the fixed magnets 310.
  • the armature supporter 340 supports one side of the armature and fixes one side of the armature spring 350.
  • the armature spring 350 connects the armature 320 and the armature supporter 340 to provide an elasticity for a rotation of the armature 320 according to a movement of the instant bar 330.
  • the instant dial 360 is connected with the instant bar 330 and causes the instant bar 330 to perform a left and right rectilinear motion when the instant dial 360 is rotated.
  • the instant dial 360 may form thereon a groove 361 being embodied for an instantaneous current value. Therefore, the instant dial 360 links a driver to easily rotate.
  • FIG. 4 is a side elevation diagram illustrating a trip unit operation of a circuit breaker in FIG. 3
  • FIG. 5 is a perspective diagram illustrating a trip unit operation of a circuit breaker in FIG. 3 .
  • the instant bar 330 when the instant dial 360 is rotated, the instant bar 330 performs a left and right rectilinear motion and one side of the instant bar 330 is in contact with the stepped slope 321 of the armature 320 thereby the instant bar 330 rotates the armature 320 according to a height difference in the stepped slope 321 to adjust the interval between the fixed magnet 310 and the armature 320. That is, an abnormal current value triggering a trip is set.
  • the instant dial 60 may be rotated to connect a high side 321 b of the stepped slope 321 of the armature 320 and one side of the instant bar 330.
  • the instant dial 60 is rotated to connect a lower side 321 a of the stepped slope 321 of the armature 320 and one side of the instant bar 330.
  • the electromagnetic force is generated by the fixed magnet 310 and the a gravitational force is applied to the armature 320 by the electromagnetic force of the fixed magnet 310.
  • the armature 320 is supported by the armature spring 350 and when the gravitational force being applied to the armature 320 by the electromagnetic force of the fixed magnet 310 is larger than the elastic force of the armature spring 350, the armature 320 is rotated to be in contact with the fixed magnet 310.
  • FIG. 6 is a diagram illustrating a plurality of trip units connected with a cross bar and a shutter in FIG. 3 .
  • one side of the armature 320 is connected with a cross bar 610 and another side of the cross bar 610 is connected with a shutter 620.
  • the armature 320 of the trip unit 240 when the armature 320 of the trip unit 240 is rotated to be in contact with the fixed magnet 310, the armature 320 may apply pressure to a lower side of the cross bar 610.
  • the cross bar 610 restricts the shutter 620 and the shutter 620 is connected with the switchgear unit and when the cross bar 610 is rotated, the shutter 620 restricted by the cross bar 610 is removed from a rotation by the cross bar 610 and the switchgear unit 240 is tripped.
  • the armature 320 applies pressure to the lower side of the cross bar 610 to rotate the cross bar 610 toward a clockwise direction and when the cross bar 610 is rotated toward a clockwise direction, a constriction state of the shutter 620 constrained by the cross bar 610 is removed to cause the switchgear unit to trip.
  • this application has an effect where with the armature having the stepped slope with an inclination angle and the instant bar performing a left and right rectilinear motion to rotate the armature, the interval between the fixed magnet and the armature may be adjusted and the abnormal current value triggering a trip may be set.
  • this application has an effect where the instant dial may form thereon a groove being embodied through an instantaneous current value to accurately set the abnormal current value triggering a trip.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP12862436.8A 2011-12-28 2012-12-23 Sofortige einstellungsvorrichtung für einen schutzschalter mit gegossenem gehäuse Active EP2800122B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020110145064A KR101206540B1 (ko) 2011-12-28 2011-12-28 배선용 차단기의 순시 가조정 장치
PCT/KR2012/011331 WO2013100504A1 (ko) 2011-12-28 2012-12-23 배선용 차단기의 순시 가조정 장치

Publications (3)

Publication Number Publication Date
EP2800122A1 true EP2800122A1 (de) 2014-11-05
EP2800122A4 EP2800122A4 (de) 2015-08-26
EP2800122B1 EP2800122B1 (de) 2016-09-14

Family

ID=47565669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12862436.8A Active EP2800122B1 (de) 2011-12-28 2012-12-23 Sofortige einstellungsvorrichtung für einen schutzschalter mit gegossenem gehäuse

Country Status (4)

Country Link
EP (1) EP2800122B1 (de)
KR (1) KR101206540B1 (de)
RU (1) RU2573642C1 (de)
WO (1) WO2013100504A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170243710A1 (en) * 2016-02-22 2017-08-24 Lsis Co., Ltd. Instant trip mechanism for molded case circuit breaker
WO2017216433A1 (fr) * 2016-06-17 2017-12-21 Hager-Electro Sas (Société Par Actions Simplifiée) Appareil de protection du type disjoncteur comportant une butée de réglage du ressort de calibrage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9437384B2 (en) * 2014-07-09 2016-09-06 Eaton Corporation Circuit breaker and apparatus including slot-retained armature linkage and methods of fabricating the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958136A (en) * 1989-03-08 1990-09-18 Westinghouse Electric Corp. Circuit breaker with individual gap adjustment at high and low settings of magnetic trip
KR100390459B1 (ko) * 2001-08-06 2003-07-04 엘지산전 주식회사 배선용 차단기의 순시 가조정 트립장치
KR100421909B1 (ko) * 2001-08-23 2004-03-11 엘지산전 주식회사 배선용 차단기의 순시 가조정 트립장치
KR100652236B1 (ko) * 2005-03-18 2006-12-01 엘에스산전 주식회사 배선용차단기의 순시트립장치
RU68772U1 (ru) * 2007-07-11 2007-11-27 Открытое акционерное общество "Электроаппарат" Выключатель автоматический

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170243710A1 (en) * 2016-02-22 2017-08-24 Lsis Co., Ltd. Instant trip mechanism for molded case circuit breaker
US9837234B2 (en) * 2016-02-22 2017-12-05 Lsis Co., Ltd. Instant trip mechanism for molded case circuit breaker
WO2017216433A1 (fr) * 2016-06-17 2017-12-21 Hager-Electro Sas (Société Par Actions Simplifiée) Appareil de protection du type disjoncteur comportant une butée de réglage du ressort de calibrage
FR3052909A1 (fr) * 2016-06-17 2017-12-22 Hager-Electro Sas Appareil de protection du type disjoncteur comportant une butee de reglage du ressort de calibrage
CN108780722A (zh) * 2016-06-17 2018-11-09 黑格电子股份有限公司 包括校准弹簧的调节止动件的断路器型保护装置
CN108780722B (zh) * 2016-06-17 2020-07-03 黑格电子股份有限公司 包括校准弹簧的调节止动件的断路器型保护装置

Also Published As

Publication number Publication date
WO2013100504A1 (ko) 2013-07-04
KR101206540B1 (ko) 2012-11-30
EP2800122A4 (de) 2015-08-26
EP2800122B1 (de) 2016-09-14
RU2573642C1 (ru) 2016-01-27

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