EP2669923A1 - Schutzschalter und Verfahren zur Auslösung eines Schutzschalters - Google Patents

Schutzschalter und Verfahren zur Auslösung eines Schutzschalters Download PDF

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Publication number
EP2669923A1
EP2669923A1 EP20120382222 EP12382222A EP2669923A1 EP 2669923 A1 EP2669923 A1 EP 2669923A1 EP 20120382222 EP20120382222 EP 20120382222 EP 12382222 A EP12382222 A EP 12382222A EP 2669923 A1 EP2669923 A1 EP 2669923A1
Authority
EP
European Patent Office
Prior art keywords
tripping
circuit breaker
hammer
disposed
trip signal
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
EP20120382222
Other languages
English (en)
French (fr)
Other versions
EP2669923B1 (de
Inventor
Jorge Juan Bonilla Hernandez
Manuel Meana Alcon
Alberto Lozano Lopez
Juan Jose Garcia Alvarez
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to EP12382222.3A priority Critical patent/EP2669923B1/de
Priority to CN201310215734.7A priority patent/CN103456572B/zh
Publication of EP2669923A1 publication Critical patent/EP2669923A1/de
Application granted granted Critical
Publication of EP2669923B1 publication Critical patent/EP2669923B1/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
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H01H71/1018—Interconnected mechanisms with only external interconnections
    • 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
    • H01H71/1009—Interconnected mechanisms
    • H01H71/1027—Interconnected mechanisms comprising a bidirectional connecting member actuated by the opening movement of one pole to trip a neighbour pole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/528—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a toggle or collapsible link between handle and contact arm, e.g. sear pin mechanism
    • 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
    • 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 subject matter disclosed herein relates to the art of circuit breakers and, more particularly, to a circuit breaker tripping mechanism.
  • Circuit breakers are configured to interrupt a current flow in the event of an electrical anomaly, typically an overcurrent condition. The interruption of current flow provides protection to electrical consumers as well as associated conductors and electrical loads.
  • circuit breakers take the form of residual current circuit breakers (RCCB). Residual current circuit breakers disconnect a circuit when an imbalance is detected between current flowing between line and neutral conductors.
  • residual current circuit breakers may include both overcurrent and leakage protection. More specifically, in addition to sensing overcurrent conditions, residual current circuit breakers may also be configured with earth leakage detecting circuitry that will interrupt power in the event that current is sensed leaking to ground.
  • Circuit breakers may also include internal mechanisms that receive and/or transmit mechanical tripping forces from/to another associated circuit breaker. More specifically, in a ganged circuit breaker arrangement, or an arrangement of multiple connected circuit breakers used to protect multiple phases of a multi-phase system, a trip signal resulting from an electrical fault detected on one circuit breaker is mechanically transmitted to adjacent circuit breakers. In this manner, all breakers connected to a multiple phase system are tripped even if the electrical anomaly is found in only one phase.
  • a circuit breaker includes a trigger assembly having first and second trigger members, and a tripping mechanism configured and disposed to act upon one of the first and second trigger members to selectively open an electrical circuit upon receipt of a mechanical trip signal input, and provide a mechanical trip signal output.
  • the tripping mechanism includes a hammer having a first end defining an axis of rotation, a second end configured and disposed to act upon one of the first and second trigger members, and an intermediate portion spaced from each of the first and second ends.
  • a spring member includes an end section arranged to act upon the intermediate portion of the hammer. The spring member is configured and disposed to apply a force to the intermediate portion to urge the hammer about the axis of rotation to cause the second end to disengage from the one of the first and second trigger members and open the electrical circuit.
  • a circuit breaker in accordance with another aspect of the exemplary embodiment, includes a trigger assembly having first and second trigger members, and a first tripping mechanism operatively connected to the first and second trigger members.
  • the first tripping mechanism is configured and disposed to act upon one of the first and second trigger members to open an electrical circuit.
  • a second tripping mechanism is configured and disposed to act upon the one of the first and second trigger members to open the electrical circuit upon receipt of a mechanical trip signal input, and provide a mechanical trip signal output.
  • the second tripping mechanism includes a hammer having a first end defining an axis of rotation, a second end configured and disposed to act upon the one of the first and second trigger members, and an intermediate portion spaced from each of the first and second ends.
  • a spring member includes an end section arranged to act upon the intermediate portion of the hammer.
  • the spring member is configured and disposed to apply a force to the intermediate portion to urge the hammer about the axis of rotation to cause the second end disengage from the one of the first and second trigger members and open the electrical circuit.
  • a method of tripping a circuit breaker includes releasing a hammer having a first end, a second end and an intermediate portion from a connected position, pivoting the hammer about an axis of rotation defined at the first end, applying a spring force to the intermediate portion of the hammer spaced from the axis of rotation, and shifting the second end of the hammer from one of first and second trigger members to open an electrical circuit.
  • FIG. 1 is a left perspective view of a circuit breaker including a tripping mechanism shown in a connected condition in accordance with an exemplary embodiment
  • FIG. 2 is a right perspective view of the circuit breaker of FIG. 1 shown in a disconnected condition
  • FIG. 3 is a cross-sectional side view of the circuit breaker of FIG. 1 ;
  • FIG. 4 is a detail view of the cross-sectional view of FIG. 1 illustrating a first tripping mechanism in accordance with the exemplary embodiment shown in a tripped position;
  • FIG. 5 is a detail view of the cross-sectional view of FIG. 1 illustrating a first tripping mechanism in accordance with the exemplary embodiment shown in a tripped position;
  • FIG. 6 is a detail view of the cross-sectional view of FIG. 1 illustrating a second tripping mechanism in accordance with the exemplary embodiment shown in a non-tripped position;
  • FIG. 7 is a graph illustrating a mechanical force generated by the second tripping mechanism in accordance with the exemplary embodiment.
  • FIG. 8 is a flow chart illustrating a method of operating a circuit breaker in accordance with an exemplary embodiment.
  • Circuit breaker 2 includes a housing 4 having first and second side walls 6 and 7 joined by first and second end walls 9 and 10 and a face portion 12 to form an interior portion 14. Face portion 12 includes an extended region 16 that supports a manual operating toggle 20 as well as houses various tripping mechanism components as will be discussed more fully below. As will also be discussed more fully below, manual operating toggle 20 is pivotal between three positions; a connect position, a disconnect position, and a tripped position, about an axis of rotation 22.
  • Circuit breaker 2 includes a first opening 25, provided on first side wall 6, and a second opening 28, provided on second side wall 7.
  • An axle member 26 passes through first and second openings 25 and 28.
  • Axle member 26 is configured to receive and/or transmit a mechanical trip signal to and/or from an adjacent circuit breaker (not shown).
  • Circuit breaker 2 is further shown to include a first connector member 32 that is configured to connect to a load conductor (not shown), and a second connector member 34 configured to connect to a line conductor (also not shown).
  • first connector member 32 may alternatively be connected to a line conductor and second connector member 34 may alternatively be connected to the load conductor.
  • circuit breaker 2 includes a ground leakage test element shown in the form of a resistor 37.
  • Ground leakage test element 37 simulates a ground leakage to provide a test signal to trip circuit breaker 2 upon activation of a test button 38.
  • first and second connector members 32 and 34 are electrically coupled to a trigger assembly 39 having first and second trigger members 40 and 42.
  • Trigger members 40 and 42 are configured to act upon electrical contacts (not shown) arranged within housing 4. The electrical contacts (not shown) are selectively connected/disconnected to pass electrical current between a source of electrical energy (not shown) and an electrical load (also not shown).
  • first and second trigger members 40 and 42 are operatively connected to first and second tripping mechanisms 45 and 47.
  • First tripping mechanism 45 selectively acts upon first and second trigger members 40 and 42 based on a sensed electrical anomaly such as an over current condition, a ground leakage, and/or an arc fault condition.
  • Second tripping mechanism 47 selectively acts upon first and second trigger members 40 and 42 based on a received mechanical trip signal from an adjacent circuit breaker. Second tripping mechanism 47 also generates a mechanical trip signal that is passed to adjacent circuit breakers. At this point it should be understood that the phrase "act upon” includes releasing a biasing force from one, the other, or both of trigger members 40 and 42.
  • first tripping mechanism 45 includes a relay 60 having an actuator 61.
  • Actuator 61 is selectively extended by relay 60 upon receiving an electrical trip signal from a sensor (not separately labeled) indicating an electrical anomaly.
  • the electrical anomaly may include an over current condition, a ground leakage condition and/or an arc fault condition.
  • Actuator 61 acts upon a relay tripping lever 64 which, in turn, acts upon a tripping member 68.
  • tripping member 68 is configured to act upon first and second trigger members 40 and 42 to move manual operating toggle to a tripped position as shown.
  • Relay tripping lever 64 also acts upon a trip flag release 71 to release a trip flag 73 to provide a visual indication of a trip condition.
  • Relay tripping lever 64 includes a first end section 77 that defines an axis of rotation 79. First end section 77 extends to a second end section 82 having a contact pad 83 that receives input from actuator 61. Relay tripping lever 64 also includes a first actuator member 85 and a second actuator member 87. First actuator member 85 contacts and operates tripping member 68, and second actuator member 87 acts upon trip flag release 71. More specifically, upon sensing the electrical anomaly, actuator 61 extends from relay 60 and causes relay tripping lever 64 to pivot about axis of rotation 79. As relay tripping 64 lever pivots, first actuator member 85 acts upon tripping member 68 to shift first and second trigger members 40 and 42 as will be detailed below.
  • Second actuator member 87 acts upon trip flag release 71 to free trip flag 73.
  • Trip flag release 71 includes a first end portion 91 that extends to a second end portion 92 through an intermediate portion 93 that defines an axis of rotation 94.
  • Second end portion 92 includes a release member 96 that releases trip flag 73 to expose a visual indicator 104.
  • tripping member 68 includes a central portion 108 that includes a center portion 110. Tripping member 68 further includes a first actuating element 112 and a second actuating element 113. First actuating element 112 is configured to receive an input from first actuator member 85 to pivot tripping member 68 about center portion 110. Second actuator element 113 includes a pin element 114 that is configured to activate second tripping mechanism 47. Tripping member 68 is also operatively coupled to manual operating toggle 20 through a lever member 116. Lever member 116 includes a first end (not shown) coupled to tripping member 68 and a second end 117 coupled to manual operating toggle 20 at a position off-set from axis of rotation 22.
  • tripping member 68 ties together inputs received from manual operating toggle 20, first tripping mechanism 45, and second tripping mechanism 47 to selectively act upon first and second trigger members 40 and 42. More specifically, tripping member 68 selectively shifts first and second trigger members 40 and 42 through operation of manual operating toggle 20, and based on inputs received from first and second tripping mechanisms 45 and 47.
  • Second tripping mechanism 47 includes a hammer 130 operatively connected to tripping member 68.
  • Hammer 130 includes a first end 134 that extends to a second end 135 through an intermediate section 136.
  • First end 134 defines an axis of rotation 139 for hammer 130.
  • Second end portion 135 includes a pin member 141 that is configured to act upon second trigger member 42. More specifically, pin member 141 moves second trigger member 42 relative to first trigger member 40.
  • Intermediate portion 136 includes an actuator portion 145 having an opening 147 that receives pin element 114.
  • Actuator portion 145 also includes a contact feature 149.
  • Contact feature 149 is engaged by a spring member or main spring 153.
  • Main spring 153 includes a first end section 155 that extends to a second end section 156 through an intermediate section 158.
  • First end section 155 is fixed relative to housing 4.
  • Second end section 156 is cantilevered from a post 160 to produce a biasing force. The biasing force causes second end section 156 to act against contact feature 149 to urge pin member 141 against second trigger member 42.
  • Second tripping mechanism 47 is also shown to include an external tripping element 166 ( FIG. 3 ) operatively coupled to hammer 130.
  • a second external tripping element (not shown) is also mounted to an opposing side of hammer 130.
  • External tripping element 166 includes a first end 170 that extends to a second end 171.
  • First end 170 includes an axis of rotation (not separately labeled) that coincides with axis of rotation 139 of hammer 130 and second end 171 includes an axle receiving element 180 that is configured to receive axle member 26.
  • rotation of hammer 130 is mechanically coupled to external tripping element 166 and the second external tripping element (not shown).
  • a mechanical tripping signal input received at axle member 26 acts upon external tripping element 166.
  • External tripping element 166 in turn acts upon hammer 130 which moves first and second trigger members 40 and 42.
  • first actuator member 85 acts upon first actuating element 112 of tripping member 68 as shown in block 302. Tripping member 68 pivots causing pin element 114 to act upon actuating portion 145 of hammer 130.
  • central portion 110 crosses an imaginary line that extends between pin elements 114 and second end 117 of lever member 116 allowing main spring 156 to shift hammer 130 about axis of rotation 139 as shown in block 304. Rotation of precursor 130 disengages/releases pin member 141 from second trigger member 42 in block 306 to open first and second contacts (not shown) that open an associated electrical circuit (also not shown).
  • Main spring 156 generates mechanical trip signal output 182 in block 308 that shifts manual operating toggle to the tripped position- More specifically, mechanical trip signal output 182 develops a generally square wave form as a result of main spring 156 providing a biasing force to hammer 130 spaced from axis of rotation 139.
  • Mechanical trip signal output 182 is also passed to external tripping element 166 to mechanically trip adjacent circuit breakers (not shown) such as shown in block 310.
  • a mechanical trip signal received at external tripping element 166 is passed to hammer 130 which acts upon pin element 114. Pin element 114 rotates tripping member 68 causing central portion 110 to cross the imaginary line that extends between pin element 114 and second end 117 of lever member 116 allowing main spring 156 to force hammer 130 upward releasing second contact 42.
  • mechanical trip signal 182 generated by main spring 156 has a prolonged dwell that balances on/off trip forces with on/off actuation through manual operating toggle 20.
  • Circuit breakers require a specific force to be tripped such as shown at 400 in FIG. 7 .
  • prior art arrangements create a sharply degrading mechanical trip signal 410 due to the spring force being provided at the axis of rotation of the precursor. Sharply degrading signal 410 quickly loses energy. As such, prior art arrangements are often incapable of dislodging contacts that may become struck together.
  • the exemplary embodiments provide a trip signal having a prolonged dwell that is configured to more completely capture the force required to trip the circuit breaker.
  • the prolonged dwell provides increased time and energy to the delivery or mechanical tripping force that may assist in disconnecting mechanisms that may have become stuck together.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP12382222.3A 2012-06-01 2012-06-01 Schutzschalter und Verfahren zur Auslösung eines Schutzschalters Active EP2669923B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12382222.3A EP2669923B1 (de) 2012-06-01 2012-06-01 Schutzschalter und Verfahren zur Auslösung eines Schutzschalters
CN201310215734.7A CN103456572B (zh) 2012-06-01 2013-05-31 电路断路器和使电路断路器跳闸的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12382222.3A EP2669923B1 (de) 2012-06-01 2012-06-01 Schutzschalter und Verfahren zur Auslösung eines Schutzschalters

Publications (2)

Publication Number Publication Date
EP2669923A1 true EP2669923A1 (de) 2013-12-04
EP2669923B1 EP2669923B1 (de) 2015-09-02

Family

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Application Number Title Priority Date Filing Date
EP12382222.3A Active EP2669923B1 (de) 2012-06-01 2012-06-01 Schutzschalter und Verfahren zur Auslösung eines Schutzschalters

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EP (1) EP2669923B1 (de)
CN (1) CN103456572B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2946269T3 (es) * 2018-04-23 2023-07-14 Abb Spa Disyuntor
JP2020167089A (ja) * 2019-03-29 2020-10-08 パナソニックＩｐマネジメント株式会社 回路遮断器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534612A1 (de) * 1994-10-21 1996-05-02 Sanken Airpax Co Ltd Stromkreisunterbrecher
DE19933166A1 (de) * 1999-07-14 2001-01-18 Hager Electro Gmbh Vorrichtung zum Aktivieren und Inaktivieren von als Block angeordneten Schaltgeräten
EP2360706A1 (de) * 2010-02-23 2011-08-24 Bticino S.P.A. Verriegelungsvorrichtung von wenigstens zwei Schaltern
DE102010019741A1 (de) * 2010-05-07 2011-11-10 Siemens Aktiengesellschaft Schaltmechanik für einen Fehlerstromschutzschalter sowie Fehlerstromschutzschalter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6864450B1 (en) * 2004-05-19 2005-03-08 Eaton Corporation Circuit breaker with delay mechanism
KR100876408B1 (ko) * 2007-07-12 2008-12-31 엘에스산전 주식회사 기계적 트립 표시 기구를 갖는 기중 차단기

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19534612A1 (de) * 1994-10-21 1996-05-02 Sanken Airpax Co Ltd Stromkreisunterbrecher
DE19933166A1 (de) * 1999-07-14 2001-01-18 Hager Electro Gmbh Vorrichtung zum Aktivieren und Inaktivieren von als Block angeordneten Schaltgeräten
EP2360706A1 (de) * 2010-02-23 2011-08-24 Bticino S.P.A. Verriegelungsvorrichtung von wenigstens zwei Schaltern
DE102010019741A1 (de) * 2010-05-07 2011-11-10 Siemens Aktiengesellschaft Schaltmechanik für einen Fehlerstromschutzschalter sowie Fehlerstromschutzschalter

Also Published As

Publication number Publication date
CN103456572A (zh) 2013-12-18
EP2669923B1 (de) 2015-09-02
CN103456572B (zh) 2016-12-28

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