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WO2002021556A1 - Interrupteur de circuit avec securisation accrue du mecanisme d'actionnement - Google Patents

Interrupteur de circuit avec securisation accrue du mecanisme d'actionnement Download PDF

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Publication number
WO2002021556A1
WO2002021556A1 PCT/IB2001/001610 IB0101610W WO0221556A1 WO 2002021556 A1 WO2002021556 A1 WO 2002021556A1 IB 0101610 W IB0101610 W IB 0101610W WO 0221556 A1 WO0221556 A1 WO 0221556A1
Authority
WO
WIPO (PCT)
Prior art keywords
support member
base
circuit interrupter
operating mechanism
abutment portion
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.)
Ceased
Application number
PCT/IB2001/001610
Other languages
English (en)
Inventor
Mark O. Zindler
Keith Thomas
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.)
Eaton Corp
Original Assignee
Eaton 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
Application filed by Eaton Corp filed Critical Eaton Corp
Priority to AU8240101A priority Critical patent/AU8240101A/xx
Publication of WO2002021556A1 publication Critical patent/WO2002021556A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0221—Majority of parts mounted on central frame or wall
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0214—Housing or casing lateral walls containing guiding grooves or special mounting facilities

Definitions

  • the present invention relates to circuit interrupters generally and, more specifically, to those kinds of circuit interrupters having a housing with a base and cover, and an operating mechanism positioned within the housing.
  • Molded case circuit breakers and interrupters are well known in the art as exemplified by U.S. Patent No. 4,503,408 issued March 5, 1985, to Mrenna et al., and U.S. Patent 5,910,760 issued June 8, 1999 to Malingowski, et al., each of which is assigned to the assignee of the present application and incorporated herein by reference.
  • a continuing industry objective with respect to many types of circuit interrupters is to be able to reduce the size and/or footprint of the interrupter housing while at the same time providing the same or improved performance capabilities.
  • a major advantage of creating such a "smaller package" is that it provides increased flexibility in installation.
  • a consequence of this objective is that the internal space constraints of such interrupters have become much more limiting, posing certain design obstacles that need to be overcome.
  • Circuit interrupters typically include a housing having a base and cover.
  • an operating mechanism that is interconnected with the contacts of the circuit interrupter.
  • the operating mechanism sometimes is held in place by an independent securement mechanism such as orbital riveting, twist tabs, or screws.
  • independent securement adds to the cost of assembly, and slows down the assembly process.
  • securement mechanisms typically require relatively thick wall or bottom sections in the housing in order to be implemented, housing characteristics which are undesirable in view of the continuing industry objective mentioned above of reducing circuit interrupter size.
  • prior art circuit interrupters have sometimes employed a "floating" operating mechanism that is not secured by an independent securement mechanism. Instead, other structures of the circuit interrupter are usually relied upon to secure the operating mechanism within the base upon completion of the assembly process.
  • the positioning of the cover onto the base can be used for that purpose, with the bottom of the cover designed to contact a top surface of the operating mechanism to hold the mechanism in place.
  • a high current interruption event can cause the contact arm to forcibly rise, imparting an upward force on the operating mechanism structure that can cause damage to the bottom of the cover making contact with the operating mechanism.
  • This potential damage to the cover may result in the operating mechanism being insufficiently engaged after such a high current interruption event. This can lead to improper positioning and functioning of the operating mechanism.
  • circuit breaker existed that provided an efficient, economical, and easy to implement way of holding the operating mechanism in the base, and especially one which would effectively hold the operating mechanism in the base during a high current interruption event.
  • the present invention provides a circuit interrupter that meets all of the above-identified needs.
  • a circuit interrupter which includes a housing, separable main contacts disposed in the housing, and an operating mechanism disposed in the housing and interconnected with the separable main contacts.
  • the housing includes a cover positioned on top of a base, with the base including an abutment portion having a bottom surface.
  • the operating mechanism includes a support member situated within the base, the support member including a protrusion situated beneath the abutment portion and positioned to contact the bottom surface for resisting upward movement of the support member.
  • Figure 1 is an orthogonal view of a molded case circuit breaker embodying the present invention.
  • Figure 2 is an exploded view of the base and cover of the circuit interrupter of Figure 1.
  • Figure 3 is side elevational view of an internal portion of the circuit interrupter of Figure 1.
  • Figure 4 is an orthogonal view of the internal portions of the circuit interrupter of Figure 1 without the base and cover.
  • Figure 5 is an orthogonal view of an internal portion of the circuit interrupter of Figure 1 including the operating mechanism.
  • Figure 6 is a side elevational, partially broken away view of the operating mechanism of the circuit interrupter of Figure 1 with the contacts and the handle in the OFF disposition.
  • Figure 7 is a side elevational, partially broken away view of the operating mechanism with the contacts and the handle in the ON disposition.
  • Figure 8 is a side elevational, partially broken away view of the operating mechanism with the contacts and the handle in the TRIPPED disposition.
  • Figure 9 is a side elevational, partially broken away view of the operating mechanism during a resetting operation.
  • Figure 10 is an orthogonal view of the sideplate assembly, cradle, latch, and trip bar assembly of an internal portion of the circuit interrupter of Figure 1.
  • Figure 11 is an exploded view of the internal portion of the circuit interrupter shown in Figure 10.
  • Figure 12 is an orthogonal view of the base of the circuit interrupter of Figure 1 with a sidewall partially cut away and showing a positioning region.
  • Figure 13 is an orthogonal view similar to Figure 12 with a sideplate inserted into the positioning region.
  • Circuit breaker 10 includes a base 12 mechanically interconnected with a cover 14 to form a circuit breaker housing 15 molded of thermoset plastic material in the exemplary embodiment. Holes or openings 16 ( Figure 2) are provided in cover 14 for accepting screws or other attaching devices 128 that enter corresponding holes or openings 18 in base 12 for fastening cover 14 to base
  • Cover 14 includes a handle opening 22 through which protrudes a handle 24 (Figure 1) that is used in a conventional manner to manually open and close the contacts of circuit breaker 10 and to reset circuit breaker 10 when it is in a tripped state. Handle 24 may also provide an indication of the status of circuit breaker 10 whereby the position of handle 24 corresponds with a legend (not shown) on cover 14 near handle opening 22 which clearly indicates whether circuit breaker 10 is ON (contacts closed), OFF (contacts open), or TRIPPED (contacts open due to, for example, an overcurrent condition). Cover 14 also includes a rectangular opening 23
  • circuit breaker 10 is depicted as a single-phase circuit breaker, the present invention is not limited to single-phase operation.
  • a longitudinal section of a side elevation, partially broken away and partially in phantom, of circuit breaker 10 is shown having a load terminal 28 and a line terminal 29.
  • a plasma arc acceleration chamber 30 comprising a slot motor assembly 32 and an arc extinguisher assembly 34.
  • a contact assembly 36, an operating mechanism 38, and a trip mechanism 40 are also shown.
  • slot motor assembly 32 is shown as including a separate upper slot motor assembly 32A and a separate lower slot motor assembly 32B.
  • Upper slot motor assembly 32A includes an upper slot motor assembly housing 41 within which are stacked side-by-side U-shaped upper slot motor assembly plates 42.
  • lower slot motor assembly 32B includes a lower slot motor assembly housing 43 within which are stacked side-by-side lower slot motor assembly plates 44. Plates 42 and 44 are both composed of magnetic material.
  • Arc extinguisher assembly 34 includes an arc chute 46 within which are positioned spaced-apart generally parallel angularly offset arc chute plates 48 and an upper arc runner 48A. As known to one of ordinary skill in the art, the function of arc extinguisher assembly 34 is to receive and dissipate electrical arcs that are created upon separation of the contacts of the circuit breaker.
  • contact assembly 36 comprising a movable contact arm 50 supporting thereon a movable contact 52, and a stationary contact arm 54 supporting thereon a stationary contact 56.
  • Stationary contact arm 54 is electrically connected to line terminal 29 and, as discussed below, movable contact arm 50 is electrically connected to load terminal 28. Also shown is a crossbar assembly 60 which traverses the width of circuit breaker 10 and is rotatably disposed on an internal portion of base 12 (not shown). Actuation of operating mechanism 38, in a manner described in detail below, causes crossbar assembly 60 and movable contact arm 50 to rotate into or out of a disposition which places movable contact 52 into or out of a disposition of electrical continuity with fixed contact 56.
  • Crossbar assembly 60 includes a movable contact cam housing 62 in which is disposed a pivot pin 64 upon which movable contact arm 50 is rotatably disposed.
  • movable contact arm 50 rotates in unison with the rotation of housing 62 as housing 62 is rotated clockwise or counterclockwise by action of operating mechanism 38.
  • movable contact arm 50 is free to rotate (within limits) independently of the rotation of crossbar assembly 60.
  • movable contact arm 50 can rotate upwardly about pivot pin 64 under the influence of high magnetic forces. This is referred to as "blow-open" operation, and is described in greater detail below.
  • Operating mechanism 38 is shown. Operating mechanism 38 is structurally and functionally similar to that shown and described in U.S. Patent Application
  • Operating mechanism 38 comprises a handle arm or handle assembly 70 (connected to handle 24), a configured plate or cradle 72, an upper toggle link 74, an interlinked lower toggle link 76, and an upper toggle link pivot pin 78 which interlinks upper toggle link 74 with cradle 72.
  • Lower toggle link 76 is pivotally interconnected with upper toggle link 74 by way of an intermediate toggle link pivot pin 80, and with crossbar assembly 60 at pivot pin 64.
  • a cradle pivot pin 82 which is laterally and rotatably disposed between parallel, spaced apart operating mechanism support members or sideplates 84 (formed of metal in the exemplary embodiment).
  • Cradle 72 is free to rotate (within limits) via cradle pivot pin 82.
  • a handle assembly roller 86 which is disposed in and supported by handle assembly 70 in such a manner as to make mechanical contact with (roll against) arcuate portions of a back region 87 of cradle 72 during a "resetting" operation of circuit breaker 10 as is described below.
  • a main stop bar 88 is laterally disposed between sideplates 84, and provides a limit to the counter-clockwise movement of cradle 72.
  • FIG 6 an elevation of that part of circuit breaker 10 particular associated with operating mechanism 38 is shown for the OFF disposition of circuit breaker 10.
  • Contacts 52 and 56 are shown in the disconnected or open disposition.
  • An intermediate latch 90 is shown in its latched position wherein it abuts hard against a lower portion 92 of a latch cutout region 94 of cradle 72.
  • a pair of side-by-side aligned compression springs (not shown) such as shown in United States Patent No. 4,503,408 is disposed between the top portion of handle assembly 70 and the intermediate toggle link pivot pin 80.
  • operating mechanism 38 is shown for the ON disposition of circuit breaker 10.
  • contacts 52 and 56 are closed (in contact with each other) whereby electrical current may flow from load terminal 28 to line terminal 29.
  • handle 24, and thus fixedly attached handle assembly 70 are rotated in a counter-clockwise direction (to the left) thus causing the intermediate toggle link pivot pin 80 to be influenced by the tension springs (not shown) attached thereto and to the top of handle assembly 70.
  • the influence of the tension springs causes upper toggle link 74 and lower toggle link 76 to assume the position shown in Figure 7 which causes the pivotal interconnection with crossbar assembly 60 at pivot point 64 to rotate crossbar assembly 60 in the counter-clockwise direction.
  • crossbar assembly 60 causes movable contact arm 50 to rotate in the counterclockwise direction and ultimately force movable contact 52 into a pressurized abutted disposition with stationary contact 56. It is to be noted that cradle 72 remains latched by intermediate latch 90 as influenced by trip mechanism 40.
  • operating mechanism 38 is shown for the TRIPPED disposition of circuit breaker 10.
  • the TRIPPED disposition is related (except when a manual tripping operation is performed) to an automatic opening of circuit breaker 10 caused by the thermally or magnetically induced reaction of trip mechanism 40 to the magnitude of the current flowing between load conductor 28 and line conductor 29.
  • a description of the operation of trip mechanism 40 can be found in U.S. Patent Application Serial No. 09/384,148, filed August 27, 1999, entitled “Circuit Interrupter With Cradle Having An Improved Pivot Pin Connection", the disclosure of which is incorporated herein by reference.
  • trip mechanism 40 For purposes here, circumstances such as a load current with a magnitude exceeding a predetermined threshold will cause trip mechanism 40 to rotate trip bar assembly 190 clockwise (overcoming the spring force biasing assembly 190 in the opposite direction) and away from intermediate latch 90.
  • This unlocking of latch 90 releases cradle 72 (which had been held in place at lower portion 92 of latch cutout region 94) and enables it to be rotated counter-clockwise under the influence of the tension springs (not shown) interacting between the top of handle assembly 70 and the intermediate toggle link pivot pin 80.
  • the resulting collapse of the toggle arrangement causes pivot pin 64 to be rotated clockwise and upwardly to thus cause crossbar assembly 60 to similarly rotate.
  • circuit breaker 10 can not again achieve the ON disposition (contacts 52 and 56 closed) until it is first "reset” via a resetting operation which is described in detail below.
  • operating mechanism 38 is shown during the resetting operation of circuit breaker 10. This occurs while contacts 52 and 56 remain open, and is exemplified by a forceful movement of handle 24 to the right (or in a clockwise direction) after a tripping operation has occurred as described above with respect to Figure 8.
  • handle assembly 70 moves correspondingly, causing handle assembly roller 86 to make contact with back region 87 of cradle 72.
  • This contact forces cradle 72 to rotate clockwise about cradle pivot pin 82 and against the tension of the springs (not shown) that are located between the top of handle assembly 70 and the intermediate toggle link pivot pin 80, until an upper portion 93 of latch cutout region 94 abuts against the upper arm or end of intermediate latch 90.
  • This abutment forces intermediate latch 90 to rotate to the left (or in a counter-clockwise direction) so that the bottom portion thereof rotates to a disposition of interlatching with trip bar assembly 190, in a manner described in more detail below.
  • upper slot motor assembly 32A and lower slot motor assembly 32B are structurally and functionally similar to that described in United States Patent 5,910,760 and plates 42 and 44 thereof form an essentially closed electro-magnetic path in the viscinity of contacts 52 and 56.
  • electrical current continues to flow in movable contact arm 50 and through an electrical arc created between contacts 52 and 56.
  • This current induces a magnetic field into the closed magnetic loop provided by upper plates 42 and lower plates 44 of upper slot motor assembly 32A and lower slot motor assembly 32B, respectively.
  • This magnetic field electromagnetically interacts with the current in such a manner as to accelerate the movement of movable contact arm 50 in the opening direction whereby contacts 52 and 56 are more rapidly separated.
  • crossbar assembly 60 and, in particular, cam housing 62 are structurally and functionally similar to that described in United States 5,910,760.
  • cam housing 62 includes a spring-loaded cam follower (not shown) which, when a blow-open operation has occurred, latches movable contact arm 50 in its blown-open disposition.
  • Trip shaft 192 is shown laterally disposed between parallel sideplates 84 of the sideplate assembly, with its ends positioned within holes or openings 216. This disposition provides a pivot area about which trip bar assembly 190 can rotate. This rotation is influenced by spring 202 (not shown in Figure 10) that rotationally biases assembly 190 in the counter-clockwise direction. Also shown is intermediate latch 90 which, like trip shaft 192, is laterally disposed between sideplates 84. Holes or openings 208 of latch 90 are mated with corresponding circular protrusions or indents 218 in sideplates 84, providing a pivot area for rotation of latch 90. Protrusions or indents 220 in sideplates 84 provide a stop for limiting the rotation of latch 90 in the clockwise direction which occurs during a tripping operation.
  • each of sideplates or support members 84 includes a leg 500 and a leg 502, with a protrusion or foot 503 positioned on the bottom of leg 502 and extending in the direction of contacts 52 and 56 (see Figure 5).
  • the top surface of each of sideplates 84 also includes raised or pointed regions 504, for purposes described below.
  • each of sidewalls 510 and 512 includes a molded, recessed positioning region 514 forming ledges 516A and 516B.
  • the two positioning regions 514 are essentially mirror images of each other. However, for the sake of simplicity, only positioning region 514 of sidewall 512 is shown, with sidewall 510 cut away for clarity of illustration.
  • Each positioning region 514 is shaped to generally correspond to the overall shape of the bottom of a sideplate 84, and includes regions 518 and 520 corresponding to legs 500 and 502, respectively, and an abutment portion or ledge 522. As shown in
  • Regions 518 and 520 are sized to be larger than legs 500 and 502, respectively, of sideplate 84 so that sideplate 84 can be easily inserted within or removed from positioning region 514 via movement of sideplate 84 in the direction generally represented by the double-sided arrow labeled "A".
  • protrusion or foot 503 of sideplate 84 contacts or abuts against abutment portion 522 of positioning region 514, thereby preventing sideplate 84 from being vertically displaced by the force.
  • a high current interruption event could cause movable contact arm 50 to forcibly rise (to achieve a contacts OPEN disposition) and impart an upward force on operating mechanism 38.
  • support members 84 Serving as the support structure or foundation of operating mechanism 38, support members 84 would experience this force, which would be in the direction represented by the arrow labeled "B" in Figure 13. Because, as described above, each sideplate
  • protrusions or feet 503 serve to anchor sideplates 84, and thus operating mechanism 38, within base 12, especially with respect to a force created by a the forcible rising of contact arm 50 due to a high current interruption event
  • another securement mechanism is employed in the exemplary embodiment in order further secure operating mechanism 38.
  • the top surface of sideplates 84 include raised or pointed regions 504 (see Figure 10).
  • cover 14 of circuit breaker 10 includes sidewalls that correspond to sidewalls 510 and 512 of base 12.
  • the bottom surfaces of the sidewalls of cover 14 are designed and configured to generally match up and mate together with the top surfaces of sidewalls 510 and 512 when cover 14 is positioned atop base 12 during the assembly process.
  • the sidewalls of cover 14 include substantially flat contact surfaces which make contact with the top surfaces of sideplates 84.
  • Raised regions 504 provide sufficient additional height to the top surfaces of sideplates 84 whereby they ensure that the top surfaces will substantially be the first areas within base 12 to be contacted by cover 14 during the assembly process, thus ensuring proper engagement of sideplates 84. This is very beneficial because variability in parts and slight aberrations in the molding process can cause the sidewalls of cover 14 to not mate perfectly with the sidewalls of base 12 and the top surfaces of sideplates 84, potentially causing sideplates 84 to not be sufficiently engaged and held in place (if raised regions 504 did not exist).
  • raised regions 504 When raised regions 504 contact their respective contact surfaces, they accommodate further lowering of cover 14 onto base 12 (as cover 14 is screwed in place) by digging or piercing into the contact surfaces.
  • the present invention embodied in the exemplary embodiment by protrusions or feet 503 and abutment portion 522, provides an efficient, economical, and easy to implement way of holding operating mechanism 38 in base 12, and especially one which effectively holds operating mechanism 38 in base 12 during a high current interruption event.
  • the present invention also protects those portions of the bottom of cover 14 making contact with operating mechanism 38, thereby enabling cover 14 to continue to securely engage operating mechanism 38 as needed for proper functioning thereof.
  • the exemplary embodiment of the present invention described above is advantageous in that it enables compression molding to be used in order to form positioning region 514 in base 12.

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Abstract

Cette invention se rapporte à un interrupteur de circuit, qui comprend un logement, des contacts principaux séparables placés dans le logement et un mécanisme d'actionnement placé dans le logement et interconnecté auxdits contacts. Le logement de cet interrupteur de circuit comporte un couvercle placé sur une base, laquelle est pourvue d'une partie butée présentant une surface inférieure. Le mécanisme d'actionnement comprend un élément de support placé dans la base et muni d'une saillie, qui est située sous la partie butée et qui est disposée de façon à venir en contact avec la surface inférieure pour résister au mouvement montant de l'élément de support.
PCT/IB2001/001610 2000-09-05 2001-09-03 Interrupteur de circuit avec securisation accrue du mecanisme d'actionnement Ceased WO2002021556A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU8240101A AU8240101A (en) 2000-09-05 2001-09-03 Circuit interrupter with enhanced operating mechanism securement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US65552300A 2000-09-05 2000-09-05
US09/655,523 2000-09-05

Publications (1)

Publication Number Publication Date
WO2002021556A1 true WO2002021556A1 (fr) 2002-03-14

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PCT/IB2001/001610 Ceased WO2002021556A1 (fr) 2000-09-05 2001-09-03 Interrupteur de circuit avec securisation accrue du mecanisme d'actionnement

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AU (1) AU8240101A (fr)
WO (1) WO2002021556A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007009406A1 (fr) * 2005-07-20 2007-01-25 Oez S.R.O. Appareil de commutation, en particulier, disjoncteur de circuit de puissance
EP1835521A1 (fr) * 2006-03-17 2007-09-19 Circuit Breaker Industries Ltd. Support de contact mobile pour un mécanisme de disjoncteur
DE102006038191B3 (de) * 2006-08-16 2007-11-29 Moeller Gmbh Schaltgerät, insbesondere Niederspannungsschalter
US9786447B2 (en) 2015-01-08 2017-10-10 General Electric Company Mounting assembly for a circuit breaker mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178547A (en) * 1961-05-10 1965-04-13 Ite Circuit Breaker Ltd Mechanism mounting device for circuit breaker
US4849725A (en) * 1987-06-12 1989-07-18 Fuji Electric Co., Ltd. Multipolar circuit breaker
US4894632A (en) * 1988-11-21 1990-01-16 Castonguay Roger N Molded case circuit breaker operating mechanism fold-down arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178547A (en) * 1961-05-10 1965-04-13 Ite Circuit Breaker Ltd Mechanism mounting device for circuit breaker
US4849725A (en) * 1987-06-12 1989-07-18 Fuji Electric Co., Ltd. Multipolar circuit breaker
US4894632A (en) * 1988-11-21 1990-01-16 Castonguay Roger N Molded case circuit breaker operating mechanism fold-down arrangement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007009406A1 (fr) * 2005-07-20 2007-01-25 Oez S.R.O. Appareil de commutation, en particulier, disjoncteur de circuit de puissance
CZ300251B6 (cs) * 2005-07-20 2009-04-01 Oez S. R. O. Spínací prístroj, zvlášte výkonový jistic
KR100987288B1 (ko) 2005-07-20 2010-10-12 오이제트 에스.알.오. 전력회로차단기의 스위칭 장치
EP1835521A1 (fr) * 2006-03-17 2007-09-19 Circuit Breaker Industries Ltd. Support de contact mobile pour un mécanisme de disjoncteur
DE102006038191B3 (de) * 2006-08-16 2007-11-29 Moeller Gmbh Schaltgerät, insbesondere Niederspannungsschalter
WO2008019718A1 (fr) * 2006-08-16 2008-02-21 Moeller Gmbh Appareillage de commutation, notamment commutateur de basse tension
US9786447B2 (en) 2015-01-08 2017-10-10 General Electric Company Mounting assembly for a circuit breaker mechanism

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Publication number Publication date
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