EP2027590A1 - Thermal and/or magnetic overload trip - Google Patents
Thermal and/or magnetic overload tripInfo
- Publication number
- EP2027590A1 EP2027590A1 EP07725118A EP07725118A EP2027590A1 EP 2027590 A1 EP2027590 A1 EP 2027590A1 EP 07725118 A EP07725118 A EP 07725118A EP 07725118 A EP07725118 A EP 07725118A EP 2027590 A1 EP2027590 A1 EP 2027590A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transmission element
- housing part
- hood
- shaft
- overload
- 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
Links
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
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal 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
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
- H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
-
- 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
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
Definitions
- the invention relates to a thermal and / or magnetic overload release for a multi-pole electrical switching device.
- the housing part accommodating the functional elements consists of an electrically insulating material, wherein each current path formed by busbars has a chamber-shaped housing area delimited by sidewalls and all the current paths have a triggering shaft pivotable about an axis of rotation.
- the trip shaft is pivoted so far against the restoring force of a spring from a rest position that it triggers a provided outside of the housing part switching mechanism.
- two manually rotatable adjusting elements are provided, whose axes of rotation are arranged perpendicular to the axis of rotation of the trip shaft.
- overload release female housing part is formed in several parts and includes a the busbars of the individual current paths and the thermal and magnetic trip units and the trigger shaft receiving framfbrmiges housing part and the two adjusting elements receiving separate support member which with the frame-shaped housing part above the triggering shaft must be screwed.
- This separate support member also serves to support a second wave-shaped transmission element, which is rotated upon actuation of the magnetic limit setting element and acts via springs on the current paths associated armature.
- the invention has for its object to disclose a compact design as possible overload release, which is a verifiable transport-safe unit, which can be mounted in a simple manner and optionally also disassembled again.
- the housing of the overload release comprises a one-piece hood-shaped housing part, which accommodates all essential functional parts, including the adjusting elements, and which is at least partially closed by a detachable cover part on the front side.
- the hood-shaped housing part is on the inside formed such that the functional elements from the front of this housing part from insertable and with the inner walls are positively or non-positively connectable.
- the hood-shaped housing part is preferably designed such that the release shaft, for example, after the attachment of the busbars to the rear wall of the hood-shaped housing part, is inserted into corresponding bearing points of the side walls of the housing part.
- the respectively required for setting the thermal and / or magnetic limit adjustment is rotatably mounted in the roof wall of the hood-shaped housing part, such that it can be inserted from the outside of the roof wall and manually operated and interacts on the inside via connecting elements with the corresponding functional elements.
- a strip-shaped bimetal element reacting to temperature changes is provided in the hood-shaped housing part of each busbar. associated with ment, which is operatively connected via a first transmission element with the pivotable release shaft, such that upon occurrence of a thermal overload, the corresponding bimetallic element acts on the first transmission element on a first arm of the release shaft, so that it against the restoring force of a spring from its rest position is pivoted in its operating position.
- a first adjusting element is rotatably mounted in the roof wall of the hood-shaped housing part, which engages via an off-center zapfenfbrmige extension in a recording of the trigger shaft and axially displaces it, so that the distance between the respective first transmission element and the opposite Area of the first arm of the trip shaft changed in a predeterminable manner.
- the first adjusting element via the eccentric zapfenfbrmige extension into a receptacle of a all current paths associated strip-shaped first transmission element acts and this moves axially, so that the distance between the respective bimetallic element and the first transmission element changed in a predeterminable manner.
- each busbar is preferably associated with a pivotally arranged anchor which is movable in the overload case against the restoring force of a spring in the direction of a second arm of the trip shaft and pivots the trip shaft from its rest position to its actuated position.
- a second adjusting element is mounted in the roof wall, which acts on all the current paths associated, arranged parallel to the trigger shaft, rotatable second transmission element acts on the current paths associated anchor such that the distance between the respective armature and the second arm of the trip shaft is changeable in a predeterminable manner.
- a web-shaped control element is arranged, which in a corresponding contour of the second adjusting element engaging, such that rotation of the second adjusting causes rotation of the second transmission element, wherein arranged on the transmission element arm- fbrmige actuating elements act on the busbar associated with the armature and press them in the direction of the second arm of the overload release.
- the side walls of the hood-shaped housing part preferably have openings which are formed as bearing points for the end regions of the second transmission element.
- the tripping shaft and / or the second transmission element are preferably an economically producible part made of an electrically insulating material (for example plastic or hard paper).
- Fig.l is a perspective view of an overload release according to the invention with the housing open for a three-pole switching device;
- FIG. 2 shows a section through the overload release shown in FIG. 1 along the section lines designated there II-II, wherein the housing is closed, FIG.
- FIGS. 1 and 2 shows a schematic illustration for explaining the interaction of a first adjusting element with a release shaft arranged in the overload release and designated 15 in FIGS. 1 and 2;
- FIG. 4 shows a partial section through a side wall of the housing in the region of a bearing point of the end region of an armature acting on an anchor element.
- FIG 2 1 denotes a thermal and magnetic overload release according to the invention for a three-pole electrical switching device.
- the overload release 1 comprises a housing 2 made of plastic. This consists essentially of a hood-shaped housing part 3 (Fig.l) with a roof wall 4, a bottom wall 5, a rear wall 6 and two side walls 7, 8 for receiving all essential functional elements of the overload release 1 and a detachable cover part 9 ( Figure 2) together.
- the cover part 9 consists of a first partial area 9 'for closing the front side 38 of the hood-shaped housing part 3 and an angled second partial area 9 "for partially covering the roof wall 4 of the hood-shaped housing part 3.
- each busbar 10 is assigned a limited by side walls chamber-shaped housing portion 11-13. All busbars 10 together in the upper region of the hood-shaped housing part 3 is associated with a pivotable about an axis of rotation 14 release shaft 15, which is preferably a one-piece plastic injection molded part.
- the trip shaft 15 is mounted in bearings 16 of the side walls 7, 8 of the hood-shaped housing part 3 and is pivoted upon reaching a predetermined thermal and / or magnetic limit from its rest position to an actuation position in which it triggers a corresponding switching mechanism (not shown).
- a responsive to changes in temperature strip-shaped bimetallic element 18 is mounted in the hood-shaped housing part 3, which is in operative connection via a pin-shaped first transmission element 19 with the pivotable release shaft 15, such that upon occurrence of a thermal overload, the corresponding bimetallic element 18 acts on the first transmission element 19 on a first arm 20 of the release shaft 15, so that it is pivoted from its rest position to its actuated position.
- a first adjusting element 21 is rotatably mounted in the roof wall 4 of the hood-shaped housing part 3, the axis of rotation 22 is perpendicular to the axis of rotation 14 of the trigger shaft 15 and which from the outside manually, for example by means of a screwdriver, can be actuated.
- the first adjustment member 21 has off-center a pin-shaped extension 23 ( Figure 3), which engages in a fork-shaped receptacle 24 of the release shaft 15 and this axially displaces upon rotation of the first adjustment member 21, so that the distance between see the respective first transmission element 19 and the (a wedge-shaped contour having) opposite surface of the first arm 20 of the trigger shaft 15 changed in a predeterminable manner.
- the bearings 16 of the trip shaft 15 in the side walls 7, 8 of the hood-shaped housing part 3 must therefore be chosen such that they allow a corresponding axial displacement of the trip shaft 15.
- an armature 25 is pivotably arranged on each busbar 10.
- this armature 25 is pivoted by the magnetic field located around the respective bus bar 10 against the tensile force of a spring 26 in the direction of a second arm 27 of the trip shaft 15.
- the trip shaft 15 is rotated from its rest position to its operating position and unlocks the switching mechanism, not shown.
- a second adjusting element 28 is rotatably mounted in the roof wall 4.
- This adjusting element 28 acts via an all busbars 10 associated, arranged parallel to the trip shaft 15, rotatable second transmission element 29 on the busbars 10 associated armature 25, so that upon rotation of the second adjusting element 28, the armature 25 against the tensile force of the springs 26 in the direction are pressed on the second arm 27 of the trip shaft 15 and the distance between the respective armature 25 and the second arm 27 of the overload release 1 is changed in a predeterminable manner.
- a web-shaped control element 30 is arranged on the second transmission element 29, which engages in a corresponding contour 31 of the second adjusting element 28.
- the second transmission element 29 has arm-shaped adjusting elements 40, which act on the armature 25 and press it in the direction of the second arm 27 of the tripping shaft 15.
- the wave-shaped end portions 32, 33 of the second transmission element 29 each have a radially extending stop cam 41.
- These stop cams 41 are in front of the inside jumping wall portions 42 of the side walls 7, 8 of the housing 2, so that an axial displacement of the second transmission element 29 is not possible.
- the transmission element 29 is first brought into a mounting position in which the stop cam 41 are each opposite a wall portion 43 of the side walls 7, 8, the is reset relative to the wall regions 42 (see Fig. 4, in which the stop cam 41 located in the mounting position is indicated by dashed lines).
- the second transmission element 29 may first be introduced, for example, in the bearing 34 and then moved relatively far to the left. Subsequently, the end portion 33 of the transmission element can then be inserted into the bearing 35 and then the transmission element 29 are rotated to its working position, in which the stop cam 41 are located in front of the wall portions 42.
- the second transmission element 29 is preferably a one-piece plastic injection molded part, the end portions 32, 33 are mounted in corresponding bearing points 34, 35 of the side walls 7, 8.
- the assembly of the overload release 1 according to the invention is very simple.
- the busbars 10 must be used with the pre-assembled strip-shaped bimetallic elements 18 and first transmission elements 19, the anchors 25 and the springs 26 of the front side 38 of the hood-shaped housing part 3 and secured to the rear wall 6 by means of screws 36.
- the tripping shaft 15 and the second transmission element 29 are then also inserted from the front side 38 of the housing part 3 into the bearing points 16 and 34, 35 of the side walls 7, 8.
- the two adjusting elements 21, 28 are inserted from above into the designated bearing points of the roof wall 4 and, if they do not already get when inserted into engagement with the corresponding connecting elements of the trigger shaft 15 and / or the second transmission element 29, connected to these elements.
- the lid part 9 is then pushed onto the hood-shaped housing part 3 until both parts are connected to each other via clips 37. Due to the dec In this case, on the one hand, the front-side opening 38 of the hood-shaped housing part 3 is closed and, on the other hand, the adjusting elements 21, 28 are secured against falling out and automatic turning.
- the invention is not limited to the embodiment described above.
- the setting of the respective thermal limit, the first adjustment via the off-center pin-shaped extension in a recording of a all current paths associated strip-shaped first transmission element acts and this moves axially, so that the distance between the respective bimetallic element and the first transmission element changed in a predeterminable manner.
- the trip shaft need not be designed to be axially displaceable.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006027544 | 2006-06-14 | ||
DE102007010944A DE102007010944A1 (en) | 2006-06-14 | 2007-03-07 | Thermal and / or magnetic overload release |
PCT/EP2007/004198 WO2007144050A1 (en) | 2006-06-14 | 2007-05-11 | Thermal and/or magnetic overload trip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2027590A1 true EP2027590A1 (en) | 2009-02-25 |
EP2027590B1 EP2027590B1 (en) | 2015-07-22 |
Family
ID=38267660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07725118.9A Active EP2027590B1 (en) | 2006-06-14 | 2007-05-11 | Thermal and/or magnetic overload trip |
Country Status (4)
Country | Link |
---|---|
US (1) | US7876192B2 (en) |
EP (1) | EP2027590B1 (en) |
DE (1) | DE102007010944A1 (en) |
WO (1) | WO2007144050A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012200922A1 (en) * | 2012-01-23 | 2013-07-25 | Siemens Aktiengesellschaft | Electric switch |
FR3007573B1 (en) * | 2013-06-20 | 2015-07-17 | Schneider Electric Ind Sas | TRIGGER AND METHOD FOR MANUFACTURING SUCH TRIGGER |
EP2905800A1 (en) * | 2014-02-11 | 2015-08-12 | Siemens Aktiengesellschaft | Thermal trip device, switching device, thermal magnetic circuit breaker and method for protecting an electrical circuit from damage |
KR102055140B1 (en) * | 2018-08-29 | 2019-12-12 | 엘에스산전 주식회사 | Molded Case Circuit Breaker |
CN110085491B (en) * | 2019-05-20 | 2020-11-20 | 西安邮电大学 | Safety switch |
US11417489B2 (en) * | 2020-06-03 | 2022-08-16 | Rockwell Automation Technologies, Inc. | Trip unit fixation in a circuit breaker |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2922007A (en) * | 1956-11-23 | 1960-01-19 | Ite Circuit Breaker Ltd | Spring mounting of current limiting devices within a housing |
US2981811A (en) * | 1957-08-22 | 1961-04-25 | Gen Electric | Circuit breaker |
US3162739A (en) * | 1962-06-25 | 1964-12-22 | Gen Electric | Electric circuit breaker with improved trip means |
US3421123A (en) * | 1967-06-19 | 1969-01-07 | Gen Electric | Electric circuit breaker with magnetic tripping means |
DE1982490U (en) | 1968-01-26 | 1968-04-04 | Stotz Kontakt Gmbh | MULTI-POLE THERMAL OVERCURRENT RELAY COMPOSED OF TWO OVERLAYING PARTS. |
US4281359A (en) * | 1980-03-14 | 1981-07-28 | General Electric Company | Static trip unit for molded case circuit breakers |
US4300110A (en) * | 1980-03-14 | 1981-11-10 | General Electric Company | Trip interlock for static trip circuit breakers |
US4922220A (en) * | 1989-03-22 | 1990-05-01 | Westinghouse Electric Corp. | Adjustable circuit breaker thermal trip unit |
FR2757309B1 (en) * | 1996-12-13 | 1999-01-29 | Schneider Electric Sa | SELECTIVE TRIP BLOCK FOR A MULTIPOLAR CIRCUIT BREAKER |
US5894259A (en) * | 1997-04-14 | 1999-04-13 | Eaton Corporation | Thermal trip unit with magnetic shield and circuit breaker incorporating same |
US5872495A (en) * | 1997-12-10 | 1999-02-16 | Siemens Energy & Automation, Inc. | Variable thermal and magnetic structure for a circuitbreaker trip unit |
US6229418B1 (en) * | 1999-08-18 | 2001-05-08 | Eaton Corporation | Circuit breaker with lockable trip unit |
US6144271A (en) * | 1999-08-18 | 2000-11-07 | Eaton Corporation | Circuit breaker with easily installed removable trip unit |
US6100777A (en) * | 1999-08-18 | 2000-08-08 | Eaton Corporation | Multi-pole circuit breaker with multiple trip bars |
US6597266B1 (en) * | 1999-11-05 | 2003-07-22 | Siemens Energy & Automation, Inc. | External actuator interlock mechanism for circuit breaker |
DE10036350C2 (en) | 2000-07-26 | 2002-06-06 | Moeller Gmbh | Circuit breaker with thermomagnetic tripping device |
JP4186415B2 (en) * | 2000-11-30 | 2008-11-26 | 富士電機機器制御株式会社 | Circuit breaker overload trip device |
US6545584B2 (en) * | 2001-01-17 | 2003-04-08 | Eaton Corporation | Circuit breaker with inertia device to prevent shockout |
DE10113040B4 (en) | 2001-03-17 | 2017-02-09 | Eaton Industries Gmbh | Arrangement for thermal tripping with temperature compensation |
US6661329B1 (en) * | 2002-06-13 | 2003-12-09 | Eaton Corporation | Adjustable thermal trip assembly for a circuit breaker |
US6850135B1 (en) * | 2003-08-01 | 2005-02-01 | Gaton Corporation | Circuit breaker trip unit employing a reset overtravel compensating rotary trip lever |
US7323956B1 (en) * | 2005-07-29 | 2008-01-29 | Eaton Corporation | Electrical switching apparatus and trip unit including one or more fuses |
US7800466B2 (en) * | 2008-05-30 | 2010-09-21 | Eaton Corporation | Magnetic trip mechanism and electrical switching apparatus employing the same |
-
2007
- 2007-03-07 DE DE102007010944A patent/DE102007010944A1/en not_active Withdrawn
- 2007-05-11 WO PCT/EP2007/004198 patent/WO2007144050A1/en active Application Filing
- 2007-05-11 US US12/304,703 patent/US7876192B2/en active Active
- 2007-05-11 EP EP07725118.9A patent/EP2027590B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007144050A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102007010944A1 (en) | 2007-12-20 |
US20090195346A1 (en) | 2009-08-06 |
WO2007144050A1 (en) | 2007-12-21 |
EP2027590B1 (en) | 2015-07-22 |
US7876192B2 (en) | 2011-01-25 |
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