EP1643527A2 - Betätigungseinrichtung für einen Hilfsschalter und damit versehener Schutzschalter - Google Patents

Betätigungseinrichtung für einen Hilfsschalter und damit versehener Schutzschalter Download PDF

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Publication number
EP1643527A2
EP1643527A2 EP05021450A EP05021450A EP1643527A2 EP 1643527 A2 EP1643527 A2 EP 1643527A2 EP 05021450 A EP05021450 A EP 05021450A EP 05021450 A EP05021450 A EP 05021450A EP 1643527 A2 EP1643527 A2 EP 1643527A2
Authority
EP
European Patent Office
Prior art keywords
accessory
legs
actuator clip
accessory actuator
clip
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
EP05021450A
Other languages
English (en)
French (fr)
Other versions
EP1643527A3 (de
EP1643527B1 (de
Inventor
David Edward Little
David Allen Parks
David Curtis Turner
Erik Russell Bogdon
Dominic Patrick Martelli
James Alan Trax
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
Publication of EP1643527A2 publication Critical patent/EP1643527A2/de
Publication of EP1643527A3 publication Critical patent/EP1643527A3/de
Application granted granted Critical
Publication of EP1643527B1 publication Critical patent/EP1643527B1/de
Not-in-force 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • H01H71/465—Self-contained, easily replaceable microswitches

Definitions

  • This invention relates to circuit breakers with auxiliary switches that signal the state of the breaker contacts and, more particularly, to arrangements for actuating the auxiliary switch.
  • auxiliary switch that signals the open or closed state of the circuit breaker contacts.
  • the auxiliary switch is offered as an option.
  • the auxiliary switch can be added, if requested, by insertion in a compartment in a primary cover of the circuit breaker that is enclosed by a secondary cover.
  • the plunger of the auxiliary switch extends through an opening in the primary cover where it is actuated by a projection molded on the crossbar that ties the moving contact arms of the multipole circuit breaker together.
  • the crossbar necessarily must be stiff to assure coordinated movement of the contact arms of all of the poles.
  • the projection on the crossbar which is molded of the same material is stiff and non-compliant.
  • aspects of the invention are directed to a multipole circuit breaker in which an accessory is actuated by an actuator secured to the crossbar and having a compliant finger that actuates and deactuates a plunger of the accessory while accommodating for variations in travel of the crossbar such as those resulting from tolerances and overtravel.
  • a circuit breaker comprises: a housing; a plurality of poles each comprising: separable contacts each comprising a fixed contact and a movable contact, and a contact arm assembly comprising a contact arm having the movable contact affixed to a distal end and a carrier pivotally mounting the contact arm for rotation between a closed position in which the movable contact engages the fixed contact and an open position in which the movable contact is separated from the fixed contact; a crossbar connecting the contact arm assemblies of the poles together as a moving assembly; an operating mechanism coupled to the moving assembly to simultaneously move the contact arms of the poles between the open and closed positions; an accessory having a plunger mounted in the housing adjacent to the crossbar; and an accessory actuator clip secured to and movable with the crossbar and having a finger that engages the plunger to actuate the accessory with the contact arms in one of the open and closed positions and that releases the plunger to deactuate the accessory in the other of the open and closed positions, the finger being complaint
  • the accessory actuator clip may be molded as a unitary piece from a compliant material.
  • the accessory actuator clip may comprise a plurality of hooks that secure the accessory actuator clip to the crossbar.
  • the crossbar may be secured to the carrier of the contact arm assembly of one of the poles with a staple.
  • the staple may include a pair of legs.
  • the accessory actuator clip may be a molded clip that seats over the staple with a pair of hooks engaging the pair of legs of the staple.
  • the accessory actuator clip may include a pair of legs having distal ends.
  • the staple may include a pair of legs having distal ends.
  • a pair of cleats may project inwardly from the distal ends of the legs of the accessory actuator clip.
  • the legs of the accessory actuator clip may straddle the legs of the staple.
  • the cleats may snap under the distal ends of the legs of the staple to secure the accessory actuator clip to the moving assembly.
  • the accessory actuator clip may include a U-shape having a base and a pair of parallel legs.
  • the finger may extend at an angle from the outer surface of one of the legs.
  • an accessory actuator clip is for a circuit breaker including a housing, a plurality of poles each comprising: separable contacts each comprising a fixed contact and a movable contact, and a contact arm assembly comprising a contact arm having a movable contact affixed to a distal end and a carrier pivotally mounting the contact arm for rotation between a closed position in which the movable contact engages the fixed contact and an open position in which the movable contact is separated from the fixed contact, a crossbar connecting the contact arm assemblies of the poles together as a moving assembly, an operating mechanism coupled to the moving assembly to simultaneously move the contact arms of the poles between the open and closed positions, and an accessory having a plunger mounted in the housing adjacent to the crossbar.
  • the accessory actuator clip comprises: a base; a pair of legs; and a finger extending at an angle from the outer surface of one of the legs, wherein the accessory actuator clip is structured to secure to and be movable with the crossbar, wherein the finger is structured to engage the plunger to actuate the accessory with the contact arms in one of the open and closed positions and to release the plunger to deactuate the accessory in the other of the open and closed positions, and wherein the finger is complaint to accommodate for variations in travel of the crossbar.
  • FIG. 1 illustrates a circuit breaker 1 incorporating aspects of the invention.
  • the circuit breaker 1 has a housing 3 formed by a base 5, a primary cover 7 that mates with the base 5, and a secondary cover 9 seated on the primary cover.
  • the example circuit breaker 1 has three poles 11 A, 11 B and 11C, although the invention is applicable to circuit breakers having two or more poles.
  • the load conductors 13A, 13B and 13C for these poles are visible in Figure 1.
  • a handle 15 is used to manually turn the circuit breaker 1 off and on.
  • FIGS 2 and 3 illustrate only pertinent internal parts of the circuit breaker 1.
  • Each of the poles of the circuit breaker 1, such as the pole 11A has separable contacts 17 in the form of a fixed contact 19 and a movable contact 21.
  • the fixed contact 19 is mounted on a line conductor 23, while the movable contact 21 is affixed to the distal end 25 of a contact arm 27.
  • the contact arm 27 is supported for pivotal movement at about an axis 29 by a carrier 31 to form a contact arm assembly 33.
  • the contact arm assembly 33 is rotatable between a closed position, as shown in Figure 2, in which the movable contact 21 engages the fixed contact 19 and an open position (not shown) in which the separable contacts 17 are separated.
  • the contact arm assemblies 33 of the three poles 11A-11C are joined together to form a moving contact assembly 37 by a crossbar 39.
  • an operating mechanism 41 typically coupled to the center pole 11 B, operates the moving assembly 37 to simultaneously open and close the separable contacts 17 of each of the poles 11A-11C.
  • the operating mechanism 41 can be actuated manually by the handle 15 or automatically in response to specified current/time characteristics of load current by a trip mechanism 43, again as is well known.
  • the crossbar 39 is tied to the carrier 31 of each pole 11 by a staple 45.
  • the staple 45 has a pair of legs 47 each of which terminates in a pair of stakes 49 that extend through holes in the carrier 31 as can be seen in Figure 3. The ends of the stakes 49 are spun to secure the staple 45, and therefore, the crossbar 39 to the contact arm assembly 33.
  • the primary cover 7 of the circuit breaker 1 has a compartment 53 in which is received an accessory such as the auxiliary switch 55.
  • the auxiliary switch 55 is secured in the compartment 55 by the secondary cover 9 ( Figure 1).
  • the auxiliary switch 55 has a plunger 57 that extends downward into the cavity 59 where is it actuated by an accessory actuator clip 61 ( Figure 3).
  • the accessory actuator clip 61 is U-shaped having a base part 63 and a pair of legs 65 and 67 extending in generally parallel planes from the ends of the base part 63.
  • An actuating finger 69 extends at an angle from the outer surface of the leg 65.
  • a pair of hooks, such as cleats 71, chamfered at the lateral edges 73 project inwardly from the distal ends of the legs 65 and 67.
  • the accessory actuator clip 61 is preferably molded as an integral piece from a compliant material such as, for example, a polyester resin. It is secured on the crossbar 39 by spreading the legs 65 and 67 to straddle the legs 47 of the staple 45 ( Figure 5). When fully seated on the staple 45, the cleats 71 snap under the distal ends of the legs 47 of the staple 45 between the stakes 49 to firmly secure the accessory actuator clip 61 to the moving assembly 37 ( Figure 3). As can be seen from Figures 2, 3 and 5, when the contact arm assembly 33 of the pole 11A is in the closed position, the actuating finger 69 of the actuator accessory clip 61 ( Figure 4) engages and actuates the plunger 57 of the auxiliary switch 55.
  • a compliant material such as, for example, a polyester resin
  • the actuating finger 69 is stiff enough that it overcomes the spring bias on the plunger 57 to actuate the plunger, yet is flexible enough that when the plunger seats, the actuating finger 69 can flex to accommodate for overtravel.
  • This overtravel can result from a stackup of tolerances in the moving assembly 37 which can result in different angular positions of the crossbar 39 when the separable contacts 17 are closed. Additional variations in the final position of the crossbar 39 with the separable contacts 17 closed can be attributed to wear of the fixed and movable contacts 19 and 21.
  • the flexing of the actuating finger 69 due to the compliant material from which it is made easily accommodates for these variations without generating undue stresses.
  • the accessory in the exemplary embodiment of the invention is the auxiliary switch 55.
  • auxiliary switches are commonly used to signal the open/closed state of the separable contacts 17, such as for remote monitoring or operation.
  • a similar microswitch is typically incorporated into a shunt trip mechanism (not shown), which allows the coil of the shunt trip mechanism to be energized only when the separable contacts 17 are closed.
  • a shunt trip mechanism is variously used for remote tripping of the breaker and for electronic tripping, which can include tripping for ground faults and/or arc faults.
  • example accessories are disclosed, a wide range of circuit breaker accessories may be employed with the example accessory actuator clip 61.

Landscapes

  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP05021450A 2004-10-01 2005-09-30 Betätigungseinrichtung für einen Hilfsschalter und damit versehener Schutzschalter Not-in-force EP1643527B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61544604P 2004-10-01 2004-10-01

Publications (3)

Publication Number Publication Date
EP1643527A2 true EP1643527A2 (de) 2006-04-05
EP1643527A3 EP1643527A3 (de) 2007-07-25
EP1643527B1 EP1643527B1 (de) 2009-04-15

Family

ID=35517204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05021450A Not-in-force EP1643527B1 (de) 2004-10-01 2005-09-30 Betätigungseinrichtung für einen Hilfsschalter und damit versehener Schutzschalter

Country Status (6)

Country Link
EP (1) EP1643527B1 (de)
CN (1) CN100585768C (de)
AT (1) ATE429026T1 (de)
CA (1) CA2521677C (de)
DE (1) DE602005013874D1 (de)
ZA (1) ZA200507950B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016179156A1 (en) * 2015-05-07 2016-11-10 Eaton Corporation Electrical switching apparatus and trip assembly therefor
WO2019058206A1 (en) * 2017-09-25 2019-03-28 Eaton Intelligent Power Limited CIRCUIT SWITCH, TRIGGER BRIDGE ASSEMBLY AND SUPPORT FOR SWITCH THEREFOR

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102159960B1 (ko) * 2019-02-22 2020-09-25 엘에스일렉트릭(주) 극 부품 및 이를 포함하는 차단기

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113043A (en) * 1991-02-25 1992-05-12 General Electric Company Circuit breaker safety interlock unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5113043A (en) * 1991-02-25 1992-05-12 General Electric Company Circuit breaker safety interlock unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016179156A1 (en) * 2015-05-07 2016-11-10 Eaton Corporation Electrical switching apparatus and trip assembly therefor
US9715972B2 (en) 2015-05-07 2017-07-25 Eaton Corporation Electrical switching apparatus and trip assembly therefor
WO2019058206A1 (en) * 2017-09-25 2019-03-28 Eaton Intelligent Power Limited CIRCUIT SWITCH, TRIGGER BRIDGE ASSEMBLY AND SUPPORT FOR SWITCH THEREFOR
US11195682B2 (en) 2017-09-25 2021-12-07 Eaton Intelligent Power Limited Circuit interrupter, trip deck assembly, and support for switch therefor

Also Published As

Publication number Publication date
DE602005013874D1 (de) 2009-05-28
EP1643527A3 (de) 2007-07-25
CN100585768C (zh) 2010-01-27
EP1643527B1 (de) 2009-04-15
CN1761012A (zh) 2006-04-19
ZA200507950B (en) 2006-06-28
ATE429026T1 (de) 2009-05-15
CA2521677A1 (en) 2006-04-01
CA2521677C (en) 2013-01-22

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