EP0914666B1 - Kinematic system for actuating the movable contact of automatic electric breakers - Google Patents
Kinematic system for actuating the movable contact of automatic electric breakers Download PDFInfo
- Publication number
- EP0914666B1 EP0914666B1 EP98924252A EP98924252A EP0914666B1 EP 0914666 B1 EP0914666 B1 EP 0914666B1 EP 98924252 A EP98924252 A EP 98924252A EP 98924252 A EP98924252 A EP 98924252A EP 0914666 B1 EP0914666 B1 EP 0914666B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuation
- lever
- kinematic system
- spring
- breaker
- 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.)
- Expired - Lifetime
Links
Images
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
- H01H71/50—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
-
- 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
-
- 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
- H01H2083/045—Auxiliary switch opening testing circuit in synchronism with the main circuit
-
- 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
- H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
Definitions
- the present invention relates to a kinematic system for actuating the movable contact of automatic electric breakers.
- EP-A-0224396 discloses a control mechanism for low tension electric breakers wherein a kinematic system actuates the release of the movable contact.
- the aim of the present invention is to provide a kinematic system for actuating the movable contact, particularly for automatic electric breakers, which has a simplified construction with respect to the known art.
- An object of the invention is to provide a kinematic system whose assembly is simplified.
- Another object is to provide a kinematic system which is more reliable than conventional ones.
- a kinematic system for actuating the movable contact of automatic electric breakers comprising an actuation mechanism which has an actuation means pivoted to the body of a breaker and connected to a cross-member which is in turn connected to an actuation lever operatively associated with an actuation spring coupled to a first common pivot; said actuation lever being further operatively associated with a reset spring coupled to said first common pivot; said system comprising a mushroom-shaped member of a relay of the breaker acting on a reset lever which is in turn kinematically associated with a hook supported by a second common pivot; an engagement lever, retained by said hook, being adapted to act on the rear part of a traction lever allowing the release of said kinematic system; characterized in that it comprises an indicator connected to said engagement lever and pivoted to said actuation means.
- a kinematic actuation system particularly for electric breakers, according to the invention, generally designated by the reference numeral 1, includes a case body 3 which is constituted for example by the ordinary case body of a residual current operated breaker 100 which is adapted to be associated with conventional omega-shaped bars.
- the kinematic system 1 includes an actuation mechanism 5 for the residual current operated breaker, shown in Figs. 3-10, and a test circuit mechanism 7, shown in Figs. 11-16.
- the actuation mechanism includes an actuation means which is constituted for example by a conventional handle 9 which is pivoted to the body 3 and is connected to an actuation lever 11 by a U-shaped cross-member 13.
- the actuation lever 11 is connected to the kinematic system of the automatic breaker, shown schematically in Fig. 1.
- the cross-member 13 is connected to an actuation lever 15 which is operatively associated with a reset spring 17 and with an actuation spring 19 on a common pivot 21.
- a mushroom-shaped member 23 of the relay acts on a reset lever 25 which is in turn kinematically associated with a hook 27 which is supported by a second common pivot 29 and is provided with a return spring 47.
- An engagement lever 31, retained by the hook 27, is suitable to act on the rear part of a traction lever 33.
- the engagement lever 31 is connected to an indicator 35 which is pivoted to the handle 9 and is provided with a return spring 49.
- the mechanism 7 of the test circuit is shown in greater detail in Figs. 11-16 and includes a test button 37 which is suitable to act on a test strip 39 which acts on a contact spring 41.
- the fixed contact 43 is connected to the pivot 21 by means of the actuation spring 19 and to a resistor 45 by means of the contact spring 41.
- the resistor 45 is in turn connected to the terminal.
- the cross-member 13 By turning the handle 9, the cross-member 13 is moved and turns the actuation lever 11, which acts on the kinematic system of the automatic breaker.
- the cross-member 13 is also rigidly coupled to the actuation lever 15, which in the closing action turns and loads the reset spring 17 and the actuation spring 19.
- the mushroom-shaped part of the relay pushes the reset lever 25, which by moving down shifts the hook 27.
- the engagement lever 31 is released and turns; by striking the rear part of the traction lever 33, the engagement lever 31 allows the release of the kinematic system of the automatic breaker.
- the engagement lever 31 also disengages the indicator 35, which in the closed position was rigidly coupled to its rear part. Resetting occurs immediately after tripping: when the handle 9 returns, the actuation spring 19 turns the actuation lever 15 in the opposite direction with respect to the closure rotation.
- the actuation lever repositions the engagement lever 31 by virtue of their physical coupling, returning its lower end into the seat of the hook 27, while the reset spring 17 repositions the reset lever 25, resetting the relay with a force which is linked to the return speed of the handle 9 and is therefore calibrated. It is noted that during resetting the indicator 35 is still active and is deactivated only after the first closure.
- test circuit entails the simulation of a residual current in order to check the operation of the relay and of the breaker.
- the test button 37 When the test button 37 is raised, the circuit is open and the contact spring 41 in fact does not touch the pivot 21. By actuating the test button in the direction indicated by the arrows in the figures, the contact spring 41 is lowered, closing the circuit. It should be noted that when the differential kinematic system has tripped, the test circuit must not be usable, otherwise the resistor 45 would burn out.
- Disabling of the test circuit is achieved in two ways: either by lifting the contact spring 41 by means of the engagement lever 31, which by rotating lifts the lower part of the contact spring 41, or by virtue of the insulation of the pivot 21 obtained by the rotation of the seat of the pivot in the actuation lever 15, when the knob 9 is in the open position.
- kinematic actuation system of the movable contact particularly for automatic electric breakers, according to the invention, is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept as defined in the appended claims.
- the materials used, as well as the dimensions, may of course be any according to the requirements and the state of the art.
Abstract
Description
- The present invention relates to a kinematic system for actuating the movable contact of automatic electric breakers.
- Kinematic systems have long been used in automatic electric breakers and allow to open and close the movable contact both by actuating an external handle which can be accessed by the user and by virtue of the automatic intervention of the protection devices provided internally.
- The two constant problems in the design of these kinematic systems are the complexity of the mechanisms and the dimensions.
- There is a constantly felt need to simplify the kinematic system from the constructive point of view in order to achieve low-cost production, and in this regard it is very important to try to achieve simple and automatable assembly.
- EP-A-0224396 discloses a control mechanism for low tension electric breakers wherein a kinematic system actuates the release of the movable contact.
- The aim of the present invention is to provide a kinematic system for actuating the movable contact, particularly for automatic electric breakers, which has a simplified construction with respect to the known art.
- An object of the invention is to provide a kinematic system whose assembly is simplified.
- Another object is to provide a kinematic system which is more reliable than conventional ones.
- This aim, these objects and others which will become apparent hereinafter are achieved by a kinematic system for actuating the movable contact of automatic electric breakers comprising an actuation mechanism which has an actuation means pivoted to the body of a breaker and connected to a cross-member which is in turn connected to an actuation lever operatively associated with an actuation spring coupled to a first common pivot; said actuation lever being further operatively associated with a reset spring coupled to said first common pivot; said system comprising a mushroom-shaped member of a relay of the breaker acting on a reset lever which is in turn kinematically associated with a hook supported by a second common pivot; an engagement lever, retained by said hook, being adapted to act on the rear part of a traction lever allowing the release of said kinematic system; characterized in that it comprises an indicator connected to said engagement lever and pivoted to said actuation means.
- Further characteristics and advantages will become apparent from the description of a preferred but not exclusive embodiment of the invention, illustrated only by way of non- limitative example in the accompanying drawings, wherein:
- Fig. 1 is a schematic perspective view of the breaker with a wall of the box-like body removed in order to clearly show the components;
- Fig. 2 is an exploded perspective view of the kinematic system for the actuation of the residual current operated breaker;
- Figs. 3 and 4 are views, taken from opposite sides, of the kinematic actuation system of the residual current operated breaker in the open position;
- Figs. 5 and 6 are views, similar to the preceding ones, of the kinematic system for actuating the residual current operated breaker in the closed position;
- Figs. 7 and 8 are views, similar to the preceding ones, of the kinematic system in the tripped position, with the lever still in the closed position:
- Figs. 9 and 10 are views, similar to the preceding ones, of the kinematic system in the tripped position and with the contact open;
- Figs. 11 and 12 are views, taken from mutually opposite sides, of the mechanism of the test circuit with the breaker in closed position;
- Figs. 13 and 14 are views, similar to the preceding ones, of the mechanism of the test circuit with the breaker in tripped position;
- Figs. 15 and 16 are views, similar to the preceding ones, of the mechanism of the test circuit with the breaker in the open position.
-
- With reference to the above figures, a kinematic actuation system, particularly for electric breakers, according to the invention, generally designated by the reference numeral 1, includes a
case body 3 which is constituted for example by the ordinary case body of a residual current operatedbreaker 100 which is adapted to be associated with conventional omega-shaped bars. - The kinematic system 1 includes an
actuation mechanism 5 for the residual current operated breaker, shown in Figs. 3-10, and a test circuit mechanism 7, shown in Figs. 11-16. - The actuation mechanism includes an actuation means which is constituted for example by a
conventional handle 9 which is pivoted to thebody 3 and is connected to anactuation lever 11 by aU-shaped cross-member 13. Theactuation lever 11 is connected to the kinematic system of the automatic breaker, shown schematically in Fig. 1. Thecross-member 13 is connected to anactuation lever 15 which is operatively associated with areset spring 17 and with anactuation spring 19 on acommon pivot 21. - A mushroom-
shaped member 23 of the relay acts on areset lever 25 which is in turn kinematically associated with ahook 27 which is supported by a secondcommon pivot 29 and is provided with areturn spring 47. Anengagement lever 31, retained by thehook 27, is suitable to act on the rear part of atraction lever 33. Theengagement lever 31 is connected to anindicator 35 which is pivoted to thehandle 9 and is provided with areturn spring 49. - The mechanism 7 of the test circuit is shown in greater detail in Figs. 11-16 and includes a
test button 37 which is suitable to act on atest strip 39 which acts on acontact spring 41. The fixedcontact 43 is connected to thepivot 21 by means of theactuation spring 19 and to aresistor 45 by means of thecontact spring 41. Theresistor 45 is in turn connected to the terminal. - The operation of the kinematic system is as follows.
- By turning the
handle 9, thecross-member 13 is moved and turns theactuation lever 11, which acts on the kinematic system of the automatic breaker. Thecross-member 13 is also rigidly coupled to theactuation lever 15, which in the closing action turns and loads thereset spring 17 and theactuation spring 19. Thereset spring 17, by loading, releases thereset lever 25, which can thus be pushed by the mushroom-shaped member 23 of the relay in case of activation. - In case of activation, the mushroom-shaped part of the relay pushes the
reset lever 25, which by moving down shifts thehook 27. In this manner, theengagement lever 31 is released and turns; by striking the rear part of thetraction lever 33, theengagement lever 31 allows the release of the kinematic system of the automatic breaker. Theengagement lever 31 also disengages theindicator 35, which in the closed position was rigidly coupled to its rear part. Resetting occurs immediately after tripping: when thehandle 9 returns, theactuation spring 19 turns theactuation lever 15 in the opposite direction with respect to the closure rotation. In this manner, the actuation lever repositions theengagement lever 31 by virtue of their physical coupling, returning its lower end into the seat of thehook 27, while thereset spring 17 repositions thereset lever 25, resetting the relay with a force which is linked to the return speed of thehandle 9 and is therefore calibrated. It is noted that during resetting theindicator 35 is still active and is deactivated only after the first closure. - The operation of the test circuit entails the simulation of a residual current in order to check the operation of the relay and of the breaker. When the
test button 37 is raised, the circuit is open and thecontact spring 41 in fact does not touch thepivot 21. By actuating the test button in the direction indicated by the arrows in the figures, thecontact spring 41 is lowered, closing the circuit. It should be noted that when the differential kinematic system has tripped, the test circuit must not be usable, otherwise theresistor 45 would burn out. Disabling of the test circuit is achieved in two ways: either by lifting thecontact spring 41 by means of theengagement lever 31, which by rotating lifts the lower part of thecontact spring 41, or by virtue of the insulation of thepivot 21 obtained by the rotation of the seat of the pivot in theactuation lever 15, when theknob 9 is in the open position. - In practice it has been found that the invention achieves the intended aim and objects.
- The kinematic actuation system of the movable contact, particularly for automatic electric breakers, according to the invention, is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept as defined in the appended claims.
- The materials used, as well as the dimensions, may of course be any according to the requirements and the state of the art.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the scope of each element identified by way of example by such reference signs.
Claims (2)
- Kinematic system for actuating the movable contact of automatic electric breakers comprising an actuation mechanism (5) which has an actuation means (9) pivoted to the body of a breaker (100) and connected to a cross-member (13) which is in turn connected to an actuation lever (15) operatively associated with an actuation spring (19) coupled to a first common pivot (21); said actuation lever (15) being further operatively associated with a reset spring (17) coupled to said first common pivot (21); said system comprising a mushroom-shaped member (23) of a relay of the breaker acting on a reset lever (25) which is in turn kinematically associated with a hook (27) supported by a second common pivot (29); an engagement lever (31), retained by said hook (27), being adapted to act on the rear part of a traction lever (33) allowing the release of said kinematic system;
characterized in that it comprises an indicator (35) connected to said engagement lever (31) and pivoted to said actuation means. - Kinematic system for actuating the movable contact, according to claim 1, characterized in that it comprises a test circuit mechanism comprising a test button (37) adapted to act on a contact spring (41), and a fixed contact (43) coupled to said first common pivot (21) by said actuation spring (19) and to a resistor (45) by means of said contact spring (41), said resistor being connected to a terminal of the breaker.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI971171 | 1997-05-20 | ||
IT97MI001171A IT1292339B1 (en) | 1997-05-20 | 1997-05-20 | MOVING CONTACT ACTIVATION KINEMATICS PARTICULARLY FOR AUTOMATIC ELECTRIC SWITCHES |
PCT/EP1998/002557 WO1998053473A1 (en) | 1997-05-20 | 1998-04-30 | Kinematic system for actuating the movable contact of automatic electric breakers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0914666A1 EP0914666A1 (en) | 1999-05-12 |
EP0914666B1 true EP0914666B1 (en) | 2005-06-22 |
Family
ID=11377167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98924252A Expired - Lifetime EP0914666B1 (en) | 1997-05-20 | 1998-04-30 | Kinematic system for actuating the movable contact of automatic electric breakers |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0914666B1 (en) |
AT (1) | ATE298459T1 (en) |
AU (1) | AU7651398A (en) |
DE (1) | DE69830637T2 (en) |
ES (1) | ES2241140T3 (en) |
IT (1) | IT1292339B1 (en) |
WO (1) | WO1998053473A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2157161B1 (en) * | 1999-07-15 | 2002-02-16 | Power Controls Iberica Sl | TRIGGER MECHANISM FOR AUTOMATIC SWITCHES. |
EP1995754B1 (en) * | 2007-05-23 | 2013-09-04 | Abb Ag | Electric installation switching device |
DE102011003801A1 (en) * | 2011-02-08 | 2012-08-09 | Siemens Aktiengesellschaft | Residual Current Device |
FR3016078A1 (en) | 2013-12-27 | 2015-07-03 | Legrand France | ELECTRICAL EQUIPMENT WITH MODULAR FORMAT |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2589627B1 (en) * | 1985-10-31 | 1988-08-26 | Merlin Gerin | CONTROL MECHANISM FOR LOW VOLTAGE ELECTRIC CIRCUIT BREAKER |
FR2626105B1 (en) * | 1988-01-20 | 1990-06-15 | Hager Electro | ELECTRICAL PROTECTION APPARATUS |
EP0338930A1 (en) * | 1988-04-22 | 1989-10-25 | Hager Electro S.A. | Circuit breakers or differential circuit breakers |
FR2674679B1 (en) * | 1991-03-29 | 1994-06-17 | Hager Electro | LOCK MECHANISM FOR CIRCUIT BREAKER. |
FR2689309B1 (en) * | 1992-03-31 | 1994-05-20 | Merlin Gerin | DRAWER CONTROL MECHANISM FOR NEUTRAL PHASE AND ELECTRIC CIRCUIT BREAKER. |
EP0570647B1 (en) * | 1992-05-13 | 1994-03-02 | Hager Electro S.A. | Switch latch for a circuit breaker and circuit breakers incorporating it |
-
1997
- 1997-05-20 IT IT97MI001171A patent/IT1292339B1/en active IP Right Grant
-
1998
- 1998-04-30 AU AU76513/98A patent/AU7651398A/en not_active Abandoned
- 1998-04-30 WO PCT/EP1998/002557 patent/WO1998053473A1/en active IP Right Grant
- 1998-04-30 EP EP98924252A patent/EP0914666B1/en not_active Expired - Lifetime
- 1998-04-30 AT AT98924252T patent/ATE298459T1/en not_active IP Right Cessation
- 1998-04-30 ES ES98924252T patent/ES2241140T3/en not_active Expired - Lifetime
- 1998-04-30 DE DE69830637T patent/DE69830637T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE298459T1 (en) | 2005-07-15 |
EP0914666A1 (en) | 1999-05-12 |
ITMI971171A0 (en) | 1997-05-20 |
ITMI971171A1 (en) | 1998-11-20 |
IT1292339B1 (en) | 1999-01-29 |
ES2241140T3 (en) | 2005-10-16 |
DE69830637T2 (en) | 2006-05-11 |
AU7651398A (en) | 1998-12-11 |
WO1998053473A1 (en) | 1998-11-26 |
DE69830637D1 (en) | 2005-07-28 |
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