WO1998053473A1 - 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 PDF

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Publication number
WO1998053473A1
WO1998053473A1 PCT/EP1998/002557 EP9802557W WO9853473A1 WO 1998053473 A1 WO1998053473 A1 WO 1998053473A1 EP 9802557 W EP9802557 W EP 9802557W WO 9853473 A1 WO9853473 A1 WO 9853473A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuation
lever
kinematic system
spring
actuating
Prior art date
Application number
PCT/EP1998/002557
Other languages
French (fr)
Inventor
Domenico Bosatelli
Augusto Contardi
Sergio Pianezzola
Original Assignee
Gewiss S.P.A.
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 Gewiss S.P.A. filed Critical Gewiss S.P.A.
Priority to EP98924252A priority Critical patent/EP0914666B1/en
Priority to AU76513/98A priority patent/AU7651398A/en
Priority to AT98924252T priority patent/ATE298459T1/en
Priority to DE69830637T priority patent/DE69830637T2/en
Publication of WO1998053473A1 publication Critical patent/WO1998053473A1/en

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
    • H01H71/50—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 ac tuat ing t he movab l e c ont ac t o f automat i c e l ect ri c breakers .
  • 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.
  • a kinematic system for actuating the movable contact particularly for automatic electric breakers, characterized in that it includes an actuation mechanism which includes an actuation means which is pivoted to the body of a breaker and is connected to the cross-member, which is in turn connected to an actuation lever which is operatively associated with a reset spring and with an actuation spring, both of which are coupled to a common pivot; a mushroom-shaped part of a relay of the breaker acting on a reset lever which is in turn kinematically associated with a hook supported by the common pivot; an engagement lever, retained by the hook, being suitable to act on the rear part of a traction lever.
  • 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.
  • 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; all the details may furthermore be replaced with other technically equivalent parts.
  • the materials used, as well as the dimensions, may of course be any according to the requirements and the state of the art.

Landscapes

  • Breakers (AREA)
  • Electronic Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Push-Button Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

A kinematic system for actuating the movable contact of automatic electric breakers includes an actuation mechanism (5) which includes an external handle (9) which is pivoted to the body (3) of a breaker and is connected to the cross-member (13), which is in turn connected to an actuation lever (15) which is operatively associated with a reset spring (17) and with an actuation spring (19), both of which are coupled to a common pivot (21); a mushroom-shaped member (23) of a relay of the breaker acts 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 the hook, is suitable to act on the rear part of a traction lever (33).

Description

Kinematic system for actuating the movable contact of automatic electric breakers .
The present invention relates to a kinematic system for ac tuat ing t he movab l e c ont ac t o f automat i c e l ect ri c 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.
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, particularly for automatic electric breakers, characterized in that it includes an actuation mechanism which includes an actuation means which is pivoted to the body of a breaker and is connected to the cross-member, which is in turn connected to an actuation lever which is operatively associated with a reset spring and with an actuation spring, both of which are coupled to a common pivot; a mushroom-shaped part of a relay of the breaker acting on a reset lever which is in turn kinematically associated with a hook supported by the common pivot; an engagement lever, retained by the hook, being suitable to act on the rear part of a traction lever.
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 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 operation of the kinematic system is as follows.
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 reset spring 17, by loading, releases the reset 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 the hook 27. In this manner, 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. In this manner, 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.
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 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.
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; all the details may furthermore be replaced with other technically equivalent parts.
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

1. Kinematic system for actuating the movable contact of automatic electric breakers, characterized in that it comprises an actuation mechanism (5) which comprises an actuation means (9) which is pivoted to the body of a breaker (100) and is connected to a cross-member (13), which is in turn connected to an actuation lever (15) which is operatively associated with a reset spring (17) and with an actuation spring (19), both of which are coupled to a first common pivot (21); 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 the hook, being suitable to act on the rear part of a traction lever (33).
2. Kinematic system for actuating the movable contact, according to claim 1, characterized in that said engagement lever (31) is connected to an indicator which is pivoted to said actuation means.
3. Kinematic system for actuating the movable contact, according to claim 1 or 2, characterized in that it comprises a test circuit mechanism which comprises a test button (37) which is suitable to act on a contact spring (41), and a fixed contact (43) which is 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.
PCT/EP1998/002557 1997-05-20 1998-04-30 Kinematic system for actuating the movable contact of automatic electric breakers WO1998053473A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98924252A EP0914666B1 (en) 1997-05-20 1998-04-30 Kinematic system for actuating the movable contact of automatic electric breakers
AU76513/98A AU7651398A (en) 1997-05-20 1998-04-30 Kinematic system for actuating the movable contact of automatic electric breakers
AT98924252T ATE298459T1 (en) 1997-05-20 1998-04-30 KINEMATIC SYSTEM FOR CONTROLLING THE MOVING CONTACT FOR AN AUTOMATIC LOAD SWITCH
DE69830637T DE69830637T2 (en) 1997-05-20 1998-04-30 KINEMATIC SYSTEM FOR CONTROLLING MOVABLE CONTACT FOR AN AUTOMATIC LOAD SWITCH

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI001171A IT1292339B1 (en) 1997-05-20 1997-05-20 MOVING CONTACT ACTIVATION KINEMATICS PARTICULARLY FOR AUTOMATIC ELECTRIC SWITCHES
ITMI97A001171 1997-05-20

Publications (1)

Publication Number Publication Date
WO1998053473A1 true WO1998053473A1 (en) 1998-11-26

Family

ID=11377167

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/002557 WO1998053473A1 (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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1069586A2 (en) * 1999-07-15 2001-01-17 Power Controls Iberica, SL Tripping mechanism for automatic switches
EP1995754A1 (en) * 2007-05-23 2008-11-26 Abb Ag Electric installation switching device
EP2485237A1 (en) * 2011-02-08 2012-08-08 Siemens Aktiengesellschaft Residual current protection switch
EP2889893A1 (en) 2013-12-27 2015-07-01 Legrand France Electrical appliance in modular format

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224396A1 (en) * 1985-10-31 1987-06-03 Merlin Gerin Control mechanism for a low-tension electric circuit breaker
EP0325071A1 (en) * 1988-01-20 1989-07-26 Hager Electro S.A. Protection device for electrical installations
EP0338930A1 (en) * 1988-04-22 1989-10-25 Hager Electro S.A. Circuit breakers or differential circuit breakers
EP0506503A1 (en) * 1991-03-29 1992-09-30 Hager Electro S.A. Locking mechanism for circuit breaker
EP0564380A1 (en) * 1992-03-31 1993-10-06 Schneider Electric Sa Operating mechanism with slide for electrical circuit breakers with switching for the neutral conductor
EP0570647A1 (en) * 1992-05-13 1993-11-24 Hager Electro S.A. Switch latch for a circuit breaker and circuit breakers incorporating it

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0224396A1 (en) * 1985-10-31 1987-06-03 Merlin Gerin Control mechanism for a low-tension electric circuit breaker
EP0325071A1 (en) * 1988-01-20 1989-07-26 Hager Electro S.A. Protection device for electrical installations
EP0338930A1 (en) * 1988-04-22 1989-10-25 Hager Electro S.A. Circuit breakers or differential circuit breakers
EP0506503A1 (en) * 1991-03-29 1992-09-30 Hager Electro S.A. Locking mechanism for circuit breaker
EP0564380A1 (en) * 1992-03-31 1993-10-06 Schneider Electric Sa Operating mechanism with slide for electrical circuit breakers with switching for the neutral conductor
EP0570647A1 (en) * 1992-05-13 1993-11-24 Hager Electro S.A. Switch latch for a circuit breaker and circuit breakers incorporating it

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1069586A2 (en) * 1999-07-15 2001-01-17 Power Controls Iberica, SL Tripping mechanism for automatic switches
EP1069586A3 (en) * 1999-07-15 2005-11-16 Power Controls Iberica, SL Tripping mechanism for automatic switches
EP1995754A1 (en) * 2007-05-23 2008-11-26 Abb Ag Electric installation switching device
US7839241B2 (en) 2007-05-23 2010-11-23 Abb Ag Electrical service switching device
EP2485237A1 (en) * 2011-02-08 2012-08-08 Siemens Aktiengesellschaft Residual current protection switch
EP2889893A1 (en) 2013-12-27 2015-07-01 Legrand France Electrical appliance in modular format

Also Published As

Publication number Publication date
ATE298459T1 (en) 2005-07-15
ITMI971171A1 (en) 1998-11-20
EP0914666A1 (en) 1999-05-12
ITMI971171A0 (en) 1997-05-20
EP0914666B1 (en) 2005-06-22
AU7651398A (en) 1998-12-11
DE69830637T2 (en) 2006-05-11
IT1292339B1 (en) 1999-01-29
DE69830637D1 (en) 2005-07-28
ES2241140T3 (en) 2005-10-16

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