EP0130208A1 - Switch with controlled closing and opening and automatic opening in case of current overloads. - Google Patents
Switch with controlled closing and opening and automatic opening in case of current overloads.Info
- Publication number
- EP0130208A1 EP0130208A1 EP84900390A EP84900390A EP0130208A1 EP 0130208 A1 EP0130208 A1 EP 0130208A1 EP 84900390 A EP84900390 A EP 84900390A EP 84900390 A EP84900390 A EP 84900390A EP 0130208 A1 EP0130208 A1 EP 0130208A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- contacts
- contact
- magnetic part
- axis
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
- H01H77/101—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening with increasing of contact pressure by electrodynamic forces before opening
Definitions
- the present invention relates to a switch with closing and opening controlled by a control member such as an electromagnet and with automatic opening in the event of current overload passing through this switch.
- switches such as contactors whose movable contact is directly connected to the armature of an electromagnet which controls the movement of this movable contact against the action of return means, between a closed position. and an open position of the contacts.
- NEET means for controlling automatic 1'aji contacts, independently of the action of the electromagnet, when the intensity of the current traversing the switch exceeds a threshold voltagedéter ⁇ undermined.
- These means may consist of a magnetic piece concentrating the field in a loop current to increase an intensity of repulsion forces exerted on the movable contact. Is it ensured that automatic opening of the contacts when the intensity exceeds a predetermined value which is generally of the order of thirty to forty times? ". '.: _. Nominal frequency.
- This type of switch thus has the following two different operating modes:
- the apparatus described in this patent application comprises several switches with a rigid contact bridge cooperating with fixed contacts carried respectively by conductors commu ⁇ nicking repulsion forces at the contact bridge. Furthermore, the central region of the bridge cooperates with a magnetic structure providing the bridge with compensating orifices for contact pressure below a certain threshold; beyond this threshold the bridge is very quickly separated from the fixed contacts.
- this known device only involves this magnetic structure in order to reveal an additional contact pressure force which is directly opposite to the electro-dynamic repulsion forces.
- the object of the present invention is to re-
- the switch targeted by the invention with closing and opening controlled by a control member such as an electromagnet and with automatic opening in the event of a current overload passing through this switch comprises a fixed contact, and a contact mobile subject to the action of a magnetic part which makes it possible to reinforce the contact pressure of the mobile contact on the fixed contact. below a certain current threshold as well as a mechanical threshold device which is triggered by ensuring the opening of the contacts when the magnetic part exerts on the movable contact a force which exceeds that corresponding to the threshold of the aforementioned current.
- this switch is characterized in that the movable contact is por'ed by a lever pivoting about a first articulation axis integral with the control member, the end of this lever opposite to that carrying the movable contact comprising a second articulation axis which is connected to the mechanical threshold device, this second articulation axis being able to move between a normal position which is mainte ⁇ naked by the threshold device and in which the movable contact bears against the fixed contact under the action of a spring, and a position of
- This switch operates as follows: as long as the intensity passing through the interrupter does not reach the desired cut-off threshold, the second axis of articulation of the pivoting lever is held stationary by the threshold device.
- the magnetic part exerts on the lever an electromagnetic force which tends to reinforce the contact pressure and thus to avoid any risk of welding of these.
- the intensity passing through the switch exceeds the desired threshold, the force exerted by the magnetic piece on the lever exceeds the force & r, reaction of the threshold device, so that the second axis of articulation of the lever is deso ⁇ lidarise of the threshold device and thus the lever pivots by rc-Latrion around its first articula ⁇ tion, which causes the opening of the contacts.
- the axis of articulation of the lever which is integral with the control member is mounted with a certain axial clearance relative to the lever or to this control member so that this lever can pivot at a small angle towards the magnet part by rotation around the contact support point after the triggering of the threshold device. Thanks to this play, the lever has a certain degree of freedom with respect to its first axis of articulation and thus the force exerted by the magnetic part on the lever causes a reinforcement of the pressure of the contacts, before triggering of the device to threshold.
- the mechanical threshold device comprises a spring bearing against said second axis of articulation of the lever, said spring forming with the longitudinal direction of the lever an obtuse angle open towards the magnetic part when the contacts are closed and this spring forming an obtuse ou ⁇ green angle in a direction opposite to the magnetic part when the contacts are open.
- the mechanical threshold device comprises two balls arranged side by side and projecting laterally from a holding cage fixed to the lever, these two balls being normally engaged respectively in openings made in two articulated blades to a fixed support and extending on either side of the lever, these blades bearing on the balls through the openings on the effect of a spring.
- FIG. 1 is a longitudinal sectional view of a remote controlled switch, according to the invention, 1 * electro ⁇ magnet being in the active position and the contacts being closed;
- FIG. 2 is a view similar to FIG. 1,
- FIG. 3 is a partial longitudinal sectional view of the switch where the movable contact is in start of automatic opening phase when the electromagnet is in the active position;
- Figure 4 is a view similar to Figure 3, the movable contact being in the fully open position?
- FIG. 5 is a partial sectional view along the plane V-V of Figure 3;
- FIG. 6 is a partial sectional view along the plane VI-VI of Figure 3;
- - Figure 7 is a longitudinal sectional view of a second version of a switch according to one invention;
- FIG. 8 is a partial sectional view along the plane VIII-VIII of Figure 7;
- - Figure 9 is a partial sectional view along the plane IX-IX of Figure 7;
- FIG. 10 is a perspective view showing one of the parts of the device shown in Figure 9;
- - Figure 11 is an enlarged view of detail A of Figure 9;
- FIG. 12 is a view similar to Figure 9, showing the operation of the device
- FIG. 13 is a sectional view along the plane VII-VII of Figure 7;
- FIGS. 14 to 17 are diagrams which illustrate the operation of one switch according to Figure 7.
- the interrupter comprises an outer box 1, made of electrically insulating material, containing three juxtaposed switches, each comprising a fixed contact 2 and a movable contact 3 carried by a pivoting lever 4.
- This lever 4 and the fixed contact 2 are respectively connected to terminals 5 and 6 by conductors 5a, 6a.
- a arc blowing chamber 11 Inside the housing 1 and opposite the contacts 2 and 3, is disposed a arc blowing chamber 11, of conventional conformation. Ei look of the housing 1 is arranged an electromagnet 6 whose movable armature 7 is connected to the pivoting lever 4, by means of a coupling piece 8 and a movable contact carrier 9 both integral with the latter.
- This contact carrier 9 carries a hinge pin 10, on which the contact lever 4 is mounted.
- the electro-ai ⁇ mant 6 controls the movement of the contact lever 4, - between a closed position of the contacts 2, 3 as shown in FIG. 1 and an open position of these contacts (see figure 2).
- the invention also provides means for controlling the opening of the contacts 2, 3, independently of the action of the electromagnet 6, when the intensity of the current passing through the contacts exceeds a threshold. predetermined, equal for example to thirty or forty times the nominal intensity and means for strengthening ⁇ , the contact pressure below this threshold.
- the contact carrier 9 comprises.on aa face facing the contact lever 4, between the hinge pin 10 and the end 4a of this lever- opposite the contact 3, a magnetic piece 12 of dry ⁇ transverse U-shaped (see also Figures 5 and 6).
- the .contact lever 4 is engaged in the housing 13 defined by the U-shaped section of the magnetic part 12.
- the contact lever 4 includes a slot 14 determining a certain radial clearance e with the articulation axis crossing it.
- this clearance is presented in the direction D of opening of the contacts relative to the articulation 10.
- the end 4a of the contact lever 4 opposite the contacts 2, 3 carries an axis 15 to which is articulated a connecting rod 16, itself articulated by an oblong opening 16a at its end opposite to the lever 4 on a fixed axis 17 and therefore with a headset R.
- a spring 18 which exerts an elastic force against the ex ⁇ end 4a of the lever 4.
- the axis 15 of the rod 16 is housed in a groove 15a which guides the movement of this axis between a normal position such that represented in FIG. 1 and a triggered position shown, in FIG. 4.
- the direction R of the spring 18 forms with the direction L of the lever 4, an obtuse angle open in the D rection D of opening of the contacts 2, 3, this obtuse angle being smaller when the electromagnet 6 is in the inactive position only when it is still in the active position (see Figure 2).
- This spring 19 exerts on the lever 4 a force that is substantially perpendicular to the longitudinal direction L of the lever 4 to apply the movable contact to the fixed contact with a suitable pressure when the electromagnet is active.
- the spring 18, the articulation 17, 16a, the groove 15a and the axis 15 constitute a device with a mechanical threshold which is triggered by ensuring the opening of the contacts 2, 3 when the magnetic piece 12 exerts on the lever 4, under the effect of the magnetic field created during the passage of a current of predetermined value through the switch, a force which exceeds those which hold this lever in the closed position as is explains in more detail below.
- the magnetic attraction force exerted between the lever 4 and the magnetic piece 12 is sufficient to trigger the threshold device constituted by the spring 18.
- the lever 4 then begins to rotate by rotation around the point of contact between the contacts 2 and 3, at a small angle until the clearance e defined by the light 14 is eliminated.
- the current carrier 9 is er> J _ra ⁇ né by return springs of the frame 7 to the right of the fi ⁇ gure so that the axis 10 and the fulcrum 13a of the part 12 first correct the lever 4 with a translational movement to the right which drives the axis 15 towards the right bottom of the groove 15a; when " 1-" a neutral position is exceeded, for which the directions R and L are aligned, the action of the spring 18 on the axis 15 communicates to the lever 4 a slight clockwise rotation around the pivot 10 at the end of which this axis 15 abuts on the right bottom of the groove 15a, so that the different parts return to the respective positions illustrated in FIG. 2.
- the opening time of the contacts 2, 3 is extremely short, and is much shorter than the response time of the electromagnet 6.
- the articulation axis 15 connected to the threshold device constituted by the spring 18 can move between a normal rest position which is maintained against the right bottom of the groove 15a thanks to the action of the spring 18 (see FIG. 1) and a triggering position in 1- the hinge axis 15 is held towards the left bottom of this groove (see FIG. -t).
- the switch according to the invention has a breaking capacity which can reach 100 effective KA with an absolute guarantee of non-welding of the contacts for intensities between 160 and 800 A approximately.
- the controlled-opening switch comprises, as in the case of the previous embodiment, an insulating housing 21 containing a fixed contact 22 and a movable contact 23 carried by a pivoting lever 24, articulated on an axis. 25.
- This axis 25 is fixed to the end of a contact carrier 26, made integral with the armature 28 of the electromagnet 29 by means of a coupling piece 30.
- the contact carrier 26 carries also a magnetic U-shaped piece 31 in the housing of which is engaged the part of the lever 24 situated behind the hinge pin 25 relative to the movable contact 23 (see also FIG. 8).
- an arc blowing chamber 22 is located opposite the contacts 22, 23.
- the end 24a of the lever 24 opposite the contact 23 carries a mechanical threshold device 37.
- OMP sitive comprises (see FIG. 9) two balls 39 projecting laterally outside a cage 40 carried by the end 24a of the lever 24.
- These two blades 42 are articulated to two fixed supports 38.
- the two articulation axes 43 of the blades 42 to the fixed supports 38 extend substantially parallel to the direction of the lever 24, in the position shown in FIG. 7.
- the magnetic attraction force exerted between the lever 24 and the magnetic pieces 31 and 45 balance the reaction force of the threshold device 37, i.e. the force according to which the marbles
- the balls 39 escape from the openings 41 by spreading the blades 42 outwards as indicated in - Figure 12, by compressing the spring 44.
- the lever. 24 first begins to pivot slightly towards the magnetic part 31 by rotation around the contact point of the contacts 22, 23 (see FIG. 15) until the clearance defined by the light 36 is eliminated.
- the lever 24 then continues to pivot towards the magnetic part 31 by rotation about its axis 25 and takes the position indicated in dashed lines in Figure 7 or represented in the diagram of Figure 16. In this position, the balls 39 (see figure
- the armature 28 of the electromagnet 29 then moves the lever 24 to position b shown in phantom in Figure 7 (see also Figure 17).
- this lever pivots forward around its articulation axis 25.
- the balls 39 carried by the rear end 24a of the lever 24 move between the blades 42 towards the spring of recall 44 and snap back into the openings 41.
- the threshold device 37 is thus rearmed again.
- the threshold device 37 can move between a normal rest position which is maintained by the snap-on force of the balls
- the movement between these two positions is controlled by the combined action of the magnetic parts 31 and 45 which exert a functional torque on the lever 24 of the intensity passing through the contacts 22, 23.
- This torque increases the contact pressure before tripping of the threshold device 37, that is to say as long as this torque does not reach the value required to trigger the threshold device.
- the switch shown in FIG. 7 has, compared to that of FIGS. 1 to 6, inter alia the advantage of having a safer operation and of requiring less precision in mounting its various components.
- the contactor represented in FIG. 7 has a breaking capacity which can reach 100 KVA, with a guarantee of non-welding of the contacts for intensities between 160 and 800 A about.
- these return and / or locking means may be different from those described, the main thing being that they exert on the lever or levers, a force which maintains the contacts in the closed position, as long as the force of attraction exerted by the piece magneti ⁇ that 12 or 31 'does not reach the desired value to obtain the opening of the contacts. It is also essential that these means allow an acceleration of the opening of the contacts from the beginning of this
- control member 1 constituted by the electromagnet 6, 29 can be replaced by a mechanical cocking device which causes the contacts to be closed manually, and which can be opened either by manual to perform normal opening, either by internal or external triggering means to confirm automatic opening.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanisms For Operating Contacts (AREA)
- Breakers (AREA)
Abstract
L'interrupteur comprend un contact fixe (2) et un contact mobile (3) soumis à l'action d'une pièce magnétique (12). Le contact mobile (3) est porté par un levier (4) pivotant autour d'un axe (10) solidaire d'un organe de comande (6). L'extrémité (4a) de ce levier comporte un second axe (15) qui est relié à un dispositif à seuil mécanique (18), ce second axe pouvant se déplacer entre une position normale maintenue par le dispositif à seuil dans laquelle les contacts (2, 3) peuvent être fermés et ouverts par l'organe de commande, et une position de déclenchement par rapport au dispositif à seuil dans laquelle le levier est placé dans une position ou les contacts sont toujours séparés. La pièce magnétique (12) occupe par rapport au levier pivotant (4) une position telle qu'elle exerce sur ce dernier un couple qui renforce la pression de contact avant déclenchement du dispositif à seuil et qui fait pivoter le levier autour de son axe (10) dans le sens de l'ouverture des contacts après déclenchement de ce dispositif (18). Utilisation pour la protection des installations électriques contre les surchages de courant.The switch comprises a fixed contact (2) and a movable contact (3) subjected to the action of a magnetic part (12). The movable contact (3) is carried by a lever (4) pivoting about an axis (10) integral with a control member (6). The end (4a) of this lever comprises a second axis (15) which is connected to a mechanical threshold device (18), this second axis being able to move between a normal position maintained by the threshold device in which the contacts ( 2, 3) can be closed and opened by the control member, and a trigger position relative to the threshold device in which the lever is placed in a position where the contacts are always separated. The magnetic part (12) occupies with respect to the pivoting lever (4) a position such that it exerts on the latter a torque which reinforces the contact pressure before triggering of the threshold device and which causes the lever to pivot around its axis ( 10) in the direction of the opening of the contacts after tripping of this device (18). Use for the protection of electrical installations against current overloads.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8300086A FR2538947A1 (en) | 1983-01-05 | 1983-01-05 | CLOSED AND OPEN SWITCH CONTROLLED AND AUTOMATICALLY OPEN IN CASE OF CURRENT OVERLOAD |
FR8300086 | 1983-01-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0130208A1 true EP0130208A1 (en) | 1985-01-09 |
EP0130208B1 EP0130208B1 (en) | 1986-08-20 |
Family
ID=9284684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84900390A Expired EP0130208B1 (en) | 1983-01-05 | 1984-01-04 | Switch with controlled closing and opening and automatic opening in case of current overloads |
Country Status (7)
Country | Link |
---|---|
US (1) | US4571565A (en) |
EP (1) | EP0130208B1 (en) |
JP (1) | JPS60500313A (en) |
DE (2) | DE130208T1 (en) |
FR (1) | FR2538947A1 (en) |
IT (1) | IT1178054B (en) |
WO (1) | WO1984002802A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2212173A (en) * | 1987-11-11 | 1989-07-19 | Sumitomo Chemical Co | Heated reactor for vapor-phase growth of films |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4656444A (en) * | 1985-08-16 | 1987-04-07 | Westinghouse Electric Corp. | Circuit breaker with force generating shunt |
US4951021A (en) * | 1988-10-28 | 1990-08-21 | Eaton Corporation | Electromagnetic switching apparatus having dynamically balanced latch trip |
JP2826772B2 (en) * | 1991-01-07 | 1998-11-18 | キヤノン株式会社 | Liquid crystal display |
DE4333278A1 (en) * | 1993-09-24 | 1995-03-30 | Siemens Ag | Circuit breaker with an arc extinguisher |
US5847629A (en) * | 1997-04-03 | 1998-12-08 | Eaton Corporation | Circuit breaker contact spring subassembly and method and apparatus for making and circuit breaker incorporating same |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2944129A (en) * | 1957-11-12 | 1960-07-05 | Fed Pacific Electric Co | Circuit breakers |
DE1169014B (en) * | 1961-12-21 | 1964-04-30 | Licentia Gmbh | Current-limiting low-voltage circuit breaker |
NL158644B (en) * | 1969-03-25 | 1978-11-15 | Hazemeijer Bv | ELECTRIC SWITCH WITH ELECTRODYNAMIC INCREASE IN CONTACT PRESSURE AND SWITCH-OFF SPEED. |
JPS5422109B2 (en) * | 1973-07-19 | 1979-08-04 | ||
IT1038809B (en) * | 1974-06-21 | 1979-11-30 | Siemens Ag | ELECTRIC MANEUVERING DEVICE |
DE2552176A1 (en) * | 1975-11-21 | 1977-06-02 | Hoechst Ag | NEW PIPERIDIN DERIVATIVES, THEIR PRODUCTION AND USE |
JPS5350847A (en) * | 1976-10-20 | 1978-05-09 | Fujitsu Ltd | Optical branching circuit |
FR2483683A1 (en) * | 1980-05-30 | 1981-12-04 | Telemecanique Electrique | CONTACTOR HAVING CIRCUIT BREAKER PROPERTIES |
JPS58131636A (en) * | 1982-01-29 | 1983-08-05 | 松下電工株式会社 | Remote control type circuit breaker |
-
1983
- 1983-01-05 FR FR8300086A patent/FR2538947A1/en active Granted
-
1984
- 1984-01-04 EP EP84900390A patent/EP0130208B1/en not_active Expired
- 1984-01-04 JP JP59500373A patent/JPS60500313A/en active Granted
- 1984-01-04 IT IT47507/84A patent/IT1178054B/en active
- 1984-01-04 WO PCT/FR1984/000003 patent/WO1984002802A1/en active IP Right Grant
- 1984-01-04 DE DE198484900390T patent/DE130208T1/en active Pending
- 1984-01-04 DE DE8484900390T patent/DE3460480D1/en not_active Expired
- 1984-01-04 US US06/639,417 patent/US4571565A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO8402802A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2212173A (en) * | 1987-11-11 | 1989-07-19 | Sumitomo Chemical Co | Heated reactor for vapor-phase growth of films |
GB2212173B (en) * | 1987-11-11 | 1991-10-16 | Sumitomo Chemical Co | Heated reactor fo vapor-phase growth of films |
Also Published As
Publication number | Publication date |
---|---|
WO1984002802A1 (en) | 1984-07-19 |
JPH0253903B2 (en) | 1990-11-20 |
DE3460480D1 (en) | 1986-09-25 |
DE130208T1 (en) | 1985-05-09 |
FR2538947A1 (en) | 1984-07-06 |
IT8447507A0 (en) | 1984-01-04 |
IT1178054B (en) | 1987-09-09 |
JPS60500313A (en) | 1985-03-07 |
EP0130208B1 (en) | 1986-08-20 |
FR2538947B1 (en) | 1985-04-19 |
US4571565A (en) | 1986-02-18 |
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