EP1168391A1 - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- EP1168391A1 EP1168391A1 EP00900171A EP00900171A EP1168391A1 EP 1168391 A1 EP1168391 A1 EP 1168391A1 EP 00900171 A EP00900171 A EP 00900171A EP 00900171 A EP00900171 A EP 00900171A EP 1168391 A1 EP1168391 A1 EP 1168391A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- movable
- pin
- contact arm
- movable members
- end surface
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
- H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
- H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
-
- 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
- H01H2071/0292—Housing or frames containing grooves or slots for guiding movable 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
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- 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
- H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal 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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/504—Manual reset mechanisms which may be also used for manual release provided with anti-rebound means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
Definitions
- This invention relates to a circuit interrupter including a plurality of movable members parallel-disposed on a single pole and a flexible conductor connected to each of the movable members.
- Fig. 5 is a schematical illustration showing a conventional circuit interrupter disclosed in Japanese Patent Laid-Open No. 4-118825 for example.
- Fig. 6 is a sectional view showing a contact member portion of the circuit interrupter shown in Fig. 5.
- Fig. 7 is an enlarged sectional view of the main portion taken along line VII - VII of Fig. 6 for illustrating the contact member portion of the circuit interrupter in a closed position.
- Fig. 8 is a sectional view, similar to Fig. 7, of the contact member portion of the circuit interrupter in an open position.
- 1 is a housing made of a synthetic resin material
- 2 are a plurality of stationary conductors disposed in parallel within the housing 1
- 3 are stationary contacts secured to the stationary conductors 2.
- 4 are movable contacts separating and contacting relative to the stationary contacts 2 in opposition thereto
- 5 are plurality of parallel-disposed (shown in Fig. 7) movable members to which the movable contacts 4 are attached.
- 6 is a contact arm for rotatably supporting and holding the movable members 5 by a movable member pin
- 8 is a contact arm pin for rotatably supporting the contact arm 6 from the housing 1.
- 9 is a conductor constituting a terminal
- 10 is a flexible conductor for connecting the movable member 5 and the conductor 9
- 11 is a contact spring
- 12 is an operating mechanism portion connected to the contact arm 6 by a pin 13 for operating the movable contacts 4
- 14 is a trip relay portion
- 15 is an arc extinguishing device.
- the above instantaneous interruption is to be achieved after the prescribed guarantied time interval (maximum holding time of 0.5 seconds). Therefore, within the prescribed short-time period, even when a fault current flows, the circuit interrupter must maintain the closed position and both the contacts 3 and 4 should not melt or weld to each other by the fault current.
- This invention has been made in order to solve the above-discussed problems and has as its object the provision of a circuit interrupter capable of achieving smooth opening and closing operation without the lateral movement of the contacts even when the short-time overcurrent flows through the circuit interrupter.
- the circuit interrupter of the present invention comprises a housing, a plurality of stationary contacts disposed within the housing, a plurality of movable members each having a movable contact separable from the stationary contact and a contact arm rotatably supporting the movable members by a movable member pin, and is characterized in that the housing having a side wall including a sloped surface facing to a end surface of the movable member pin, the arrangement being such that a predetermined gap is defined between the end surface of the movable member pin and the side wall of the housing when the movable members are in the open position, and that a small gap is defined between the end surface of the movable member pin and the side wall when the movable members are in the closed position.
- the side wall of the housing opposing to the end surface of the movable member pin may be provided with a friction reducing member.
- the end surface of the movable member pin may be a sphere-shaped.
- the contact arm may be rotatably supported by a contact arm pin, and a tubular bush may be provided between the contact arm and the contact arm pin for reducing a play therebetween and preventing the movable members from laterally moving.
- the circuit interrupter of the present invention may comprise a housing, a plurality of stationary contacts disposed within the housing, a plurality of movable members each having a movable contact separable from the stationary contact, a contact arm rotatably supporting the movable members, and a contact arm pin for rotatably supporting the contact arm, and a tubular bush may be provided on the contact arm pin for preventing lateral movement.
- FIGs. 1 and 2 enlarged sectional views of the main portion of the circuit interrupter of the first embodiment of the present invention, Fig. 1 showing the open position and Fig. 2 showing the closed position.
- the reference numerals 1 to 7 depicts the same components as those of the conventional device as above described, so that their explanations are omitted.
- the housing 1a are side walls of the housing 1 and has formed therein a tapered surface having a slope for pulling out the mold from the mold die so as to have a dimension L1 on the side of the stationary conductor 2 and a dimension L2 on the side of the movable members 5.
- These sloped surface is tapered so that a predetermined gap G1 is defined between the movable member pin end surface 7a and the side wall 1a of the housing 1 when the movable members 5 are in the open position as shown in Fig. 1 and that a gap G2 is defined between the movable member pin end surface 7a and the side wall 1a of the housing 1 when the movable members 5 are in the closed position as shown in Fig. 2.
- the gap G1 is equal to or more than 2 mm and gap G2 is 0.05 - 0.5 mm for an air circuit interrupter of from 630 A frame to 6300 A frame, for example.
- a friction reducing member or a sliding piece which is made for example of a phosphor bronze plate, a stainless steel plate, a wear-resisting treated carbon steel plate or the like, attached by bonding, inlaying or the like to the side walls 1a at the portions opposing to the end surfaces 7a of the movable pin 7 when the movable pin 7 is rotated during the opening and closing movement of the movable members 5.
- end surfaces 7a of the movable member pin 7 are formed into sphere-shaped in order to minimize the frictional force with respect to the sliding piece 16.
- the housing 1 has the side walls 1a each including a sloped surface facing to the end surface 7a of the movable member pin 7, the sloped surface being such that the predetermined gap G1 is defined between the end surface 7a of the movable member pin 7 and the side wall 1a of the housing 1 when the movable members 5 are in the open position, and that the small gap G2 is defined between the end surface 7a of the movable member pin 7 and the side wall 1a of the housing 1 when the movable members 5 are in the closed position, so that, when an excessive current such as a fault current flows through the electrical path in the closed state, the movable members are prevented from moving in the lateral directions, making the contacting relationship stable and no arc is generated across the movable contacts 4 and the stationary contact 3 before the short time interruption operation by the circuit interrupter.
- the spherical end surfaces 7a disposed at the opposite ends of the movable member pin 7 are moved into the closing direction while maintaining the contact with the sliding pieces 16, the operation being smooth because the contact frictional force are small.
- the gaps G2 between the end surfaces 7a of the movable member pin 7 and the sliding pieces 16 are very small but allowing the movable members 5 to move, so that even when the electromagnetic forces between the different pole units due to the short time current interact therebetween, the movable members 5 and the movable contacts 4 are allowed to move only by this small gap, eliminating the arcing between the contacts and improving the short time current carrying performance.
- Figs. 3 and 4 show the movable contact member portion of the circuit interrupter of another embodiment of the present invention, Fig. 3 being a plan view and Fig. 4 is a front view.
- the reference numerals 4 - 13 depict similar components to those of the conventional device, so that their explanation will be omitted.
- 17 is a tubular bushing disposed on a contact arm pin 8 which is a rotational center of the rotatable movable members 5 and the flexible conductors 10.
- the bush 17 is in intimate contact at its inner circumferential surface with the contact arm pin 8 and its opposite end surfaces are in abutment with the side plates 6a of the contact arm 6.
- the bush 17 is brought into contact with substantially no play therebetween with the contact arm 6 and a shunt holders 18 which holds and positions the entire movable member portion within the housing 1, so that the movable members 5 and the flexible conductors 10 are allowed to freely rotate about the contact arm pin 8 without any resistance but not allowed to make any transnational or rotational movement in the axial direction of the contact arm pin 8 as shown by an arrow Y. Therefore the lateral movements of the movable members 5 and the movable contacts 4 are suppressed.
- this embodiment illustrated in Figs. 3 and 4 in which the bush is disposed between the contact arm pin 8 and the contact arm 6 and the embodiment illustrated in Figs. 1 and 2 in which the gap defined between the side walls of the housing 1 and the movable member pin 7 is made small may be used together in combination or independently.
- the housing having a side wall including a sloped surface facing to a end surface of the movable member pin, the arrangement being such that a predetermined gap is defined between the end surface of the movable member pin and the side wall of the housing when the movable members are in the open position, and that a small gap is defined between the end surface of the movable member pin and the side wall when the movable members are in the closed position.
- the movable members are prevented from moving in the lateral directions, making the contacting relationship stable and no arc is generated across the contacts before the short time interruption operation by the circuit interrupter. Also, the operation can be smooth because the contact frictional force is small. Also, even when the electromagnetic forces between the different pole units due to the short time current interact therebetween, the movable members and the movable contacts are allowed to move only by the small gap, eliminating the arcing between the contacts and improving the short time current carrying performance.
- the side wall of the housing opposing to the end surface of the movable member pin is provided with a friction reducing member or the end surface of the movable member pin is a sphere-shaped, so that the opening and closing movement of the movable members is not influenced.
- a tubular bush is provided between the contact arm and the contact arm pin for reducing a play therebetween and preventing the movable members from laterally moving, so that the lateral movement of the movable members due to the mutually acting electromagnetic forces between the poles can be prevented, eliminating the arcing between the contacts and improving the short time current carrying performance.
- the circuit interrupter of the present invention in which the contacting relationship is stable and no arc is generated across the contacts before the short time interruption operation by the circuit interrupter, the operation is smooth, the short time current carrying performance is improved and in which the opening and closing operation durability is improved, can be used as the circuit interrupter for power distribution.
Landscapes
- Breakers (AREA)
Abstract
Description
- This invention relates to a circuit interrupter including a plurality of movable members parallel-disposed on a single pole and a flexible conductor connected to each of the movable members.
- Fig. 5 is a schematical illustration showing a conventional circuit interrupter disclosed in Japanese Patent Laid-Open No. 4-118825 for example. Fig. 6 is a sectional view showing a contact member portion of the circuit interrupter shown in Fig. 5. Fig. 7 is an enlarged sectional view of the main portion taken along line VII - VII of Fig. 6 for illustrating the contact member portion of the circuit interrupter in a closed position. Fig. 8 is a sectional view, similar to Fig. 7, of the contact member portion of the circuit interrupter in an open position.
- In these figures, 1 is a housing made of a synthetic resin material, 2 are a plurality of stationary conductors disposed in parallel within the
housing stationary conductors 2. 4 are movable contacts separating and contacting relative to thestationary contacts 2 in opposition thereto, and 5 are plurality of parallel-disposed (shown in Fig. 7) movable members to which themovable contacts 4 are attached. 6 is a contact arm for rotatably supporting and holding themovable members 5 by amovable member pin contact arm 6 from thehousing 1. 9 is a conductor constituting a terminal, 10 is a flexible conductor for connecting themovable member 5 and theconductor contact arm 6 by apin 13 for operating themovable contacts - When an excessive current such as a fault current flows through an electric path of the conventional circuit interrupter and when it is desired that the circuit interrupter achieves an instantaneous interrupting operation, wherein the
operating mechanism portion 12 operates to cause thecontact 6 to rotate about thecontact arm pin 8 to rotate themovable members 5 around themovable member pin 7, thereby separating themovable contacts 4 from thestationary contact 3. The electric arc generated at that time is extinguished by thearc extinguishing device 15. - Also, when an excessive current such as a fault current flow through the electric path and when a short time interruption is desired rather than the instantaneous interruption for maintaining the selective co-ordination, the above instantaneous interruption is to be achieved after the prescribed guarantied time interval (maximum holding time of 0.5 seconds). Therefore, within the prescribed short-time period, even when a fault current flows, the circuit interrupter must maintain the closed position and both the
contacts - In the conventional circuit interrupter as above described, since a predetermined gap G1 is defined between the
side wall 1a of thehousing 1 and theend surfaces 7a of themovable member pin 7 holding the parallel-disposedmovable members 5 when the circuit interrupter is in the closed position, themovable members 5 and themovable member pin 7 are moved in the lateral direction as viewed in Fig. 7 by an amount corresponding to the above gap G1 before they initiate the short-time interruption movement from the closed position by a mutual electromagnetic force between the three phase currents flowing through the different pole units. This causes themovable contacts 4 attached to themovable members 5 to move laterally while maintaining the contact states with thestatinary contact 3. Therefore, the contacts between them are unstable and arcs can be generated across themovable contacts 4 and thestationary contact 3 before the circuit interrupter initiates the short-time interruption. - This invention has been made in order to solve the above-discussed problems and has as its object the provision of a circuit interrupter capable of achieving smooth opening and closing operation without the lateral movement of the contacts even when the short-time overcurrent flows through the circuit interrupter.
- The circuit interrupter of the present invention comprises a housing, a plurality of stationary contacts disposed within the housing, a plurality of movable members each having a movable contact separable from the stationary contact and a contact arm rotatably supporting the movable members by a movable member pin, and is characterized in that the housing having a side wall including a sloped surface facing to a end surface of the movable member pin, the arrangement being such that a predetermined gap is defined between the end surface of the movable member pin and the side wall of the housing when the movable members are in the open position, and that a small gap is defined between the end surface of the movable member pin and the side wall when the movable members are in the closed position.
- Also, the side wall of the housing opposing to the end surface of the movable member pin may be provided with a friction reducing member.
- Also, the end surface of the movable member pin may be a sphere-shaped.
- Also, the contact arm may be rotatably supported by a contact arm pin, and a tubular bush may be provided between the contact arm and the contact arm pin for reducing a play therebetween and preventing the movable members from laterally moving.
- Further, the circuit interrupter of the present invention may comprise a housing, a plurality of stationary contacts disposed within the housing, a plurality of movable members each having a movable contact separable from the stationary contact, a contact arm rotatably supporting the movable members, and a contact arm pin for rotatably supporting the contact arm, and a tubular bush may be provided on the contact arm pin for preventing lateral movement.
-
- Fig. 1 is a sectional view showing the contact member portions in the open position of the circuit interrupter of the first embodiment of the present invention;
- Fig. 2 is a sectional view showing the contact member portions in the closed position of the circuit interrupter shown in Fig. 1
- Fig. 3 is a plan view showing the movable contact member of the circuit interrupter of the second embodiment of the present invnetion;
- Fig. 4 is a front view showing the movable contact member of the circuit interrupter of the second embodiment of the present invention;
- Fig. 5 is a schematic view showing a conventional circuit interrupter;
- Fig. 6 is a sectional view showing the contact member portion of the conventional circuit interrupter;
- Fig. 7 is an enlarged sectional view of the main portion and taken along line VII - VII of Fig. 6 with the contact member portion in the closed position; and
- Fig. 8 is a sectional view showing the contact member portion in the open position similar to Fig. 7.
- Figs. 1 and 2 enlarged sectional views of the main portion of the circuit interrupter of the first embodiment of the present invention, Fig. 1 showing the open position and Fig. 2 showing the closed position. In these figures, the
reference numerals 1 to 7 depicts the same components as those of the conventional device as above described, so that their explanations are omitted. - 1a are side walls of the
housing 1 and has formed therein a tapered surface having a slope for pulling out the mold from the mold die so as to have a dimension L1 on the side of thestationary conductor 2 and a dimension L2 on the side of themovable members 5. These sloped surface is tapered so that a predetermined gap G1 is defined between the movable memberpin end surface 7a and theside wall 1a of thehousing 1 when themovable members 5 are in the open position as shown in Fig. 1 and that a gap G2 is defined between the movable memberpin end surface 7a and theside wall 1a of thehousing 1 when themovable members 5 are in the closed position as shown in Fig. 2. It is preferable that the gap G1 is equal to or more than 2 mm and gap G2 is 0.05 - 0.5 mm for an air circuit interrupter of from 630 A frame to 6300 A frame, for example. - 16 is a friction reducing member or a sliding piece, which is made for example of a phosphor bronze plate, a stainless steel plate, a wear-resisting treated carbon steel plate or the like, attached by bonding, inlaying or the like to the
side walls 1a at the portions opposing to theend surfaces 7a of themovable pin 7 when themovable pin 7 is rotated during the opening and closing movement of themovable members 5. - Also, the
end surfaces 7a of themovable member pin 7 are formed into sphere-shaped in order to minimize the frictional force with respect to thesliding piece 16. - In the circuit interrupter arranged as above described, the
housing 1 has theside walls 1a each including a sloped surface facing to theend surface 7a of themovable member pin 7, the sloped surface being such that the predetermined gap G1 is defined between theend surface 7a of themovable member pin 7 and theside wall 1a of thehousing 1 when themovable members 5 are in the open position, and that the small gap G2 is defined between theend surface 7a of themovable member pin 7 and theside wall 1a of thehousing 1 when themovable members 5 are in the closed position, so that, when an excessive current such as a fault current flows through the electrical path in the closed state, the movable members are prevented from moving in the lateral directions, making the contacting relationship stable and no arc is generated across themovable contacts 4 and thestationary contact 3 before the short time interruption operation by the circuit interrupter. - Also, when the
movable members 5 and themovable member pin 7 are brought into the closed state by the opening and closing operation, thespherical end surfaces 7a disposed at the opposite ends of themovable member pin 7 are moved into the closing direction while maintaining the contact with thesliding pieces 16, the operation being smooth because the contact frictional force are small. When themovable members 5 are in the closed position, the gaps G2 between theend surfaces 7a of themovable member pin 7 and thesliding pieces 16 are very small but allowing themovable members 5 to move, so that even when the electromagnetic forces between the different pole units due to the short time current interact therebetween, themovable members 5 and themovable contacts 4 are allowed to move only by this small gap, eliminating the arcing between the contacts and improving the short time current carrying performance. - Also, in recent years where a continuous power supply with the above arrangement is required, the improvements in the short time current carrying capacity which is indispensable to the selective interruption performance can be expected.
- Also, since the lateral movements of the
movable contacts 4 due to the mutually acting electromagnetic forces between the different poles can be prevented, only a required minimum contact pressure for overcoming the electromagnetic repulsive force between the contacts is needed and there is no need to rely on the prevention of the lateral movement by increasing the contact pressure. This means for theoperating mechanism portion 12 that the contact pressure which is the largest load during the closing operating can be reduced, improving the operating durability. - Figs. 3 and 4 show the movable contact member portion of the circuit interrupter of another embodiment of the present invention, Fig. 3 being a plan view and Fig. 4 is a front view. In the figures, the reference numerals 4 - 13 depict similar components to those of the conventional device, so that their explanation will be omitted. 17 is a tubular bushing disposed on a
contact arm pin 8 which is a rotational center of the rotatablemovable members 5 and theflexible conductors 10. Thebush 17 is in intimate contact at its inner circumferential surface with thecontact arm pin 8 and its opposite end surfaces are in abutment with theside plates 6a of thecontact arm 6. Thus, thebush 17 is brought into contact with substantially no play therebetween with thecontact arm 6 and ashunt holders 18 which holds and positions the entire movable member portion within thehousing 1, so that themovable members 5 and theflexible conductors 10 are allowed to freely rotate about thecontact arm pin 8 without any resistance but not allowed to make any transnational or rotational movement in the axial direction of thecontact arm pin 8 as shown by an arrow Y. Therefore the lateral movements of themovable members 5 and themovable contacts 4 are suppressed. - That is, in this embodiment, as different from the first embodiment shown in Figs. 1 and 2, by preventing the lateral movement of the
contact arm pin 8 which is the rotational center of themovable members 5 and theflexible conductors 10, the lateral movement of themovable members 5 and themovable contacts 4 due to the mutually acting electromagnetic forces between the poles can be prevented as in the first embodiment, eliminating the arcing between the contacts and improving the short time current carrying performance. - Also, this embodiment illustrated in Figs. 3 and 4 in which the bush is disposed between the
contact arm pin 8 and thecontact arm 6 and the embodiment illustrated in Figs. 1 and 2 in which the gap defined between the side walls of thehousing 1 and themovable member pin 7 is made small may be used together in combination or independently. - As has been described, according to the circuit interrupter of the present invention, the housing having a side wall including a sloped surface facing to a end surface of the movable member pin, the arrangement being such that a predetermined gap is defined between the end surface of the movable member pin and the side wall of the housing when the movable members are in the open position, and that a small gap is defined between the end surface of the movable member pin and the side wall when the movable members are in the closed position.
- Therefore, even when an excessive current such as a fault current flows, the movable members are prevented from moving in the lateral directions, making the contacting relationship stable and no arc is generated across the contacts before the short time interruption operation by the circuit interrupter. Also, the operation can be smooth because the contact frictional force is small. Also, even when the electromagnetic forces between the different pole units due to the short time current interact therebetween, the movable members and the movable contacts are allowed to move only by the small gap, eliminating the arcing between the contacts and improving the short time current carrying performance.
- Also, the side wall of the housing opposing to the end surface of the movable member pin is provided with a friction reducing member or the end surface of the movable member pin is a sphere-shaped, so that the opening and closing movement of the movable members is not influenced.
- Further, a tubular bush is provided between the contact arm and the contact arm pin for reducing a play therebetween and preventing the movable members from laterally moving, so that the lateral movement of the movable members due to the mutually acting electromagnetic forces between the poles can be prevented, eliminating the arcing between the contacts and improving the short time current carrying performance.
- The circuit interrupter of the present invention, in which the contacting relationship is stable and no arc is generated across the contacts before the short time interruption operation by the circuit interrupter, the operation is smooth, the short time current carrying performance is improved and in which the opening and closing operation durability is improved, can be used as the circuit interrupter for power distribution.
Claims (5)
- A circuit interrupter comprising a housing, a plurality of stationary contacts disposed within said housing, a plurality of movable members each having a movable contact separable from said stationary contact and a contact arm rotatably supporting said movable members by a movable member pin, characterized in that said housing having a side wall including a sloped surface facing to a end surface of said movable member pin, the arrangement being such that a predetermined gap is defined between said end surface of said movable member pin and said side wall of said housing when said movable members are in the open position, and that a small gap is defined between said end surface of said movable member pin and said side wall when said movable members are in the closed position.
- A circuit interrupter as claimed in claim 1, wherein said side wall of said housing opposing to said end surface of said movable member pin is provided with a friction reducing member.
- A circuit interrupter as claimed in claim 1 or 2, wherein said end surface of said movable member pin is a sphere-shaped.
- A circuit interrupter as claimed in any one of claims 1 to 3, wherein said contact arm is rotatably supported by a contact arm pin, and wherein a tubular bush is provided between said contact arm and said contact arm pin for reducing a play therebetween and preventing said movable members from laterally moving.
- A circuit interrupter comprising a housing, a plurality of stationary contacts disposed within said housing, a plurality of movable members each having a movable contact separable from said stationary contact, a contact arm rotatably supporting said movable members, and a contact arm pin for rotatably supporting said contact arm, characterized in that a tubular bush is provided on said contact arm pin for preventing lateral movement.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2000/000076 WO2001052289A1 (en) | 2000-01-11 | 2000-01-11 | Circuit breaker |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1168391A1 true EP1168391A1 (en) | 2002-01-02 |
EP1168391A4 EP1168391A4 (en) | 2003-08-13 |
EP1168391B1 EP1168391B1 (en) | 2005-11-30 |
Family
ID=11735563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00900171A Expired - Lifetime EP1168391B1 (en) | 2000-01-11 | 2000-01-11 | Circuit breaker |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1168391B1 (en) |
JP (1) | JP4329922B2 (en) |
KR (1) | KR100447439B1 (en) |
CN (1) | CN1189904C (en) |
DE (1) | DE60024426T2 (en) |
ES (1) | ES2249243T3 (en) |
TW (1) | TW512380B (en) |
WO (1) | WO2001052289A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4395134B2 (en) * | 2004-01-28 | 2010-01-06 | 三菱電機株式会社 | Breaker |
KR100835017B1 (en) | 2006-07-27 | 2008-06-03 | 미쓰비시덴키 가부시키가이샤 | Breaker |
JP2009134995A (en) * | 2007-11-30 | 2009-06-18 | Mitsubishi Electric Corp | Air circuit breaker |
KR200469351Y1 (en) * | 2009-09-11 | 2013-10-07 | 현대중공업 주식회사 | structure of guide ring and groove |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04118825A (en) * | 1990-09-07 | 1992-04-20 | Mitsubishi Electric Corp | Braker |
US5146194A (en) * | 1988-10-12 | 1992-09-08 | Westinghouse Electric Corp. | Screw adjustable clinch joint with bosses |
US5898146A (en) * | 1997-09-18 | 1999-04-27 | Eaton Corporation | Molded case circuit breaker with modular crossbar |
JPH11306950A (en) * | 1998-04-21 | 1999-11-05 | Mitsubishi Electric Corp | Circuit breaker |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2965332B2 (en) * | 1990-07-10 | 1999-10-18 | テンパール工業株式会社 | Circuit breaker |
US5093544A (en) * | 1991-01-18 | 1992-03-03 | General Electric Company | Molded case circuit breaker movable contact arm mounting arrangement |
-
2000
- 2000-01-11 EP EP00900171A patent/EP1168391B1/en not_active Expired - Lifetime
- 2000-01-11 JP JP2001552417A patent/JP4329922B2/en not_active Expired - Fee Related
- 2000-01-11 TW TW089100297A patent/TW512380B/en not_active IP Right Cessation
- 2000-01-11 ES ES00900171T patent/ES2249243T3/en not_active Expired - Lifetime
- 2000-01-11 KR KR10-2001-7011377A patent/KR100447439B1/en active IP Right Grant
- 2000-01-11 WO PCT/JP2000/000076 patent/WO2001052289A1/en active IP Right Grant
- 2000-01-11 DE DE60024426T patent/DE60024426T2/en not_active Expired - Lifetime
- 2000-01-11 CN CNB008045852A patent/CN1189904C/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5146194A (en) * | 1988-10-12 | 1992-09-08 | Westinghouse Electric Corp. | Screw adjustable clinch joint with bosses |
JPH04118825A (en) * | 1990-09-07 | 1992-04-20 | Mitsubishi Electric Corp | Braker |
US5898146A (en) * | 1997-09-18 | 1999-04-27 | Eaton Corporation | Molded case circuit breaker with modular crossbar |
JPH11306950A (en) * | 1998-04-21 | 1999-11-05 | Mitsubishi Electric Corp | Circuit breaker |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 016, no. 372 (E-1246), 11 August 1992 (1992-08-11) -& JP 04 118825 A (MITSUBISHI ELECTRIC CORP), 20 April 1992 (1992-04-20) * |
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02, 29 February 2000 (2000-02-29) -& JP 11 306950 A (MITSUBISHI ELECTRIC CORP), 5 November 1999 (1999-11-05) * |
See also references of WO0152289A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE60024426T2 (en) | 2006-08-10 |
CN1342324A (en) | 2002-03-27 |
KR100447439B1 (en) | 2004-09-04 |
KR20010108328A (en) | 2001-12-07 |
WO2001052289A1 (en) | 2001-07-19 |
ES2249243T3 (en) | 2006-04-01 |
DE60024426D1 (en) | 2006-01-05 |
TW512380B (en) | 2002-12-01 |
EP1168391A4 (en) | 2003-08-13 |
EP1168391B1 (en) | 2005-11-30 |
JP4329922B2 (en) | 2009-09-09 |
CN1189904C (en) | 2005-02-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4649247A (en) | Contact assembly for low-voltage circuit breakers with a two-arm contact lever | |
CA2053516C (en) | Low voltage circuit breaker with multiple contacts for high currents | |
US7723634B2 (en) | Contactor assembly with arc steering system | |
US4467301A (en) | Electric switch having enhanced fault current capability | |
CA2446958C (en) | Electrical switching apparatus having an arc runner with an elongated raised ridge | |
AU598234B2 (en) | Reverse loop circuit breaker with stationary conductor | |
US9281138B2 (en) | Parallel type transfer switch contacts assemblies | |
US4594489A (en) | Electrical switching element | |
EP3899998B1 (en) | Switching device for guiding and switching of load currents | |
EP0210727B1 (en) | High current double-break electrical contactor | |
EP1168391B1 (en) | Circuit breaker | |
EP0100367A1 (en) | Circuit breaker | |
JP3967387B2 (en) | Arc switching switch | |
US7202427B2 (en) | Switch contact arrangement comprising a device for increasing a contact-force acting between switch contacts | |
US4598187A (en) | Current limiting circuit breaker | |
KR100496596B1 (en) | Air Circuit Breaker | |
JP4090948B2 (en) | Circuit breaker | |
KR102353017B1 (en) | Direct Current Circuit Breaker | |
US4162467A (en) | Circuit breaker contact structure | |
JPH0334234A (en) | Circuit breaker | |
JP4090659B2 (en) | Circuit breaker | |
CZ306294A3 (en) | Doubled interrupting gear of current for switching device | |
JPH08306278A (en) | Contact structure for circuit breaker | |
JPH11149855A (en) | Circuit breaker | |
JP3442304B2 (en) | Circuit breaker contact device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
17P | Request for examination filed |
Effective date: 20020627 |
|
R17P | Request for examination filed (corrected) |
Effective date: 20010627 |
|
A4 | Supplementary search report drawn up and despatched |
Effective date: 20030626 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): DE ES FR GB |
|
17Q | First examination report despatched |
Effective date: 20041201 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REF | Corresponds to: |
Ref document number: 60024426 Country of ref document: DE Date of ref document: 20060105 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2249243 Country of ref document: ES Kind code of ref document: T3 |
|
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: MITSUBISHI DENKI KABUSHIKI KAISHA |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 727 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 727A |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20060831 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 727H |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20070126 Year of fee payment: 8 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20080112 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080112 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: 746 Effective date: 20110513 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 60024426 Country of ref document: DE Effective date: 20110705 Ref country code: DE Ref legal event code: R084 Ref document number: 60024426 Country of ref document: DE Effective date: 20110506 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20171211 Year of fee payment: 19 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20171228 Year of fee payment: 19 Ref country code: GB Payment date: 20180110 Year of fee payment: 19 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 60024426 Country of ref document: DE |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20190111 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190801 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190111 |