WO2005073994A1 - 遮断器 - Google Patents
遮断器 Download PDFInfo
- Publication number
- WO2005073994A1 WO2005073994A1 PCT/JP2004/000759 JP2004000759W WO2005073994A1 WO 2005073994 A1 WO2005073994 A1 WO 2005073994A1 JP 2004000759 W JP2004000759 W JP 2004000759W WO 2005073994 A1 WO2005073994 A1 WO 2005073994A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact
- fixed
- movable
- mover
- shaft
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
-
- 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
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
- H01H1/5822—Flexible connections between movable contact and terminal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
Definitions
- the present invention relates to a circuit breaker structure.
- Japanese Unexamined Patent Application Publication No. Hei 6-89650 discloses a current-carrying part including a stator having a fixed contact, a movable element having a movable contact, and a shunt conductor extending between the movable element and a terminal.
- a high-permeability member is disposed on the second member so that the magnetic flux passing through the high-permeability member interlinks with the current.
- the magnetic flux concentrates on the high magnetic permeability member, and the short-circuit current interlinks with the magnetic flux concentrated on the high magnetic permeability member, thereby increasing the amount of interlinkage magnetic flux, increasing the force pressing the contacts, and increasing the current carrying capacity Is improved.
- the present invention has been made in view of the above points, and has an object to increase the number of parts.
- the purpose of the present invention is to improve the short-time current carrying capacity of a circuit breaker when a short-circuit current occurs, by increasing the force pressing between the movable and fixed contacts while maintaining a compact size without requiring any space.
- a circuit breaker includes a stator having a fixed contact, a movable element having a movable contact that is supported by a shaft and tilts to contact and separate from the fixed contact, and the movable element A shunt conductor, one end of which is fixed to the rear end of the shaft in the direction opposite to the movable contact, and the other end of which is connected to a terminal, which is caused by a current flowing through the shunt conductor.
- the electromagnetic force generated by the magnetic flux and the current acts on the mover so that the movable contact is directed to the fixed contact.
- the distance between the shaft and the movable contact is twice or more the horizontal distance, and one end of the shunt conductor is fixed in contact with the rear end of the mover.
- each of the poles includes a stator having a fixed contact, a movable contact that is supported by a shaft and tilts, and has three or more movable contacts having a movable contact that comes in contact with and separates from the fixed contact.
- a shunt conductor having one end fixed to the rear end of the shaft in the direction opposite to the movable contact and having the other end connected to a terminal; and a magnetic flux generated due to a current flowing through the shunt conductor and the current
- the width of the mover on the side adjacent to the other pole as viewed in a plane direction is: The width of other movers is also smaller.
- each of the poles includes a stator having a fixed contact, a movable contact that is supported by a shaft and tilts, and has three or more movable contacts having a movable contact that comes in contact with and separates from the fixed contact.
- a shunt conductor one end of which is fixed to a rear end of the shaft opposite to the movable contact and the other end of which is connected to a terminal;
- a circuit breaker configured such that a magnetic flux generated by a current flowing through the shunt conductor and an electromagnetic force due to the current act on the movable element so as to direct the movable contact toward the fixed contact,
- the movable element on the side adjacent to the movable element is displaced from the fixed contact corresponding to the movable contact of the movable element toward the center of the movable element group.
- FIG. 1 is a side view showing a circuit breaker according to the present invention.
- FIG. 2 is a conceptual diagram showing a stator and a mover portion of the circuit breaker according to Embodiment 1 of the present invention.
- FIG. 3 is an enlarged view of a main part of a stator and a mover part of the circuit breaker according to Embodiment 1 of the present invention.
- FIG. 4 is a graph for explaining the operation of the first embodiment.
- FIG. 5 is a conceptual diagram showing a stator and a mover portion of the circuit breaker according to Embodiment 2 of the present invention.
- FIG. 6 is an enlarged view of a main part of a stator and a mover part of the circuit breaker according to Embodiment 2 of the present invention.
- FIG. 7 is a plan view (a) and a side view (b) showing a stator part of a circuit breaker according to Embodiment 3 of the present invention.
- FIG. 8 is a graph for explaining the operation of the third embodiment.
- FIG. 9 is a plan view (a) and a side view (b) showing a mover portion of a circuit breaker according to Embodiment 4 of the present invention.
- FIG. 1 is a side sectional view of the circuit breaker according to the present invention
- FIG. 2 is a view conceptually showing a stator and a mover part
- FIG. 3 is an enlarged view of a main part of FIG. FIG.
- the circuit breaker according to the present invention includes a box 1.
- a stator (conductor) 3 having a fixed contact point 2, a movable element 5 having a movable contact 4 that comes in contact with and separated from the fixed contact 2, a contact arm 6 supported on a shaft 8, and a movable element 5 in a box 1.
- the movable shaft 7 that supports the terminal 9, the terminal 9, the shunt conductor 10 that electrically connects the terminal 9 and the mover 7, and is bridged between the mover 5 and the case 1, and contacts the mover 5 It has a contact pressure spring 11 that applies a biasing force in the closing direction, an opening / closing mechanism 12, a shaft 13, a trip relay 14, and an arc-extinguishing chamber 15.
- FIG. 2 conceptually shows the stator 3 and the mover 5 in an extracted manner
- FIG. 3 is an enlarged view of a main part of FIG.
- the shunt conductor 10 that connects the terminal 9 and the mover 5 is a flexible conductor in which a number of thin copper plates are stacked.
- One end of the shunt conductor 10 is fixed to the terminal 9 by a screw or the like, and the other end is fixed to the mover 5 at a fixed portion A.
- the fixing portion A usually uses a fixing screw 20 as described later.
- the mover 5 is a substantially rod-shaped member that is tilted about the shaft 7 as a fulcrum.
- the fixed contact 4 is provided at the front end side (the right side in FIG. 2) of the shaft 7 and at the rear end side of the shaft 7 (the left side in FIG. 2). ) Is connected and fixed to the shunt conductor 10.
- the connection between the shunt conductor 10 and the mover 5 and the fixed part will be described in detail.
- the leading end of the shunt conductor 10 made of a laminated conductor abuts along the lower surface on the rear end side of the mover 5, that is, the surface on the side where the movable contact 4 is provided. It is fixed by screwing the screw 20 to the mover 5 by applying the contact 16 from below.
- the tip of the shunt conductor 10 is firmly fixed between the backing plate 16 and the rear end of the armature 5 from the shaft 7 of the armature 5, and electrically close contact with the armature 5. keep.
- the contact metal 16 has a length substantially equal to the length of the tip of the shunt conductor “I 0” in contact with the mover 5.
- a feature of the present invention described in the first embodiment is that, in the above configuration, the distance between the rear end of the mover 5 and the shaft 7 is set to be larger than the distance between the shaft 7 and the movable contact 4. .
- D 1 the horizontal distance between the center of the axis 7 and the movable contact 4
- D 2 the distance between the center of the axis 7 and the rear end of the movable element 5
- a repulsive force caused by an electromagnetic force between the movable contact 4 and the fixed contact 2 (hereinafter, referred to as a contact repulsive force to distinguish it from the electromagnetic repulsive force acting between the terminal 9 and the shunt conductor 10). Acts to apply a force that weakens the pressure contact between the movable contact 4 and the fixed contact 2.
- D2 by setting D2 to be at least twice as large as D1, the moment around D7 by D2 greatly exceeds the moment around D7 by D1.
- the contact pressure greatly exceeds the contact repulsion force, and the short-time conduction capacity is improved.
- Figure 4 (a) shows a typical example of the two-phase current waveforms of phase A and phase B of a three-phase circuit breaker when a short-circuit current occurs.
- Figure 4 shows the time on the horizontal axis and the current value on the vertical axis. The first half wavelength of the short-circuit current is shown, where the current is S and the current of the B pole is T.
- the floating force R (due to the contact repulsion force) and the holding force ⁇ (due to the electromagnetic repulsion force and the contact pressure spring force, etc.) of the mover generated at the contact point are calculated from the electromagnetic force analysis by the finite element method, Figure 4 (b) and (c) (time is plotted on the horizontal axis and force is plotted on the vertical axis).
- D 2 does not reach twice D 1
- the buoyancy force and the holding force are balanced. In some cases, performance could not be satisfied.
- D2 of the size of the mover 5 was twice as large as D1
- a fixed part A for fixing the end of the shunt conductor 10 pressed along the rear end side of the movable element 5 to the movable element 5 is provided at the rear end of the movable element 5. It is characterized by being installed nearby.
- the fixing part A has the same structure as that of the first embodiment. Normally, the end of the shunt conductor 10 which is in contact with the rear end of the mover 5 is sandwiched by a metal plate 16 and a fixing screw 20 Is fixed to the mover 5 by screwing. In this case, when the horizontal distance between the shaft and the movable contact 4 is D1, and the distance between the shaft 7 and the fixing screw 20 is D3, D3 is at least 1.3 times D1. .
- Other configurations are the same as those of the first embodiment.
- the shunt conductor 10 are fixed with the fixing screw 20 When the position is close to the axis 7 and D 3 is less than 1.2 of D 1, the resultant force of the electromagnetic repulsion acting on the mover 5 is a play or transmission time delay caused by the elasticity of the shunt conductor 10, etc. May be reduced.
- the end of the shunt conductor 10 is made to extend along the rear end of the mover 5, and the fixing screw 20 is used to set D3 near the rear end of the stator 5, If it is fixed at a position 1.3 times or more than 1, the play width between the shunt conductor 10 and the stator 5 is suppressed, and the force acting on the movable contact 4 toward the fixed contact 2 is The result was that there was no time delay or play width and the short-time current capacity was improved.
- FIG. 7 is a plan view (a) and a side view (b) showing a mover group of the circuit breaker according to Embodiment 3 of the present invention.
- the example shown in FIG. The number of movers increases and decreases depending on the capacity of the circuit breaker, etc., and is not limited to six.
- Each of the movers 51 to 56 is supported on the shaft 7 and is fixed to the shunt conductor 10 with fixing screws 20.
- Each of the movers 51 to 56 is provided with a movable contact 4.
- the fixed contact that comes into contact with the movable contact 4 is such that the movable contacts 4 of the three adjacent movers 51 to 53 are opposed to the horizontally fixed contact 2a in common, and the other three movers 5 4 to 56 movable contacts 4 commonly face the horizontally long fixed contact 2b.
- the form of the fixed contact is not limited to this example.
- One fixed contact may be opposed to one movable contact, or one fixed contact common to six movable contacts may be opposed.
- the movable contact width is set to about 1.0 with respect to the fixed contact width 1.5.
- the feature of the third embodiment relates to the adjacent distance between the movers 51 to 56 of the same shape and the same size provided in parallel (FIG. 7 shows a three-phase A pole). And the B pole placed between the C poles), and let n 2 be the distance between the movers 51 and 56 adjacent to the other pole and the movers 52 and 55 adjacent to them.
- the distance between the other movers 52 and 53, 53 and 54, 54 and 55 is n "I
- the distance n2 is smaller than the distance n1.
- the position of the fixed contact 2 is provided on the assumption that all the movers are provided at equal intervals, whereas the movers 51 and 56 on both sides are located near the center of the mover group.
- the movable contacts 52 to 55 The movable contact 4 is provided opposite to the fixed contact at the center, while the movable contact 4 of the movers 51 and 56 has a center line that is 0.5 away from the center line of the fixed contact. Toward the center of the mover group The movers 51 and 56 are arranged so as to shift.
- FIG. 8 is a graph showing the surface current distribution of the first to sixth movers at the three-phase B pole composed of, for example, A pole, B pole, and C pole.
- large surface currents are concentrated on the first and sixth movers located at both ends. This is due to eddy currents caused by adjacent movers and the negative pole. Accordingly, the contact current repelling force acting on the mover adjacent to the other pole in the mover group of each pole and the electromagnetic force in the direction of the other pole (outer lateral direction) become more remarkable than those of the other movers.
- Various electromagnetic forces act on each mover according to the magnitude of the current flowing through it. In particular, the mover on the side adjacent to the other pole has a lateral electromagnetic force directed outward and fixed contacts.
- the movable contact When the resultant force of the contact repulsion, which is the repulsion between the movable contacts, is applied, the movable contact does not come into contact with the fixed contact on the original contact surface, that is, so-called stepping-off occurs, reducing the capacity for a short time.
- the positions of the movers 51 and 56 on the side adjacent to the other pole are arranged inward from the interval n1 to n2, so that the movable contact 4 before the stepping-off is caused. Moves on fixed contact 2 It is possible to secure a sufficient short-term power supply capacity by securing the coming margin and preventing derailment.
- FIG. 9 is a plan view showing a mover of a circuit breaker according to Embodiment 4 of the present invention.
- the figure shows an example in which three movers are arranged in parallel with one pole of three phases.
- the number of movers increases and decreases depending on the capacity of circuit breakers, etc., and is not limited to six.
- Each of the movers 51 to 56 is supported on the shaft 7 and is fixed to the shunt conductor 10 with fixing screws 20.
- the structure of the fixed contact is the same as that of the third embodiment.
- the feature of the fourth embodiment is that, among the movers in the mover groups 51 to 56, the width of the movers 51 and 56 adjacent to the other pole as viewed from the plane direction is the other mover 5 It is narrower than the width of 2 to 55.
- the width of the movers of the movers 52 to 55 is t1
- the width of the movers 51 and 56 adjacent to the other pole is set to t2 smaller than t1, and this portion is The cross section of the current path is reduced and the impedance is increased.
- the width of the movers 51 and 56 from the connection to the shunt conductor 10 to the tip is t2, which is smaller than t1, for processing reasons.
- the width from the connection with the shunt conductor 10 to at least the movable contact 4 should be reduced.
- the current distribution of each mover is as shown in FIG. Due to the current distribution, as described in the third embodiment, a large surface current flows to the mover adjacent to the other pole, and a large electromagnetic force tends to act.
- the contact repulsion between the contacts and the lateral electromagnetic force toward the other pole are significantly applied to the movers 51 and 56 on both sides. As a result, the force with which the movable contact is pressed against the fixed contact is weakened, and at the same time, the movable contact does not come into contact with the fixed contact on the original contact surface.
- the width of the movers 51 and 56 adjacent to the other pole is made narrower than that of the other movers 52 to 55, so that The impedance increases as the current-carrying cross-section decreases, and acts in a direction to cancel the drift of the current distribution shown in FIG.
- the surface current flowing through the movers 51 and 56 adjacent to the other pole is reduced, the remarkable lateral electromagnetic force applied to these movers is reduced, the contact can be prevented from being removed, and the contact repulsion can be prevented.
- the power is also reduced, resulting in an increase in short-time current carrying capacity.
- the present invention can be used for a circuit breaker having a large breaking capacity.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04705910A EP1732098A4 (en) | 2004-01-28 | 2004-01-28 | BREAKER |
PCT/JP2004/000759 WO2005073994A1 (ja) | 2004-01-28 | 2004-01-28 | 遮断器 |
CNB2004800017736A CN100359618C (zh) | 2004-01-28 | 2004-01-28 | 断路器 |
JP2005517349A JP4395134B2 (ja) | 2004-01-28 | 2004-01-28 | 遮断器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/000759 WO2005073994A1 (ja) | 2004-01-28 | 2004-01-28 | 遮断器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005073994A1 true WO2005073994A1 (ja) | 2005-08-11 |
Family
ID=34816449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/000759 WO2005073994A1 (ja) | 2004-01-28 | 2004-01-28 | 遮断器 |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1732098A4 (ja) |
JP (1) | JP4395134B2 (ja) |
CN (1) | CN100359618C (ja) |
WO (1) | WO2005073994A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200454525Y1 (ko) * | 2006-10-11 | 2011-07-11 | 현대중공업 주식회사 | 병렬 접촉부를 갖는 차단기 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009122584A1 (ja) * | 2008-04-04 | 2009-10-08 | 三菱電機株式会社 | 回路遮断器の短絡電流検出装置 |
DE102010015286A1 (de) * | 2010-04-13 | 2011-10-13 | Siemens Aktiengesellschaft | Schalter, insbesondere Lasttrennschalter |
WO2012017282A1 (en) * | 2010-07-31 | 2012-02-09 | Larsen & Toubro Limited | An improved contact arrangement for high fault current withstand in a low voltage switching device |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS639737U (ja) * | 1986-07-04 | 1988-01-22 | ||
JPS63146946U (ja) * | 1987-03-18 | 1988-09-28 | ||
JPH0290424A (ja) * | 1988-09-26 | 1990-03-29 | Mitsubishi Electric Corp | 回路しや断器 |
JPH02117024A (ja) * | 1988-09-08 | 1990-05-01 | Siemens Ag | 遮断器用通電ピボット |
JPH038222A (ja) * | 1989-06-06 | 1991-01-16 | Mitsubishi Electric Corp | 遮断器 |
JPH0452319U (ja) * | 1990-09-07 | 1992-05-01 | ||
WO2001052289A1 (en) * | 2000-01-11 | 2001-07-19 | Mitsubishi Denki Kabushiki Kaisha | Circuit breaker |
JP2003217428A (ja) * | 2002-01-18 | 2003-07-31 | Terasaki Electric Co Ltd | 回路遮断器 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2471608A (en) * | 1944-04-22 | 1949-05-31 | Ite Circuit Breaker Ltd | Circuit breaker contact construction |
US2695345A (en) * | 1950-04-19 | 1954-11-23 | Ite Circuit Breaker Ltd | Blow open, blow closed circuit breaker |
DE1465892A1 (de) * | 1964-03-02 | 1969-05-08 | Licentia Gmbh | Kontaktanordnung fuer Selbstschalter |
GB1053936A (ja) * | 1964-08-01 | |||
NL158644B (nl) * | 1969-03-25 | 1978-11-15 | Hazemeijer Bv | Elektrische schakelaar met elektrodynamische vergroting van de contactdruk en van de uitschakelsnelheid. |
DE3536112A1 (de) * | 1985-10-07 | 1987-04-09 | Siemens Ag | Kontaktanordnung fuer niederspannungs-leistungsschalter mit einem biegsamen stromband |
EP1414057B1 (en) * | 2001-08-02 | 2010-11-03 | Mitsubishi Denki Kabushiki Kaisha | Air circuit breaker |
-
2004
- 2004-01-28 JP JP2005517349A patent/JP4395134B2/ja not_active Expired - Fee Related
- 2004-01-28 WO PCT/JP2004/000759 patent/WO2005073994A1/ja not_active Application Discontinuation
- 2004-01-28 CN CNB2004800017736A patent/CN100359618C/zh not_active Expired - Fee Related
- 2004-01-28 EP EP04705910A patent/EP1732098A4/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS639737U (ja) * | 1986-07-04 | 1988-01-22 | ||
JPS63146946U (ja) * | 1987-03-18 | 1988-09-28 | ||
JPH02117024A (ja) * | 1988-09-08 | 1990-05-01 | Siemens Ag | 遮断器用通電ピボット |
JPH0290424A (ja) * | 1988-09-26 | 1990-03-29 | Mitsubishi Electric Corp | 回路しや断器 |
JPH038222A (ja) * | 1989-06-06 | 1991-01-16 | Mitsubishi Electric Corp | 遮断器 |
JPH0452319U (ja) * | 1990-09-07 | 1992-05-01 | ||
WO2001052289A1 (en) * | 2000-01-11 | 2001-07-19 | Mitsubishi Denki Kabushiki Kaisha | Circuit breaker |
JP2003217428A (ja) * | 2002-01-18 | 2003-07-31 | Terasaki Electric Co Ltd | 回路遮断器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1732098A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200454525Y1 (ko) * | 2006-10-11 | 2011-07-11 | 현대중공업 주식회사 | 병렬 접촉부를 갖는 차단기 |
Also Published As
Publication number | Publication date |
---|---|
EP1732098A1 (en) | 2006-12-13 |
CN100359618C (zh) | 2008-01-02 |
JPWO2005073994A1 (ja) | 2007-07-26 |
CN1777968A (zh) | 2006-05-24 |
JP4395134B2 (ja) | 2010-01-06 |
EP1732098A4 (en) | 2009-05-13 |
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