• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker that serves to protect an electric wire or an electric device connected to a load terminal by blocking an electric current when an overcurrent or a short circuit fault current occurs on an electric line, and detects an overcurrent or short circuit fault current. The structure of the trip detection device is improved to increase the instantaneous current value under the same condition as the conventional device, thereby allowing the user to vary the selection range of the instantaneous operation. The present invention provides a tripping circuit for a circuit breaker having a fixing core in which a magnetic force is induced to generate a suction force when a short-circuit accident current is generated, and an armature that releases an opening / closing mechanism while being attracted to the fixing core side when a suction force is generated in the fixing core. The mechanism is a trip detection device of a circuit breaker in which an auxiliary protrusion having a bent shape which increases the number of magnetic fluxes to increase the attraction force of the amateur to the fixing core is integrally formed on the amateur.
    公开号:KR20000042990A
    申请号:KR1019980059290
    申请日:1998-12-28
    公开日:2000-07-15
    发明作者:김학진
    申请人:이종수；엘지산전 주식회사；
    IPC主号:
    专利说明:

    Trip detection device of circuit breaker
    The present invention relates to a circuit breaker that serves to protect an electric wire or an electric device connected to a load terminal by detecting an abnormal current and blocking an electric current when an overcurrent or a short circuit fault current occurs on an electric line. The present invention relates to a trip detection device that detects an overcurrent or a short circuit fault current and cuts off a circuit.
    In general, a circuit breaker includes a case and a cover for accommodating and supporting all parts and maintaining insulation of the main conducting portion, a load terminal fixed to one side of the case and a power terminal fixed to the opposite side, and the load side terminal and the power terminal. Switching mechanism part for turning on / off the circuit by electrically connecting or disconnecting, detector part for detecting tripping part when overcurrent or short-circuit current occurs, and extinguishing arc generated when opening and closing the contact of terminal It is made up of a small number of fire extinguishers.
    Therefore, when an abnormal current flows on the electric line, the detector mechanism detects this and trips, and the circuit between the power supply terminal and the load terminal is blocked by the switch mechanism.
    1 is a block diagram illustrating a trip detector portion of a conventional circuit breaker. The conventional trip detection apparatus includes a bimetal (1) that performs a demonstration operation when an overcurrent occurs, and a heater that connects the trip mechanism and the switching mechanism to transfer heat to the bimetal when an overcurrent occurs. (2), Fixing Core (3), which attracts the magnetic force when the short-circuit accident current is generated to generate a suction force, and Amateur (magnetic) that releases the opening and closing mechanism by being sucked to the fixing core side when the short-circuit accident current occurs (4), a conductor (6) and a terminal plate (5) connecting the heater and the load side terminal block, and an adjusting screw (7) for adjusting the demonstration operation time.
    In the trip detector mechanism as described above, when an overload occurs to cause instantaneous operation, magnetic induction occurs in the fixing core 3 by the overload current passing through the switching mechanism, so that the armature 4 moves to the fixing core 3 side. At this time, the time when the armature 4 is sucked is influenced by the strength of the magnetic field induced in the fixing core 3.
    Fig. 2 is a perspective view of an amateur applied to the conventional apparatus, and since the armature 4 of this shape has no structure for increasing the magnetic flux, the magnetic field strength of the fixing core 3 can be increased to increase the suction force. There was only.
    Therefore, when the apparatus is enlarged and the suction force of the armature 4 is not large enough for the miniaturization of the apparatus, even if an overload occurs, the trip detector mechanism fails to release the opening / closing mechanism, causing malfunctions. There is a drawback that limits the choice of.
    SUMMARY OF THE INVENTION An object of the present invention is to provide a trip detection device of a circuit breaker, in which the attraction force can be increased as compared to the conventional device when the amount of magnetic field induced in the fixing core is improved by improving the structure of the amateur.
    According to an embodiment of the present invention for achieving the above object, a fixing core that is induced when the short circuit accident current is generated to generate a suction force, and when the suction force is generated in the fixing core is sucked toward the fixing core side to release the opening and closing mechanism part In a trip detector of a circuit breaker having a magnetic body, which is a magnetic body, a circuit in which an auxiliary protrusion having a bent shape for increasing the number of magnetic fluxes is formed integrally with the amateur so that the attraction force of the amateur to the fixing core is increased. A trip detection device of a breaker is provided.
    1 is a block diagram showing a trip detection mechanism of a conventional circuit breaker
    2 is a perspective view of an amateur applied to a conventional device
    3 is a block diagram showing a trip detection mechanism according to the device of the present invention;
    4 is a perspective view of an amateur applied to the device of the present invention;
    Explanation of symbols for main parts of the drawings
    3: fixing core 4: amateur
    4a: auxiliary protrusion
    3 is a configuration diagram illustrating a trip detection device of a circuit breaker according to the present invention, and FIG. 4 is a perspective view of an amateur.
    In the present invention, the bimetal (1) that performs the demonstration operation when the overcurrent occurs, the heater (2) for transferring heat to the bimetal when the overcurrent occurs, and the fixing core (3) for generating a suction force is induced by the magnetic force when the short-circuit accident current is generated, When the short circuit accident current is drawn to the fixing core side, the armature (4) to release the opening and closing mechanism, the conductor (6) and the terminal plate (5) connecting the heater and the load side terminal block, and adjusts the demonstration operation time The basic components of the adjusting screw 7 and the like are the same as in the conventional apparatus.
    At the lower end of the rotation point of the armature 4, an auxiliary protrusion 4a having a bent shape is formed.
    In the trip detection device of the present invention as described above, when an overload current occurs, a magnetic flux is generated in the fixing core 3 by the current, and the magnetic flux is transferred to a suction force that attracts the amateur 4 by an induction action. (4) is attracted to the fixing core (3) while rotating, the bent shape of the auxiliary projection (4a) is applied to the armature (4) applied to the apparatus of the present invention per unit area by the auxiliary projection (4a) As the number of magnetic fluxes induced is increased, the suction force between the fixing core 3 and the armature 4 is increased in the end.
    Therefore, when an overload current of the same value is applied on the electric line, the instantaneous current value is increased as compared with the conventional apparatus, and this increase of the instantaneous current value frees the selection of the instantaneous operating range.
    In the circuit breaker, a sample equipped with a device according to the present invention and a sample equipped with a conventional device were made to check an initial instantaneous operating range upon application of an overload current, and the sample was composed of a sample having the same rating (125A).
    As a result, the experimental results as shown in the following table were obtained, and it was found that the instantaneous current value was greatly increased as compared with the conventional apparatus.
    divisionInstantaneous current value SpeciesInvention 1 time905A1782A Episode 2848A1612A 3rd time891A1103A
    According to the present invention, when the same amount of generated magnetic field is generated when the same current flows through the fixing core in the circuit breaker, the unit area of the number of magnetic flux induced in the armature is wider than in the conventional apparatus, and thus the instantaneous current at the trip detector part is increased. As the value is increased, the range of instantaneous operation is widened so that it can be applied to the low overload current range, so that it can easily respond to various needs of users.
    权利要求:
    Claims (2)
    [1" claim-type="Currently amended] A circuit breaker having a fixing core (3) for generating a suction force by generating a magnetic force when a short-circuit accident current is generated, and an armature (4), which is a magnetic material that is attracted to the pixie core side when the suction force is generated in the fixing core, and releases the switch mechanism part. In the trip detector of
    And a bent formed auxiliary protrusion (4a) integrally formed in the armature so as to increase the number of magnetic fluxes so that the attraction force of the armature against the fixing core is increased.
    [2" claim-type="Currently amended] The method of claim 1,
    Trip detection device of the circuit breaker wherein the auxiliary projection is formed at the lower end of the armature rotation point.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1998-12-28|Application filed by 이종수, 엘지산전 주식회사
    1998-12-28|Priority to KR1019980059290A
    1998-12-28|Priority claimed from KR1019980059290A
    2000-07-15|Publication of KR20000042990A
    2001-05-02|Application granted
    2001-05-02|Publication of KR100287918B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019980059290A|KR100287918B1|1998-12-28|Trip detection device of circuit breaker|
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