• 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:
    The present invention relates to a demonstration trip device for a circuit breaker, and to easily adjust the rated current of the demonstration trip. To this end, the present invention is interposed between the bimetal and the trip cross bar through the thermal bar formed uniaxially over each pole to interlock according to the curvature of the bimetal of each pole, so as to adjust the gap at the central pole of the thermal bar, the rating of each pole Allow current regulation.
    公开号:KR19980061626A
    申请号:KR1019960080997
    申请日:1996-12-31
    公开日:1998-10-07
    发明作者:김종구
    申请人:이종수；엘지산전 주식회사；
    IPC主号:
    专利说明:

    Circuit breakers with thermal bars
    BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a demonstration trip device for a circuit breaker, wherein a rated current can be adjusted by interposing a thermal bar between a bimetal and a trip cross bar.
    Wiring breaker is a device for overcurrent protection of low voltage indoor converter in electric equipment. It has the function of opening / closing load current and fault current and reusing after breaking operation.
    1 is a configuration diagram of a general wiring breaker shown mainly on the center pole. This will be described based on the drawings.
    The case 5 and the cover 6 of the main body are made of an insulating resin material to prevent the exposing of the charging part, and the component parts are roughly divided into tripping devices and opening and closing devices.
    The trip device detects the occurrence of overcurrent on the converter to operate the switchgear, and performs the demonstration trip and the forward seat operation according to the overcurrent characteristics.
    The bimetal 70 and the fixing core 71 are attached to the heater 72, and the heater is connected to the load terminal block 73. The armature 74 is a projection formed on both sides can be fixed to the case can be rotated back and forth, the trip screw 700 of the bimetal and the upper projection of the armature trip trip bar 75 is formed uniaxially across each pole and Adjacent.
    The switchgear has a mechanism part, a fixed contact point 810, and a movable contact point 820 that operate according to the operation of the trip device.
    The fixed contact 810 is attached to the fixed contact 81 connected to the power supply terminal 80, the movable contact 820 is attached to the bottom of the movable contact (82). A holder 83 is connected to the shaft 830 formed uniaxially across each pole, and the holder 83 fixes the movable contact 82. The movable contact 82 can be rotated up and down about the fixed shaft 831 fixed to the side plate 84, and the grid 85 is located outside the rotation space of the movable contact 82.
    The mechanism part is formed only in the center pole. The latch 86 pivots up and down about the latch pin 840 fixed to the side plate 84, and is caught by a latch holder 860 associated with the trip cross bar 75. The upper link 861 and the toggle link 862 are connected by the link pin 863 to bend, the toggle link is connected to the holder 83 by the holder pin 832, the upper link is the upper link pin 864 Is connected to the latch 86. The link pin is hung on a spring 88 attached to the lever 87, and a handle 89 for manual operation is attached to the lever 88.
    Under normal conditions, circuit breakers carry current.
    When an overcurrent exceeding the rated current flows, the bimetal 70 flexes and the trip screw 700 presses the trip cross bar 75 to perform a trial trip operation, and when a large current such as a short circuit current occurs, a strong formed on the fixing core 71 is generated. The armature 74 is instantaneously attracted to the magnetic field to perform the forward seat operation of pressing the trip cross bar 75. Since the trip crossbar is formed uniaxially over each pole, the same trip operation occurs even if an overcurrent occurs at either pole.
    When the trip crossbar rotates to push the latch holder 860, the latch 86 held by the latch holder is released, and the upper link 861 and the toggle link 862 are pulled by the tension of the spring 88 pulling the link pin 863. ) Is bent, and the contacts 83 and 820 are opened as the holder 83 and the movable contact 82, which are connected to the toggle link, bounce upwards rapidly. Since the holder 83 and the movable contact 82 of each pole are coaxially connected to the shaft 830, the contacts of each pole are also simultaneously opened in accordance with the contact opening of the center pole.
    At this time, the arc generated at the contact is absorbed by the grid 85 and disappears to complete the interruption.
    In the conventional circuit breaker as described above, the rated current adjustment of the demonstration trip is performed by changing the gap between the bimetal trip screw 700 and the trip cross bar 75.
    2, when the trip screw 700 pushes the trip cross bar 75 due to the bending of the bimetal 70, the trip cross bar rotates about the axis 751, thereby demonstrating a trip operation. The rated current changes according to the size of the gap a. In other words, if the gap is small, the bimetal and the trip cross bar are in contact with each other at a smaller curvature, resulting in a smaller rated current, and a larger gap results in the opposite effect. Therefore, the rated current can be adjusted by adjusting the gap a by turning the bimetal trip screw 700 to the left and right.
    However, in the case of adjusting the rated current as described above, it is necessary to change and adjust the gap of each pole by the same amount, so that the operation is difficult and precise adjustment is difficult.
    The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to improve the structure of a demonstration trip device for a circuit breaker in order to easily adjust the rated current.
    In order to achieve the above object, the present invention is interposed between the bimetal and the trip cross bar through the thermal bar formed uniaxially over each pole to interlock according to the curvature of the bimetal of each pole, to adjust the gap in the central pole of the thermal bar Therefore, it is possible to adjust the rated current of each pole.
    1 is a side configuration diagram of a conventional circuit breaker
    2 is an explanatory diagram showing a gap between a trip cross bar and a bimetal;
    3 is a perspective view showing a configuration of the present invention
    4 is a detailed view of the thermal bar partial coupling of FIG.
    5 is an explanatory diagram showing the action of the stopper and the coupling groove;
    Figure 6 is a detailed view of the thermal bar partial coupling of Figure 3
    Fig. 7 is a schematic diagram showing the arrangement and gap of bimetal, thermal bar and trip cross bar.
    8 is a perspective view showing another embodiment of the present invention
    Explanation of symbols for the main parts of the drawings
    1: Thermal Bar 2: Clip
    3: Thermal Cap 4: Contact Trip Screw
    10 contact bar 11 protrusion
    12: rib 13: spring support plate
    14: stopper 30: tripping protrusion
    50: coupling groove 51: clip groove
    52: spring groove 53: rib groove
    54: spring
    Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, the same or equivalent parts as in the prior art will be described with the same reference numerals.
    Fig. 3 is a schematic perspective view of essential parts showing the structure of the present invention, and Figs. 4 to 6 are partial details. In the drawings, parts except for the demonstration trip device are omitted.
    The thermal bar 1 is interposed between the bimetal 70 and the trip cross bar 75, and both ends thereof are fitted to the clip 2 to be hinged to the case 5 to rotate about an axis. Each pole is formed with a contact bar 10 having a protrusion 11 at the contact with the bimetal 70, and a rib 12 and a spring support plate 13 are formed between the poles. The thermal cap 3 having the tripping protrusion 30 is covered on the upper portion of the center pole contact bar. The bimetal 70 does not have a trip screw 700 attached thereto.
    4 shows a terminal bonding structure of the thermal bar 1.
    A stopper 14 is disposed on the bottom of the distal end of the thermal bar 1, and the coupling groove 50 and the clip groove 51 are formed in the case 5. Insert the distal end of the thermal bar (1) into the coupling groove 50, the fork-shaped clip (2) from the top into the clip groove 51 to fix.
    As the thermal bar rotates, the stopper 14 is caught by the wall of the coupling groove 50 of the case 5 as shown in FIG. 5. Accordingly, the rotation width of the thermal bar is limited to a certain angle.
    6 is a detailed view showing a coupling structure of the rib 12, the spring support plate 13, and the case 5. As shown in FIG.
    A spring groove 52 and a rib groove 53 are formed in the case 5, and a spring 54 is installed in the spring groove. When the thermal bar 1 is coupled to the case, the rib 12 and the spring support plate 13 are fitted to the rib groove 53 and the spring groove 52, respectively.
    Referring to the operation of the present invention having the above configuration as follows.
    When the bimetal 70 is bent due to the generation of an overcurrent, the bimetal presses the protrusion 11 formed on the contact bar 10 of the thermal bar 1, whereby the thermal bar rotates forward, and the thermal cap is covered by the central pole. The tripping protrusion 30 of (3) presses the trip cross bar 75 to cause a tripping operation, and the power is cut off.
    When the thermal bar is rotated forward by a predetermined angle or more, the stopper 14 is caught by the coupling groove 50, thereby preventing rotation of the thermal bar. In addition, as the thermal bar rotates, the spring support plate 13 presses the spring 54 inserted into the spring groove 52 of the case 5, and the rotation continues to receive the repulsive force by the spring.
    When the shutdown is complete and the bimetal has cooled down and the pressure on the thermal bar disappears, the spring repels the thermal bar back to its original position. When it is restored to its original position, the thermal bar can maintain the correct gap with the bimetal because the stopper at the end of the thermal bar again contacts the wall of the coupling groove to prevent further rotation. Thus, the thermal bar 1 is balanced by the repulsive force of the spring 54 which the spring support plate 13 receives, and the drag force of the wall of the engaging groove 50 which the stopper 14 receives.
    The rib 12 formed in the thermal bar has a function of ensuring smoothness of rotation during the rotation operation of the thermal bar as described above.
    In order to adjust the rated current, it is necessary to adjust the gap b between the trip cross bar 75 and the thermal bar 1 or the gap c between the thermal bar 1 and the bimetal 70 as shown in FIG. Since the gap c is fixed, the rated current can be adjusted by adjusting the gap b.
    To this end, the thermal caps 3 having different lengths of the tripping protrusions 30 are used interchangeably. That is, when the thermal cap having a long tripping protrusion is used, the gap b is shortened to decrease the rated current. To increase the rated current, the gap b is shortened by replacing the thermal cap having a short tripping protrusion.
    Thus, the biggest advantage of changing the rated current by adjusting the gap b is that if the gap c is adjusted, the gap of each pole must be accurately adjusted by the same amount so that the bending deviation of the bimetal does not occur. Only the thermal cap of the pole needs to be replaced. This is possible by transferring bimetal curvature of each pole through a central pole to a trip crossbar via a medial uniaxially formed thermal bar across each pole.
    Therefore, in the case of adjusting the rated current by the above method, not only the adjustment is easy but also the adjustment deviation of each pole does not occur.
    8 shows another embodiment of the present invention.
    The contact trip screw 4 is attached to the center pole contact bar 10 of the thermal bar 1, and the gap b is adjusted by turning the screw during adjustment of the rated current.
    In the case of the present embodiment, the gap adjustment is performed by moving the contact trip screw back and forth, so that a separate thermal cap is unnecessary.
    As described above, the present invention facilitates adjustment of the demonstration trip rated current by interposing a thermal bar between the trip cross bar and the bimetal.
    An object of the present invention is to be able to easily adjust the rated current in the demonstration trip device of the circuit breaker.
    权利要求:
    Claims (5)
    [1" claim-type="Currently amended] In a circuit breaker having a trip cross bar 75 and a bimetal 70 as a demonstration trip device, the circuit breaker is coupled to the case 5 via a thermal bar 1 between the trip cross bar 75 and the bimetal 70. In addition, the thermal bar is provided with a contact bar 10 having a protrusion 11 and a thermal cap 3 having a tripping protrusion 30 covering the contact bar of the central pole, so that the curvature of the bimetal 70 is projected 11. Press) to rotate the thermal bar (1), the tripping projection 30 is a circuit breaker with a thermal bar, characterized in that the demonstration trip occurs by pressing the trip cross bar (75).
    [2" claim-type="Currently amended] The coupling groove 50 and the clip according to claim 1, wherein the stopper 14 is formed on the bottom of the distal end of the thermal bar 1, and the case 5 has a structure for limiting the rotational width of the stopper 14. Forming the groove 51, the end of the thermal bar 1 is inserted into the coupling groove 50, the clip 2 is inserted into the clip groove 51 to secure the case to the circuit breaker with a thermal bar, characterized in that .
    [3" claim-type="Currently amended] The spring groove according to claim 1, wherein ribs 12 and spring support plates 13 are formed between the poles of the thermal bars 1, and rib grooves 53 and springs 54 are provided in the case 5, respectively. 53) to form a circuit breaker with a thermal bar, characterized in that to restore the repulsive force of the spring (54) at the time of rotation of the thermal bar (1).
    [4" claim-type="Currently amended] The method of claim 1, wherein the rated current is adjusted by adjusting the gap b between the tripping protrusion and the trip cross bar 75 by replacing and using the thermal cap 3 having different lengths of the tripping protrusion 30. Circuit breaker with bar.
    [5" claim-type="Currently amended] A contact trip screw (4) is attached to the center pole contact bar (10) of the thermal bar (1) of the circuit breaker between the trip cross bar (75) and the bimetal (70) via the thermal bar (1). A circuit breaker with a thermal bar, characterized in that the rated current is adjusted by turning the gap (b).
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    同族专利:
    公开号 | 公开日
    KR100198099B1|1999-06-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1996-12-31|Application filed by 이종수, 엘지산전 주식회사
    1996-12-31|Priority to KR1019960080997A
    1998-10-07|Publication of KR19980061626A
    1999-06-15|Application granted
    1999-06-15|Publication of KR100198099B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019960080997A|KR100198099B1|1996-12-31|1996-12-31|The circuit breaker with thermal bar|
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