(Extracted from wipo)
Title of invention: Drawer type circuit breaker
Technical field
[0001]
　The present invention relates to a drawer type circuit breaker including a circuit breaker and a terminal device.
Background art
[0002]
　In a conventional terminal device for a drawer type circuit breaker, terminals and connectors of each phase are sandwiched from left and right by an insulating base, and are fixed in a state where side plates (left and right) and angles (up and down) are combined (for example, Patent Document 1). reference). The side plate and the angle constitute a drawer frame for drawing out or inserting the circuit breaker.
　Moreover, the insulation base mounted so that the insulation between each phase terminal may be ensured may be comprised by the box shape. (For example, see Patent Document 2)
Prior art documents
Patent Literature
[0003]
Patent Document 1: Japanese Patent Laid-Open No. 2009-55732
Patent Document 2: Japanese Patent Laid-Open No. 11-250776
Summary of the Invention
Problems to be solved by the invention
[0004]
　The terminal device of the conventional drawer type circuit breaker is configured as described above, and there has been a problem in that when assembling, the left and right insulating bases must be combined, and the side plate and angle must be combined. In addition, when performing maintenance and replacement of the connector, terminal, and insulating base, it is necessary to disassemble the drawer frame. Furthermore, when the product specifications are different, there is a problem that a dedicated insulating base is required.
[0005]
　The present invention has been made to solve the above-described problems. In the terminal device of the drawer type circuit breaker, the drawer type circuit breaker can be easily assembled and can be added / removed individually for each phase. A terminal device for a container is obtained.
Means for solving the problem
[0006]
　The drawer type circuit breaker according to the present invention includes a drawer frame, a circuit breaker body that can be mounted on the drawer frame by moving with a guide guide, a circuit breaker-side conductor projecting from the circuit breaker body, and a drawer frame. The terminal unit includes a terminal unit that is detachably provided in phase units. The terminal unit includes an insulating base, a lead frame side conductor that is inserted into the base and is detachably fixed, and an insulation of the lead frame side conductor. A connector that engages with one end protruding from the base and is detachably connected to the breaker side conductor, and a terminal at the other end of the lead frame side conductor.
The invention's effect
[0007]
　According to the drawer type circuit breaker of the present invention, assembly, maintenance, and phase number change of the terminal unit can be easily performed.
Brief Description of Drawings
[0008]
FIG. 1 is a perspective view of a drawer type circuit breaker according to Embodiment 1 of the present invention in a drawn state.
FIG. 2 is a perspective view of a state in which the drawer type circuit breaker according to Embodiment 1 of the present invention is inserted.
3 is a rear view showing attachment / detachment of the terminal unit of the drawer type circuit breaker shown in FIG. 1. FIG.
FIG. 4 is an exploded perspective view of a terminal unit of the drawer type circuit breaker according to Embodiment 1 of the present invention.
5 is a top cross-sectional view of the terminal portion in the state of FIG.
6 is a top cross-sectional view of the terminal portion in the state of FIG.
7 is an enlarged view of the terminal unit of FIG.
FIG. 8 is an explanatory diagram when a terminal unit is added according to Embodiment 1 of the present invention.
FIG. 9 is an explanatory diagram for explaining an example of changing a terminal conductor of a drawer type circuit breaker according to Embodiment 2 of the present invention.
FIG. 10 is an explanatory diagram for explaining another example of changing the terminal conductor of the drawer type circuit breaker according to the second embodiment of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
[0009]
Embodiment 1 FIG.
　FIG. 1 is a perspective view showing a pulled-out circuit breaker in the first embodiment of the present invention, and FIG. 2 is a perspective view showing a state in which the pulled-out circuit breaker is inserted in the first embodiment.
　As shown in FIGS. 1 and 2, the drawer-type circuit breaker 100 includes a drawer-type circuit breaker main body 10 and is housed in, for example, a casing (not shown) of a closed switchboard so that it can be pulled out. A terminal device 7 is mounted on the back surface of the drawer type circuit breaker 100. As is well known, the drawer-type circuit breaker body 10 includes a fixed contact and a movable contact, and the movable contact is operated by operating an operation handle (not shown) provided on the surface side of the drawer-type circuit breaker body 10. Is disconnected from the fixed contact, and the circuit is closed, and the movable contact is brought into contact with the fixed contact to close the circuit. Further, when an overcurrent flows in the circuit, the movable contact is automatically separated from the fixed contact by a tripping mechanism to shut off the circuit.
[0010]
　The terminal device 7 is composed of terminal units 71, 72, 73 configured for each phase, and when placed in the drawer frame 9 as shown in FIG. 3, it can be inserted and removed in the directions of arrows A and B. It is fixed between the side plates 9a, 9b constituting the drawer frame 9. Each terminal unit 71, 72, 73 has a terminal conductor 5 (input-side terminal conductor 5a, output-side terminal conductor 5b). For example, when the input side terminal conductor 5a is housed in a casing of a closed switchboard, it is connected to a connection conductor (not shown) on the power supply side, and the output side terminal conductor 5b is connected to a load side connection conductor (not shown). ).
　The draw-out type breaker body 10 is fitted with a breaker-side conductor 11 and is pulled out by an extendable guide guide 12 mounted on the drawer frame 9 by a pull-out handle and a pull-out mechanism (not shown) for inserting and removing the breaker body. Move in the direction. Thereby, the circuit breaker-side conductor 11 is inserted into and removed from the connector 4 (see FIG. 4) connected to the terminal conductor 5, and functions as a drawer-type circuit breaker 100.
[0011]
　FIG. 4 is an exploded perspective view of the terminal unit 71. A relay terminal conductor 2 extending in the X-axis direction from the bottom portions 21a and 21b and having a Y-shaped tip 2a is screwed into a screw hole provided on the surface of the insulating base 1 with a small screw 3. The connector 4 arranged so that the breaker-side conductor 11 is fitted in the Z-axis direction is connected to the relay terminal conductor 2. The connector 4 and the relay terminal conductor 2 are connected by inserting the Y-shaped tip 2a of the relay terminal conductor 2 into the groove 4a of the connector 4. The members constituting the distal end portion 2a and the groove 4a have elasticity, the outer surface of the Y shape is engaged with the groove 4a, and the inner wall surface of the groove 4a and the outer surface of the Y shape are pressed against each other. Thus, the engagement is strengthened, and when the breaker-side conductor 11 is pulled out, it serves as a stopper so that the relay terminal conductor 2 and the connector 4 are not detached. Further, when the breaker-side conductor 11 is inserted, the connector 4 swings, and the engagement surface between the tip 2a and the groove 4a serves as a fulcrum for the swing operation.
[0012]
　The input-side terminal conductor 5a and the output-side terminal conductor 5b extend in the X-axis direction from the bottom portions 51a and 51b extending in the XY plane in the direction opposite to the tip portion 2a, and the terminal portions are parallel to the XY plane. Placed in. In the first embodiment, the bottom portions 51a and 51b have a square shape with the same length of the four sides, and the terminal portion includes a line connecting the midpoints of the opposite sides of the square shape, It is formed perpendicular to 51b. The bottom portions 51 a and 51 b are inserted into the insulating base 1 and fixed to the bottom portions 21 a and 21 b of the relay terminal conductor 2 with bolts 6. In this embodiment, the number of bolts 6 is four, and the relay terminal conductor 2 and the input side or output side terminal conductors 5a and 5b are fixed. However, the number of bolts is not limited to this. Further, any fixing device other than bolts may be used as long as it can be removed.
[0013]
　The insulating base 1 has a groove perpendicular to the input-side terminal conductor 5a and the output-side terminal conductor 5b that can be seen through between the conductors at the center between the fixed input-side terminal conductor 5a and the output-side terminal conductor 5b. 8 is formed. Thereby, an air path is formed between the upper and lower circuit breaker-side conductors 11 by fitting the circuit breaker-side conductor 11 with the connector 4 in the Z-axis direction. With such a configuration, the terminal unit 71 can be cooled by natural convection.
　Similarly to the terminal unit 71, the terminal units 72 and 73 are also configured. Further, in the first embodiment, the relay terminal conductor 2 and the terminal conductor 5 are configured as separate members, and the lead frame side conductor is formed by being screwed. If the specification is not changed, it may be integrally molded and inserted into the insulating base 1 and fixed.
[0014]
　5 is a top sectional view of the terminal device 7 in the state of FIG. 2 with the drawer-type circuit breaker body 10 inserted into the drawer frame 9, and FIG. 6 is the state of FIG. 1 in which the drawer-type circuit breaker body 10 is pulled out. FIG. 7 is an enlarged view of the terminal unit 71 of FIG.
　In FIG. 5, the circuit breaker-side conductor 11 is inserted into the connector 4 in a state where the drawer-type circuit breaker body 10 is inserted into the drawer frame 9. As shown in FIG. 6, the circuit breaker-side conductor 11 is also pulled out from the connector 4 when the drawer-type circuit breaker body 10 operates in the direction (arrow C direction) pulled out from the drawer frame 9 from this state. At this time, as shown in FIG. 7, the connector 4 is hooked on the Y-shape of the distal end portion 2 a of the relay terminal conductor 2, and the connector 4 is engaged with the breaker-side conductor 11 while being inserted into the relay terminal conductor 2. The pull-out type breaker body 10 and the guide guide 12 (members 12a and 12b) mounted on the drawer frame 9 are pulled out (see FIG. 1).
[0015]
　In addition, as shown in FIG. 8, the drawer | drawing-out frame 9 can be expanded for one phase in the arrow D direction, and the terminal unit 74 can be inserted, and it can expand easily.
[0016]
　As described above, in the first embodiment, the terminal device 7 is constituted by the terminal units 71, 72, 73, and the terminal conductor 5 is formed by the screw holes formed on the surface of the insulating base 1 of the terminal units 71, 72, 73. Since the lead frame side conductor constituted by the relay terminal conductor 2 is screwed, it is no longer necessary to hold the left and right insulating bases together until the side plates and angles are combined. Furthermore, the lead frame side conductor can be easily removed with screws, and can be easily replaced. In addition, the terminal units 71, 72, 73 can be easily inserted into and removed from the drawer frame 9, and when the connector 4, the relay terminal conductor 2, the terminal, and the insulation base are to be maintained and replaced, No need to disassemble. Also, it is possible to easily add terminal units according to the number of phases. Further, since the terminal portion is composed of the phase-unit terminal units 71, 72, 73, assembly / specification change can be simplified, and maintenance for each phase can be performed during maintenance.
[0017]
Second
　Embodiment In the first embodiment, the terminal conductor 5 is arranged in parallel to the XY plane as shown in FIG. 4, but the bottom 51a of the terminal conductor 5 has a square shape. In the second embodiment, as shown in FIG. 9, the bolt 6 is removed, the terminal conductor 5 is rotated 90 degrees, and the bolt 6 is fixed to the relay terminal conductor 2 again, whereby the connection direction of the terminal conductor 5 is changed to the XZ plane. Can be changed parallel to Here, Fig.9 (a) shows the side view of a drawer circuit breaker, FIG.9 (b) shows a rear view. Moreover, if it replaces with the terminal conductor 50 as shown in FIG. 10, it will become possible to connect from the front of the drawer type circuit breaker 100.
[0018]
　As described above, in the second embodiment of the present invention, according to the embodiment of the present invention, the terminal conductor 5 is fixed to the relay terminal conductor 2 visible from the outside of the insulating base 1 with a bolt. Thus, there is an effect that it is possible to easily select a terminal specification that enables busbar wiring according to the application.
[0019]
　It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted. Further, in the drawings, the same reference numerals indicate parts having the same or corresponding configurations and functions.
Explanation of symbols
[0020]
　DESCRIPTION OF SYMBOLS 1 Insulation base, 2 relay terminal conductor, 3 machine screw, 4 connector, 5, 50 terminal conductor, 6 bolt, 7 terminal device, 71, 72, 73 terminal unit, 8 groove, 9 drawer frame, 10 drawer type circuit breaker body , 11 Breaker side conductor, 12 Guide guide, 100 Pull-out type circuit breaker.
The scope of the claims
[Claim 1]
　A circuit breaker body that can be mounted on the drawer frame, moved by a drawer frame and a guide guide, a circuit breaker-side conductor projecting from the circuit breaker body, and a terminal that is detachably disposed on the drawer frame for each phase. The terminal unit is engaged with an insulating base, a lead frame side conductor inserted into the insulating base and fixed removably, and one end of the lead frame side conductor protruding from the insulating base. A drawer type circuit breaker having a connector detachably connected to the circuit breaker side conductor and a terminal at the other end of the drawer frame side conductor.
[Claim 2]
　The drawer-type circuit breaker according to claim 1, wherein one end of the drawer frame conductor engaged with the insulating base has a Y-shaped tip.
[Claim 3]
　The two lead frame conductors of the power supply side terminal and the load side terminal are inserted and fixed to the insulation base, and an air path is formed in the insulation base between the power supply side terminal and the load side terminal. The drawer type circuit breaker according to claim 1 or 2, characterized by the above.
[Claim 4]
　The lead frame side conductor is composed of a terminal conductor on which a terminal is formed and a relay terminal conductor having a Y-shaped tip, and the bottom of the relay terminal conductor is screwed to the insulating base, and the terminal conductor is connected to the relay 2. The drawer type circuit breaker according to claim 1, wherein the terminal type conductor is screwed to the terminal conductor.
[Claim 5]
　The bottom of the terminal conductor screwed to the relay terminal conductor has a square shape, and the terminal is formed perpendicular to the bottom including a line connecting midpoints of opposite sides of the square shape. The drawer-type circuit breaker according to claim 4, wherein: