CN1624847A - Molded case circuit breaker - Google Patents

Abstract

The invention provides a plastic shell disconnector, and is the improvement of the present plastic shell disconnector. It includes: the base, the front and the back end respectively has the switch body chamber for the equipment of the switch body and the stripping device chamber with a box for the stripping device; a cover on the base; a set of electric isolation rest that joints the base and the cover and has electric isolation function to this disconnector, and its characteristics is that the set of the electric isolation rest is extendedly arranged on either of the box of the stripping device or the cover. Because of the improvement of this invention, the containing chamber not only has the upper open mounting hole, but also has the non-blocking mounting hole at the back, when the stripping device is equipped in the containing chamber, it can be arranged up and down or back and front. The installation and the replacement are convenient and agile.

Description

Molded case circuit breaker

technical field

The invention relates to a molded case circuit breaker, which is an improvement to the existing molded case circuit breaker and belongs to general electric appliances.

Background technique

Molded case circuit breaker, as a general electrical appliance, is widely used because of its compact structure, low price and good working reliability. In recent years, in order to meet the requirements of use, the functions of circuit breakers have been continuously expanded. Both international and domestic manufacturers are actively adopting modular and building block assembly. At present, the common molded case circuit breaker has two main modules, the switch main body and the main trip, plus auxiliary modules such as shunt release, undervoltage release, auxiliary contact, alarm contact, and electric operating mechanism. It can be assembled into circuit breakers with various functions according to the needs.

However, the applicant found that although the above-mentioned circuit breaker is assembled through modularization and building blocks, its functions are becoming more and more perfect. However, there are some structural defects in the casing of the above-mentioned molded case circuit breaker. The current common molded case circuit breaker shown in FIG. There are three quadrupoles), and the first connecting plate 5 of the switch main body is located below the base 1. The electrical isolation seat 4 is used to connect the base 1 and the cover 6 and to connect the interphase terminals 2 of the circuit breaker. Act as electrical isolation.

The tripping device 8 is installed in the cavity 3 of the base 1. Under the current development trend of circuit breaker modularization and volume miniaturization, the above structure will give the tripper The installation brings great inconvenience, mainly because the electrical isolation seat 4 is integrally arranged on the base 1. When the tripping device 8 is installed into the cavity 3 by its box body 9, it will be affected by the cavity 3. Space is limited, because the cavity 3 is an installation opening that only has an open top, and the dimensions of the cavity 3 and the box body 9 are compatible. Also, in order to realize that the second coupling plate 7 on the tripping device 8 cooperates with the first coupling plate 5 of the switch body to form a conductive circuit, the second coupling plate 7 on the tripping device 8 must protrude, that is, extend out of its box body 9 , so that the installation of the tripping device 8, which can only be installed up and down, is more restricted, which increases the difficulty of installation and affects the installation speed. In the structure of small-sized circuit breakers, this installation defect is more obvious. Moreover, when the tripping module of the tripping device 8 needs to be replaced, the convenience and flexibility of module replacement are also affected.

Contents of the invention

The task of the present invention is to provide a molded case circuit breaker that can improve the installation and replacement efficiency of the tripping device without limiting the function of the electrical isolation seat in the original structure.

The task of the present invention is accomplished in this way, a molded case circuit breaker, which includes: a base 1, the front and rear ends of the base 1 respectively have a switch body seat cavity 27 for setting the switch body and a The tripping device cavity 3 of the tripping device 8 of the box body 9; a cover 6 for placing the cover on the base 1; a set of connecting the base 1 and the cover 6 and electrically isolating the phases of the circuit breaker The electrical isolation seat 4 is characterized in that the set of electrical isolation seats 4 is extended on either one of the box body 9 and the cover 6 of the tripping device 8 .

The electrical isolation seat 4 of the present invention is integrally extended on the front side of the box body 9 .

The electrical isolation seat 4 of the present invention is integrally extended on the front side of the cover 6 .

The electrical isolation seat 4 of the present invention is respectively provided with partition plate grooves 13 on both sides of its base, and correspondingly provided with the partition plate at the front edge of the two inner sides of the box body 9. The box body dividing plate groove 14 corresponding to groove 13, on dividing plate groove 13 and box body dividing plate groove 14, be inserted with the first dividing plate 15, the first dividing plate 15 will each chamber 10 on the box body 9 The front opening of the chamber is closed, and the adjacent chambers 10 are partitioned by a second partition 26 .

The upper and lower ends of the electric isolation seat 4 according to the present invention respectively have a first screw hole 16 and a first circular platform concave cavity 17, and the first screw hole 16 at the upper end and the first circular platform concave cavity 17 are respectively connected with the second screw hole 16 on the cover 6. The screw hole 18 and the mounting hole 12 are corresponding, and the first screw hole 16 at the lower end and the first circular platform concave cavity 17 are respectively connected with the third screw hole 19 on the connecting column seat 11 on the base 1 and the first positioning boss 20. Corresponding.

The upper edge of the rear wall of the box body 9 according to the present invention is provided with an adjusting panel fixing seat 21 , on which the adjusting panel fixing seat 21 is fixed the adjusting panel 22 of the circuit breaker.

The present invention has made above-mentioned improvement, and except the installation mouth that the original upper part is opened in the chamber 3, its rear part has also formed an unobstructed open installation mouth, in each cavity of box body 9 disposes all tripping modules, When forming a complete tripping device 8 and installing it in the cavity 3, it can be installed up and down or front and back. This installation method will not be restricted by the space of the cavity 3, so that the tripping device 8 The installation and replacement are convenient and flexible; at the same time, this structure still ensures that the electrical isolation seat 4 in the original circuit breaker structure acts as a connection between the base 1 and the cover 6 and acts as an electrical isolation between phases of the circuit breaker.

Drawings and Description of Drawings

Fig. 1 is a structural diagram of a molded case circuit breaker in the prior art as exemplified by the present invention.

Fig. 2 is a structural diagram of the molded case circuit breaker of the present invention.

FIG. 3 is a structural view of the electrical isolation seat 4 integrally extended on the front side of the cover 6 according to the present invention.

Detailed ways

Please refer to FIG. 2 , in order to make the drawings show simplicity, the applicant does not install the switch body in the switch body cavity 27 at the rear end of the base 1 and the switch body installed in each chamber 10 of the box body 9 of the present invention. All the trip units are shown, because these structures are the same as those of the prior art, and not showing them will not affect the understanding of the technical solution of the present invention.

Tripping device 8 comprises a box body 9, and this box body 9 is divided into various chambers 10 by the second dividing plate 26 integrally formed on it when it is formed, three chambers 10 are shown schematically in the figure, therefore A group of second partitions 26 only need two pieces, but this is not unique, because this figure is only used as an embodiment thereof, therefore, when the molded case circuit breaker is a four-pole type, the chamber 10 Just corresponding increase becomes four, and one group of second dividing plate 26 just has three pieces. It stands to reason that when there are three cavities 10 in the box body 9 of the tripping device 8 of the three-pole molded case circuit breaker, there should be four second partitions 26, the reason why only two second partitions are actually needed 26, because the other two pieces are made by means of the left and right side walls of box body 9 itself. From this it is not difficult to understand that when the box body 9 had four chambers 10, only three second partitions 26 were needed, because the other two were formed by means of the left and right side walls of the box body 9 itself. . It can be seen that the number of second partitions 26 is one less than the number of chambers 10 . The size of the box body 9 should match the size of the tripping device seat cavity 3 at the front end of the base 1 . In this figure, a group of electrical isolation seats 4 equal in number to the second partition 26 are integrally placed on the front side of the box body 9, that is, the mouth of the box body 9, corresponding to the second partition 26 The front side is connected with the second partition plate 26. The applicant has described the situation that the box body 9 is divided into individual chambers 10 by the second partition 26 , but when the box body 9 is only a whole chamber 10 . Then the second separator 26 may not be stored. In this case, it does not affect the present invention's technical proposal that a group of electrical isolation seats 4 are extended to the front side of the box body 9, that is, the mouth position, because it can be known from the effect of a group of electrical isolation seats 4 that it It is used to connect the base 1 and the cover 6 and to electrically isolate the interphase terminals 2 of the circuit breaker; moreover, the number of electrical isolation seats 4 can still be set without the second partition plate 26 as a reference number. It is determined according to actual needs, such as the length of the box body 9 , the self-strength of the electrical isolation seat 4 , and the appropriate number of fixing ears on the front side of the cover 6 . The electrical isolation seat 4 corresponds to the installation hole 12 at the front end of the cover 6 and the connecting column seat 11 for separating the terminal block 2 at the front end of the base 1 . In this way, the second partition 26 is integrally located in the box cavity of the box body 9 , and the electrical isolation seat 4 extends out of the box cavity of the box body 9 by means of the second partition 26 . After the release unit is installed in each chamber 10 separated by the second partition 26, the corresponding first partition 15 is inserted on the partition groove 13 and the box body partition groove 14, and the cavity The front opening of the chamber 10 is sealed. Once all the assembly is completed, the entire tripping device 8 or tripping mechanism is formed, and then inserted into the tripping device seat cavity 3 of the base 1 by its box body 9, and fixed accordingly. At the same time, the first connecting plate 5 of the switch body on the base 1 is connected with the second connecting plate 7 on the tripping device 8, thereby forming the entire conductive circuit. Since the electrical isolation seat 4 is not arranged on the base 1, that is, it is separated from the base 1, the installation of the tripping device 8 will not be limited by the space of the cavity 3, nor will it be affected by the electrical isolation seat 4. However, the assembly of the tripping device 8 is hindered, which greatly improves the installation speed.

The fixing method of the tripping device 8 is: use a screw to pass through the third screw hole 19 of the connecting column base 11 until it is screwed to the first screw hole 16 at the bottom of the electrical isolation seat 4, and connect the first positioning position on the column base 11. The boss 20 protrudes into the first circular platform concave cavity 17 at the bottom of the electrical isolation seat 4; the adjusting panel 22 is screwed with the adjusting panel fixing seat 21 extending on the box body 9, and is extended on the adjusting panel 22 The second positioning boss 24 on the top corresponds to the first circular platform concave cavity 17 on the upper end of the electrical isolation seat 4, and then the cover 6 is placed on the base 1, and the screw 25 passes through the second screw hole 18 until it reaches the In the first screw hole 16 on the upper end of the electrical isolation socket 4 , the second circular platform concave cavity 23 preset at the bottom of the mounting hole 12 on the cover 6 is seated on the second positioning boss 24 .

Please refer to Fig. 3, which shows that a group of electrical isolation sockets 4 are extended on the cover 6, more specifically, they are integrally extended at the fixed ears on the front side of the cover 6, although the electrical isolation seat 4 The position has been changed, but its whole mechanism of action and assembly process are the same as the aforementioned situation extending on the front side of a group of second dividing plates 26, so the applicant will no longer repeat them. In addition, the applicant has not disclosed the switch body seated in the switch body cavity 27, and the trip unit has not been shown in the chamber 10 of the box body 9 of the trip device 8, because these are not shown. The components are identical to those shown in Figure 2 and are also prior art. Therefore, the applicant uses this figure as an example to show that a group of electrical isolation seats 4 can also be integrally extended on the front side of the cover 6, and can also play a role in connecting the base 1 and the cover 6 and interphase the circuit breaker. Terminal 2 acts as electrical isolation.

Through the description of the above embodiments, the applicant shows that a group of electrical isolation seats 4 can be flexibly extended on any one of the second partition plate 26 and the cover 6 of the box body 9 of the tripping device 8 as required. . When the whole tripping device 8 is to be repaired or replaced, it is only necessary to unscrew the screws contrary to the aforementioned installation process, and pull out the box body 9 from the tripping device seat cavity 3 .

Claims (6)

1. A molded case circuit breaker, comprising: a base (1), the front and rear ends of the base (1) respectively have a switch body seat cavity (27) for setting the switch body and a box body The tripping device chamber (3) of the tripping device (8) of (9); one cover (6) for placing the cover on the base (1); one set for connecting the base (1) and the cover (6) The electrical isolation seat (4) that acts as electrical isolation between the phases of the circuit breaker is characterized in that the set of electrical isolation seats (4) is extended to the box body (9) of the tripping device (8) and Lid (6) is optional on both. 2. The molded case circuit breaker according to claim 1, characterized in that the electrical isolation seat (4) is integrally extended on the front side of the box body (9). 3. The molded case circuit breaker according to claim 1, characterized in that the electrical isolation seat (4) is integrally extended on the front side of the cover (6). 4. The molded case circuit breaker according to any one of claims 1-3, characterized in that the electrical isolation seat (4) is respectively provided with partition grooves (13) on both sides of its base, Correspondingly, a box body partition groove (14) corresponding to the described partition groove (13) is provided at the front edge of the two inner sides of the box body (9). ) and the box body partition groove (14) are inserted with the first partition (15), and the first partition (15) closes the front mouth of each chamber (10) on the box body (9), and Adjacent chambers (10) are partitioned by second partitions (26). 5. The molded case circuit breaker according to any one of claims 1-3, characterized in that the upper and lower ends of the electrical isolation seat (4) respectively have a first screw hole (16), a first round platform Concave (17), the first screw hole (16) of the upper end, the first conical cavity (17) are corresponding with the second screw hole (18) on the lid (6), mounting hole (12) respectively, and the lower end The first screw hole (16), the first circular platform concave cavity (17) are respectively connected with the third screw hole (19) on the connecting column seat (11) on the base (1), the first positioning boss (20) Corresponding. 6. The molded case circuit breaker according to claim 1, characterized in that an adjustment panel fixing seat (21) is extended along the rear wall of the box body (9), and the adjustment panel fixing seat (21) is fixed Adjustment panel (22) of the circuit breaker.

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