Molded case circuit breaker

Abstract

The utility model relates to a molded case circuit breaker, which comprises an upper cover, a secondary control module and a carrier wave module, a placement cavity is formed on the upper cover, the secondary control module and the carrier wave module are arranged in the placement cavity, and the secondary control module and the carrier wave module are arranged front and back. The secondary control module and the carrier module are connected with a circuit board in the molded case circuit breaker through an extension socket, the carrier module is electrically connected with the secondary control module, and the secondary control module is connected with a mutual inductor open circuit prevention circuit. According to the utility model, the secondary control module and the circuit breaker body can realize primary and secondary separation and are convenient to replace; after the secondary module is removed, relative shell and inter-phase insulation tests can be carried out, and the problems of opening a surface cover and removing a power line of the secondary control module in the prior art are solved; 2.54 extension socket connection is adopted, the connection is firm and reliable, and damage is not easy to occur.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of moulded case circuit breaker, especially to moulded case circuit breaker. BACKGROUND

[0002] Moulded case circuit breaker is also called device type circuit breaker, all parts are sealed in plastic shell, and many such as auxiliary contact, under voltage release and auxiliary release are modularized, moulded case circuit breaker is basically overhauled due to very compact structure, and it is manually operated, and electrically operated opening and closing can be selected for large capacity.

[0003] The existing moulded case circuit breaker needs to be equipped with secondary control module to achieve the purpose of remote control and realize internet of things function, but when the moulded case circuit breaker is tested for phase-to-phase insulation, the face cover needs to be opened, and the secondary control module power supply line needs to be removed for testing, so that the operation is troublesome. SUMMARY

[0004] The utility model discloses a moulded case circuit breaker to solve the above technical problem.

[0005] In order to achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of moulded case circuit breaker, including upper cover, secondary control module and carrier module, the upper cover is formed with the accommodation cavity, the secondary control module and carrier module are set in the accommodation cavity, the secondary control module and carrier module are arranged in front and back, the secondary control module and the carrier module are connected with the circuit board in moulded case circuit breaker by row plug, the carrier module is electrically connected with the secondary control module, wherein secondary control module is connected with mutual inductor anti open circuit.

[0007] The utility model further sets up, the accommodation cavity is provided with transparent cover, for encapsulating secondary control module and carrier module in the accommodation cavity.

[0008] The utility model further sets up, one end of transparent cover is formed with hinged post on both sides, corresponding the upper cover is formed with hinged hole, the hinged post is located in hinged hole to realize the rotation opening of transparent cover, another end of transparent cover is provided with screw hole for realizing the locking connection with upper cover.

[0009] The utility model further sets up, the row plug includes first row plug and second row plug connected with carrier module and third row plug connected with secondary control module.

[0010] The utility model further sets up, the secondary control module is connected with mutual inductor anti open circuit through the adapter jack, the mutual inductor anti open circuit is zero sequence current transformer anti open circuit and / or measurement mutual inductor anti open circuit and / or protection mutual inductor anti open circuit.

[0011] The utility model further sets up, the zero sequence current transformer anti open circuit includes adapter jack J4, rectifier diode D3, rectifier diode D4, rectifier diode D7, rectifier diode D8, the adapter jack J4 has connecting pin 1, connecting pin 2, connecting pin 3, the connecting pin one connection rectifier diode D4 and rectifier diode D3, rectifier diode D4 connects rectifier diode D8 after connecting connecting pin 3, rectifier diode D3 connects rectifier diode D7 after connecting connecting pin 3.

[0012] The utility model further sets up, the protection mutual inductor anti open circuit includes adapter jack J3 and 3 transient suppression diodes, 3 the transient suppression diodes are located on three-phase loop respectively, wherein transient suppression diode includes diode D1, diode D5 and diode D9, the both ends of diode D1 are connected with adapter jack J3's 1 foot and 2 feet, the both ends of diode D5 are connected with adapter jack J3's 3 foot and 4 feet, diode D9 is connected with adapter jack J3's 5 foot and 6 feet.

[0013] The utility model further sets up, the measurement mutual inductor anti open circuit includes adapter jack J2 and 3 transient suppression diodes, 3 the transient suppression diodes are located on three-phase loop respectively, and transient suppression diode includes diode D2, diode D6 and diode D10, the both ends of diode D2 are connected with adapter jack J2's 1 foot and 2 feet, the both ends of diode D6 are connected with adapter jack J2's 3 foot and 4 feet, diode D10 is connected with adapter jack J2's 5 foot and 6 feet.

[0014] The utility model discloses a beneficial effect: secondary control module and circuit breaker body can realize secondary separation, and the replacement is convenient, after the secondary module is removed, can carry out relative shell, and the interphase insulation test solves the traditional opening face cover, removes the difficult problem of secondary control module power cord, adopts 2.54 row plug connection entirely, and the connection is firm, reliable, and not easy to damage. Secondly, the SMBJ6.0CA transient suppression diode of series connection is connected on each phase loop on the circuit of measuring mutual inductor, and the open circuit current generated in the plug-in moment is suppressed, thereby the function of preventing open circuit is reached, to avoid the open circuit discharge phenomenon generated in the process of live plug-in of controller module. The SMBJ30CA transient suppression diode of series connection is connected on each phase loop on the circuit of protecting mutual inductor, and the open circuit current generated in the plug-in moment is suppressed, thereby the function of preventing open circuit is reached, to avoid the open circuit discharge phenomenon generated in the process of live plug-in of controller module. The A7 rectifier diode of series connection is connected on the loop on the circuit of zero sequence current mutual inductor, and the open circuit current generated in the plug-in moment is suppressed, thereby the function of preventing open circuit is reached, to avoid the open circuit discharge phenomenon generated in the process of live plug-in of controller module. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation to the present application. In the drawings:

[0016] Figure 1 It is the structural schematic diagram of the utility model.

[0017] Figure 2 It is the structural schematic diagram of the utility model's removal middle cover.

[0018] Figure 3 It is the structural schematic diagram of the utility model's transparent cover.

[0019] Figure 4 It is the schematic diagram of the controller of the utility model.

[0020] Figure 5 It is the circuit diagram of zero sequence current mutual inductor of the utility model embodiment.

[0021] Figure 6 It is the circuit diagram of protecting current mutual inductor of the utility model embodiment.

[0022] Figure 7 It is the circuit diagram of measuring current mutual inductor of the utility model embodiment.

[0023] Reference signs:

[0024] 10, upper cover; 101, accommodation cavity; 102, hinged hole; 20, secondary control module; 30, carrier module; 40, row plug; 50, transparent cover; 501, hinged column; 502, threaded hole; DETAILED DESCRIPTION

[0025] The implementation of the application will be described in detail below with the help of the accompanying drawings and examples, so that the realization process of how the application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented.

[0026] As Figures 1-3 shown, the utility model is a kind of moulded case circuit breaker, including upper cover 10, secondary control module 20 and carrier module 30, the upper cover 10 is formed with accommodation cavity 101, the secondary control module 20 and carrier module 30 are arranged in the accommodation cavity 101, the secondary control module 20 and carrier module 30 are arranged in front and back, the secondary control module 20 and the carrier module 30 are connected with the circuit board in moulded case circuit breaker by row plug 40, the carrier module 30 is electrically connected with the secondary control module 20, wherein secondary control module is connected with mutual inductor anti-opening circuit.

[0027] The accommodation cavity 101 is provided with transparent cover 50, for encapsulating secondary control module 20 and carrier module 30 in the accommodation cavity 101.

[0028] One end of the transparent cover 50 is formed with hinged column 501 on both sides, corresponding the upper cover 10 is formed with hinged hole 102, the hinged column 501 is located in hinged hole 102 to realize the rotation opening of transparent cover 50, another end of the transparent cover 50 is provided with threaded hole 502 for realizing the locking connection with upper cover 10.

[0029] The utility model further provides, the row plug 40 includes the first row plug 40 and second row plug 40 connected with carrier module 30 and the third row plug 40 connected with secondary control module 20.

[0030] As Figures 4-7 shown, secondary control module is connected with mutual inductor anti-opening circuit through adapter jack, the mutual inductor anti-opening circuit is zero sequence current transformer anti-opening circuit and / or measurement transformer anti-opening circuit and / or protection transformer anti-opening circuit.

[0031] Reference Figure 5The zero sequence current transformer open circuit prevention circuit comprises a switching jack J4, a rectifier diode D3, a rectifier diode D4, a rectifier diode D7 and a rectifier diode D8, the switching jack J4 has a connecting pin 1, a connecting pin 2 and a connecting pin 3, the connecting pin 1 is connected with the rectifier diode D4 and the rectifier diode D3, the rectifier diode D4 is connected with the rectifier diode D8 and then connected with the connecting pin 3, and the rectifier diode D3 is connected with the rectifier diode D7 and then connected with the connecting pin 3.

[0032] With reference to Figure 6 The protection transformer open circuit prevention circuit comprises a switching jack J3 and three transient suppression diodes, the three transient suppression diodes are respectively arranged on three-phase circuits, wherein the transient suppression diodes comprise a diode D1, a diode D5 and a diode D9, two ends of the diode D1 are connected with a 1 pin and a 2 pin of the switching jack J3, two ends of the diode D5 are connected with a 3 pin and a 4 pin of the switching jack J3, and the diode D9 is connected with a 5 pin and a 6 pin of the switching jack J3.

[0033] With reference to Figure 7 The measurement transformer open circuit prevention circuit comprises a switching jack J2 and three transient suppression diodes, the three transient suppression diodes are respectively arranged on three-phase circuits, and the transient suppression diodes comprise a diode D2, a diode D6 and a diode D10, two ends of the diode D2 are connected with a 1 pin and a 2 pin of the switching jack J2, two ends of the diode D6 are connected with a 3 pin and a 4 pin of the switching jack J2, and the diode D10 is connected with a 5 pin and a 6 pin of the switching jack J2.

[0034] The secondary control module 20 can be separated from the circuit breaker body, and is convenient to replace; after the secondary control module 20 is removed, the relative shell and the interphase insulation test can be carried out, and the problem that the power line of the secondary control module 20 is removed by opening the face cover is solved; all are connected by 2.54 row plugs 40, and the connection is firm, reliable and not easy to damage. Secondly, a SMBJ6.0CA transient suppression diode is connected in series on each phase circuit of the measurement transformer, so that the open circuit current generated in the plugging moment is suppressed, the open circuit prevention function is achieved, and the open circuit discharge phenomenon generated in the process of plugging the controller module under the electrified state is avoided. A SMBJ30CA transient suppression diode is connected in series on each phase circuit of the protection transformer, so that the open circuit current generated in the plugging moment is suppressed, the open circuit prevention function is achieved, and the open circuit discharge phenomenon generated in the process of plugging the controller module under the electrified state is avoided. A A7 rectifier diode is connected in series on each phase circuit of the zero sequence current transformer, so that the open circuit current generated in the plugging moment is suppressed, the open circuit prevention function is achieved, and the open circuit discharge phenomenon generated in the process of plugging the controller module under the electrified state is avoided.

[0035] As used in the specification and claims, some terms can have special meanings. Those of skill in the art will understand that one or more devices have been referred to by multiple names in the specification. The specification and claims should not be controlled by differences in nomenclature, but rather by the functional differences between the components. As used throughout the specification and claims, "comprising" is to be interpreted as an open term meaning "including, but not limited to," and the like. "Approximately" means within an acceptable error range for the numbers used in the technical field and by those of ordinary skill in the art, which permits some leeway for variation and / or error in a given technical field.

[0036] It is to be understood that the terms "including", "comprising", "consisting" and "consisting essentially of" or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, has, includes, or consists of any feature recited herein is not limited to the exclusion of any other features unless specifically recited. An element proceeded by "comprises... a", "has... a", "includes... a", or "consisting essentially of" does not, without further recitation, preclude the existence of additional elements or

[0037] The above description illustrates and describes the only preferred embodiments of the present application. However, it is to be understood that the application is not limited to the above-described and illustrated embodiments, and that modifications and variations are possible without departing from the spirit and scope of the application as defined by the appended claims. Changes and modifications within the scope of the application can be made by those of ordinary skill in the art, and it is intended to include all such changes and modifications within the scope of the application.

Claims

1. A molded case circuit breaker characterized by, The application relates to a plastic shell circuit breaker, which comprises an upper cover, a secondary control module and a carrier module, a setting cavity is formed on the upper cover, the secondary control module and the carrier module are arranged in the setting cavity, the secondary control module and the carrier module are arranged in front of and behind each other, the secondary control module and the carrier module are connected with a line board in the plastic shell circuit breaker through a row of plugs, the carrier module is electrically connected with the secondary control module, a mutual inductor anti-opening circuit is connected with the secondary control module, the mutual inductor anti-opening circuit is a zero sequence current mutual inductor anti-opening circuit and / or a measurement mutual inductor anti-opening circuit and / or a protection mutual inductor anti-opening circuit, the zero sequence current mutual inductor anti-opening circuit comprises a switching jack J4, rectifier diodes D3, D4, D7 and D8, the switching jack J4 has a connecting pin 1, a connecting pin 2 and a connecting pin 3, the connecting pin 1 is connected with the rectifier diodes D4 and D3, the rectifier diode D4 is connected with the rectifier diode D8 and then connected with the connecting pin 3, and the rectifier diode D3 is connected with the rectifier diode D7 and then connected with the connecting pin 3.

2. A molded case circuit breaker according to claim 1, wherein A transparent cover is arranged on the setting cavity and used for packaging the secondary control module and the carrier module in the setting cavity.

3. A molded case circuit breaker according to claim 2 wherein, Hinge columns are formed on both sides of one end of the transparent cover, corresponding hinge holes are formed in the upper cover, the hinge columns are located in the hinge holes to realize rotation opening of the transparent cover, and a screw hole is arranged at the other end of the transparent cover and used for realizing locking connection with the upper cover.

4. The plastic shell circuit breaker of claim 1, wherein the row of plugs comprises a first row of plugs connected with the carrier module, a second row of plugs connected with the carrier module, and a third row of plugs connected with the secondary control module.

5. The molded case circuit breaker of claim 1, wherein, The secondary control module is connected with the mutual inductor anti-opening circuit through the switching jack.

6. A molded case circuit breaker according to claim 5 wherein, The protection mutual inductor anti-opening circuit comprises a switching jack J3 and three transient suppression diodes, the three transient suppression diodes are respectively located on three-phase circuits, the transient suppression diodes comprise diodes D1, D5 and D9, two ends of the diode D1 are connected with a 1-pin and a 2-pin of the switching jack J3, two ends of the diode D5 are connected with a 3-pin and a 4-pin of the switching jack J3, and the diode D9 is connected with a 5-pin and a 6-pin of the switching jack J3.

7. A molded case circuit breaker according to claim 5 wherein, The measurement mutual inductor anti-opening circuit comprises a switching jack J2 and three transient suppression diodes, the three transient suppression diodes are respectively located on three-phase circuits, the transient suppression diodes comprise diodes D2, D6 and D10, two ends of the diode D2 are connected with a 1-pin and a 2-pin of the switching jack J2, two ends of the diode D6 are connected with a 3-pin and a 4-pin of the switching jack J2, and the diode D10 is connected with a 5-pin and a 6-pin of the switching jack J2.

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