Circuit breaker mutual inductor installation structure

Abstract

A circuit breaker mutual inductor installation structure comprises a base plate and is characterized in that the base plate is provided with a mutual inductor installation groove matched with a mutual inductor, a movable bus is arranged in the mutual inductor installation groove, the mutual inductor is provided with a movable bus via hole corresponding to the movable bus, the mutual inductor is fixedly installed in the mutual inductor installation groove, and the movable bus via hole is connected with the movable bus through hole. The movable bus and the movable bus through hole are installed in a sleeved mode. Meanwhile, the fixing structure is simple and reliable, and later maintenance is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and specifically relates to an installation structure for a circuit breaker current transformer. Background Art

[0002] A low-voltage circuit breaker, also known as an automatic switch and commonly called an "air switch", is an electrical appliance that has the functions of a manual switch and can automatically perform undervoltage, overvoltage, overload, and short-circuit protection. It can be used to distribute electric energy, start asynchronous motors infrequently, and protect power supply lines and motors, etc. When they have serious overload, short-circuit, or undervoltage faults, it can automatically cut off the circuit, and its function is equivalent to the combination of a fuse switch and an over / under / thermal relay, etc. Moreover, generally no components need to be changed after breaking the fault current, and it has been widely used. The existing current transformer installation structures of universal circuit breakers are divided into internal and external types. The internal current transformer has a high temperature rise, which is not conducive to the temperature rise of the whole machine. The external current transformer is fixed by screws and pressing plates. There are many external parts, many components and processes, and the cost is high. Summary of the Utility Model

[0003] The purpose of the utility model is to address the defects existing in the current installation of current transformers, and provide an installation structure for a circuit breaker current transformer, which externally arranges the current transformer, and at the same time has a simple and reliable fixing structure, facilitating later maintenance.

[0004] Technical Solution

[0005] To achieve the above technical purpose, the utility model provides an installation structure for a circuit breaker current transformer, which includes a bottom plate. It is characterized in that: a current transformer installation groove matching the current transformer is arranged on the bottom plate, a moving busbar is arranged in the current transformer installation groove, a moving busbar through hole corresponding to the moving busbar is arranged on the current transformer, the current transformer is fixedly installed in the current transformer installation groove, the moving busbar is sleeved and installed with the moving busbar through hole, a connecting protrusion is arranged on the upper end side and / or the lower end side of the current transformer, and the current transformer is fixedly installed in the current transformer installation groove through the connecting protrusion.

[0006] In one embodiment, the current transformer is locked and installed in the current transformer installation groove on the bottom plate by screws.

[0007] In one embodiment, a connecting protrusion one and a connecting protrusion two are respectively arranged on the upper end side and the lower end side of the current transformer for fixing and installing the current transformer in the current transformer installation groove by screws.

[0008] In one embodiment, the transformer is provided with a transformer lead boss, the transformer lead boss is provided with a transformer lead-out notch, and a transformer outlet groove is provided at the bottom of the transformer installation groove corresponding to the transformer lead boss. This structure is convenient for the transformer terminal to be connected with the wiring harness terminal, and the transformer can be installed after the connection to prevent the wiring harness from being pressed.

[0009] In one embodiment, a buffer pad is installed between the mutual inductor and the bottom surface of the mutual inductor installation slot. At the same time, the mutual inductor is kept at a certain distance from the external busbar to avoid abnormal noise from the mutual inductor when a large current is present.

[0010] In one embodiment, when there are at least two poles in the same phase of the circuit breaker, the connection protrusions on the upper end sides of several transformers in the same phase are arranged at different positions to avoid installation errors and prevent mistakes when there are multiple poles in one phase.

[0011] Beneficial Effects

[0012] The utility model provides a circuit breaker transformer installation structure, which comprises a bottom plate, a transformer installation groove matching the transformer is arranged on the bottom plate, a moving bus is arranged in the transformer installation groove, a moving bus through hole corresponding to the moving bus is arranged on the transformer, the transformer is fixedly installed in the transformer installation groove, the moving bus is installed by sleeve fitting with the moving bus through hole, a connecting protrusion is arranged on the upper end side and / or the lower end side of the transformer, the transformer is fixedly installed in the transformer installation groove by the connecting protrusion, and the transformer is externalized, and the fixing structure is simple and reliable, and later maintenance is convenient, and the existence of the foolproof structure avoids the installation error of the transformer in multi-level one-phase. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0014] Attached Figure 1 This is a schematic diagram of the installation position of the mutual inductor in the embodiment of the utility model;

[0015] Attached Figure 2 This is a schematic diagram of the installation completion of the mutual inductor in the embodiment of the utility model;

[0016] Attached Figure 3 This is a schematic diagram of the structure of a mutual inductor in an embodiment of the utility model; DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of rather than all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts shall fall within the scope of protection of this application.

[0018] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for the purpose of illustration and do not represent the only implementation.

[0019] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0020] In this application, unless otherwise clearly defined and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0021] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0022] Embodiment

[0023] In the prior art, the existing current transformer installation structures of universal circuit breakers are divided into internal and external types. The internal current transformer has a high temperature rise, which is not conducive to the temperature rise of the whole machine. The external current transformer is fixed by screws and pressure plates. There are many external parts, many parts and processes, and the cost is high. To solve this problem, as shown in Figure 1 In this embodiment, a current transformer installation structure for a circuit breaker is provided. It includes a bottom plate a, and a current transformer installation groove a01 matching the current transformer b is arranged on the bottom plate a. The moving busbar c is arranged in the current transformer installation groove a01. A moving busbar through hole b01 corresponding to the moving busbar c is arranged on the current transformer b. The current transformer b is fixedly installed in the current transformer installation groove a01, and the moving busbar c is sleeved and installed with the moving busbar through hole b01.

[0024] Connecting protrusions are arranged on the upper end side and / or the lower end side of the current transformer b. The current transformer b is fixedly installed in the current transformer installation groove a01 through the connecting protrusions, avoiding the disadvantages of connecting and installing the current transformer by using a pressure plate in the prior art. As shown in Figure 1 and 2 Specifically, the current transformer b is locked and installed in the current transformer installation groove a01 on the bottom plate a by screws d. Further, a connecting protrusion one b02 and a connecting protrusion two b03 are respectively arranged on the upper end side and the lower end side of the current transformer b for fixing and installing the current transformer b in the current transformer installation groove a01 by screws d.

[0025] To be more detailed, as shown in Figure 3 A current transformer lead boss b04 is arranged on the current transformer b, and a current transformer lead-out wire groove opening b0401 is arranged on the current transformer lead boss b04. A current transformer outgoing wire groove a0101 is arranged at the position corresponding to the current transformer lead boss b04 on the bottom surface of the current transformer installation groove a01.

[0026] A buffer pad e is installed between the current transformer b and the bottom surface of the current transformer installation groove a01 to prevent vibration and abnormal noise when the current transformer passes through a large current. At the same time, when there are at least 2 poles in the same phase of the circuit breaker, the connecting protrusions one b02 on the upper end sides of several current transformers b in the same phase are arranged at different positions to avoid installation errors and play an anti-fooling role. Specifically, as shown in Figure 1 In a universal circuit breaker, each phase includes two current transformers, and the two current transformers are different. To ensure that both types of current transformers can be installed at the same time, the positions of the connecting protrusions one b02 above the current transformers are arranged at different places on the upper end sides of the current transformers. In this way, different current transformers cannot be replaced and installed with each other during installation, playing an anti-fooling role.

[0027] The utility model provides an installation structure for a circuit breaker current transformer, which comprises a bottom plate a. An current transformer installation groove a01 matching the current transformer b is arranged on the bottom plate a. A moving bus bar c is arranged in the current transformer installation groove a01. A moving bus bar through hole b01 corresponding to the moving bus bar c is arranged on the current transformer b. The current transformer b is fixedly installed in the current transformer installation groove a01, and the moving bus bar c is sleeved and installed with the moving bus bar through hole b01. The current transformer is externally placed, and the fixing structure is simple and reliable, which is convenient for later maintenance.

[0028] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0029] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An installation structure for a circuit breaker current transformer, which includes a bottom plate (a), characterized in that : An instrument transformer mounting groove (a01) matching the instrument transformer (b) is provided on the bottom plate (a). The moving busbar (c) is arranged in the instrument transformer mounting groove (a01). A moving busbar through-hole (b01) corresponding to the moving busbar (c) is provided on the instrument transformer (b). The instrument transformer (b) is fixedly installed in the instrument transformer mounting groove (a01). The moving busbar (c) is sleeved and installed with the moving busbar through-hole (b01). Connecting protrusions are provided on the upper end side and / or the lower end side of the instrument transformer (b). The instrument transformer (b) is fixedly installed in the instrument transformer mounting groove (a01) through the connecting protrusions.

2. The installation structure of a circuit breaker current transformer according to claim 1, characterized in that : The instrument transformer (b) is locked in the instrument transformer mounting groove (a01) on the bottom plate (a) by screws (d).

3. The installation structure of a circuit breaker current transformer according to claim 1, characterized in that : Connecting protrusion one (b02) and connecting protrusion two (b03) are respectively provided on the upper end side and the lower end side of the instrument transformer (b) for fixing and installing the instrument transformer (b) in the instrument transformer mounting groove (a01) by screws (d).

4. A circuit breaker current transformer installation structure according to claim 1, characterized in that : An instrument transformer lead boss (b04) is provided on the instrument transformer (b). An instrument transformer lead-out wire groove opening (b0401) is provided on the instrument transformer lead boss (b04). An instrument transformer outgoing wire groove (a0101) is provided at the position corresponding to the instrument transformer lead boss (b04) on the bottom surface of the instrument transformer mounting groove (a01).

5. The installation structure of a circuit breaker mutual inductor according to claim 1, characterized in that : A buffer pad (e) is installed between the instrument transformer (b) and the bottom surface of the instrument transformer mounting groove (a01).

6. The installation structure of a circuit breaker current transformer according to claim 1, characterized in that : When there are at least two poles in the same phase of the circuit breaker, the connecting protrusion one (b02) on the upper end side of several instrument transformers (b) in the same phase is arranged at different positions to avoid installation errors and play a role in preventing misassembly when there are multiple poles in one phase.

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