Multi-structure low-voltage single-phase current transformer

Abstract

The utility model discloses a kind of multi-structure low-voltage single-phase current transformer, including the current transformer body consisting of closed housing and built-in mutual inductance component, the window shape of the current transformer body is compatible with the cross-sectional shape of cable or copper bar, the cable or copper bar passes through the window and is installed on the current transformer body, and the top surface of the current transformer body is equipped with the foolproof wiring port and screw wiring port connected with mutual inductance component.This utility model is a kind of multi-structure compatible double-wiring selectable integrated low-voltage single-phase current transformer, cable / copper bar one-key switching installation and screw / foolproof terminal can be selected wiring can be realized, while the utility model structure is simple, low in cost, improve wiring efficiency and operation safety, solve the existing low-voltage single-phase CT installation compatibility, secondary wiring no selection, screw wiring loose problem.

Description

Technical Field

[0001] This utility model relates to a low-voltage system current transformer, and more particularly to a multi-structure low-voltage single-phase current transformer. Background Technology

[0002] The current defects in the wiring of low-voltage current transformers (CTs) restrict their installation and maintenance efficiency. The existing wiring method uses screw fixing, which requires inserting the code tube and clamping the wire before tightening the screw. During the wiring process, it is easy to press the wire end, causing poor contact. Moreover, in field maintenance, a diagram is required to connect the wires correctly, which is time-consuming and labor-intensive. Utility Model Content

[0003] The purpose of this utility model is to provide a multi-structure low-voltage single-phase current transformer that is simple in structure, low in cost, improves wiring efficiency, ensures wiring quality, and is easy to maintain.

[0004] The purpose of this utility model is achieved through the following technical measures: a multi-structure low-voltage single-phase current transformer, comprising a current transformer body composed of a sealed shell and a built-in current transformer component, characterized in that the window shape of the current transformer body is adapted to the cross-sectional shape of a cable or copper busbar, the cable or copper busbar passes through the window and is installed on the current transformer body, and a foolproof wiring port and a screw wiring port connected to the current transformer component are provided on the top surface of the current transformer body.

[0005] This utility model is an integrated low-voltage single-phase current transformer with multiple structural compatibility and optional dual wiring. It can realize one-button switching installation of cable / copper busbar and select wiring of screw / foolproof terminal as needed. At the same time, this utility model has a simple structure, low cost, and improves wiring efficiency and operation and maintenance safety. It solves the problems of poor installation compatibility, no secondary wiring selection, and easy loosening of screw wiring in existing low-voltage single-phase CTs.

[0006] The current transformer body of this utility model is a flat rectangular body. A rectangular box-shaped protective cover is installed on the top surface of the current transformer body to cover the foolproof wiring port and the screw wiring port. A notch-shaped wire hole is provided on the side wall of the protective cover near the foolproof wiring port and the screw wiring port for the foolproof wiring and the screw wiring to pass through. A positioning connection structure is provided between the protective cover and the current transformer body.

[0007] The present invention provides a single foolproof wiring port located at one end of the top surface of the current transformer body, and a pair of screw wiring ports located at opposite ends of the top surface of the current transformer body. The positioning connection structure includes a positioning convex frame and a connector. The positioning convex frame is located in the middle of the top surface of the current transformer body and has a connecting hole. The protective cover has a groove in the middle and a connecting hole in the middle of the groove. The bottom surface of the groove presses against the top surface of the positioning convex frame, and the front and rear sidewalls of the protective cover are respectively in close contact with the front and rear sidewalls of the positioning convex frame. The connector passes through the two connecting holes to install the protective cover on the current transformer body.

[0008] There is a gap between the bottom edge of the protective cover and the top surface of the current transformer body described in this utility model.

[0009] The present invention provides a fixing hole at the bottom of the housing for fixing the current transformer to other components.

[0010] Compared with the prior art, the present invention has the following significant advantages:

[0011] (1) This utility model addresses the pain points of screw wiring in the secondary wiring of existing current transformers, such as low efficiency, easy error, easy loosening, and difficult maintenance. It adopts an integrated design scheme that is compatible with cable, copper busbar and other installation methods. The secondary wiring method can be fixed with screws or customized anti-foolproof terminals. The use of anti-foolproof terminals can effectively avoid polarity / circuit misconnection and improve wiring efficiency and safety.

[0012] (2) This utility model has a simple structure, low cost, and strong practicality. It enables faster and more efficient connection between the current transformer and external components, optimizes the process routing, and improves production efficiency to a certain extent. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] In the diagram: 1-Current transformer body, 2-Window, 3-Foolproof wiring port, 4-Screw wiring port, 5-Protective cover, 6-Wire hole, 7-Positioning protrusion, 8-Connection hole, 9-Groove, 10-Outer shell, 11-Fixing hole. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the embodiments and accompanying drawings to help those skilled in the art better understand the inventive concept of the present invention. However, the scope of protection of the claims of the present invention is not limited to the following embodiments. For those skilled in the art, all other embodiments obtained without creative effort without departing from the inventive concept of the present invention are within the scope of protection of the present invention.

[0017] like Figure 1 As shown, this utility model discloses a multi-structure low-voltage single-phase current transformer, including a current transformer body 1 composed of a sealed housing 10 and a built-in current transformer component. The shape of the window 2 of the current transformer body 1 is adapted to the cross-sectional shape of the cable or copper busbar. The cable or copper busbar passes through the window 2 and is installed on the current transformer body 1. Furthermore, the top surface of the current transformer body 1 is provided with a foolproof wiring port 3 and a screw wiring port 4 for connection with the current transformer component.

[0018] In this embodiment, the current transformer body 1 is a flat rectangular body. A rectangular box-shaped protective cover 5 is installed on the top surface of the current transformer body 1 to cover the foolproof wiring port 3 and the screw wiring port 4. On the side wall of the protective cover 5, near the foolproof wiring port 3 and the screw wiring port 4, there are notch-shaped wire holes 6 for the foolproof wiring and screw wiring to pass through. A positioning connection structure is provided between the protective cover 5 and the current transformer body 1. The positioning connection structure is used to connect the protective cover 5 and the current transformer body 1, and to position the protective cover 5 on the top surface of the current transformer body 1.

[0019] In this embodiment, the foolproof wiring port 3 is a single port located at one end of the top surface of the current transformer body 1, and the screw wiring ports 4 are a pair located at opposite ends of the top surface of the current transformer body 1. The positioning connection structure includes a positioning protrusion 7 and a connector. The positioning protrusion 7 is located in the middle of the top surface of the current transformer body 1 and has a connecting hole 8. The protective cover 5 has a groove 9 in the middle, and a connecting hole 8 is located in the middle of the groove 9. The bottom surface of the groove 9 presses against the top surface of the positioning protrusion 7, and the front and rear sidewalls of the protective cover 5 are respectively tightly attached to the front and rear sidewalls of the positioning protrusion 7. The connector passes through the two connecting holes 8 to install the protective cover 5 on the current transformer body 1. There is a gap between the bottom edge of the protective cover 5 and the top surface of the current transformer body 1, which can increase the height of the positioning protrusion 7 to increase the gap and facilitate the pre-wiring.

[0020] In order to fix this utility model to other components, a fixing hole 11 is provided at the bottom of the outer casing 10.

[0021] The embodiments of this utility model are not limited to this. Based on the above content of this utility model, and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, the positioning and connection structure of this utility model may have other embodiments. Therefore, this utility model can also be modified, replaced or changed in various other forms, all of which fall within the scope of protection of this utility model.

Claims

1. A multi-structure low-voltage single-phase current transformer, comprising a current transformer body consisting of a sealed housing and built-in transformer components, characterized in that: The window shape of the current transformer body is adapted to the cross-sectional shape of the cable or copper busbar. The cable or copper busbar passes through the window and is installed on the current transformer body. The top surface of the current transformer body is provided with a foolproof wiring port and a screw wiring port for connection with the current transformer assembly.

2. The multi-structure low-voltage single-phase current transformer according to claim 1, characterized in that: The current transformer body is a flat rectangular body. A rectangular box-shaped protective cover is installed on the top surface of the current transformer body to cover the foolproof wiring port and the screw wiring port. On the side wall of the protective cover, near the foolproof wiring port and the screw wiring port, there is a notch-shaped wire hole for the foolproof wiring and the screw wiring to pass through. A positioning connection structure is provided between the protective cover and the current transformer body.

3. The multi-structure low-voltage single-phase current transformer according to claim 2, characterized in that: The foolproof wiring port is a single port located at one end of the top surface of the current transformer body. The screw wiring ports are a pair, located at opposite ends of the top surface of the current transformer body. The positioning connection structure includes a positioning convex frame and a connector. The positioning convex frame is located in the middle of the top surface of the current transformer body and has a connecting hole. The protective cover has a groove in the middle and a connecting hole in the middle of the groove. The bottom surface of the groove presses against the top surface of the positioning convex frame, and the front and rear sidewalls of the protective cover are respectively in close contact with the front and rear sidewalls of the positioning convex frame. The connector passes through the two connecting holes to install the protective cover on the current transformer body.

4. The multi-structure low-voltage single-phase current transformer according to claim 3, characterized in that: There is a gap between the bottom edge of the protective cover and the top surface of the current transformer body.

5. The multi-structure low-voltage single-phase current transformer according to claim 4, characterized in that: The bottom of the housing is provided with mounting holes for fixing the current transformer to other components.

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