CN206003620U - A kind of contact box current transformer - Google Patents

Abstract

A contact box type current transformer, which includes: a transformer body with an inner cavity; a conductor embedded in the inner cavity of the transformer body in a ring shape; a transformer coil, and a ring-shaped conductor passing through the transformer coil ; the contact box, the contact box is arranged at the rear end of the side wall of the transformer body; the incoming line terminal is arranged on the conductor and extends out of the side wall of the transformer body to connect with the contact box at the rear end; and the primary outlet terminal, It is drawn from the conductor and partially exposed at the bottom of the transformer body, and the static contact of the grounding switch is installed on the primary outlet terminal. The utility model integrates the contact box, the grounding switch and the current transformer, so that the devices in the switch cabinet are more compact, the occupied space is reduced, and it is beneficial to the miniaturization of the switch cabinet.

Description

A contact box type current transformer

technical field

The utility model relates to the technical field of high-voltage electrical equipment, in particular to an integrated current transformer with a contact box and a grounding switch contact.

Background technique

The contact box in the switchgear is usually only used as the installation and insulation protection part of the static contact. It includes an inner cavity, and the insulating matrix at the bottom of the inner cavity is embedded with a conductor that runs through the front and rear. The front and rear ends of the conductor are exposed, respectively. contacts and conductor bars. An independent current transformer is usually installed in the switchgear, and the current transformer is generally installed at the lower opening of the circuit breaker, which occupies a large space and brings difficulties to the miniaturization of the switchgear.

With the continuous development of my country's switchgear industry, the requirements for the miniaturization, modularization, functionalization and convenient installation of the switchgear are gradually increased. Therefore, the switchgear industry particularly needs a current collector transformer, grounding switch, contact A modular integrated product that integrates components such as boxes.

Utility model content

Therefore, the technical problem to be solved by the utility model is to overcome the defects of many components, complex structure, cumbersome maintenance and installation, high cost and large volume in the prior art, so as to provide a current collector transformer, grounding switch, contact box Integral contact box current transformer.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a contact box type current transformer, which includes: a transformer body with an inner cavity; a conductor, which passes through the iron core and is embedded in the transformer body In the inner cavity; the transformer coil passes through the other side of the iron core and is embedded in the inner cavity of the transformer body; it is characterized in that: it also includes

A contact box, the contact box is arranged at the rear end of the side wall of the transformer body;

The incoming line terminal is arranged on the conductor and protrudes from the side wall of the transformer body to connect with the contact box at the rear end;

And a primary outgoing line terminal, which is led out from the conductor and partially exposed at the bottom of the transformer body, and a grounding switch static contact is installed on the primary outgoing line terminal.

Further, one side of the conductor passes through the iron core.

Further, the contact box is provided with a static contact arm installed on the incoming line terminal.

Further, the primary outlet terminal is a flat plate with screw holes, and the primary outlet terminal is fixed by screws and a cable lap bar integrally provided with the static contact of the grounding switch.

Further, the contact box and the transformer body are poured together with epoxy resin.

The technical scheme of the utility model has the following advantages: the contact box and the transformer are set as an integrated structure, which effectively reduces the use space of the switchgear, and at the same time connects the primary outlet end directly with the grounding switch, reducing the connection part of the copper bar And material costs, integrated product settings to ensure more convenient installation and maintenance.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the structural representation of the contact box type current transformer of the present utility model;

Explanation of reference signs:

1-contact box; 2-static contact arm; 3-transformer body; 4-iron core; 5-coil; 6-conductor; 7-primary outlet terminal; 8-grounding switch static contact;

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

Example 1

As shown in Figure 1, the contact box type current transformer includes a transformer body 3 and a contact box 1, and the contact box 1 and the transformer body 3 are casted together with epoxy resin. Wherein the inner cavity of the transformer body 3 is provided with a current transformer, and the current transformer includes an iron core 4, a transformer coil 5 and a conductor 6, wherein the rectangular conductor 6 passes through the transformer core 4; the contact box 1 is arranged on the The rear end of the right side wall of the transformer body 3, and at the same time, an incoming line terminal is provided on the right short side of the conductor 6, and the incoming line terminal extends out of the right side wall of the transformer body 3 and the contact box 1 at the rear end. The static contact arm 2 is connected, and the static contact arm 2 is installed on the incoming line terminal through screws. The lower end of the rectangular conductor 5 is provided with a primary outlet terminal 7 partially exposed at the bottom of the transformer body 3, and the grounding switch static contact 8 is integrated with the cable lap row, wherein the primary outlet terminal 7 is a flat plate with a screw hole. Therefore, the static contact of the grounding switch is installed and fixed on the primary outlet terminal 7 by screws, and the integration of the grounding switch, the current transformer and the contact box is realized.

The utility model integrates the contact box, the grounding switch and the current transformer, which makes the devices in the switch cabinet more compact, reduces the occupied space, is beneficial to the miniaturization of the switch cabinet, and also reduces the cost of the switch cabinet components, and can be widely used It is used in the switchgear of the power system.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (5)

1. a kind of contact box current transformer, it includes：

Transformer body (3) with inner chamber；

Conductor (6), it is embedded in the inner chamber of described transformer body (3) through iron core (4)；

Mutual inductor coil (5) is embedded in the inner chamber of described transformer body (3) through iron core (4) opposite side；

It is characterized in that：Also include

Contact box (1), described contact box (1) is arranged on the side wall rear end of described transformer body (3)；

Input terminal, it is arranged on described conductor (6) above and stretches out the described side wall of described transformer body (3) and the institute of rear end State contact box to connect；

And an outlet terminal (7), it is drawn from described conductor (6) and locally exposes to the bottom of described transformer body (3) End, a described outlet terminal (7) is provided with static contact of grounding switch (8).

2. contact box current transformer according to claim 1 it is characterised in that：The a line of described conductor (6) is worn Cross described iron core (4).

3. contact box current transformer according to claim 1 it is characterised in that：It is provided with peace in described contact box (1) It is loaded on the stationary contact arm (2) of described input terminal.

4. contact box current transformer according to claim 1 it is characterised in that：A described outlet terminal (7) is With the flat board of screw, a described outlet terminal (7) adopts screw and the electricity being wholely set with described static contact of grounding switch (8) Cable overlap joint row fix.

5. contact box current transformer according to claim 1 it is characterised in that：Described contact box (1) and transformer Body (3) adopts poured with epoxy resin together.