CN203490259U - A current transformer dedicated to a metering box - Google Patents

Abstract

The utility model provides a current transformer dedicated to a metering box. The current transformer comprises a current transformer body and two primary leading wire terminals disposed on the end portion of the current transformer body, and is characterized in that the structure of each primary leading wire terminal is in an inwardly-recessed cylindrical shape, and that primary terminal shields are arranged on the current transformer body and on the outer sides of the primary leading wire terminals. The current transformer may decrease the volume and the weight of the metering box and the labor intensity and operation time of workers, and has simple and reliable structure.

Description

A kind of batch meter current mutual inductor special

Technical field

The utility model relates to the current transformer that conduct metering that electric system used, measurement, monitoring, control etc. are used, and relates in particular to a kind of batch meter current mutual inductor special, belongs to electrical equipment technical field.

Background technology

At present; the problem that batch meter in high-voltage operation is mainly considered is the insulation against ground distance of high-pressure side; therefore for Insulation Problems; that conventionally the casing of batch meter can be done is very large; therefore both weight increases, and has increased again manufacturing cost, particularly when doing insulation processing, takes a lot of work, takes material; and safe reliability is poor, brought potential safety hazard to the batch meter operation in electric system.

The patent No. is 200920180724.3 utility model patent < < high-pressure prepay measuring box > >, a kind of high-pressure prepay measuring box is disclosed, include casing, control box, high-voltage vacuum circuit breaker controller is installed in control box, casing is separately provided with mounting bracket outward, comprise the high-pressure vacuum breaker being fixed on mounting bracket, current transformer, voltage transformer (VT) and lightning arrester, the upper end of described high-pressure vacuum breaker is all provided with static contact, the extension line terminal of described static contact and high-pressure vacuum breaker interconnects, one side of described vacuum circuit breaker is provided with tool rest, on described tool rest, be rotatablely equipped with cutter shape moving contact, on each tool rest, be all connected to copper bar, two copper bars are respectively through two current transformers, while also connects two voltage transformer (VT), on described current transformer and the connection terminal of voltage transformer (VT), be connected with respectively lightning arrester, solve existing low-voltage electric energy metering case power-steeling preventing effect not good enough, and there is no the technical matterss such as prepayment metering function.Yet this high-pressure prepay measuring box does not solve the excessive overweight problem of box volume.

In view of this, be necessary to provide a kind of batch meter current mutual inductor special, to address the above problem.

Summary of the invention

The purpose of this utility model is: the technical matters existing for solving known technology, a kind of batch meter current mutual inductor special is provided, can reduces the volume of batch meter, alleviate the weight of batch meter, alleviated again labour intensity and the time of workman when operation simultaneously, and simple and reliable for structure.

The technical scheme that the utility model adopts is: a kind of batch meter current mutual inductor special, comprise current transformer body and two outlet terminals that are positioned at current transformer body end, it is characterized in that, the structure of an outlet terminal is the cylindrical shape of indent, and the outside of an outlet terminal increases terminal guard shield one time on current transformer body.

Batch meter current mutual inductor special as above, is characterized in that, the structure of a described terminal guard shield is cylindrical shape.

The beneficial effects of the utility model are: can reduce the volume of batch meter, alleviate the weight of batch meter, alleviate again labour intensity and the time of workman when operation simultaneously, and simple and reliable for structure.

Accompanying drawing explanation

Fig. 1 is the current transformer structure schematic diagram of prior art.

Fig. 2 is batch meter current mutual inductor special structural representation of the present utility model.

Embodiment

In order to understand better the utility model, below in conjunction with embodiment, further illustrate content of the present utility model, but content of the present utility model is not only confined to the following examples.Those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values are equally within the listed claims limited range of the application.

Symbol description in accompanying drawing: 1, current transformer body; 2, an outlet terminal; 3, a terminal guard shield.

Fig. 1 is the current transformer structure schematic diagram of prior art, its outlet terminal 2 is square, when high-voltage operation, need to consider the insulation against ground distance problem of an outlet terminal 2, therefore adopt the high pressure measurement box body of this structure larger, weight increases, particularly insulation processing is difficult, need to repeatedly do insulation processing at outlet terminal 2 places, the slightly careless problem that there will be insulation breakdown, in the product that wherein produce every month, having 20% left and right is insulation breakdown problem, occur needing the making of again doing over again after insulation breakdown, therefore when processing insulation against ground, take a lot of work, take material, and safe reliability is poor, for operation power brings potential safety hazard.

Fig. 2 is improvement structure of the present utility model, it is characterized in that, changes the structure of an outlet terminal 2 by the square cylindrical shape that changes into, then increases terminal guard shield 3 one time; Like this, both reduce the weight of an outlet terminal 2, approximately alleviated 15% left and right; Solved again the Insulation Problems that outlet terminal 2 high pressure discharge over the ground, by such improvement, insulation breakdown problem greatly reduces, and product percent of pass has been brought up to more than 95%.Therefore in producing installation, only an outlet of batch meter need to be drawn by an outlet terminal 2, then with insulating gel embedding; Therefore the volume of batch meter can reduce greatly, has equally also alleviated weight and the manufacturing cost of batch meter, has alleviated again workman labour intensity and time when operation.

These are only embodiment of the present utility model, be not limited to the utility model, therefore, all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model.

Claims (2)

1. a batch meter current mutual inductor special, comprise current transformer body (1) and be positioned at two outlet terminals (2) of current transformer body (1) end, it is characterized in that, the cylindrical shape that the structure of an outlet terminal (2) is indent, and the outside of an outlet terminal (2) is at the upper terminal guard shield (3) that increases of current transformer body (1).

2. batch meter current mutual inductor special according to claim 1, is characterized in that, the structure of a described terminal guard shield (3) is cylindrical shape.