CN207690599U - Straight-through current transformer suspension fixed structure - Google Patents

Abstract

The utility model discloses a suspension fixing structure of a through-type current transformer, which is used for fixing and installing the through-type current transformer on a busbar, and comprises a fixing bracket passing through a through-hole of the through-type current transformer and a The insulating sleeve nested on the busbar. The middle part of the fixed bracket is provided with a buckle groove that is fastened with the front part of the through-type current transformer. The upper and lower parts of the fixed bracket are passed through the through-type current transformer. The core hole is pierced and provided with a fixed threaded hole. The internal thread of the fixed threaded hole is connected with a pressing screw, and the pressing screw is threaded with the threaded hole to press against the direction of the busbar, and is tightened with the insulating sleeve. fixed. The utility model allows the through-core current transformer to be reliably and firmly suspended on the busbar without relying on the base for fixing.

Description

Suspension and fixed structure of feedthrough current transformer

technical field

The utility model relates to the technical field of electric power engineering, in particular to an installation structure of a through-core current transformer.

Background technique

As a common electrical device, the feedthrough current transformer has been widely used due to its advantages of easy installation and reliable operation without a primary winding.

The feed-through current transformer is generally installed on the busbar, and the base is fixed on the baffle of the power distribution screen. However, due to the various designs of on-site power distribution cabinets, it is often difficult to fix the through-type transformers, especially the butterfly current transformers originally installed by the special change users (which are connected in series with the busbars during installation) , The installation of the feed-through transformer was not considered in the design of this distribution cabinet, which caused the problem that the base of the feed-through transformer was difficult to fix.

Utility model content

The technical problem to be solved by the utility model is to provide a suspended and fixed structure of the through-type current transformer to solve the problem of difficult installation of the through-type current transformer.

In order to solve the above technical problems, the utility model adopts the following technical scheme: the suspension and fixed structure of the through-type current transformer is used to fix the through-type current transformer on the busbar, including Holes pass through the fixing bracket and the insulating sleeve nested on the busbar. The middle part of the fixing bracket is provided with a buckle groove that is fastened with the front part of the feed-through current transformer. The upper and lower parts of the fixing bracket are from The core-through hole of the core-through current transformer is provided with a fixed threaded hole. The internal thread of the fixed threaded hole is connected with a pressing screw, and the pressing screw is screwed with the threaded hole to press against the direction of the busbar. And fasten it with the insulating sleeve.

Preferably, a high temperature resistant novolak epoxy resin plate gasket is provided between the insulating sleeve and the top pressing screw.

Preferably, the upper and lower parts of the fixing bracket are provided with three fixing screw holes along the horizontal direction.

Preferably, the fixing bracket is made of pressed stainless steel plate.

Preferably, the buckle groove is C-shaped, and the upper and lower parts of the fixing bracket are obliquely connected to the upper and lower ends of the buckle groove.

The technical scheme adopted by the utility model adopts suspension type fixing, and does not need to be fixed by the bottom plate. Generally, the installation of the busbar is firm and reliable, and it is used as a force supporting point. Firmly fix on the busbar, and place the busbar at the center of the feed-through current transformer. In this way, the feedthrough current transformer can be reliably and firmly suspended on the busbar without relying on the base to fix it. Moreover, the fixed bracket adopts a ladder structure without forming a closed loop and will not affect the measurement of the feed-through current transformer.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Fig. 1 is the structural representation of the utility model.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. The following description of at least one exemplary embodiment is merely illustrative in nature, and in no way serves as any limitation of the invention and its application or use. 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.

When fixing the through-hole transformer, it is generally necessary to connect and fix the base of the transformer with the baffle of the power distribution screen. However, due to the space conditions of the power distribution screen site, this method may not be able to be fixed. The purpose of this utility model is to fix the through-type transformer firmly on the busbar without the need for a power distribution screen baffle, and to solve the problem of difficult installation of the through-type transformer. First of all, it cannot affect the transformer The measurement accuracy of the transformer must comply with the technical specifications of the transformer and cannot affect the safe operation of the power grid; secondly, it is easy to install and operate during use, which greatly improves the work efficiency of the installers.

As shown in Figure 1, the suspension and fixed structure of the feed-through current transformer is used to fix the feed-through current transformer 1 on the busbar 2, including the fixing hole 11 passing through the feed-through current transformer. The bracket 4 and the insulating sleeve 3 nested on the busbar 2, the middle part of the fixed bracket 4 is provided with a buckle groove that is fastened with the front part of the feed-through current transformer 1, and the upper and lower parts of the fixed bracket 4 Pass through the through-hole 11 of the through-core current transformer and be provided with a fixed threaded hole, the internal thread of the fixed threaded hole is connected with a top pressure screw 5, and the top pressure screw 5 is screwed to the female by threading the threaded hole. Row 2 is pressed against in the direction, and is tightly fixed with insulating sleeve 3 .

In order not to affect the measurement, the busbar 2 needs to be insulated from the fixed bracket 4, so as to avoid the operation accident due to the failure of the insulation properties of the transformer shell. On the one hand, the busbar 2 is wrapped and insulated with the insulating sleeve 3 at the installation position of the transformer On the other hand, a high temperature resistant novolak epoxy resin plate gasket 6 is added between the insulating sleeve 3 and the top pressure screw 5 to achieve double insulation protection.

Wherein, the fixing bracket 4 is formed by pressing a stainless steel plate. The buckle groove is C-shaped, designed according to the external dimensions of the through-hole current transformer, and can fasten the transformer outward with tension. The upper part and the lower part of the fixing bracket are vertical plates, and are obliquely connected with the upper end and the lower end of the buckle groove.

The upper and lower parts of the fixing bracket 4 are provided with three fixing threaded holes along the horizontal direction. According to the width of the busbar, select the fixed threaded hole for fixing, so as to adapt to the different widths of the busbar.

When installing, screw the top pressure screws on the upper and lower parts of the fixing bracket into the fixing threaded holes at the same time, and the top pressure screws will be squeezed in the direction of the busbar to receive force, and at the same time, use the tension of the fixing bracket to the outside to firmly fix the through-type current transformer. The feed-through current transformer will not slide down due to gravity, so the feed-through current transformer is suspended and fixed on the busbar.

The fixed bracket is firm and reliable after installation. After the installation was completed, a pressure test was carried out. A 5Kg weight was placed on the upper end of the feed-through current transformer. The test lasted for 1 minute, and the feed-through current transformer did not fall off.

The utility model changes the traditional installation method of the core-through transformer, solves the problem of partial installation difficulties in the installation process, does not rely on the power distribution panel, and is beautiful on site after installation, and is firm and reliable, ensuring the reliable operation of the transformer.

The installation method of the utility model is simple, and the working efficiency is greatly improved. There is no need to drill holes on the bottom plate of the power distribution screen or adjust the position of the bottom plate of the power distribution screen due to insufficient space. Each installation (generally 3 pieces) can save more than 20 minutes of time, greatly improving the work efficiency of the staff and solving problems. General difficult problems in daily work.

In addition to the above-mentioned preferred embodiment, the utility model also has other embodiments, and those skilled in the art can make various changes and deformations according to the utility model, as long as they do not depart from the spirit of the utility model, all should belong to the claims of the utility model The range defined in .

Claims (5)

1. straight-through current transformer suspension fixed structure, for straight-through current transformer to be fixedly mounted on busbar, It is characterized in that：The insulation sleeve for including the fixing bracket passed through from straight-through current transformer center hole and being nested on busbar Pipe, the support bracket fastened middle part are equipped with the catching groove fastened with straight-through current transformer front, the support bracket fastened top It is pierced by from straight-through current transformer center hole with lower part and is equipped with fixing screwed hole, the fixing screwed hole internal thread is connected with Top pressure screw rod, the top pressure screw rod to busbar direction top pressure, and with insulating sleeve with threaded hole threaded engagement by holding out against fixation.

2. straight-through current transformer suspension fixed structure according to claim 1, it is characterised in that：The insulating sleeve Heat safe novolac epoxy resin plate gasket is equipped between top pressure screw rod.

3. straight-through current transformer suspension fixed structure according to claim 1, it is characterised in that：The fixing bracket Upper and lower part set in the horizontal direction there are three fixing screwed hole.

4. the straight-through current transformer suspension fixed structure according to claims 1 to 3 any one, it is characterised in that： The fixing bracket is suppressed using stainless steel plate.

5. straight-through current transformer suspension fixed structure according to claim 4, it is characterised in that：The catching groove is in C Type, the top and bottom ramp interface of the support bracket fastened upper and lower part and catching groove.