CN214476921U

CN214476921U - Voltage transformer with circuit protection function

Info

Publication number: CN214476921U
Application number: CN202120700754.3U
Authority: CN
Inventors: 刘陈文; 孙丽敏
Original assignee: Zhejiang Luoke Electric Power Technology Co ltd
Current assignee: Zhejiang Luoke Electric Power Technology Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-10-22
Anticipated expiration: 2031-04-07

Abstract

The utility model discloses a voltage transformer with circuit protection function, which comprises a protection shell, wherein the top of the protection shell is connected with an external circuit electric pole through a circuit protector, the center of the protection shell is provided with an inner ring, the bottom of the inner ring is provided with an inflation valve, two instrument binding posts are arranged below the inner ring, the bottom of the protection shell is provided with an installation base, four sides of the installation base are respectively provided with a fixing bolt, a C-shaped iron core is arranged inside the protection shell, insulating gas is filled between the C-shaped iron core and the protection shell, a second winding is arranged below the C-shaped iron core, the voltage transformer with circuit protection function can be actively fused when the current of an external circuit is too large, thereby playing a role of protecting the external instrument circuit, after being fused, can be replaced by simple plugging and unplugging, and has simple operation and convenient use.

Description

Voltage transformer with circuit protection function

Technical Field

The utility model relates to a voltage transformer field specifically is a voltage transformer with circuit protection function.

Background

Voltage transformers are instruments for transforming voltages, similar to transformers. However, the purpose of transforming voltage by the transformer is to conveniently transmit electric energy, so that the capacity is very large, and usually kilovolt-ampere or mega volt-ampere is taken as a calculation unit; the voltage transformer is mainly used for supplying power to a measuring instrument and a relay protection device, measuring the voltage, power and electric energy of a line, or protecting valuable equipment, a motor and a transformer in the line when the line fails, so that the capacity of the voltage transformer is small, generally only a few volt-amperes and dozens of volt-amperes, and the maximum voltage of the voltage transformer does not exceed one thousand volt-amperes.

The voltage transformer has wide application range, is often visible in various electrical equipment, has more and more perfect functions along with the development and the progress of science and technology, and still has the problems that the voltage transformer has poor circuit protection effect and is troublesome to maintain and replace.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a voltage transformer with circuit protection function to current voltage transformer maintains the comparatively trouble problem of change to circuit protection not enough, voltage transformer in the existing market that proposes in solving above-mentioned background art.

The technical scheme of the utility model is realized like this: a voltage transformer with a circuit protection function comprises a protection shell, wherein the top of the protection shell is connected with an external circuit power connection column through a circuit protector, an inner ring is arranged at the center of the protection shell, an inflation valve is installed at the bottom of the inner ring, two instrument binding posts are arranged below the inner ring, an installation base is installed at the bottom of the protection shell, fixing bolts are respectively arranged on four sides of the installation base, a C-shaped iron core is installed inside the protection shell, insulating gas is filled between the C-shaped iron core and the protection shell, a second winding is installed below the C-shaped iron core, a first winding is installed above the C-shaped iron core and connected with an external positioner inside the circuit protector, and the external positioner is connected with a plug-in connector through a fuse wire, and the inner wall of the circuit protector is provided with a flame-retardant inner shell.

Preferably, the protection shell is fixedly connected with the mounting base, and the mounting base is screwed with the fixing bolt.

Preferably, the inflation valve is communicated with the insulating gas, and the inflation valve is a one-way gas valve.

Preferably, the first winding is electrically connected with the external positioner, the external positioner is electrically connected with the fuse wire, and the fuse wire is electrically connected with the plug-in connector.

Preferably, the plug-in connector is connected with the external circuit electric pole in a plug-in manner.

Preferably, the flame-retardant inner shell is fixedly connected with the circuit protector.

Preferably, the meter terminal is electrically connected to the second winding.

By adopting the technical scheme, the beneficial effects of the utility model are that:

this kind of voltage transformer with circuit protection function can be when external circuit current is too big, and initiative fusing to play the effect to external instrument circuit protection, after the fusing, can change easy operation, convenient to use through simple pulling out and inserting.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a front view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a partial cross-sectional view of fig. 1.

Wherein: 1. a protective housing; 2. an inner ring; 3. an inflation valve; 4. installing a base; 5. fixing the bolt; 6. a meter wiring terminal; 7. a circuit protector; 8. an external line connecting post; 9. a C-shaped iron core; 10. an insulating gas; 11. a second winding; 12. a first winding; 13. a flame retardant inner housing; 14. connecting a positioner; 15. a pluggable connector; 16. and fusing the wires.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, a voltage transformer with circuit protection function comprises a protection casing 1, the top of the protection casing 1 is connected with an external circuit connection post 8 through a circuit protector 7, the center of the protection casing 1 is provided with an inner ring 2, the bottom of the inner ring 2 is provided with an inflation valve 3, two instrument binding posts 6 are arranged below the inner ring 2, the bottom of the protection casing 1 is provided with an installation base 4, four sides of the installation base 4 are respectively provided with a fixing bolt 5, the protection casing 1 is internally provided with a C-shaped iron core 9, an insulating gas 10 is filled between the C-shaped iron core 9 and the protection casing 1, the lower of the C-shaped iron core 9 is provided with a second winding 11, the upper of the C-shaped iron core 9 is provided with a first winding 12, the first winding 12 is connected with an external positioner 14 inside the circuit protector 7, the external positioner 14 is connected with a plug-in connector 15 through a fuse wire 16, the inner wall of the circuit protector 7 is provided with a flame-retardant inner shell 13.

Specifically, protection casing 1 and installation base 4 fixed connection, installation base 4 and fixing bolt 5 are twisted and are connect, set up like this and can be through installation base 4 and fixing bolt 5 with this device fixed mounting in required position, guarantee this device stability at the operation in-process.

Specifically, the inflation valve 3 is communicated with the insulating gas 10, the inflation valve 3 is a one-way air valve, the insulating gas 10 is conveniently injected into the protective shell 1 through the inflation valve 3, and the insulating gas 10 is used for providing gap filling insulation for the device.

Specifically, the first winding 12 is electrically connected with the external locator 14, the external locator 14 is electrically connected with the fusible link 16, and the fusible link 16 is electrically connected with the plug-in connector 15, so that the external high-voltage power line can be connected to the first winding 12 through the first winding 12, and the power can be connected to the first winding 12 through the external locator 14, the fusible link 16 and the plug-in connector 15.

Specifically, the plug-in connector 15 is connected with the external circuit power connection pole 8 in a plug-in mode, so that the fuse wire 16 is convenient to replace, and convenience in operation is improved.

Specifically, fire-retardant interior casing 13 and circuit protector 7 fixed connection set up like this and can avoid the heat that produces when fusible link 16 fuses to ignite circuit protector 7 and protection casing 1 through fire-retardant interior casing 13 to play the effect of protection to circuit protector 7.

Specifically, the meter terminal 6 is electrically connected to the second winding 11, so that an electrical component for detecting voltage and current can be added to the second winding 11 through the meter terminal 6.

The working principle is as follows: the device is connected with a high-voltage circuit through an external circuit power connection pole 8, and is used for detecting voltage, an electric element of current is connected into an instrument wiring terminal 6, after the connected high-voltage circuit is subjected to mutual inductance and transformation through a first winding 12 and a second winding 11, the voltage is input into the instrument wiring terminal 6 through the second winding 11, the electric element of the current is detected, when the current connected into the external circuit power connection pole 8 is overlarge, a fuse wire 16 is automatically fused, a circuit protector 7 and a protection shell 1 are ignited by heat generated when the fuse wire 16 is fused by an inflaming retarding inner shell body 13, the circuit protector 7 is protected, after the fuse wire 16 is fused, the external circuit power connection pole 8 is pulled down from the circuit protector 7, and a new fuse wire 16 is replaced.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A voltage transformer with circuit protection function, comprising: the protection device comprises a protection shell (1), wherein the top of the protection shell (1) is connected with an external circuit power connection column (8) through a circuit protector (7), an inner ring (2) is arranged at the center of the protection shell (1), an inflation valve (3) is installed at the bottom of the inner ring (2), two instrument binding posts (6) are arranged below the inner ring (2), an installation base (4) is installed at the bottom of the protection shell (1), fixing bolts (5) are respectively arranged on four sides of the installation base (4), a C-shaped iron core (9) is installed inside the protection shell (1), insulating gas (10) is filled between the C-shaped iron core (9) and the protection shell (1), a second winding (11) is installed below the C-shaped iron core (9), a first winding (12) is installed above the C-shaped iron core (9), the circuit protector is characterized in that the first winding (12) is connected with an external positioner (14) inside the circuit protector (7), the external positioner (14) is connected with a plug-in connector (15) through a fuse wire (16), and an inner flame-retardant shell (13) is arranged on the inner wall of the circuit protector (7).

2. The voltage transformer with circuit protection function according to claim 1, characterized in that: the protection shell (1) is fixedly connected with the mounting base (4), and the mounting base (4) is screwed with the fixing bolt (5).

3. The voltage transformer with circuit protection function according to claim 1, characterized in that: the inflation valve (3) is communicated with the insulating gas (10), and the inflation valve (3) is a one-way gas valve.

4. The voltage transformer with circuit protection function according to claim 1, characterized in that: the first winding (12) is electrically connected with the external positioner (14), the external positioner (14) is electrically connected with the fuse wire (16), and the fuse wire (16) is electrically connected with the plug-in connector (15).

5. The voltage transformer with circuit protection function according to claim 1, characterized in that: the plug-in connector (15) is connected with the external circuit electric pole (8) in a plug-in manner.

6. The voltage transformer with circuit protection function according to claim 1, characterized in that: the flame-retardant inner shell (13) is fixedly connected with the circuit protector (7).

7. The voltage transformer with circuit protection function according to claim 1, characterized in that: the meter terminal (6) is electrically connected with the second winding (11).