CN210403480U

CN210403480U - Combined transformer

Info

Publication number: CN210403480U
Application number: CN201921527330.0U
Authority: CN
Inventors: 许凯旋; 翟丽珍; 梁庆宁; 杨剑波; 周俊明; 周登灵; 李楚泳; 张美景; 梁健俊; 王靖龙; 谢勇; 黄振兴; 方炯炀
Original assignee: Haihong Electric Co Ltd
Current assignee: Haihong Electric Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-04-24
Anticipated expiration: 2029-09-12

Abstract

The utility model discloses a combined transformer, which comprises a dry-type transformer, a low-voltage chamber and a high-voltage chamber which are arranged and combined in a shape like a Chinese character 'pin'; the dry-type transformer is respectively connected with the low-voltage chamber and the high-voltage chamber through leads; a low-pressure auxiliary device is arranged in the low-pressure chamber; the inside of high-pressure chamber is full of transformer oil and is provided with the overcurrent protection component of soaking in transformer oil, and overcurrent protection component includes load switch, plug-in fuse and reserve fuse. The combined structure of the dry-type transformer, the oil-immersed high-pressure chamber and the low-pressure chamber is adopted to replace the traditional oil-immersed combined transformer, and the transformer oil is not filled in the transformer, so that the damage of the transformer caused by faults in the operation process is reduced, the application range of the transformer is expanded, and the transformer requirement of a load dense area is met.

Description

Combined transformer

Technical Field

The utility model relates to a transformer field, especially a modular transformer.

Background

A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction. At present, an oil-immersed transformer is commonly adopted, but once the oil-immersed transformer encounters a fault inside or outside the oil-immersed transformer in the operation process, burning, explosion and oil injection accidents are easily caused. Meanwhile, due to the flammable and explosive characteristics of the transformer oil, the damage degree of accidents is serious and the rescue difficulty is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a modular transformer, adopt dry-type transformer and the integrated configuration of oily formula hyperbaric chamber, low-pressure chamber to replace traditional oily formula combined transformer.

The utility model provides a technical scheme that its problem adopted is:

a combined transformer comprises a dry-type transformer, a low-voltage chamber and a high-voltage chamber which are arranged and combined in a shape like a Chinese character 'pin'; the dry-type transformer is respectively connected with the low-voltage chamber and the high-voltage chamber through leads; a low-pressure auxiliary device is arranged in the low-pressure chamber; the transformer oil is filled in the high-pressure chamber, the overcurrent protection element soaked in the transformer oil is arranged in the high-pressure chamber, and the overcurrent protection element comprises a load switch, a plug-in fuse and a backup fuse.

Further, a first terminal is arranged at the top of the high-pressure chamber, and a second terminal and a third terminal are arranged on the front surface of the high-pressure chamber.

Further, the dry-type transformer is connected to the first terminal through the lead wire; the first terminal is connected with one end of the backup fuse, and the other end of the backup fuse is connected with one end of the plug-in fuse; the other end of the plug-in fuse is connected to the load switch, and the load switch is connected to the second terminal and the third terminal, respectively.

Further, the low voltage auxiliary equipment comprises a UPS power supply, a temperature sensor and a circuit breaker.

Further, still be provided with thermometer, oil level gaugember, manometer and alarm in the hyperbaric chamber, the thermometer, the oil level gaugember with the manometer respectively with the alarm is connected.

The combined transformer at least has the following beneficial effects: the combined structure of the dry-type transformer, the oil-immersed high-pressure chamber and the low-pressure chamber is adopted to replace the traditional oil-immersed combined transformer, and the transformer oil is not filled in the transformer, so that the damage of the transformer caused by faults in the operation process is reduced, the application range of the transformer is expanded, and the transformer requirement of a load dense area is met.

Drawings

The invention is further described with reference to the following figures and examples.

Fig. 1 is a structural diagram of a combined transformer according to an embodiment of the present invention;

fig. 2 is a structural diagram of a high voltage chamber of a combined transformer according to an embodiment of the present invention;

fig. 3 is an electrical schematic diagram of a high-voltage chamber of a combined transformer according to an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, in one embodiment of the present invention, a combined transformer is provided, which includes a dry type transformer 100, a low voltage chamber 300, and a high voltage chamber 200 arranged and combined in a delta-shaped manner; the dry type transformer 100 is connected to the low voltage chamber 300 and the high voltage chamber 200 through lead wires, respectively; a low-pressure auxiliary device is arranged in the low-pressure chamber 300; the inside of the high pressure chamber 200 is filled with transformer oil and is provided with overcurrent protection elements soaked in the transformer oil, the overcurrent protection elements including a load switch 210, a plug-in fuse 220, and a backup fuse 230.

In this embodiment, specifically, the dry-type transformer 100 is located above, the low voltage chamber 300 and the high voltage chamber 200 are located below the dry-type transformer 100, and the dry-type transformer 100 is connected to the low voltage chamber 300 and the high voltage chamber 200 through lead wires to form a delta arrangement combination, so that the functional area of the combined transformer is more reasonably planned. The sleeve is arranged outside the lead to protect the lead. The high-voltage chamber 200 is filled with transformer oil, so that the insulating property is improved, the insulating distance is reduced, the whole volume of the combined transformer is reduced, and the structure is compact. The load switch 210 is specifically an oil-immersed load switch, and replaces a high-voltage circuit breaker to realize the function of switching a transformer.

The combined structure of the dry-type transformer 100, the oil-immersed high-voltage chamber 200 and the low-voltage chamber 300 is adopted to replace the traditional oil-immersed combined transformer, and the transformer oil is not filled in the transformer any more, so that the damage of the transformer caused by faults in the operation process is reduced, the application range of the transformer is expanded, and the transformer requirement of a load dense area is met.

Referring to fig. 2 and 3, in another embodiment, a first terminal 241 is provided at the top of the high pressure chamber 200, and a second terminal 242 and a third terminal 243 are provided at the front surface of the high pressure chamber 200. Further, the dry type transformer 100 is connected to the first terminal 241 by a lead; the first terminal 241 is connected to one end of the backup fuse 230, and the other end of the backup fuse 230 is connected to one end of the plug-in fuse 220; the other end of the plug-in fuse 220 is connected to a load switch 210, and the load switch 210 is connected to a second terminal 242 and a third terminal 243, respectively. The second terminal 242 is connected to a power supply line, and the third terminal 243 is connected to a looped network outlet line. The omnibearing overcurrent protection of the combined transformer is realized through the double-layer protection of the plug-in fuse 220 and the backup fuse 230. In addition, the load switch 210 has an arc extinguishing device, and can cut off a rated load current and a constant overcurrent. Specifically, the X-phase winding, the Y-phase winding, and the Z-phase winding of the dry-type transformer 100 are respectively connected to three different first terminals 241 of the high-voltage chamber 200 by lead wires, and the backup fuse 230, the plug-in fuse 220, and the load switch 210 are sequentially connected to each of the three different first terminals 241.

Referring to fig. 1, further, the low voltage auxiliary equipment includes a UPS power source 310 and a circuit breaker 320. The inlet end of the low-voltage chamber 300 is connected with the UPS 310, the back of the UPS 310 is connected with one end of the breaker 320, and the other end of the breaker 320 is connected with the outlet end of the low-voltage chamber 300. The temperature sensor 330 is disposed on an inner wall of the low pressure chamber 300 for monitoring the temperature of the low pressure chamber 300.

Referring to fig. 2, in another embodiment, a temperature gauge 251, an oil level gauge 253, a pressure gauge 252 and an alarm are further disposed in the high pressure chamber 200, and the temperature gauge 251, the oil level gauge 253 and the pressure gauge 252 are respectively connected to the alarm. The temperature gauge 251 is used for monitoring the temperature in the high-pressure chamber 200, the oil level gauge 253 is used for monitoring the oil level of transformer oil in the high-pressure chamber 200, the pressure gauge 252 is used for monitoring the air pressure in the high-temperature chamber, and the alarm controller is arranged in the alarm and receives signals sent by the temperature gauge 251, the oil level gauge 253 and the pressure gauge 252 and generates an alarm signal once the values of the temperature, the oil level or the air pressure are not in a normal range.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and the technical effects of the present invention can be achieved by the same means, which all belong to the protection scope of the present invention.

Claims

1. A combined transformer is characterized by comprising a dry-type transformer, a low-voltage chamber and a high-voltage chamber which are arranged and combined in a delta shape; the dry-type transformer is respectively connected with the low-voltage chamber and the high-voltage chamber through leads; a low-pressure auxiliary device is arranged in the low-pressure chamber; the transformer oil is filled in the high-pressure chamber, the overcurrent protection element soaked in the transformer oil is arranged in the high-pressure chamber, and the overcurrent protection element comprises a load switch, a plug-in fuse and a backup fuse.

2. The modular transformer of claim 1, wherein the top of the high voltage chamber is provided with a first terminal, and the front of the high voltage chamber is provided with a second terminal and a third terminal.

3. The combined transformer of claim 2, wherein the dry-type transformer is connected to the first terminal through the lead wire; the first terminal is connected with one end of the backup fuse, and the other end of the backup fuse is connected with one end of the plug-in fuse; the other end of the plug-in fuse is connected to the load switch, and the load switch is connected to the second terminal and the third terminal, respectively.

4. The modular transformer of claim 3, wherein the low voltage auxiliary devices comprise a UPS power source, a temperature sensor, and a circuit breaker.

5. A combined transformer according to claim 3 or 4, characterized in that a temperature gauge, an oil level gauge, a pressure gauge and an alarm are further arranged in the high-pressure chamber, and the temperature gauge, the oil level gauge and the pressure gauge are respectively connected with the alarm.