CN204270844U - High-safety oil-type transformer with fuse protection device - Google Patents

Abstract

The utility model relates to an oil-type transformer, in particular to a high-safety oil-type transformer with a melting core protection device, which includes an oil tank, an iron core inside it, and a high-voltage coil wound outside the iron core. There are high-voltage terminals and low-voltage terminals respectively connected to external high-voltage and low-voltage lines. The high-voltage terminals include three high-voltage terminals corresponding to phase A, phase B, and phase C. The incoming line is electrically connected to the corresponding high-voltage coil through the fuse core. This design product installs a fuse core inside the body of the existing ordinary transformer, and blows the fuse core first when a large current comes, so as to protect the transformer from being burned, thereby improving the safety performance and service life of the transformer.

Description

High-safety oil-type transformer with fuse protection device

technical field

The invention relates to an oil-type transformer, in particular to a high-safety oil-type transformer with a melting core protection device.

Background technique

In the prior art, the oil-type transformer generally directly connects the external high-voltage line to the high-voltage coil through the high-voltage terminal, and mainly relies on the automatic protection device outside the transformer to prevent and reduce the impact of lightning due to the continuous change of power load, which has a certain safety effect. However, the actual use of the existing oil-type transformers shows that the external environment of the transformer is changeable and complex, often due to the failure of the protection device, the lightning directly impacts the transformer over the protection device, and the excessive fluctuation of the power load, etc. , causing the transformer to burn out. The safety performance of the oil-type transformer in the prior art needs to be improved.

Contents of the invention

The purpose of the present invention is to make up for the deficiencies of the prior art, to design a high-safety oil-type transformer with a melting core protection device, to improve the safety performance of the oil-type transformer, and to increase the service life of the oil-type transformer.

Technical scheme of the present invention is as follows:

A high-safety oil-type transformer with a fuse protection device, including an oil tank and an iron core inside it, and a high-voltage coil wound outside the iron core. There are high-voltage terminals and low-voltage terminals connected to external high-voltage and low-voltage lines outside the oil tank, respectively. The high-voltage terminal includes three corresponding high-voltage terminals of phase A, phase B, and phase C. It is characterized in that: one end of the high-voltage terminal located inside the fuel tank is electrically connected to the corresponding incoming line, and the incoming line is electrically connected to the corresponding high-voltage coil through the fuse core. connect.

The melting cores include A-phase melting cores, B-phase melting cores and C-phase melting cores.

One end of the A-phase high-voltage terminal located inside the fuel tank is electrically connected to the corresponding incoming line, and the incoming line is electrically connected to the corresponding high-voltage coil through the A-phase fuse; one end of the B-phase high-voltage terminal located inside the fuel tank is electrically connected to the corresponding incoming line, and the incoming line The phase B fuse is electrically connected to the corresponding high-voltage coil; the phase C high-voltage terminal is electrically connected to the corresponding incoming line at one end inside the fuel tank, and the incoming line is electrically connected to the corresponding high-voltage coil through the C-phase fuse.

The melting core is located inside the fuel tank and indirectly fixed on the upper part of the iron core.

The current at the high-voltage end of the transformer flows through the "three-phase incoming line-fusing core-transformer high-voltage coil" in order to effectively protect the transformer coil from being burned.

The beneficial effects of the present invention are: the designed product installs a fusible core inside the body of the existing common transformer, and burns the fusible core first when a large current comes, so as to protect the transformer from being burned, thereby improving the safety performance of the transformer , and service life.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic view of the side structure of the present invention.

Fig. 3 is a schematic diagram of the installation structure of the key component of the present invention, the melting core.

Fig. 4 is a schematic diagram of the fusible core connection of the key components of the present invention.

Among them: 1. High-voltage terminal; 2. Incoming line; 3. Fused core; 31. A-phase fusible core; 32. B-phase fusible core; 33. C-phase fusible core; 4. High-voltage coil; 5. Positioning frame; 6. Iron core; 7. Fuel tank; 8. Low voltage terminal.

Detailed ways

In order to illustrate the content of the present invention more clearly, a further description will be made below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, a high-safety oil-type transformer with a fuse protection device includes an oil tank 7 and an iron core 6 inside it, as well as a high-voltage coil 4 wound outside the iron core 6 and outside the oil tank 7 There are high-voltage terminals 1 and low-voltage terminals 8 respectively connected to external high-voltage and low-voltage lines. The high-voltage terminal 1 includes three high-voltage terminals 1 corresponding to phase A, phase B, and phase C. The line 2 is electrically connected, and the incoming line 2 is electrically connected to the corresponding high-voltage coil 4 through the fuse 3 .

The melting core 3 includes an A-phase melting core 31 , a B-phase melting core 32 and a C-phase melting core 33 .

One end of the A-phase high-voltage terminal 1 located inside the oil tank 7 is electrically connected to the corresponding incoming line 2, and the incoming line 2 is electrically connected to the corresponding high-voltage coil 4 through the A-phase fuse 31; one end of the B-phase high-voltage terminal 1 located inside the oil tank 7 is electrically connected to the corresponding incoming line. The line 2 is electrically connected, and the incoming line 2 is electrically connected to the corresponding high-voltage coil 4 through the B-phase fuse 32; the end of the C-phase high-voltage terminal 1 located inside the fuel tank 7 is electrically connected to the corresponding incoming line 2, and the incoming line 2 passes through the C-phase fuse 33 It is electrically connected with the corresponding high voltage coil 4.

The melting core 3 is located inside the fuel tank 7 and is indirectly fixed on the upper part of the iron core 6 .

In actual use, if the high current causes the fuse core to burn out, you only need to replace the burnt transformer fuse core without causing the high-voltage coil or even the corresponding low-voltage coil to burn out, thereby improving the safety of the transformer and prolonging the life of the transformer.

The above-mentioned embodiments should not be regarded as limiting the protection scope of the present invention. Those skilled in the art can make changes or improvements based on the technical solutions or means of the present invention, such as using other protectors and fuses with overcurrent protection functions to replace Melting should fall within the protection scope of the claims of the present invention.

Claims (4)

1. be with the high security oil formula transformer of fusible core protective device, comprise fuel tank (7) and be positioned at the iron core (6) of its inside, and be wrapped in the outside high-tension coil (4) of iron core (6), there is connection respectively outside high in fuel tank (7) outer setting, the HV Terminal (1) of low-voltage circuit and low-voltage terminal (8), HV Terminal (1) comprises corresponding A phase, B phase, C phase three HV Terminal (1), it is characterized in that: one end that described HV Terminal (1) is positioned at fuel tank (7) inner is electrically connected with corresponding inlet wire (2), inlet wire (2) is electrically connected with corresponding high-tension coil (4) by fusible core (3).

2. the high security oil formula transformer of band fusible core protective device according to claim 1, is characterized in that: described fusible core (3) comprises A phase fusible core (31), B phase fusible core (32) and C phase fusible core (33).

3. the high security oil formula transformer of band fusible core protective device according to claim 1, it is characterized in that: one end that described A phase HV Terminal (1) is positioned at fuel tank (7) inner is electrically connected with corresponding inlet wire (2), and inlet wire (2) is electrically connected with corresponding high-tension coil (4) by A phase fusible core (31); One end that B phase HV Terminal (1) is positioned at fuel tank (7) inner is electrically connected with corresponding inlet wire (2), and inlet wire (2) is electrically connected with corresponding high-tension coil (4) by B phase fusible core (32); One end that C phase HV Terminal (1) is positioned at fuel tank (7) inner is electrically connected with corresponding inlet wire (2), and inlet wire (2) is electrically connected with corresponding high-tension coil (4) by C phase fusible core (33).

4. the high security oil formula transformer of band fusible core protective device according to claim 1, is characterized in that: it is inner that described fusible core (3) is positioned at fuel tank (7), is indirectly fixed on iron core (6) top.