阅读说明：本技术 电流互感器的安装装置、测量装置以及变压器系统 (Current transformer mounting device, current transformer measuring device and transformer system ) 是由 王其珏 吴先威 张亚旭 解静 徐雄 朱德虎 闫娟 方立 于 2021-07-21 设计创作，主要内容包括：本发明涉及电流互感器的安装装置、测量装置以及变压器系统。一种电流互感器的安装装置包括：绝缘筒,电流互感器套设在绝缘筒的外壁上；以及绝缘件,包括第一绝缘板和第二绝缘板,每个第一绝缘板和第二绝缘板包括：绝缘板开孔,其中,每个第一绝缘板和第二绝缘板通过各自的绝缘板开孔套设在绝缘筒的外壁上；面对电流互感器的绝缘板内表面；背对电流互感器的绝缘板外表面；以及凹槽,至少包括设置在绝缘板内表面上并与绝缘板开孔同心的第一环形凹槽和第二环形凹槽,第一环形凹槽和第二环形凹槽的每个中分别设置有相应的金属环。通过设置绝缘筒和金属环,可以避免电流互感器被强烈的电磁场击穿,使变压器的维护更加安全。(The invention relates to a current transformer mounting device, a current transformer measuring device and a transformer system. A mounting apparatus of a current transformer includes: the current transformer is sleeved on the outer wall of the insulating cylinder; and an insulating member including a first insulating plate and a second insulating plate, each of the first insulating plate and the second insulating plate including: the insulation cylinder is provided with a plurality of insulation plates, wherein each first insulation plate and each second insulation plate are sleeved on the outer wall of the insulation cylinder through the respective insulation plate openings; an inner surface of the insulating plate facing the current transformer; the outer surface of the insulating plate is back to the current transformer; and the grooves at least comprise a first annular groove and a second annular groove which are arranged on the inner surface of the insulating plate and are concentric with the opening of the insulating plate, and each of the first annular groove and the second annular groove is respectively provided with a corresponding metal ring. Through the arrangement of the insulating cylinder and the metal ring, the current transformer can be prevented from being broken down by a strong electromagnetic field, and the transformer is safer to maintain.)

1. A mounting apparatus for a current transformer, comprising:

the current transformer (105) is sleeved on the outer wall of the insulating cylinder (201); and

an insulating member (203) including a first insulating plate (2031) and a second insulating plate (2032), the first insulating plate (2031) and the second insulating plate (2032) being opposed to each other with the current transformer (105) interposed therebetween, each of the first insulating plate (2031) and the second insulating plate (2032) including:

an insulation plate opening (O), wherein each of the first insulation plate (2031) and the second insulation plate (2032) is sleeved on the outer wall of the insulation cylinder through the respective insulation plate opening (O);

an inner surface of the insulating plate facing the current transformer (105);

an insulating plate outer surface facing away from the current transformer (105), wherein the insulating cylinder (201) does not extend beyond the insulating plate outer surface in a lengthwise direction; and

and the grooves at least comprise a first annular groove and a second annular groove which are arranged on the inner surface of the insulating plate and are concentric with the opening (O) of the insulating plate, and each of the first annular groove and the second annular groove is provided with a corresponding metal ring, wherein the inner diameter of the first annular groove is the same as that of the current transformer (105), and the outer diameter of the second annular groove is the same as that of the current transformer (105).

2. The current transformer mounting apparatus according to claim 1, further comprising:

a first angle ring (301), the first angle ring (301) being disposed on the insulating plate outer surface of the first insulating plate (2031), the first angle ring (301) comprising:

a first plane portion (3011) contacting the insulating plate outer surface of the first insulating plate (2031);

a first corner ring opening (3012) with an edge aligned with an inner wall of the insulating cylinder (201); and

a first cylindrical portion (3013) extending from the first angle ring opening (3012) into the insulation cylinder (201) along the inner wall of the insulation cylinder (201),

a second corner ring (302) disposed on the insulation plate outer surface of the second insulation plate (2032) opposite the first corner ring (301), the second corner ring (302) comprising:

a second plane part (3021) contacting the insulating plate outer surface of the second insulating plate (2032);

a second corner ring opening (3022) having an edge aligned with an inner wall of the insulation barrel (201); and

a second cylindrical portion (3023) extending from the second corner ring opening (3022) into the insulation barrel (201) along the inner wall of the insulation barrel (201).

3. The current transformer mounting apparatus according to claim 2, further comprising:

a first fixing plate (502) provided on the first corner ring (301) and having a first opening through which a lead wire detected by the current transformer (105) passes;

a second fixing plate (503) provided on the second corner ring (302) and having a second opening through which the lead wire passes; and

and a fastening member (504) which integrally fastens the first fixing plate (502), the first angle ring (301), the first insulating plate (2031), the current transformer (105), the second insulating plate (2032), the second angle ring (302), and the second fixing plate (503) in this order.

4. The mounting device for a current transformer according to any one of claims 1 to 3,

the number of the current transformers (105) is three, and the insulation cylinder (201) is a paper cylinder.

5. A measuring device for a transformer, comprising:

the current transformer (105), the current transformer (105) is of an annular columnar structure;

the insulating cylinder (201), the said annular column structure is fitted over the outer wall of the said insulating cylinder (201); and

an insulating member (203) including a first insulating plate (2031) and a second insulating plate (2032), the first insulating plate (2031) and the second insulating plate (2032) being opposed to each other with the annular columnar structure interposed therebetween, each of the first insulating plate (2031) and the second insulating plate (2032) including:

an insulation plate opening (O), wherein each of the first insulation plate (2031) and the second insulation plate (2032) is sleeved on the outer wall of the insulation cylinder (201) through the respective insulation plate opening (O);

an inner surface of the insulating plate facing the annular columnar structure;

an insulating plate outer surface facing away from the annular columnar structure, wherein the insulating cylinder (201) does not extend beyond the insulating plate outer surface in a longitudinal direction; and

the groove at least comprises a first annular groove and a second annular groove which are arranged on the inner surface of the insulating plate and are concentric with the opening (O) of the insulating plate, and each of the first annular groove and the second annular groove is provided with a corresponding metal ring, wherein the inner diameter of the first annular groove is the same as that of the annular columnar structure, and the outer diameter of the second annular groove is the same as that of the annular columnar structure.

6. The measuring device for a transformer according to claim 5, further comprising:

a first angle ring (301), the first angle ring (301) being disposed on the insulating plate outer surface of the first insulating plate (2031), the first angle ring (301) comprising:

a first plane portion (3011) contacting the insulating plate outer surface of the first insulating plate (2031);

a first corner ring opening (3012) with an edge aligned with an inner wall of the insulating cylinder (201); and

a first cylindrical portion (3013) extending from the first angle ring opening (3012) into the insulation cylinder (201) along the inner wall of the insulation cylinder (201),

a second corner ring (302) disposed on the insulation plate outer surface of the second insulation plate (2032) opposite the first corner ring (301), the second corner ring (302) comprising:

a second plane part (3021) contacting the insulating plate outer surface of the second insulating plate (2032);

a second corner ring opening (3022) having an edge aligned with an inner wall of the insulation barrel (201); and

a second cylindrical portion (3023) extending from the second corner ring opening (3022) into the insulation barrel (201) along the inner wall of the insulation barrel (201).

7. The measuring device for a transformer according to claim 6, further comprising:

a first fixing plate (502) provided on the first corner ring (301) and having a first opening through which a lead wire detected by the current transformer (105) passes;

a second fixing plate (503) provided on the second corner ring (302) and having a second opening through which the lead wire passes; and

and a fastening member (504) which integrally fastens the first fixing plate (502), the first angle ring (301), the first insulating plate (2031), the current transformer (105), the second insulating plate (2032), the second angle ring (302), and the second fixing plate (503) in this order.

8. Measuring device for a transformer according to any of claims 5 to 7,

the number of the current transformers (105) is three, and the insulation cylinder (201) is a paper cylinder.

9. A transformer system, comprising:

a transformer configured to provide a voltage;

a cable termination (101) plug-connected to the transformer by a lead (103), the cable termination (101) configured to receive a voltage from the transformer through the lead (103) and to provide the received voltage to the powered device; and

the measuring device for a transformer according to any one of claims 5 to 8, fitted over a lead between the cable termination and the transformer.

10. The transformer system of claim 9,

the cable termination (101) comprises:

a sleeve (1011), one end of the sleeve (1011) comprising a male socket (1012);

a female seat (1013), one end of the female seat (1013) being connected to the lead wire (103),

wherein the cable termination (101) is plug-connected to the transformer by a lead (103) by inserting the male socket (1012) into the female socket (1013).

Technical Field

The present invention relates to the field of transformers, and more particularly, to a mounting apparatus for a current transformer, a measuring apparatus for a transformer, and a transformer system.

Background

In the application field of transformers, plug-in cable terminals are generally used to make field users safe and convenient to operate. When the bushing of the transformer is replaced, a user can simply replace the bushing by pulling the bushing out of the cable terminal. The plug-in cable terminal provides great convenience to users.

However, a Current Transformer (CT) cannot be placed at the tail of such a plug cable terminal structure, so that a user cannot monitor the temperature of the transformer winding and measure the amount of electricity using the CT placed at the tail of the plug cable terminal.

As an effective solution, the above measurement can be performed by placing a current transformer on the lead wire connecting the plug-in cable terminal and the transformer. However, when the voltage ratio of the transformer is high, for example, 66KV, 72.5KV or 220KV, the conventional current transformer is broken down due to the strong electromagnetic field on the lead wire, and thus cannot be operated normally.

Disclosure of Invention

In view of the situations and deficiencies of the prior art, an object of the present invention is to provide a current transformer installation apparatus, a transformer measurement apparatus and a transformer system, which are capable of monitoring the winding temperature and measuring the power consumption through the current transformer when a high-voltage plug-in cable terminal is applied, so that the field installation operation of the transformer is more convenient and the maintenance is safer.

According to an aspect of the present invention, there is provided a current transformer mounting apparatus including: the current transformer is sleeved on the outer wall of the insulating cylinder; and the insulating part comprises a first insulating plate and a second insulating plate, the first insulating plate and the second insulating plate are opposite and clamp the current transformer in the middle, and each first insulating plate and each second insulating plate comprise: the insulation cylinder is provided with a plurality of insulation plates, wherein each first insulation plate and each second insulation plate are sleeved on the outer wall of the insulation cylinder through the respective insulation plate openings; an inner surface of the insulating plate facing the current transformer; the outer surface of the insulating plate is opposite to the current transformer, wherein the insulating cylinder does not extend beyond the outer surface of the insulating plate in the longitudinal direction; and the grooves at least comprise a first annular groove and a second annular groove which are arranged on the inner surface of the insulating plate and are concentric with the opening of the insulating plate, and each of the first annular groove and the second annular groove is provided with a corresponding metal ring, wherein the inner diameter of the first annular groove is the same as that of the current transformer, and the outer diameter of the second annular groove is the same as that of the current transformer.

The current transformer is sleeved on the outer wall of the insulating cylinder, and the metal rings are arranged on the upper surface and the lower surface of the current transformer, so that sharp corners on the current transformer can be effectively shielded, the current transformer is prevented from being broken down by a strong electromagnetic field, the current transformer can still normally work under high voltage, the temperature of a transformer winding is monitored, the electricity consumption is measured, the field installation and operation of the transformer are more convenient, and the transformer is safer to maintain.

According to the mounting apparatus of a current transformer of the present invention, the mounting apparatus of a current transformer further comprises: first angle ring, first angle ring set up on the insulation board surface of first insulating board, and first angle ring includes: a first plane portion contacting an outer surface of the insulating plate of the first insulating plate; the edge of the first angle ring is aligned with the inner wall of the insulating cylinder; and a first cylindrical portion extending into the insulating cylinder from the first angle ring opening along the inner wall of the insulating cylinder, a second angle ring disposed on the outer surface of the insulating plate of the second insulating plate opposite to the first angle ring, the second angle ring including: a second plane part contacting an outer surface of the insulating plate of the second insulating plate; the edge of the second angle ring is aligned with the inner wall of the insulating cylinder; and a second cylindrical portion extending into the insulating cylinder from the second corner ring opening along an inner wall of the insulating cylinder.

Two ends of the current transformer are respectively provided with two angle rings, so that an electromagnetic field borne by the current transformer is more uniform, and the current transformer is further prevented from being broken down under high voltage.

According to the mounting apparatus of a current transformer of the present invention, the mounting apparatus of a current transformer further comprises: the first fixing plate is arranged on the first angle ring and is provided with a first opening through which a lead detected by the current transformer passes; the second fixing plate is arranged on the second angle ring and is provided with a second opening for the lead to pass through; and the fastener is used for fastening the first fixing plate, the first angle ring, the first insulating plate, the current transformer, the second insulating plate, the second angle ring and the second fixing plate into a whole in sequence.

Through two fixed plates and fasteners, each part of the mounting device and the current transformer can be formed into a whole, and the compactness of the device structure is improved.

According to the mounting device of the current transformer, the number of the current transformers is three, and the insulating cylinder is a paper cylinder.

The number of the current transformers can be set according to needs. The cost of the device can be saved by adopting the paper tube as the insulating tube.

According to another aspect of the present invention, there is provided a measuring apparatus for a transformer, including: the current transformer is of an annular columnar structure; the annular columnar structure is sleeved on the outer wall of the insulating cylinder; and the insulating part comprises a first insulating plate and a second insulating plate, wherein the first insulating plate and the second insulating plate are opposite and clamp the annular columnar structure in the middle, and each first insulating plate and each second insulating plate comprise: the insulation cylinder is provided with a plurality of insulation plates, wherein each first insulation plate and each second insulation plate are sleeved on the outer wall of the insulation cylinder through the respective insulation plate openings; an inner surface of the insulating plate facing the annular columnar structure; the insulating cylinder extends in the longitudinal direction to a position not beyond the outer surface of the insulating plate; and the grooves at least comprise a first annular groove and a second annular groove which are arranged on the inner surface of the insulating plate and are concentric with the opening of the insulating plate, and each of the first annular groove and the second annular groove is provided with a corresponding metal ring, wherein the inner diameter of the first annular groove is the same as that of the annular columnar structure, and the outer diameter of the second annular groove is the same as that of the annular columnar structure.

The current transformer is sleeved on the outer wall of the insulating cylinder, and the metal rings are arranged on the upper surface and the lower surface of the current transformer, so that sharp corners on the current transformer can be effectively shielded, the current transformer is prevented from being broken down by a strong electromagnetic field, the measuring device can still work normally under high voltage, the temperature of a transformer winding is monitored, the electricity consumption is measured, the field installation and operation of the transformer are more convenient, and the transformer is safer to maintain.

According to the measuring device for a transformer of the present invention, the measuring device for a transformer further comprises: first angle ring, first angle ring set up on the insulation board surface of first insulating board, and first angle ring includes: a first plane portion contacting an outer surface of the insulating plate of the first insulating plate; the edge of the first angle ring is aligned with the inner wall of the insulating cylinder; and a first cylindrical portion extending into the insulating cylinder from the first angle ring opening along the inner wall of the insulating cylinder, a second angle ring disposed on the outer surface of the insulating plate of the second insulating plate opposite to the first angle ring, the second angle ring including: a second plane part contacting an outer surface of the insulating plate of the second insulating plate; the edge of the second angle ring is aligned with the inner wall of the insulating cylinder; and a second cylindrical portion extending into the insulating cylinder from the second corner ring opening along an inner wall of the insulating cylinder.

Through setting up two angle rings respectively at current transformer's both ends, can make measuring device experience the electromagnetic field more even, further avoid measuring device to be punctured under high pressure.

According to the measuring device for a transformer of the present invention, the measuring device for a transformer further comprises: the first fixing plate is arranged on the first angle ring and is provided with a first opening through which a lead detected by the current transformer passes; the second fixing plate is arranged on the second angle ring and is provided with a second opening for the lead to pass through; and the fastener is used for fastening the first fixing plate, the first angle ring, the first insulating plate, the current transformer, the second insulating plate, the second angle ring and the second fixing plate into a whole in sequence.

Through two fixed plates and fasteners, the components of the measuring device can be formed into a whole, and the compactness of the device structure is improved.

According to the measuring device for the transformer, the number of the current transformers is three, and the insulating cylinder is a paper cylinder.

The number of the current transformers can be set according to needs. The cost of the device can be saved by adopting the paper tube as the insulating tube.

According to yet another aspect of the present invention, there is provided a transformer system comprising: a transformer configured to provide a voltage; a cable terminal plug-connected to the transformer through a lead wire, the cable terminal configured to receive a voltage from the transformer through the lead wire and to supply the received voltage to the electric device; and according to the measuring device for the transformer, the measuring device is sleeved on the lead between the cable terminal and the transformer.

According to the transformer system, the measuring device can still monitor the temperature of the transformer winding and measure the power consumption under high voltage, so that the field installation operation of the transformer is more convenient, and the maintenance is safer

According to the transformer system of the present invention, the cable termination includes: one end of the sleeve comprises a male seat; and a female socket, one end of which is connected to the lead wire, wherein the cable terminal is connected to the transformer by the lead wire by inserting the male socket into the female socket.

Through the plug-in connection of the male seat and the female seat, the field operation of the transformer is more convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram illustrating a connection relationship between a current transformer and a plug-in cable terminal in a transformer system having the plug-in cable terminal.

Fig. 2 shows a schematic view of a mounting apparatus of a current transformer according to an embodiment of the present invention.

Fig. 3 shows a schematic view of the first insulating plate and the grooves on its inner surface.

Fig. 4 shows a schematic view of a first angular ring.

Fig. 5 shows a sectional view of a current transformer including a mounting device completed by the assembly of the mounting device of the current transformer according to the embodiment of the present invention.

Fig. 6 shows a schematic view of a measuring device for a transformer according to another embodiment of the invention.

Fig. 7 shows a schematic diagram of a transformer system according to another embodiment of the invention.

Wherein the reference numbers are as follows:

100: transformer system

101: plug-in type cable terminal

1011: sleeve pipe

1012: male seat

1013: female seat

103: lead wire

105: current transformer

107: lifting seat

200: mounting device

201: insulating cylinder

203: insulating member

2031: first insulating plate

2032: second insulating plate

O: insulation board opening

2031-1: a first annular groove

2031-2: second annular groove

301: first corner ring

302: second angle ring

3011: a first plane part

3012: first angle ring opening

3013: a first cylindrical part

3021: a second planar section

3022: second corner ring opening

3023: second cylindrical portion

502: first fixing plate

503: second fixing plate

504: fastening piece

C1, C2: metal ring

600: measuring device

700: a transformer system.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments, not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

To facilitate understanding of the present invention, the connection relationship between the current transformer and the plug-in cable terminal in the transformer system having the plug-in cable terminal will be described first. Fig. 1 is a schematic diagram illustrating a connection relationship between a current transformer and a plug-in cable terminal in a transformer system having the plug-in cable terminal.

As shown in fig. 1, a transformer system 100 with a plug cable termination includes a transformer (not shown in fig. 1 for simplicity), a plug cable termination 101, leads 103, a current transformer 105, and a riser 107.

One end of the lead wire 103 is connected to the plug cable terminal 101, and the other end is connected to a transformer, not shown in fig. 1, to supply a voltage of the transformer to the plug cable terminal 101.

The plug-in cable terminal 101 includes a sleeve 1011 and a female housing 1013, one end of the sleeve 1011 is provided with a male housing 1012, and the other end is used for supplying a voltage to a consumer. The male housing 1012 of the bushing 1011 is connected or disconnected to the transformer by being inserted into or pulled out of the female housing 1013.

The current transformer 105 is sleeved on the lead wire 103 between the plug-in cable terminal 101 and the transformer to monitor the winding temperature, the power consumption and the like of the transformer.

The raised seat 107 is used to secure the plug cable terminal 101 and the lead wire 103.

According to one embodiment of the present invention, there is provided a mounting apparatus for a current transformer. Fig. 2 shows a schematic view of a mounting arrangement for a current transformer according to an embodiment of the invention; FIG. 3 shows a schematic view of a first insulating plate and a groove on its inner surface; FIG. 4 shows a schematic view of a first angular ring; fig. 5 is a sectional view of a current transformer including a mounting device, which is completed by the assembly of the mounting device of the current transformer according to the embodiment of the present invention, taken in a direction along the lead line shown in fig. 1 through the current transformer. The mounting apparatus of the current transformer according to the present invention will be described in detail with reference to fig. 2 to 5. For purposes of description, the same reference numbers will be used in the drawings to identify similar elements.

As shown in fig. 2, the current transformer mounting apparatus 200 according to the present invention includes an insulating cylinder 201 and an insulating member 203.

Specifically, the current transformer 105 is an annular cylindrical structure, and the annular cylindrical structure may be sleeved on the outer wall of the insulating cylinder 201. The insulating cylinder 201 may be a paper cylinder, but the present invention is not limited thereto, and the insulating cylinder 201 may also be another high temperature resistant insulating material, for example, high melting point aromatic polyamide (nomex).

The insulating member 203 includes a first insulating plate 2031 and a second insulating plate 2032 that are opposed to each other and sandwich the current transformer 105 therebetween, and since the first insulating plate 2031 and the second insulating plate 2032 have the same structure, the structure thereof will be specifically described below by taking only the first insulating plate 2031 as an example for the sake of simplicity.

Fig. 3 shows a schematic view of the first insulating plate 2031 and the grooves on its inner surface. As shown in fig. 3, the first insulation plate 2031 may include an insulation plate opening O and a ring groove, and the first and second ring grooves 2031-1 and 2031-2 are schematically shown in fig. 3, but the number of the ring grooves is not limited thereto and may be more or less as needed, for example, the number of the ring grooves may be 1 or 3, 4, 5, … …, n.

Each of the first insulating plate 2031 and the second insulating plate 2032 may be fitted over the outer wall of the insulating cylinder 201 through a respective insulating plate opening O.

A first annular groove 2031-1 and a second annular groove 2031-2 are provided on an inner surface of the first insulating plate 2031 facing the current transformer 105 concentrically with the insulating plate opening O. The first annular groove 2031-1 is disposed along the insulation plate opening O, and the second annular groove 2031-2 is disposed around the first annular groove 2031-1 outside the first annular groove 2031-1. The first annular recess 2031-1 has an inner diameter identical to the inner diameter of the current transformer 105, and the second annular recess 2031-2 has an outer diameter identical to the outer diameter of the current transformer 105.

As shown in fig. 5, respective metal rings C1 and C2 are provided in the first and second annular grooves 2031-1 and 2031-2, respectively. The metal ring may include a copper ring, an aluminum ring, etc., but the present invention is not limited thereto, and any metal having excellent conductivity may be used as the metal ring in the present invention.

As shown in fig. 2, when the first insulating plate 2031 and the second insulating plate 2032 are fitted over the outer wall of the insulating cylinder 201, the insulating cylinder 201 does not extend in the longitudinal direction more than the outer surface of the first insulating plate 2031 and the second insulating plate 2032 facing away from the current transformer 105.

Alternatively, as shown in fig. 5, the mounting device of the current transformer according to the present invention may further include a first angle ring 301 and a second angle ring 302.

The first angle ring 301 may be disposed on an outer surface of the first insulation plate 2031 facing away from the current transformer 105, and the second angle ring 302 may be disposed on an outer surface of the second insulation plate 2032 facing away from the current transformer 105. Since the first and second angular rings 301 and 302 have the same structure, the first angular ring 301 will be described in detail below as an example for simplicity.

Fig. 4 shows a schematic view of a first angular ring. As shown in fig. 4, the first angle ring 301 includes a first planar portion 3011, a first angle ring aperture 3012, and a first cylindrical portion 3013.

As shown in fig. 5, the first flat portion 3011 contacts the outer surface of the first insulation plate 2031, the edge of the first angle ring opening 3012 is aligned with the inner wall of the insulation cylinder 201, and the first cylindrical portion 3013 extends from the first angle ring opening 3012 into the insulation cylinder 201 along the inner wall of the insulation cylinder 201.

The second angular ring 302 has the same structure as the first angular ring 301. Specifically, the second horn ring 302 includes a second flat portion 3021, a second horn ring opening 3022, and a second cylindrical portion 3023.

As shown in fig. 5, the second flat portion 3021 contacts the outer surface of the second insulating plate 2032, the edge of the second corner ring opening 3022 is aligned with the inner wall of the insulating cylinder 201, and the second cylindrical portion 3023 protrudes from the second corner ring opening 3022 into the insulating cylinder 201 along the inner wall of the insulating cylinder 201.

Alternatively, as shown in fig. 5, the mounting apparatus of the current transformer according to the present invention may further include a first fixing plate 502, a second fixing plate 503, and a fastener 504.

The first fixing plate 502 is disposed on the first corner ring 301 and has a first opening (not shown in fig. 5) through which a lead wire detected by the current transformer 105 passes, which may be disposed at the center of the first fixing plate 502 or any other position.

The first fixing plate 502 may be a cardboard, but the present invention is not limited thereto, and any other suitable material may be used as needed.

A second fixing plate 503 is disposed on the second angular ring 302 and has a second opening (not shown in fig. 5) through which the lead wire detected by the current transformer 105 passes, which may be disposed at the center of the second fixing plate 503 or at any other position.

The second fixing plate 503 may be a cardboard, but the present invention is not limited thereto, and any other suitable material may be used as needed.

The lead wires are connected to the plug-in cable terminal and the transformer through the first opening and the second opening, respectively.

The fastener 504 may fasten the first fixing plate 502, the first angle ring 301, the first insulating plate 2031, the current transformer 105, the second insulating plate 2032, the second angle ring 302, and the second fixing plate 503 in order as one body. The fastener 504 may include a screw and nut, but the invention is not limited thereto and any other suitable fastening structure may be employed as desired.

In the above embodiment, the example in which the current transformers 105 are three is shown, but the present invention is not limited thereto, and the number of the circuit transformers 105 may be set to be more or less according to actual needs.

According to the installation device of the current transformer, the current transformer is sleeved on the outer wall of the insulating cylinder, and the metal rings are arranged on the upper surface and the lower surface of the current transformer, so that sharp corners on the current transformer can be effectively shielded, the current transformer is prevented from being broken down by a strong electromagnetic field, the current transformer can still normally work under high voltage, the temperature of a transformer winding is monitored, the electricity consumption is measured, the field installation operation of the transformer is more convenient, and the maintenance is safer. Through further setting up two angle rings respectively at current transformer's both ends, can make the electromagnetic field that current transformer survived more even, further avoid current transformer to be punctured under high voltage.

According to another embodiment of the present invention, a measuring device for a transformer is provided. Fig. 6 shows a schematic view of a measuring device for a transformer according to another embodiment of the invention. A measuring device for a transformer according to another embodiment of the disclosure is described below with reference to fig. 5 and 6.

As shown in fig. 6, a measuring apparatus 600 for a transformer according to another embodiment of the present invention may include a current transformer 105, an insulation cylinder 201, and an insulation member 203. The specific structures of the current transformer 105, the insulating cylinder 201, the insulating member 203 and the like have been described above with reference to fig. 2 to 5, and in order to avoid the excessive description and obscure the present invention, the specific structures of the current transformer 105, the insulating cylinder 201, the insulating member 203 and the like will not be described repeatedly below.

As shown in fig. 6, the current transformer 105 is an annular cylindrical structure, and the annular cylindrical structure is sleeved on the outer wall of the insulating cylinder 201.

The insulating member 203 includes a first insulating plate 2031 and a second insulating plate 2032 that face each other and sandwich the current transformer 105 therebetween. Each of the first and second insulating plates 2031 and 2032 may include an insulating plate aperture O, an insulating plate inner surface facing the annular columnar structure, an insulating plate outer surface facing away from the annular columnar structure, and a groove.

Each of the first insulating plate 2031 and the second insulating plate 2032 is fitted around the outer wall of the insulating cylinder 201 through a respective insulating plate opening O, and the insulating cylinder extends in the longitudinal direction not more than the outer surfaces of the insulating plates of the first insulating plate 2031 and the second insulating plate 2032.

The grooves include at least a first ring-shaped groove 2031-1 and a second ring-shaped groove 2031-2, in which a corresponding metal ring is disposed in each of the first and second ring-shaped grooves, respectively, provided on the inner surface of the insulation plate of each of the first and second insulation plates 2031 and 2032 concentrically with the opening of the insulation plate. The inner diameter of the first annular groove is the same as the inner diameter of the annular columnar structure of the current transformer 105, and the outer diameter of the second annular groove is the same as the outer diameter of the annular columnar structure.

Optionally, as shown in fig. 5, a measuring apparatus 600 for a transformer according to another embodiment of the present invention may further include a first angle ring 301 and a second angle ring 302 (not shown in fig. 6). The first angle ring 301 may be disposed on an outer surface of the first insulation plate 2031 facing away from the current transformer 105, and the second angle ring 302 may be disposed on an outer surface of the second insulation plate 2032 facing away from the current transformer 105.

The first flat portion 3011 of the first angle ring 301 contacts the outer surface of the first insulating plate 2031, the edge of the first angle ring opening 3012 of the first angle ring 301 is aligned with the inner wall of the insulating cylinder 201, and the first cylindrical portion 3013 of the first angle ring 301 protrudes from the first angle ring opening 3012 into the insulating cylinder 201 along the inner wall of the insulating cylinder 201.

The second flat portion 3021 of the second horn ring 302 contacts the outer surface of the second insulating plate 2032, the edge of the second horn ring opening 3022 of the second horn ring 302 is aligned with the inner wall of the insulating cylinder 201, and the second cylindrical portion 3023 of the second horn ring 302 protrudes from the second horn ring opening 3022 into the insulating cylinder 201 along the inner wall of the insulating cylinder 201.

Optionally, as shown in fig. 5, the measuring device 600 for a transformer according to the present invention may further include a first fixing plate 502, a second fixing plate 503, and a fastener 504 (not shown in fig. 6).

The first fixing plate 502 is disposed on the first corner ring 301 and has a first opening (not shown in fig. 5) through which a lead wire detected by the current transformer 105 passes, which may be disposed at the center of the first fixing plate 502 or any other position.

The first fixing plate 502 may be a cardboard, but the present invention is not limited thereto, and any other suitable material may be used as needed.

A second fixing plate 503 is disposed on the second angular ring 302 and has a second opening (not shown in fig. 5) through which the lead wire detected by the current transformer 105 passes, which may be disposed at the center of the second fixing plate 503 or at any other position.

The second fixing plate 503 may be a cardboard, but the present invention is not limited thereto, and any other suitable material may be used as needed.

The lead wires are connected to the plug-in cable terminal and the transformer through the first opening and the second opening, respectively.

The fastener 504 may fasten the first fixing plate 502, the first angle ring 301, the first insulating plate 2031, the current transformer 105, the second insulating plate 2032, the second angle ring 302, and the second fixing plate 503 in order as one body. The fastener 504 may include a screw and nut, but the invention is not limited thereto and any other suitable fastening structure may be employed as desired.

In the measuring device for the transformer according to another embodiment of the invention, the current transformer is sleeved on the outer wall of the insulating cylinder, and the metal rings are arranged on the upper surface and the lower surface of the current transformer, so that the sharp corners on the current transformer can be effectively shielded, the current transformer is prevented from being broken down by a strong electromagnetic field, the measuring device can still normally work under high voltage, the temperature of a winding of the transformer is monitored, the electricity consumption is measured, the field installation operation of the transformer is more convenient, and the maintenance is safer. Through setting up two angle rings respectively at current transformer's both ends, can make measuring device experience the electromagnetic field more even, further avoid measuring device to be punctured under high pressure.

According to another embodiment of the present invention, there is provided a transformer system, and fig. 7 shows a schematic view of a transformer system according to another embodiment of the present invention, which is different from the transformer system shown in fig. 1 in that the transformer system according to another embodiment of the present invention includes a measuring device 600 for a transformer according to another embodiment of the present invention instead of the current transformer 105, and the transformer system according to another embodiment of the present invention will be described in detail with reference to fig. 7.

As shown in fig. 7, a transformer system 700 according to another embodiment of the invention includes a transformer (not shown in fig. 7 for simplicity), a plug cable termination 101, a lead wire 103, a measuring device 600, and a riser 107.

A transformer, not shown in fig. 7, is configured to provide a voltage.

One end of the lead wire 103 is connected to the plug cable terminal 101, and the other end is connected to a transformer, not shown in fig. 7, to supply a voltage of the transformer to the plug cable terminal 101.

The plug-in cable terminal 101 includes a sleeve 1011 and a female housing 1013, and one end of the sleeve 1011 is provided with a male housing 1012 and the other end is used to supply a voltage received from a transformer to an electric device. The male housing 1012 of the bushing 1011 is connected or disconnected to the transformer by being inserted into or pulled out of the female housing 1013.

The measuring device 600 is sleeved on the lead wire 103 between the plug-in cable terminal 101 and the transformer to monitor the winding temperature, the power consumption and the like of the transformer. The specific structure and configuration of the measuring device 600 are described in detail above with reference to fig. 2 to 6, and are not repeated here.

The raised seat 107 is used to secure the plug cable terminal 101 and the lead wire 103.

According to the transformer system of the other embodiment of the invention, the measuring device can still monitor the temperature of the transformer winding and measure the power consumption under high voltage, so that the field installation and operation of the transformer are more convenient, and the maintenance is safer.

In the above embodiments of the present invention, the descriptions of the respective embodiments have different emphasis, and a part which is not described in detail in a certain embodiment may refer to the related descriptions of other embodiments.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.