CN204088218U - A kind of column type circuit breaker of integrated current instrument transformer - Google Patents

Abstract

The utility model discloses a post-type circuit breaker integrating current transformers, which comprises: at least one current transformer (2) and a circuit breaker body, and the circuit breaker body includes at least one arc-extinguishing unit (1) and a supporting insulator (3) ), the supporting insulator (3) is connected to the arc extinguishing unit (1) and supports the arc extinguishing unit (1), the current transformer (2) is fixedly arranged outside the circuit breaker body, and The current path of the circuit breaker body passes through the current transformer (2), and the supporting insulator (3) is embedded with an optical fiber connection line (6) connected to the current transformer (2). The utility model makes the whole system compact in structure and reduces the occupied area, and is especially suitable for the integrated application of the column circuit breaker and the current transformer in the intelligent substation, especially the integrated application of the isolation circuit breaker and the current transformer.

Description

A post type circuit breaker with integrated current transformer

technical field

The utility model relates to the related technical field of electric power products, in particular to a column circuit breaker integrating a current transformer.

Background technique

At present, in the typical layout of substations, disconnectors and grounding switches are generally equipped on the incoming and outgoing sides of high-voltage column circuit breakers. As a special high-voltage column circuit breaker, the isolation circuit breaker is innovatively proposed on the basis of the column circuit breaker and has become an IEC standard. It integrates the function of the traditional isolating switch into the column circuit breaker, uses the breaker of the circuit breaker to withstand the line voltage after the current is broken, and adds a grounding switch to realize the grounding of the high-voltage potential end of the original system after the current is broken, while enhancing the availability of the system Reduced system footprint.

However, in the prior art, the current transformer for measuring the line current and the post circuit breaker are independently configured, and the floor area of the whole system is still relatively large.

Utility model content

Based on this, it is necessary to provide a post circuit breaker integrated with a current transformer to solve the technical problem that the current transformer is not well integrated into the post circuit breaker in the prior art, resulting in a large overall system footprint.

A post circuit breaker with integrated current transformers, comprising: at least one current transformer and a circuit breaker body, the circuit breaker body includes at least one arc extinguishing unit and a supporting insulator, the supporting insulator is connected to the arc extinguishing unit And support the arc extinguishing unit, the current transformer is fixed outside the circuit breaker body, and the current path of the circuit breaker body passes through the current transformer, and the support insulator is embedded with the The fiber optic cable connected to the above-mentioned current transformer.

Further, the current transformer is sleeved on the current path of the circuit breaker body.

Furthermore, the current transformer is set on the current path of the circuit breaker body, specifically: the arc extinguishing unit is arranged above the supporting insulator and extends in the same direction, and the outlet end of the arc extinguishing unit It is connected with the support insulator through a support flange, and the current transformer is sleeved on the arc extinguishing unit and fixed on the upper surface of the support flange.

Further, the current transformer is sleeved on the circuit breaker body, specifically: the arc extinguishing unit is arranged above the supporting insulator and extends in the same direction, and the outlet end of the arc extinguishing unit and the Support insulator connection, the input end of the arc extinguishing unit is provided with an input end flange, the current transformer is fixed on the lower surface of the input end flange, and the current transformer is sleeved on the arc extinguishing unit , and the optical fiber connection line is embedded in the arc extinguishing unit and the supporting insulator.

Furthermore, the current transformer is set on the current path of the circuit breaker body, specifically:

There are two arc extinguishing units, and the two arc extinguishing units are conductively connected through a T-shaped and conductive arc extinguishing unit connector, and the arc extinguishing unit connector includes a transverse connecting portion that is electrically connected to each other to form a T-shaped structure and a vertical connecting portion, the two ends of the horizontal connecting portion are respectively connected to one end of the two arc extinguishing units, one end of the vertical connecting portion is connected to the support insulator, and the other end is connected to the horizontal The connection part is connected, and the end part connected with the transverse connection part of the arc extinguishing unit is a proximal part;

At least one of the current transformers is sleeved on the proximal end of the arc extinguishing unit, or at least one of the current transformers is sleeved at the connection between the arc extinguishing unit and the transverse connection portion, or at least one of the current transformers is The transformer is sleeved on the transverse connecting portion.

Furthermore, the current transformer is set on the current path of the circuit breaker body, specifically:

There are two arc extinguishing units, and the two arc extinguishing units are conductively connected through a T-shaped and conductive arc extinguishing unit connector, and the arc extinguishing unit connector includes a transverse connecting portion that is electrically connected to each other to form a T-shaped structure and a vertical connecting portion, the two ends of the horizontal connecting portion are respectively connected to one end of the two arc extinguishing units, one end of the vertical connecting portion is connected to the support insulator, and the other end is connected to the horizontal The connecting part is connected, and the end of the arc extinguishing unit away from the transverse connecting part is a distal part;

At least one current transformer is fixed at the far end of the arc extinguishing unit, and the optical fiber connection line is embedded in the arc extinguishing unit and the supporting insulator.

Furthermore, the current transformer is set on the current path of the circuit breaker body, specifically:

There are two arc extinguishing units, including a first arc extinguishing unit and a second arc extinguishing unit, and the first arc extinguishing unit conducts electricity with the second arc extinguishing unit through a T-shaped and conductive arc extinguishing unit connector The connecting part of the arc extinguishing unit includes a horizontal connecting part and a vertical connecting part that are conductively connected to each other to form a T-shaped structure. One end of the second arc extinguishing unit is connected, one end of the vertical connection is connected to the support insulator, the other end is connected to the horizontal connection, and the support insulator is connected to the vertical connection The end portion is a high-voltage end portion that conducts electricity with the vertical connection portion, the end portion connected to the horizontal connection portion of the first arc extinguishing unit is the first proximal end portion, and the second arc extinguishing unit is connected to the horizontal connection portion. The end connected to the transverse connecting portion is the second proximal portion, and the first proximal portion is insulated and connected to the transverse connecting portion through an insulating sheet, and the second proximal portion is directly conductively connected to the transverse connecting portion ;

At least one of the current transformers is sleeved on the high-voltage end of the support insulator, or at least one of the current transformers is sleeved at the connection between the support insulator and the vertical connection part, or at least one of the current transformers is The device is sleeved on the vertical connection part;

A conductor drawn out from the first proximal portion is conductively connected to the vertical connection portion below the current transformer.

Further, the current transformer is arranged on the side of the circuit breaker body, and the conductor drawn from the power outlet or power input end of the arc extinguishing unit passes through the electronic current transformer.

Furthermore, the current transformer is arranged on the side of the circuit breaker body, specifically: the arc extinguishing unit is arranged above the support insulator and extends in the same direction, and the outlet end of the arc extinguishing unit and the The support insulator is connected through a support flange, the current transformer is fixed on the outside of the support flange, and the conductor drawn from the outlet end of the arc extinguishing unit passes through the current transformer.

Furthermore, the current transformer is arranged on the side of the circuit breaker body, specifically: the arc extinguishing unit is arranged above the supporting insulator and extends in the same direction, and the power input end of the arc extinguishing unit is provided with The electric input end flange, the current transformer is fixed on the outside of the electric input end flange, the conductor drawn from the electric input end of the arc extinguishing unit passes through the current transformer, and the optical fiber connecting line embedded in the arc extinguishing unit and the support insulator.

Further, the support insulator includes a ground end as a ground potential and a high voltage end as a high voltage potential, the support insulator is connected to the arc extinguishing unit through the high voltage end, and the optical fiber connection line is embedded in the The supporting insulator extends from the grounding end to the high-voltage end, and the optical fiber connection wire extends from the high-voltage end and is connected to the current transformer.

Further, the current transformer is an electronic current transformer, including a protective case and an electro-optical conversion device, the protective case is provided with an induction coil, and the induction coil includes an air core coil and/or an iron core coil, the One end of the electro-optical conversion device is connected to the induction coil, and the other end is connected to the optical fiber connection line.

Furthermore, the current transformer further includes an energy harvesting coil arranged in the protective case, and one end of the electro-optical conversion device is respectively connected to the induction coil and the energy harvesting coil.

Further, the current transformer is an electronic current transformer, including a protective case and an induction coil arranged in the protective case, the induction coil includes a sensing optical fiber, and the induction coil is connected to the optical fiber connection line .

Further, a grounding switch is also included, one end of the grounding switch is connected to the arc extinguishing unit, and the other end is grounded.

Further, a bracket connected to the lower end of the supporting insulator and supporting the supporting insulator is also included.

The utility model embeds the optical fiber connecting wire connected with the current transformer into the support insulator, so that no additional parts are required for the optical fiber connecting wire, and the integration degree of the column circuit breaker and the current transformer is improved, so that the whole system has a compact structure and reduces The footprint is especially suitable for the integrated application of post circuit breakers and current transformers in smart substations, especially the integrated application of isolation circuit breakers and current transformers.

Description of drawings

Fig. 1 is a structural schematic diagram of a column circuit breaker integrating a current transformer;

Fig. 2 is the structural representation of the second preferred embodiment of the utility model;

Fig. 3 is the structural representation of the 3rd preferred embodiment of the present utility model;

Fig. 4 is a structural schematic diagram of an embodiment of the utility model having two arc extinguishing units;

Fig. 5 is a structural schematic diagram of another embodiment of the present invention with two arc extinguishing units.

Detailed ways

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

As shown in Figure 1, it is a schematic structural diagram of a column circuit breaker with integrated current transformer, including: at least one current transformer 2 and a circuit breaker body, and the circuit breaker body includes at least one arc extinguishing unit 1 and a supporting insulator 3 , the supporting insulator 3 is connected with the arc extinguishing unit 1 and supports the arc extinguishing unit 1, the current transformer 2 is fixedly arranged outside the circuit breaker body, and the current path of the circuit breaker body passes through Through the current transformer 2 , the supporting insulator 3 is embedded with an optical fiber connection line 6 connected with the current transformer 2 .

The current transformer 2 is used to measure the current, the arc extinguishing unit 1 is used to break the current, the support insulator 3 is used to support the arc extinguishing unit 1, the current transformer 2 and ensure the insulation to the ground, and the embedded optical fiber connecting line 6 is connected to the current mutual inductor The device 2 is used for data communication and/or laser energy supply of the current transformer 2.

Wherein, the optical fiber connection line 6 refers to the use of optical fiber as the connection line, one fiber or multiple strands of optical fiber can be used as the optical fiber connection line 6, and the optical fiber connection line 6 is wrapped with a protective layer. In the utility model, by embedding the optical fiber connecting wire 6 connected with the current transformer 2 into the supporting insulator 3, the integration degree of the column circuit breaker and the current transformer is improved, so that the whole system has a compact structure and reduces the occupied area. At the same time, since the current transformer is arranged on the outside of the circuit breaker body, that is, the support insulator 3 and the arc extinguishing unit 1, and the current transformer 2 is independent of the above-mentioned circuit breaker body, only the current path of the arc extinguishing unit 1 passes through the current mutual inductance Device 2. Therefore, the current transformer 2 can be manufactured independently, which brings great convenience when installing and maintaining the equipment.

In one of the embodiments, the current transformer 2 is sleeved on the current path of the circuit breaker body.

The current transformer 2 is placed on the circuit path of the circuit breaker body, that is, the current path equivalent to the arc extinguishing unit 1 passes through the current transformer 2, and the current transformer 2 can sense the current guided by the arc extinguishing unit 1. The generated electromagnetic field enables current measurement. At the same time, since the current transformer 2 is set on the circuit path of the circuit breaker body, it can be easily separated from the circuit breaker body, thereby greatly reducing the difficulty of installation and maintenance.

Preferably, the current transformer 2 is set on the current path of the circuit breaker body, specifically: the arc extinguishing unit 1 is arranged above the support insulator 3 and extends in the same direction, and the arc extinguishing unit 1 The power outlet 11 is connected to the support insulator 3 through a support flange 7 , and the current transformer 2 is sleeved on the arc extinguishing unit 1 and fixed on the upper surface of the support flange 7 .

Wherein, the upper end of the arc extinguishing unit 1 is the power input terminal 12, and the lower end is the power output terminal 11, then the whole arc extinguishing unit 1 is the current path of the circuit breaker body, therefore, the current transformer 2 is set on the arc extinguishing unit 1, That is, the current transformer 2 is set on the current path of the circuit breaker body.

In one of the embodiments, the current transformer 2 is set on the current path of the circuit breaker body, specifically: the arc extinguishing unit 1 is arranged above the support insulator 3 and extends in the same direction, and the extinguishing unit 1 The power outlet 11 of the arc extinguishing unit 1 is connected to the support insulator 3, the power inlet 12 of the arc extinguishing unit 1 is provided with a power inlet flange 9, and the current transformer 2 is set on the arc extinguishing unit 1 and fixed on the lower surface of the inlet flange 9, and the optical fiber connection line 6 is embedded in the arc extinguishing unit 1 and the supporting insulator 3.

As shown in Figure 4, it is a schematic structural diagram of an embodiment of the utility model with two arc extinguishing units. In one embodiment, the current transformer 2 is set on the current path of the circuit breaker body, specifically for:

There are two arc extinguishing units 1, and the two arc extinguishing units 1 are conductively connected through a T-shaped and conductive arc extinguishing unit connector 10, and the arc extinguishing unit connector 10 includes mutual conductive connections to form a T-shaped structure The horizontal connection part 101 and the vertical connection part 102, the two ends of the horizontal connection part 101 are respectively connected to one end of the two arc extinguishing units 1, and the one end of the vertical connection part 102 is connected to the support The insulator 3 is connected, and the end connected between the arc extinguishing unit 1 and the transverse connection part 101 is the proximal part 13;

At least one of the current transformers 2 is sleeved on the proximal portion 13 of the arc extinguishing unit 1, or at least one of the current transformers 2 is sleeved on the connection between the arc extinguishing unit 1 and the transverse connection portion 101, Or at least one of the current transformers 2 is sleeved on the transverse connecting portion 101 .

Wherein, there are two arc extinguishing units 1, wherein, as shown in FIG. The arc extinguishing unit 1 on the side flows out from the arc extinguishing unit 1 on the left side through the transverse connecting portion 101 . Therefore, the two arc extinguishing units 1 and the transverse connecting portion 101 constitute the current path of the circuit breaker body, and no matter where the current transformer 2 is placed on the two arc extinguishing units 1 and the transverse connecting portion 101, it is placed on the On the current path of the circuit breaker body.

Preferably, there are two current transformers 2, and they cover the proximal parts 13 of the two arc extinguishing units 1 respectively.

In one of the embodiments, the current transformer 2 is set on the current path of the circuit breaker body, specifically:

There are two arc extinguishing units 1, and the two arc extinguishing units 1 are conductively connected through a T-shaped and conductive arc extinguishing unit connector 10, and the arc extinguishing unit connector 10 includes mutual conductive connections to form a T-shaped structure The horizontal connection part 101 and the vertical connection part 102, the two ends of the horizontal connection part 101 are respectively connected to one end of the two arc extinguishing units 1, and the one end of the vertical connection part 102 is connected to the support The insulator 3 is connected, and the end of the arc extinguishing unit 1 away from the transverse connecting portion 101 is the distal portion 14;

At least one of the current transformers 2 is fixed at the distal end 14 of the arc extinguishing unit 1 , and the optical fiber connection line 6 is embedded in the arc extinguishing unit 1 and the supporting insulator 3 .

Since the two arc extinguishing units 1 and the transverse connecting portion 101 constitute the current path of the circuit breaker body, no matter where the current transformer 2 is set on the two arc extinguishing units 1 and the transverse connecting portion 101, it is set in the circuit breaker. Therefore, the current transformer 2 can be set on the distal part 14, and the optical fiber connection line 6 can be embedded in the arc extinguishing unit 1 and the supporting insulator 3 at the same time.

FIG. 5 is a schematic structural diagram of another embodiment of the utility model having two arc extinguishing units. In one embodiment, the current transformer 2 is set on the current path of the circuit breaker body, Specifically:

There are two arc extinguishing units 1, including a first arc extinguishing unit 110 and a second arc extinguishing unit 120. The first arc extinguishing unit 110 is connected to the second arc extinguishing unit through a T-shaped and conductive arc extinguishing unit connector 10. The two arc extinguishing units 120 are conductively connected, and the arc extinguishing unit connector 10 includes a horizontal connecting portion 101 and a vertical connecting portion 102 that are conductively connected to each other to form a T-shaped structure, and the two ends of the horizontal connecting portion 101 are respectively connected to the first One end of an arc extinguishing unit 110 is connected to one end of the second arc extinguishing unit 120, one end of the vertical connection portion 102 is connected to the supporting insulator 3, and the supporting insulator 3 is connected to the vertical The end connected to the connection part 102 is the high-voltage end part 31 that conducts electricity with the vertical connection part 102, and the end connected to the horizontal connection part 101 of the first arc extinguishing unit 110 is the first proximal part 111 , the end of the second arc extinguishing unit 110 connected to the transverse connecting portion 101 is the second proximal portion 121, and the first proximal portion 111 is insulated and connected to the transverse connecting portion 101 through the insulating sheet 11 , the second proximal portion 121 is directly conductively connected to the transverse connection portion 101;

At least one of the current transformers 2 is sleeved on the high-voltage end portion 31 of the supporting insulator 3, or at least one of the current transformers 2 is sleeved at the connection between the supporting insulator 3 and the vertical connection portion 102, or At least one of the current transformers 2 is sleeved on the vertical connection portion 102;

The conductor 15 drawn out from the first proximal portion 111 is conductively connected to the vertical connection portion 102 under the current transformer 2 .

Wherein, the high-voltage end portion 31 is conductive, the first proximal portion 111 is insulated and connected to the lateral connection portion 101 through the insulating sheet 11 , and the second proximal portion 121 is directly conductively connected to the lateral connection portion 101 . Therefore, the current enters from the first arc extinguishing unit 110, passes through the first proximal portion 111, the conductor 15, the vertical connecting portion 102, the transverse connecting portion 101, the second proximal portion 121, and finally flows from the second arc extinguishing unit 120. flow out. Or the current enters from the second arc extinguishing unit 120, passes through the second proximal portion 121, the horizontal connecting portion 101, the vertical connecting portion 102, the conductor 15, the first proximal portion 111 in sequence, and finally flows out from the first arc extinguishing unit 110 . Therefore, the first arc extinguishing unit 110, the first proximal portion 111, the conductor 15, the vertical connecting portion 102, the transverse connecting portion 101, the second proximal portion 121 and the second arc extinguishing unit 120 constitute the current path of the circuit breaker body .

The conductor 15 is conductively connected to the vertical connection portion 102 below the current transformer 2, that is, the conductor 15 can be connected to the high-voltage end 31 below the current transformer 2. Since the high-voltage end 31 is conductive, it is equivalent to The conductor 15 is conductively connected to the vertical connection part 102 , of course, the conductor 15 can also enter under the current transformer 2 and be directly connected to the vertical connection part 102 .

In one of the embodiments, the current transformer 2 is arranged on the side of the circuit breaker body, and the conductor drawn from the power outlet 11 or the power inlet 12 of the arc extinguishing unit 1 passes through the electronic circuit breaker. Current Transformer 2.

The upper end of the arc extinguishing unit 1 is the input terminal 12, and the lower end is the output terminal 11. The conductor drawn from the input terminal 12 or the output terminal 11 of the arc extinguishing unit 1 passes through the current transformer 2, which is equivalent to The current path of the arc extinguishing unit 1 passes through the current transformer 2, so that the current transformer 2 can sense the electromagnetic field generated by the current guided by the arc extinguishing unit 1, thereby realizing current measurement. Compared with the design of putting the current transformer 2 on the current path of the circuit breaker body, the volume of the current transformer 2 in this embodiment can be smaller, so the whole system has a more compact structure and a smaller footprint.

In one of the embodiments, the current transformer 2 is arranged on the side of the circuit breaker body, specifically: the arc extinguishing unit 1 is arranged above the support insulator 3 and extends in the same direction, and the arc extinguishing unit 1 1 and the support insulator 3 are connected through the support flange 7, the current transformer 2 is fixed on the outside of the support flange 7, and is drawn from the discharge end 11 of the arc extinguishing unit 1 The conductor passes through the current transformer 2.

The conductor drawn from the power outlet 11 of the arc extinguishing unit 1 passes through the current transformer 2, then the current enters from the power input 12 of the arc extinguishing unit 1, and passes through the arc extinguishing unit 1 from the power outlet 11 After flowing out, it enters the current transformer 2.

Preferably, the current transformer 2 is fixedly connected to the supporting flange 7 through a connecting piece 8 .

In one of the embodiments, the current transformer 2 is arranged on the side of the circuit breaker body, specifically: the arc extinguishing unit 1 is arranged above the support insulator 3 and extends in the same direction, and the arc extinguishing unit 1 The input end 12 of 1 is provided with an input end flange 9, the current transformer 2 is fixed on the outside of the input end flange 9, and the conductor drawn from the input end 12 of the arc extinguishing unit 1 passes through passing through the current transformer 2 , and the optical fiber connection line 6 is embedded in the arc extinguishing unit 1 and the supporting insulator 3 .

The conductor drawn from the power input terminal 12 of the arc extinguishing unit 1 passes through the current transformer 2, then the current first passes through the current transformer 2 and then enters the power input terminal 12, and passes through the arc extinguishing unit 1 and then from the power output terminal 11 flow out.

Preferably, the current transformer 2 is fixedly connected to the inlet flange 9 through a connecting piece similar to the connecting piece 8 .

In one of the embodiments, the support insulator 3 includes a ground end 32 as a ground potential and a high voltage end 31 as a high voltage potential, and the support insulator 3 is connected to the arc extinguishing unit 1 through the high voltage end 31 connection, the optical fiber connecting line 6 is embedded in the supporting insulator 3, and extends from the ground end 32 to the high voltage end 31, and the optical fiber connecting line 6 extends out from the high voltage end 31 and connects with the The current transformer 2 is connected.

The current transformer 2 can be a non-electronic current transformer (that is, a traditional current transformer) or an electronic current transformer.

The current transformer 2 is an electronic current transformer, including a protective case 21 and an electro-optical conversion device 22, the protective case 21 is provided with an induction coil, and the induction coil includes an air core coil and/or an iron core coil, so One end of the electro-optical conversion device 22 is connected to the induction coil, and the other end is connected to the optical fiber connection line 6 .

The electro-optical conversion device 22 is used to convert the electrical signal output by the induction coil into an optical signal and output it through the optical fiber connection line 6 . The electro-optical conversion device 22 has an interface connected with the optical fiber connection line 6 .

Among them, the iron core coil is preferably the coil used in the iron core type low-power current transformer in the national standard GB/T 20840.8.

Induction coils can be combined with different numbers of air-core coils and iron-core coils to meet the requirements of power system measurement and protection.

In one of the embodiments, the current transformer 2 is an electronic current transformer, and also includes an energy-taking coil arranged in the protective shell 21, and one end of the electro-optic conversion device 22 is respectively connected to the induction coil and the The energy-taking coil is connected.

By setting the energy-taking coil, the current of the arc extinguishing unit 1 can be converted to power the electro-optical conversion device 22 . The electro-optical conversion device 22 works under the drive of energy-taking coils, lasers or supercapacitors.

In one of the embodiments, the current transformer 2 includes a protective shell 21 and an induction coil arranged in the protective shell 21, the induction coil includes a sensing optical fiber, and the induction coil is connected to the optical fiber connection line 6 connect.

When the induction coil adopts the sensing optical fiber, it directly outputs the optical signal, so the electro-optical conversion device 22 is not needed.

The induction coil can use a combination of different numbers of sensing fibers to meet the requirements of power system measurement and protection.

In one of the embodiments, it also includes a grounding switch 5, which is used for grounding the arc extinguishing unit 1 when the column circuit breaker works as an isolation circuit breaker, and one end of the grounding switch 5 is connected to the arc extinguishing unit 1 connected to ground at the other end.

In one of the embodiments, it further includes a bracket 4 connected to the lower end of the supporting insulator 3 and supporting the supporting insulator 3 .

When the grounding switch 5 is configured, the bracket 4 is also used to support the grounding switch 5 .

Figure 1 is the first preferred embodiment of the utility model, the post circuit breaker integrates the air core coil and/or the iron core coil as the electronic current transformer of the induction coil, and the electronic current transformer is set in the arc extinguishing unit 1 In addition, specifically, it includes an arc extinguishing unit 1 placed perpendicular to the ground, an electronic current transformer 2 , a support insulator 3 embedded with an optical fiber connection line 6 , a bracket 4 and an optional grounding switch 5 . The arc extinguishing unit 1 , the electronic current transformer 2 , the support insulator 3 embedded with the optical fiber connection line 6 and the optional grounding switch 5 are mechanically connected and integrated, and placed on the support 4 .

The independently manufactured electronic current transformer 2 is mechanically fixed and set on the arc extinguishing unit 1 , and the current path between the power input terminal 12 and the power output terminal 11 passes through the electronic current transformer 2 . The electronic current transformer 2 includes a protective case 21 and an electro-optical conversion device 22 . The protective shell 21 is provided with an induction coil, and the induction coil adopts an air core coil and/or an iron core coil. The protective shell 21 is also provided with an energy harvesting coil to provide electrical energy to the electro-optical conversion device; the electro-optical conversion device 22 is placed close to the protective shell 21, and the required electric energy is provided by the energy harvesting coil and/or the energy supply laser. The supporting insulator 3 embedded with the optical fiber connecting wire 6 supports the arc extinguishing unit 1 and the electronic current transformer 2 . The optical fiber connecting line 6 is connected with the electronic current transformer 2, and the current signal induced by the electronic current transformer 2 is drawn out through the optical fiber connecting line 6. At the same time, the optical fiber connecting line 6 is also a path for powering the laser, providing the electric energy required by the electro-optical conversion device 22. .

As shown in Figure 2, it is a structural schematic diagram of the second best embodiment of the present utility model. The post circuit breaker integrates an electronic current transformer 2 using an air-core coil and/or an iron core coil as an induction coil. The device 2 is placed on the side of the supporting insulator 3, specifically, it includes an arc extinguishing unit 1 placed perpendicular to the ground, an electronic current transformer 2, a supporting insulator 3 embedded with an optical fiber connection line 6, a bracket 4 and an optional Grounding switch 5. The arc extinguishing unit 1 , the electronic current transformer 2 , the support insulator 3 embedded with the optical fiber connection line 6 and the optional grounding switch 5 are mechanically connected and integrated, and placed on the support 4 .

The independently manufactured electronic current transformer 2 is mechanically fixed at the junction of the arc extinguishing unit 1 and the supporting insulator 3, and the conductor (not shown in the figure) drawn from the power outlet 11 of the arc extinguishing unit 1 passes through the electronic current transformer 2. The electronic current transformer 2 is connected and fixed to the supporting flange 7 through the connecting piece 8 . The electronic current transformer 2 includes a protective case 21 and an electro-optical conversion device 22. The protective case 21 is provided with an induction coil, and the induction coil adopts an air core coil and/or an iron core coil. The protective shell 21 is also provided with an energy harvesting coil to provide electrical energy to the electro-optic conversion device; the electro-optic conversion device is placed close to the transformer body, and the required electrical energy is provided by the energy acquisition coil and/or the energy supply laser. The supporting insulator 3 embedded with the optical fiber connecting line 6 supports the arc extinguishing unit 1 and the electronic current transformer 2, the optical fiber connecting line 6 is connected with the electronic current transformer 2, and the current signal induced by the electronic current transformer 2 passes through the optical fiber connecting line 6, and the optical fiber connection line 6 is also the path for the energy supply laser, providing the electric energy required by the electro-optical conversion device.

As shown in Figure 3, it is a schematic structural diagram of the third preferred embodiment of the present utility model. The post circuit breaker integrates an electronic current transformer 2 using an optical fiber as an induction coil, and the electronic current transformer 2 is set in the arc extinguishing unit. 1 outside. Specifically, it includes an arc extinguishing unit 1 vertically placed on the ground, an electronic current transformer 2 , a support insulator 3 embedded with an optical fiber connection line 6 , a bracket 4 and an optional grounding switch 5 . The arc extinguishing unit 1 of the high-voltage column circuit breaker, the electronic current transformer 2, the support insulator 3 embedded with the optical fiber connection line 6, and the optional grounding switch 5 are mechanically connected and integrated, and placed on the bracket 4.

The independently manufactured electronic current transformer 2 is mechanically fixed at the junction of the arc extinguishing unit 1 and the supporting insulator 3 , and the current path between the input terminal 12 and the output terminal 11 passes through the electronic current transformer 2 . The electronic current transformer 2 includes a protective shell 21 and an induction coil arranged in the protective shell 21 . The induction coil adopts the sensing optical fiber and is located in the protective shell 21. Since it outputs optical signals, it does not need an electro-optical conversion device. The supporting insulator 3 embedded with the optical fiber connecting wire 6 supports the arc extinguishing unit 1 and the electronic current transformer 2, and the embedded optical fiber connecting wire 6 is connected with the electronic current transformer 2, and the current signal induced by the transformer is passed through the optical fiber connecting wire 6 elicited.

FIG. 4 is a schematic structural diagram of an embodiment of the present invention with two arc extinguishing units. The column circuit breaker integrates an electronic current transformer 2 including an air core coil and/or an iron core coil as an induction coil, or an optical fiber coil as an induction coil, and the electronic current transformer 2 is set outside the arc extinguishing unit 1 . Specifically, it includes two arc extinguishing units 1 placed parallel to the ground, at least one electronic current transformer 2 , a support insulator 3 embedded with an optical fiber connection line 6 , and a bracket 4 . The arc extinguishing unit 1 , the electronic current transformer 2 , and the support insulator 3 embedded with the optical fiber connection line 6 are mechanically connected and integrated, and placed on the bracket 4 .

The independently manufactured electronic current transformer 2 is mechanically fixed and sleeved on the proximal part 13 of the arc extinguishing unit 1, and is located on the current path of the circuit breaker body. The electronic current transformer 2 includes a protective shell 21 and an induction coil arranged in the protective shell 21 . The support insulator 3 embedded with the optical fiber connection line 6 supports two arc extinguishing units 1 and the electronic current transformer 2, and the embedded optical fiber connection line 6 is connected with the electronic current transformer 2, and the current signal induced by the transformer passes through the optical fiber Connecting line 6 leads out.

FIG. 5 is a schematic structural diagram of another embodiment of the present invention with two arc extinguishing units. The column circuit breaker integrates an electronic current transformer 2 including an air-core coil and/or an iron core coil as an induction coil, or an optical fiber coil as an induction coil, and the electronic current transformer 2 is set outside the support insulator 3 . Specifically, it includes two arc extinguishing units 1 placed parallel to the ground, at least one electronic current transformer 2 , a support insulator 3 embedded with an optical fiber connection line 6 , and a bracket 4 . The arc extinguishing unit 1 , the electronic current transformer 2 , and the support insulator 3 embedded with the optical fiber connection line 6 are mechanically connected and integrated, and placed on the bracket 4 .

The independently manufactured electronic current transformer 2 is mechanically fixed and sleeved on the high voltage end 31 of the supporting insulator 3, and is located on the current path of the circuit breaker body. The current path is composed of the first arc extinguishing unit 110 , the conductor 15 , the high voltage end 31 of the supporting insulator 3 , the T-shaped conductive connector 10 and the second arc extinguishing unit 120 . The electronic current transformer 2 includes a protective shell 21 and an induction coil arranged in the protective shell 21 . The support insulator 3 embedded with the optical fiber connection line 6 supports two arc extinguishing units 1 and the electronic current transformer 2, and the embedded optical fiber connection line 6 is connected with the electronic current transformer 2, and the current signal induced by the transformer passes through the optical fiber Connecting line 6 leads out.

The utility model realizes the miniaturization design of the column circuit breaker and the current transformer, and effectively reduces the occupied area of the system.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (16)

1. A column circuit breaker with integrated current transformer, characterized in that it comprises: at least one current transformer (2) and a circuit breaker body, and the circuit breaker body includes at least one arc extinguishing unit (1) and a supporting insulator (3), the supporting insulator (3) is connected to the arc extinguishing unit (1) and supports the arc extinguishing unit (1), and the current transformer (2) is fixedly arranged on the body of the circuit breaker outside, and the current path of the circuit breaker body passes through the current transformer (2), and the supporting insulator (3) is embedded with an optical fiber connection line (6) connected to the current transformer (2). 2. The post circuit breaker with integrated current transformer according to claim 1, characterized in that the current transformer (2) is sleeved on the current path of the circuit breaker body. 3. The pole circuit breaker with integrated current transformer according to claim 2, characterized in that, the current transformer (2) is sleeved on the circuit breaker body, specifically: the arc extinguishing unit (1 ) is arranged above the support insulator (3) and extends in the same direction, the power outlet (11) of the arc extinguishing unit (1) and the support insulator (3) are connected through a support flange (7), the The current transformer (2) is sleeved on the arc extinguishing unit (1) and fixed on the upper surface of the supporting flange (7). 4. The post circuit breaker with integrated current transformer according to claim 2, characterized in that, the current transformer (2) is set on the current path of the circuit breaker body, specifically: the arc extinguishing The unit (1) is arranged above the support insulator (3) and extends in the same direction, the outlet end (11) of the arc extinguishing unit (1) is connected to the support insulator (3), and the arc extinguishing unit ( 1) The input end (12) is provided with an input end flange (9), and the current transformer (2) is set on the arc extinguishing unit (1) and fixed on the input end flange (9). ), and the optical fiber connection line (6) is embedded in the arc extinguishing unit (1) and the supporting insulator (3). 5. The post circuit breaker with integrated current transformer according to claim 2, characterized in that, the current transformer (2) is set on the current path of the circuit breaker body, specifically: There are two arc extinguishing units (1), and the two arc extinguishing units (1) are conductively connected through a T-shaped and conductive arc extinguishing unit connector (10), and the arc extinguishing unit connector (10) It includes a horizontal connection part (101) and a vertical connection part (102) that are electrically connected to each other to form a T-shaped structure, and the two ends of the horizontal connection part (101) are respectively connected to one end of the two arc extinguishing units (1). One end of the vertical connection part (102) is connected to the support insulator (3), and the end of the arc extinguishing unit (1) connected to the horizontal connection part (101) is the proximal part ( 13); At least one current transformer (2) is sleeved on the proximal part (13) of the arc extinguishing unit (1), or at least one current transformer (2) is sleeved on the arc extinguishing unit (1) and The connection of the transverse connection part (101), or at least one of the current transformers (2) is sleeved on the transverse connection part (101). 6. The post circuit breaker with integrated current transformer according to claim 1, characterized in that, the current transformer (2) is set on the current path of the circuit breaker body, specifically: There are two arc extinguishing units (1), and the two arc extinguishing units (1) are conductively connected through a T-shaped and conductive arc extinguishing unit connector (10), and the arc extinguishing unit connector (10) It includes a horizontal connection part (101) and a vertical connection part (102) that are electrically connected to each other to form a T-shaped structure, and the two ends of the horizontal connection part (101) are respectively connected to one end of the two arc extinguishing units (1). One end of the vertical connection part (102) is connected to the support insulator (3), and the end of the arc extinguishing unit (1) away from the horizontal connection part (101) is the distal part (14 ); At least one of the current transformers (2) is fixed on the far end (14) of the arc extinguishing unit (1), and the optical fiber connection line (6) is embedded in the arc extinguishing unit (1) and the arc extinguishing unit (1). inside the support insulator (3). 7. The post circuit breaker with integrated current transformer according to claim 2, characterized in that, the current transformer (2) is set on the current path of the circuit breaker body, specifically: There are two arc extinguishing units (1), including a first arc extinguishing unit (110) and a second arc extinguishing unit (120), and the first arc extinguishing unit (110) uses a T-shaped and conductive arc extinguishing The unit connector (10) is conductively connected to the second arc extinguishing unit (120), and the arc extinguishing unit connector (10) includes a horizontal connection part (101) and a vertical connection part that are electrically connected to each other to form a T-shaped structure (102), both ends of the transverse connecting portion (101) are respectively connected to one end of the first arc extinguishing unit (110) and one end of the second arc extinguishing unit (120), the One end of the vertical connection part (102) is connected to the support insulator (3), and the end part of the support insulator (3) connected to the vertical connection part (102) is connected to the vertical connection part (102). ) conductive high-voltage end portion (31), the end connected between the first arc extinguishing unit (110) and the transverse connection portion (101) is the first proximal end portion (111), and the second arc extinguishing unit (110) The end connected to the transverse connection part (101) is the second proximal part (121), and the first proximal part (111) is connected to the transverse connection part ( 101) Insulated connection, the second proximal portion (121) is directly conductively connected to the transverse connection portion (101); At least one current transformer (2) is sleeved on the high voltage end (31) of the support insulator (3), or at least one current transformer (2) is sleeved on the support insulator (3) and the The joint of the vertical connection part (102), or at least one of the current transformers (2) is sleeved on the vertical connection part (102); The conductor (15) drawn out from the first proximal portion (111) is conductively connected with the vertical connection portion (102) under the current transformer (2). 8. The post-type circuit breaker with integrated current transformer according to claim 1, characterized in that, the current transformer (2) is arranged on the side of the circuit breaker body, and from the arc extinguishing unit (1 ) through the current transformer (2) through the conductor drawn from the electricity outlet (11) or the electricity inlet (12). 9. The column circuit breaker with integrated current transformer according to claim 8, characterized in that, the current transformer (2) is arranged on the side of the circuit breaker body, specifically: the arc extinguishing unit ( 1) set above the support insulator (3) and extend in the same direction, the outlet end (11) of the arc extinguishing unit (1) and the support insulator (3) are connected through a support flange (7), the The current transformer (2) is fixed on the outside of the supporting flange (7), and the conductor drawn from the power outlet (11) of the arc extinguishing unit (1) passes through the current transformer (2). 10. The column circuit breaker with integrated current transformer according to claim 8, characterized in that, the current transformer (2) is arranged on the side of the arc extinguishing unit (1), specifically: the extinguishing unit The arc unit (1) is arranged above the support insulator (3) and extends in the same direction, the input end (12) of the arc extinguishing unit (1) is provided with an input end flange (9), and the current mutual inductance The device (2) is fixed on the outside of the inlet flange (9), the conductor drawn from the inlet end (12) of the arc extinguishing unit (1) passes through the current transformer (2), and The optical fiber connection line (6) is embedded in the arc extinguishing unit (1) and the supporting insulator (3). 11. The column circuit breaker with integrated current transformer according to claim 1, characterized in that, the supporting insulator (3) includes a grounding end (32) as a grounding potential and a high voltage end (32) as a high voltage potential ( 31), the supporting insulator (3) is connected to the arc extinguishing unit (1) through the high-voltage end (31), the optical fiber connection line (6) is embedded in the supporting insulator (3), from the The grounding end (32) extends to the high-voltage end (31), and the optical fiber connection line (6) extends from the high-voltage end (31) and is connected to the current transformer (2). 12. The post circuit breaker with integrated current transformer according to claim 1, characterized in that, the current transformer (2) is an electronic current transformer, comprising a protective case (21) and an electro-optical conversion device (22 ), the protective shell (21) is provided with an induction coil, and the induction coil includes an air core coil and/or an iron core coil, one end of the electro-optical conversion device (22) is connected to the induction coil, and the other end is connected to the induction coil. The fiber optic cable (6) is connected. 13. The pole circuit breaker with integrated current transformer according to claim 12, characterized in that, the current transformer (2) further comprises an energy-taking coil arranged in the protective shell (21), the One end of the electro-optical conversion device (22) is respectively connected with the induction coil and the energy-taking coil. 14. The column circuit breaker with integrated current transformer according to claim 1, characterized in that, the current transformer (2) is an electronic current transformer, including a protective case (21) and set on the protective case (21). An induction coil in the shell (21), the induction coil includes a sensing optical fiber, and the induction coil is connected to the optical fiber connection line (6). 15. The column circuit breaker with integrated current transformer according to claim 1, further comprising a grounding switch (5), one end of the grounding switch (5) is connected to the arc extinguishing unit (1), The other end is grounded. 16. The post circuit breaker with integrated current transformer according to claim 1, further comprising a bracket (4) connected to the lower end of the support insulator (3) and supporting the support insulator (3).