CN111326333A - Multi-turn winding type primary conductor mounting structure of current transformer - Google Patents

Abstract

The invention relates to the field of current transformers, in particular to a multi-turn winding type primary conductor mounting structure of a current transformer, which comprises an upper oil conservator, a transformer body, a primary conductor, a clamping plate assembly, a P1 end conductive bar and a P2 end conductive bar, wherein the transformer body is arranged in the upper oil conservator, the primary conductor is wound on the transformer body, the P1 end conductive bar and the P2 end conductive bar are respectively arranged at two sides of the upper oil conservator, one end of the primary conductor is fixedly connected with the P1 end conductive bar through the clamping plate assembly after being led out, the other end of the primary conductor is fixedly connected with the P2 end conductive bar through the clamping plate assembly after being led out, the clamping plate assembly comprises an upper clamping plate, a lower clamping plate and a compression bolt, the end part of the primary conductor passes through the upper clamping plate and the lower clamping plate, and. The invention makes the primary conductor wrap the outer insulation of the transformer body according to the corresponding number of turns, solves the high accuracy requirement of the small current ratio mutual inductor, and is convenient to install and disassemble.

Description

Multi-turn winding type primary conductor mounting structure of current transformer

Technical Field

The invention relates to the field of current transformers, in particular to a multi-turn winding type primary conductor mounting structure of a current transformer.

Background

The oil-immersed inverted current transformer is a device for supplying current in an alternating current power system, measuring electric energy and protecting relays, the oil-immersed inverted current transformer obtains general acceptance of users with excellent performance, but when rated current is small, because the inverted primary conductor is a tubular structure, more turns can not be realized, the requirement on the high accuracy of the transformer can not be met easily on the one hand, the volume of an iron core and a secondary coil of the transformer can be increased on the other hand, and a lot of cost can be increased in the manufacturing process.

Disclosure of Invention

The invention aims to provide a multi-turn winding type primary conductor mounting structure of a current transformer, which enables a primary conductor to be wound on the outer insulation of a transformer body according to corresponding turns, solves the high accuracy requirement of the small current ratio transformer, and is convenient to mount and dismount because two ends of the primary conductor are led out and then fixedly connected with conductive bars on two sides of an upper oil conservator respectively through a clamping plate assembly.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a conductor mounting structure is once wound to many circles of current transformer, includes that last oil conservator, ware body, primary conductor, splint subassembly, P1 end lead electrical drainage and the electrically conductive row of P2 end, and the ware body is located in the oil conservator, and primary conductor wraps on the ware body, and the electrically conductive row of P1 end and the electrically conductive row of P2 end are located go up the oil conservator both sides, just after primary conductor one end is drawn forth through the splint subassembly with the electrically conductive row of P1 end links firmly, the other end draw forth after through the splint subassembly with the electrically conductive row of P2 end links firmly, the splint subassembly includes punch holder, lower plate and clamp bolt, and a conductor tip passes between by punch holder and the lower plate, just punch holder and lower plate link firmly through clamp bolt.

Go up conservator one side and be equipped with P1 end flange, the electrically conductive row of P1 end install in on the P1 end flange, and be in be equipped with insulating washer between the electrically conductive row of P1 end and the P1 end flange, the electrically conductive row of P1 end and insulating washer pass through the fixed bolt of P1 end and be fixed in on the P1 end flange, just be in the cover is equipped with insulation support on the fixed bolt of P1 end.

And P1 end sealing rings are arranged on two sides of the insulating gasket.

One side of the upper oil conservator is provided with a P2 end flange, the P2 end conducting bar is fixed on the P2 end flange through a P2 end fixing bolt, and a P2 end sealing ring is arranged between the P2 end conducting bar and the P2 end flange.

Arc-shaped pressing notches are formed in the upper clamping plate and the lower clamping plate.

The invention has the advantages and positive effects that:

1. the primary conductor is wound on the outer insulation of the transformer body according to the corresponding number of turns, the primary winding can be wound with 48 turns of copper stranded wires at most, the number of ampere turns is increased, the volume and the cost of the secondary iron core are reduced, and the requirement of a small current ratio mutual inductor on high accuracy is met.

2. After two ends of the primary conductor are led out, the primary conductor is fixedly connected with the P1 end conducting bar and the P2 end conducting bar respectively through the clamping plate assembly, and the installation and the disassembly are very convenient.

3. An insulating washer is arranged between the P1 end conductive bar and the P1 end flange, an insulating sleeve is sleeved on the P1 end fixing bolt, and the insulating sleeve and the insulating washer effectively isolate the P1 end fixing bolt from the P1 end conductive bar, so that the operation safety of a product is ensured.

Drawings

Figure 1 is a schematic structural view of the present invention,

figure 2 is a schematic view of the upper and lower clamping plates of figure 1 holding a primary conductor,

figure 3 is an end view of P1 in figure 1,

figure 4 is an enlarged view at a in figure 1,

fig. 5 is an enlarged view of fig. 1 at B.

The transformer comprises an upper oil conservator 1, a transformer body 2, a primary conductor 3, a P1 end flange 4, an insulating washer 5, an insulating sleeve 6, a P1 end conducting bar 7, a P1 end sealing ring 8, a P1 end fixing bolt 9, a P2 end sealing ring 10, a P2 end fixing bolt 11, a pressing bolt 12, a pressing notch 13, a P2 end conducting bar 14, a lower clamping plate 15, an upper clamping plate 16 and a P2 end flange 17.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 5, the present invention includes an upper oil conservator 1, a body 2, a primary conductor 3, a clamping plate assembly, a P1 end conducting bar 7 and a P2 end conducting bar 14, the body 2 is arranged in the upper oil conservator 1, the primary conductor 3 is wrapped on the outer insulation of the body 2 according to the corresponding number of turns, the P1 end conducting bar 7 and the P2 end conducting bar 14 are respectively arranged on both sides of the upper oil conservator 1, and one end of the primary conductor 3 is fixedly connected with the P1 end conducting bar 7 through the clamping plate assembly, the other end is fixedly connected with the P2 end conducting bar through the clamping plate assembly, as shown in fig. 2, the clamping plate assembly includes an upper clamping plate 16, a lower clamping plate 15 and a pressing bolt 12, wherein as shown in fig. 4 to 5, the lower clamping plate 15 is fixedly arranged on the P1 end conducting bar 7 or the P2 end conducting bar 14, the end of the primary conductor 3 is penetrated between the upper clamping plate 16 and the lower clamping plate 15, the upper clamping plate 16 and, the upper clamping plate 16 and the lower clamping plate 15 are provided with arc-shaped pressing notches 13. In this embodiment, the primary conductor 3 is made of a soft copper stranded wire, and is wrapped with crepe paper and a polyester film tape to form an external insulation, and 0-50 mm length is reserved at two ends of the primary conductor 3 and is not wrapped with an insulation for being connected with a corresponding end conducting bar. The upper conservator 1 and the body 2 are well known in the art.

As shown in fig. 1 and 3-4, go up conservator 1 one side and be equipped with P1 end flange 4, the electrically conductive row 7 in P1 end install in on the P1 end flange 4, and be equipped with insulating washer 5 between the electrically conductive row 7 in P1 end and the P1 end flange 4, the electrically conductive row 7 in P1 end and insulating washer 5 are fixed in on the P1 end flange 4 through P1 end fixing bolt 9, and the cover is equipped with insulating bush 6 on the P1 end fixing bolt 9, insulating bush 6 and insulating washer 5 are effective with P1 end fixing bolt 9 and the electrically conductive row 7 of P1 end keep apart, all be equipped with P1 end sealing washer 8 in insulating washer 5 both sides to prevent the transformer oil seepage. As shown in fig. 3, six P1 end fixing bolts 9 are provided in the present embodiment, each P1 end fixing bolt 9 is sleeved with an insulating sleeve 6, and the P1 end fixing bolts 9 are uniformly distributed along the circumferential direction.

As shown in fig. 1 and 5, a P2 end flange 17 is provided on the other side of the upper conservator 1, the P2 end conductive bar 14 is directly fixed on the P2 end flange 17 by a P2 end fixing bolt 11, and a P2 end sealing ring 10 is provided between the P2 end conductive bar 14 and the P2 end flange 17 to prevent transformer oil from leaking.

The working principle of the invention is as follows:

the primary conductor 3 is wrapped on the outer insulation of the transformer body 2 according to the corresponding number of turns, 48 turns of copper stranded wires can be wound on the primary winding at most, the number of turns of ampere is increased, the volume and the cost of a secondary iron core are reduced, the requirement of a small current ratio mutual inductor on high accuracy is met, two ends of the primary conductor 3 are fixedly connected with a P1 end conductive bar 7 and a P2 end conductive bar 14 respectively through a clamping plate assembly after being led out, the installation and the disassembly are convenient, in addition, an insulating washer 5 is arranged between the P1 end conductive bar 7 and a P1 end flange 4, an insulating sleeve 6 is sleeved on a P1 end fixing bolt 9, the insulating sleeve 6 and the insulating washer 5 effectively isolate the P1 end fixing bolt 9 from the P1 end conductive bar 7, and the operation safety of a product is guaranteed.

Claims (5)

1. The utility model provides a conductor mounting structure is once twined to current transformer multiturn which characterized in that: comprises an upper oil conservator (1), a body (2), a primary conductor (3), a splint component, a P1 end conducting bar (7) and a P2 end conducting bar (14), the body (2) is arranged in the upper oil conservator (1), the primary conductor (3) is wrapped on the body (2), the P1 end conductive bar (7) and the P2 end conductive bar (14) are respectively arranged at two sides of the upper oil conservator (1), one end of the primary conductor (3) is fixedly connected with the P1 end conductive bar (7) through a splint component after being led out, the other end of the primary conductor is fixedly connected with the P2 end conductive bar through a splint component after being led out, the clamping plate assembly comprises an upper clamping plate (16), a lower clamping plate (15) and a compression bolt (12), the end part of the primary conductor (3) passes through the space between the upper clamping plate (16) and the lower clamping plate (15), and the upper clamping plate (16) and the lower clamping plate (15) are fixedly connected through a compression bolt (12).

2. The current transformer multiturn wound primary conductor mounting structure of claim 1, wherein: go up oil conservator (1) one side and be equipped with P1 end flange (4), the electrically conductive row (7) of P1 end install in on P1 end flange (4), and be equipped with insulating washer (5) between electrically conductive row (7) of P1 end and P1 end flange (4), the electrically conductive row (7) of P1 end and insulating washer (5) are fixed in on P1 end flange (4) through P1 end fixing bolt (9), and are in the cover is equipped with bushing (6) on the end fixing bolt (9) of P1.

3. The current transformer multiturn wound primary conductor mounting structure of claim 2, wherein: and P1 end sealing rings (8) are arranged on two sides of the insulating gasket (5).

4. The current transformer multiturn wound primary conductor mounting structure of claim 1, wherein: go up oil conservator (1) one side and be equipped with P2 end flange (17), P2 end is led electrical drainage (14) and is fixed in through P2 end fixing bolt (11) on P2 end flange (17) be equipped with P2 end sealing washer (10) between P2 end is led electrical drainage (14) and P2 end flange (17).

5. The current transformer multiturn wound primary conductor mounting structure of claim 1, wherein: the upper clamping plate (16) and the lower clamping plate (15) are both provided with arc-shaped pressing notches (13).

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