CN214099389U

CN214099389U - Indoor high-voltage current transformer

Info

Publication number: CN214099389U
Application number: CN202120456191.8U
Authority: CN
Inventors: 万维辛
Original assignee: Zhejiang Shuoye Electric Power Technology Co ltd
Current assignee: Zhejiang Shuoye Electric Power Technology Co ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-08-31
Anticipated expiration: 2031-03-03

Abstract

The utility model discloses an indoor high-voltage current transformer, including iron core, high-pressure primary winding, low pressure secondary winding and dull and stereotyped base and insulator, the insulator is installed on dull and stereotyped base, is equipped with the iron core of mutual interlinkage, high-pressure primary winding and the low pressure secondary winding in the insulator, the top of insulator is provided with binding post of a plurality of, binding post with the high-pressure primary winding of the inside of insulator is connected, be equipped with on the bottom lateral wall of insulator and draw forth the wire, draw forth the wire with the low pressure secondary winding of the inside of insulator is connected. The utility model discloses optimize structural design, be equipped with on the bottom lateral wall of insulator and draw forth the wire, effectively guarantee advance, go out the line row with the generating line and carry out electric and mechanical connection in the main bus-bar room, connect convenient to use.

Description

Indoor high-voltage current transformer

Technical Field

The utility model relates to a current transformer field especially relates to indoor high-voltage current transformer.

Background

The totally-enclosed multi-winding current transformer is equipment for measuring current, electric energy or relay protection in a 10kV power system switch cabinet, the installation position of the totally-enclosed multi-winding current transformer is mainly in a main bus chamber of the 10kV switch cabinet, the installation mode mostly adopts a side installation or a forward installation mode, the totally-enclosed multi-winding current transformer used in the current power system mostly has the defects of inconvenient connection, small surface creepage distance, low pollution level, single transformation ratio, low capacity, easy electricity stealing and the like, the product performance is prolonged along with the service time, the internal and external insulation performance of the fully-enclosed multi-winding current transformer are reduced in different degrees, and the capacity and the transformation ratio can not meet the increasing requirements of the power system, thereby becoming the hidden trouble of safe operation of the equipment in the power system, always perplexing the maintainer of the power system, and becoming the problem urgently solved in the upgrading and development of.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the problem that above-mentioned prior art exists, provide indoor high tension current transformer, solve and connect shortcoming such as inconvenient, creepage distance is little and filthy grade is low.

The utility model provides a technical scheme that its technical problem adopted: the indoor high-voltage current transformer comprises an iron core, a high-voltage primary winding, a low-voltage secondary winding, a flat base and an insulator, wherein the insulator is installed on the flat base, the iron core, the high-voltage primary winding and the low-voltage secondary winding which are interlinked are arranged in the insulator, a plurality of primary wiring terminals are arranged at the top of the insulator and are connected with the high-voltage primary winding inside the insulator, and lead-out wires are arranged on the side wall of the bottom of the insulator and are connected with the low-voltage secondary winding inside the insulator.

In order to further improve the structure, a lead storage box for storing the lead wires is arranged on the flat plate base and comprises a box body with an opening at the upper part and a transparent box cover, a partition plate is arranged in the middle of the box body and divides the interior of the box body into a storage cavity at the upper part and a driving cavity at the lower part, a plurality of parallel guide rods are arranged in the driving cavity, slide blocks are arranged on the guide rods, wire pulling rods are arranged on the slide blocks, the guide rods are sleeved with slide block return springs, the slide blocks on adjacent guide rods are arranged at different ends of the corresponding slide block return springs, the position of the clapboard above the guide rod is correspondingly provided with a guide groove, the upper end of the wire poking rod extends into the containing cavity through the guide groove, the side wall of the containing cavity is provided with a wire outlet hole and a wire inlet hole which are respectively positioned at the two sides of the guide groove, the outgoing lead penetrates through the wire outlet hole after penetrating through the wire inlet hole, and the outgoing lead between the wire inlet hole and the wire outlet hole is wound on the wire poking rod in a Z shape.

Further perfection, the upper end of the guide rod is fixed with a grooved wheel for traction.

Further perfection, the wire inlet hole is provided with a lead fixing clamp.

Further perfection, the well upper portion of insulator is equipped with the annular groove, is equipped with a plurality of annular mounting grooves in the annular groove, the umbrella skirt piece of installing on the annular mounting groove.

Further perfect, the umbrella skirt piece is the loop configuration, including left lamellar body and right lamellar body two parts, left lamellar body one end and right lamellar body one end are articulated, and the left lamellar body other end and right lamellar body other end buckle are connected.

Further perfect, be equipped with the draw-in groove in the annular mounting groove, the draw-in groove is pegged graft with the full skirt piece and is cooperated, is clearance fit between full skirt piece and the annular mounting groove.

The utility model discloses profitable effect is:

1. the utility model discloses optimize structural design, be equipped with the extraction wire on the bottom lateral wall of insulator, effectively guarantee advance with the generating line in the main bus-bar room, go out the line row and carry out electric and mechanical connection, connect convenient to use, can install in the cubical switchboard body in a flexible way, use as electric current, electric energy measurement and relay protection, be equipped with the lead wire receiver that is used for accomodating the extraction wire on the dull and stereotyped base, can accomodate the arrangement to the extraction wire automatically, the extraction wire is difficult to damage.

2. The utility model discloses it is insulating stable, creepage distance is big. The utility model discloses an epoxy vacuum waters an organic whole structure that forms, and is insulating reliable and stable, the well upper portion of insulator is equipped with the annular groove, is equipped with a plurality of annular mounting grooves in the annular groove, the umbrella skirt piece of installing on the annular mounting groove, is equipped with the draw-in groove in the annular mounting groove, draw-in groove and umbrella skirt piece cooperation of pegging graft, clearance fit between umbrella skirt piece and the annular mounting groove has effectively increased insulating effect, has improved creepage distance, has improved filthy grade, and umbrella skirt piece is removable design moreover, can conveniently improve creepage distance to save the mould cost.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

fig. 2 is a schematic front view of the lead storage box;

fig. 3 is a schematic top view of the lead storage box with the lid removed;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 1;

FIG. 5 is a schematic view of the structure of the skirt sheet;

description of reference numerals: 1. an iron core, 2, a high-voltage primary winding, 3, a low-voltage secondary winding, 4, a flat plate base, 5, an insulator, 51, an annular groove, 52, an annular mounting groove, 53, an umbrella skirt piece, 531, a left piece body, 532, a right piece body, 54, a clamping groove, 6, a primary connecting terminal, 7, a lead wire, 8, a lead wire storage box, 81, a box body, 811, a storage cavity, 812, a driving cavity, 813, a lead wire hole, 814, a lead wire inlet hole, 815, a lead wire fixing clamp, 82, a box cover, 83, a partition plate, 831, a guide groove, 84, a guide rod, 841, a grooved pulley, 85, a sliding block, 86, a wire shifting rod, 87 and a sliding block reset spring.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

example 1: referring to the attached drawings 1-3, the indoor high-voltage current transformer comprises an iron core 1, a high-voltage primary winding 2, a low-voltage secondary winding 3, a flat base 4 and an insulator 5, wherein the insulator 5 is installed on the flat base 4, the iron core 1, the high-voltage primary winding 2 and the low-voltage secondary winding 3 which are interlinked are arranged in the insulator 5, a plurality of primary wiring terminals 6 are arranged at the top of the insulator 5, the primary wiring terminals 6 are connected with the high-voltage primary winding 2 in the insulator 5, a lead-out wire 7 is arranged on the side wall of the bottom of the insulator 5, and the lead-out wire 7 is connected with the low-voltage secondary winding 3 in the insulator 5. The lead-out wires can effectively ensure that the lead-out wires are electrically and mechanically connected with the bus lead-in and lead-out rows in the main bus chamber, the connection and the use are convenient, and the current transformer can be flexibly arranged in the switch cabinet body and used for current and electric energy metering and relay protection. The flat plate base 4 is provided with a lead storage box 8 for storing lead wires 7, the lead storage box 8 comprises a box body 81 with an opening at the upper part and a transparent box cover 82, a partition 83 is arranged at the middle part of the box body 81, the partition 83 divides the interior of the box body 81 into an upper storage cavity 811 and a lower driving cavity 812, a plurality of parallel guide rods 84 are arranged in the driving cavity 812, sliding blocks 85 are arranged on the guide rods 84, a wire poking rod 86 is arranged on each sliding block 85, a sliding block return spring 87 is sleeved on each guide rod 84, the sliding blocks 85 on the adjacent guide rods 84 are arranged at different ends of the corresponding sliding block return springs 87, a guide groove 831 is correspondingly arranged at the position above each guide rod 84 on the partition 83, the upper end of each wire poking rod 86 extends into the storage cavity 811 through the guide groove 831, a wire outlet 813 and a wire inlet hole 814 are arranged on the side wall of the storage cavity 811, and the wire outlet hole 813 and the inlet hole 814 are respectively arranged at two sides of the guide groove 831, the outgoing lead 7 penetrates through the wire outlet hole 813 after penetrating through the wire inlet hole 814, and the outgoing lead 7 between the wire inlet hole 814 and the wire outlet hole 813 is wound on the wire poking rod 86 in a Z shape. During the use, can follow wire hole 813 and draw out lead-out wire 7, lead-out wire 7 in the box becomes straight, the distance between the adjacent slider 85 reduces, slider reset spring 87 compresses, the length that lead-out wire 7 exposes is elongated, conveniently lead-out wire 7 connects instrument measuring current, when need not use lead-out wire 7, under slider reset spring 87 effect, slider 85 resets, lead-out wire 7 in the box is folding, the length that lead-out wire 7 exposes shortens, can accomodate the arrangement to lead-out wire 7 automatically, lead-out wire 7 is difficult to damage. A sheave 841 for traction is fixed at the upper end of the guide rod 84, so that friction force can be reduced, and a lead can be pulled conveniently. The lead fixing clamp 815 is arranged on the wire inlet hole 814, and can fix the inner end of the lead 7, so that the connection part of the lead 7 and the insulator 5 is prevented from being damaged by pulling.

Example 2: as shown in fig. 4 to 5, in embodiment 1, an annular groove 51 is provided at the middle upper portion of the insulator 5, a plurality of annular mounting grooves 52 are provided in the annular groove 51, and an umbrella skirt 53 is mounted on the annular mounting grooves 52. Umbrella skirt piece 53 is the loop configuration, including left lamellar body 531 and right lamellar body 532 two parts, left lamellar body 531 one end is articulated with right lamellar body 532 one end, and left lamellar body 531 other end and the other end buckle of right lamellar body 532 are connected, and the model size of umbrella skirt piece is conveniently changed, can conveniently improve creepage distance to save the mould cost. Be equipped with draw-in groove 54 in the annular mounting groove 52, draw-in groove 54 and umbrella skirt piece 53 are pegged graft and are cooperated, are clearance fit between umbrella skirt piece 53 and the annular mounting groove 52, have effectively increased insulating effect, have improved creepage distance, have improved filthy grade.

While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. Indoor high-voltage current transformer, characterized by: the transformer comprises an iron core (1), a high-voltage primary winding (2), a low-voltage secondary winding (3), a flat base (4) and an insulator (5), wherein the insulator (5) is installed on the flat base (4), the iron core (1), the high-voltage primary winding (2) and the low-voltage secondary winding (3) which are interlinked are arranged in the insulator (5), a plurality of primary wiring terminals (6) are arranged at the top of the insulator (5), the primary wiring terminals (6) are connected with the high-voltage primary winding (2) inside the insulator (5), lead-out wires (7) are arranged on the side wall of the bottom of the insulator (5), and the lead-out wires (7) are connected with the low-voltage secondary winding (3) inside the insulator (5).

2. The indoor high voltage current transformer of claim 1, wherein: the lead wire storage box (8) used for storing lead-out wires (7) is arranged on the flat plate base (4), the lead wire storage box (8) comprises a box body (81) with an upper opening and a transparent box cover (82), a partition plate (83) is arranged in the middle of the box body (81), the partition plate (83) divides the interior of the box body (81) into a storage cavity (811) at the upper part and a drive cavity (812) at the lower part, a plurality of parallel guide rods (84) are arranged in the drive cavity (812), a sliding block (85) is arranged on each guide rod (84), a wire poking rod (86) is arranged on each sliding block (85), a sliding block return spring (87) is sleeved on each guide rod (84), the sliding blocks (85) on adjacent guide rods (84) are arranged at different ends of the corresponding sliding block return springs (87), a guide groove (831) is correspondingly arranged at a position, above each guide rod (84), the upper end of each wire poking rod (86) extends into the storage cavity (811) through the guide groove (831), the wire outgoing hole (813) and the wire inlet hole (814) are formed in the side wall of the accommodating cavity (811), the wire outgoing hole (813) and the wire inlet hole (814) are located on two sides of the guide groove (831) respectively, the outgoing wire (7) penetrates through the wire outgoing hole (813) after penetrating through the wire inlet hole (814), and the outgoing wire (7) between the wire incoming hole (814) and the wire outlet hole (813) is wound on the wire poking rod (86) in a Z shape.

3. The indoor high voltage current transformer of claim 2, wherein: a sheave wheel (841) for traction is fixed at the upper end of the guide rod (84).

4. The indoor high voltage current transformer of claim 2, wherein: and a lead fixing clamp (815) is arranged on the wire inlet hole (814).

5. The indoor high voltage current transformer of claim 1, wherein: the middle upper part of the insulator (5) is provided with an annular groove (51), a plurality of annular mounting grooves (52) are formed in the annular groove (51), and umbrella skirt pieces (53) are mounted on the annular mounting grooves (52).

6. The indoor high voltage current transformer of claim 5, wherein: umbrella skirt piece (53) are the loop configuration, including left lamellar body (531) and right lamellar body (532) two parts, and left lamellar body (531) one end is articulated with right lamellar body (532) one end, and left lamellar body (531) other end and right lamellar body (532) other end buckle are connected.

7. The indoor high voltage current transformer of claim 5, wherein: a clamping groove (54) is formed in the annular mounting groove (52), the clamping groove (54) is in inserting fit with the umbrella skirt piece (53), and the umbrella skirt piece (53) is in clearance fit with the annular mounting groove (52).