CN216435656U

CN216435656U - Pluggable current transformer of high-voltage switch cabinet

Info

Publication number: CN216435656U
Application number: CN202122394731.7U
Authority: CN
Inventors: 戴胜潮
Original assignee: Yunnan Minyang Electric Co ltd
Current assignee: Yunnan Minyang Electric Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-05-03
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to a high tension switchgear technical field discloses a high tension switchgear can peg graft current transformer, which comprises a housin, the inside fixedly connected with spacer ring of casing, the inboard of spacer ring is provided with the iron core respectively and is located the inboard first coil of iron core, the equal fixedly connected with in both ends and the inside fixed connection's of casing inserted sheet of first coil, be provided with the second coil on the iron core, the left end electric connection of second coil has the first wiring end with the inside fixed connection of casing. This high tension switchgear can peg graft current transformer possesses advantages such as convenient to use, has solved prior art, and current transformer is that the secondary winding number of turns is more, concatenates on measuring instrument, because secondary winding both ends wiring end rigidity, can not adjust the length that secondary winding inserts measuring instrument, makes the electric current can reach the scope that measuring instrument detected, and then confirms initial normal operating current, leads to the problem of not being convenient for to use.

Description

Pluggable current transformer of high-voltage switch cabinet

Technical Field

The utility model relates to a high tension switchgear technical field specifically is a high tension switchgear can peg graft current transformer.

Background

Along with the application of power equipment is more and more extensive, miniaturization, compactification, the security requirement is also more and more high, the cubical switchboard is also more and more compact, the volume is more and more littleer, wherein the most representative is exactly gas insulated cabinet, solid insulated cabinet etc. it is more compact that the interior component arrangement of cubical switchboard is also more and more compact, when satisfying live gap in the national standard, make each component in the cabinet link up closely, current transformer makes pluggable formula and plug-in type contact box cooperation use, satisfy live gap requirement and reduced the interval of mutual-inductor and contact box again, also practiced thrift the man-hour of installing.

In the prior art, the current transformer has more turns of a secondary winding and is connected in series with a measuring instrument, and because the wiring ends at two ends of the secondary winding are fixed, the length of the secondary winding connected into the measuring instrument cannot be adjusted, so that the current can reach the detection range of the measuring instrument, and the initial normal operation current is further determined, which causes inconvenience in use, so that the high-voltage switch cabinet can be plugged with the current transformer to solve the problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high tension switchgear can peg graft current transformer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a current transformer can be inserted into a high-voltage switch cabinet, which comprises a shell, wherein a separating ring is fixedly connected to the inside of the shell, an iron core and a first coil positioned on the inner side of the iron core are respectively arranged on the inner side of the separating ring, inserting pieces fixedly connected with the inside of the shell are respectively arranged at the two ends of the first coil, a second coil is arranged on the iron core, a first wiring end fixedly connected with the inside of the shell is electrically connected with the left end of the second coil, a strip-shaped hole is formed in the outer side of the shell, spheres which are distributed equidistantly and are electrically connected with the second coil are fixedly connected with the inside of the separating ring, a second wiring end is movably connected with the inside of the strip-shaped hole, a limiting block positioned inside the shell is fixedly connected with the outer side of the second wiring end, a positioning ring positioned on the outer side of the shell is connected with the outer side of the second wiring end through threads, and a conductive block laminated with the outer side of the spheres is movably connected with the inner side of the second wiring end, and a spring positioned in the second wiring terminal is arranged at one end of the conductive block, which is far away from the ball body.

The utility model has the advantages that:

this high tension switchgear can insert current transformer, through two inserted sheets series connection with first coil connection to the circuit that needs measuring current, connect first wiring end and second wiring end in series on measuring instrument, when first coil has the current through the time, according to the electromagnetic induction principle, produce induced-current in the second coil, through rotating the holding ring, the holding ring keeps away from the casing, remove the second wiring end, the second wiring end drives the stopper and removes, the second wiring end drives the conducting block and removes and extrudees the spring, the conducting block breaks away from the spheroid, with the spheroid contact of other positions, make the length change that the second coil inserts measuring instrument, make the electric current can reach measuring instrument detection's scope, and then confirm initial normal operating current, thereby reach the purpose of convenient to use.

As a further aspect of the present invention: the outside fixedly connected with connecting block of casing, the bottom fixedly connected with installation piece of connecting block, the bolt hole has been seted up at the top of installation piece.

Adopt above-mentioned further scheme's beneficial effect be, the connecting block is used for supporting the casing, and the installation piece is used for the installation fixed.

As a further aspect of the present invention: the inner side of the separating ring is filled with filler, and the filler is epoxy resin.

The beneficial effect of adopting above-mentioned further scheme is that, filler is used for separating and protecting first coil and second coil.

As a further aspect of the present invention: the first wiring terminal comprises a first wiring terminal fixedly connected with the inside of the shell, and a first compression screw is connected to the inner thread of the first wiring terminal.

Adopt above-mentioned further scheme's beneficial effect be, first housing screw and the cooperation of first terminal for compress tightly the location connecting wire.

As a further aspect of the present invention: two adjacent spheres are electrically connected with adjacent turns on the second coil, and one side of the conductive block is provided with a groove matched with the spheres.

Adopt above-mentioned further scheme's beneficial effect be, the recess is used for spacing conducting block.

As a further aspect of the present invention: the second wiring end comprises a second wiring terminal which is movably connected with the inside of the strip-shaped hole and fixedly connected with the inside of the limiting block, and the inner thread of the second wiring terminal is connected with a second compression screw.

Adopt above-mentioned further scheme's beneficial effect be, second terminal and the cooperation of second housing screw for compress tightly the location connecting wire, the stopper is used for spacing and direction second terminal.

As a further aspect of the present invention: the outside of second terminal is seted up with the thread groove of holding ring looks adaptation, the movable groove that is located the conducting block outside is seted up to the inside of second terminal, the spring is located the inside of movable groove, one side of holding ring is provided with the slipmat that closely laminates with the casing outside.

Adopt above-mentioned further scheme's beneficial effect be, holding ring and slipmat are used for spacing second terminal.

Drawings

Fig. 1 is a schematic structural diagram of a pluggable current transformer of a high-voltage switch cabinet;

FIG. 2 is a sectional view of a pluggable current transformer of a high-voltage switch cabinet;

FIG. 3 is a right sectional view of a spacer ring in a pluggable current transformer of a high voltage switch cabinet;

fig. 4 is an enlarged view of a pluggable current transformer of the high-voltage switch cabinet at a position in fig. 2.

In the figure: 1. a housing; 2. a spacer ring; 3. an iron core; 4. a first coil; 5. inserting sheets; 6. a second coil; 7. a first terminal; 71. a first terminal post; 72. a first compression screw; 8. a strip-shaped hole; 9. a sphere; 10. a second terminal; 101. a second terminal; 102. a second compression screw; 11. a limiting block; 12. a positioning ring; 13. a conductive block; 14. a spring; 15. connecting blocks; 16. mounting blocks; 17. and (4) filling materials.

Detailed Description

Referring to fig. 1-4, in the embodiment of the present invention, a pluggable current transformer for a high voltage switch cabinet comprises a housing 1, a separating ring 2 is fixedly connected to the inside of the housing 1, an iron core 3 and a first coil 4 located inside the iron core 3 are respectively disposed inside the separating ring 2, both ends of the first coil 4 are fixedly connected to an inserting piece 5 fixedly connected to the inside of the housing 1, the iron core 3 is provided with a second coil 6, the left end of the second coil 6 is electrically connected to a first connecting terminal 7 fixedly connected to the inside of the housing 1, the outside of the housing 1 is provided with a bar-shaped hole 8, the inside of the separating ring 2 is fixedly connected to balls 9 equidistantly distributed and electrically connected to the second coil 6, the inside of the bar-shaped hole 8 is movably connected to a second connecting terminal 10, the outside of the second connecting terminal 10 is fixedly connected to a limiting block 11 located inside the housing 1, the outside of the second connecting terminal 10 is threadedly connected to a positioning ring 12 located outside the housing 1, the inside of the second terminal 10 is movably connected with a conductive block 13 attached to the outside of the sphere 9, one end of the conductive block 13 far away from the sphere 9 is provided with a spring 14 positioned inside the second terminal 10, the outside of the housing 1 is fixedly connected with a connecting block 15, the bottom of the connecting block 15 is fixedly connected with an installation block 16, the top of the installation block 16 is provided with a bolt hole, the connecting block 15 is used for supporting the housing 1, the installation block 16 is used for installation and fixation, the inner side of the separation ring 2 is filled with a filler 17, the filler 17 is epoxy resin, the filler 17 is used for separating and protecting the first coil 4 and the second coil 6, the first terminal 7 comprises a first terminal 71 fixedly connected with the inside of the housing 1, the internal thread of the first terminal 71 is connected with a first compression screw 72, the first compression screw 72 is matched with the first terminal 71 and is used for compressing and positioning the connecting wire, two adjacent spheres 9 are electrically connected with adjacent turns on the second coil 6, the recess with spheroid 9 looks adaptation is seted up to one side of conducting block 13, the recess is used for spacing conducting block 13, second terminal 10 include with 8 inside swing joint in bar hole and with stopper 11 inside fixed connection's second terminal 101, the internal thread of second terminal 101 is connected with second housing screw 102, second terminal 101 and the cooperation of second housing screw 102, be used for compressing tightly the location connecting wire, stopper 11 is used for spacing and direction second terminal 101, the thread groove with 12 looks adaptations of holding ring is seted up in the outside of second terminal 101, the movable groove that is located the conducting block 13 outside is seted up to the inside of second terminal 101, spring 14 is located the inside in movable groove, one side of holding ring 12 is provided with the slipmat that closely laminates in the outside of casing 1, holding ring 12 and slipmat are used for spacing second terminal 101.

The utility model discloses a theory of operation is:

the first step is as follows: the shell 1 is positioned and installed inside the switch cabinet through the installation block 16, the two inserting pieces 5 connected with the first coil 4 are connected in series to a circuit needing to measure current, the first terminal 7 and the second terminal 10 are connected in series to a measuring instrument, and when the first coil 4 has current flowing, the second coil 6 generates induced current according to the electromagnetic induction principle;

the second step is that: through rotating the holding ring 12, the casing 1 is kept away from to the holding ring 12, removes second terminal 101, and second terminal 101 drives stopper 11 and removes, and second terminal 101 drives conducting block 13 and removes and extrudees spring 14, and conducting block 13 breaks away from spheroid 9, and spheroid 9 contact with other positions for the length change that second coil 6 inserts measuring instrument makes the electric current can reach the scope that measuring instrument detected, and then confirms initial normal operating current.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a high tension switchgear can insert current transformer, includes casing (1), its characterized in that, the inside fixedly connected with spacer ring (2) of casing (1), the inboard of spacer ring (2) is provided with iron core (3) respectively and is located iron core (3) inboard first coil (4), the equal fixedly connected with in both ends of first coil (4) and casing (1) inside fixedly connected's inserted sheet (5), be provided with second coil (6) on iron core (3), the left end electricity of second coil (6) is connected with first wiring end (7) with casing (1) inside fixedly connected, bar hole (8) have been seted up in the outside of casing (1), the inside fixedly connected with equidistance of spacer ring (2) distributes and spheroid (9) of being connected with second coil (6) electricity, the inside swing joint in bar hole (8) has second wiring end (10), the outside fixedly connected with of second wiring end (10) is located inside stopper (11) of casing (1), the outside threaded connection of second wiring end (10) has locating ring (12) that is located the casing (1) outside, the inside swing joint of second wiring end (10) has conducting block (13) with spheroid (9) outside laminating, the one end that spheroid (9) were kept away from in conducting block (13) is provided with and is located spring (14) inside second wiring end (10).

2. The pluggable current transformer of the high-voltage switch cabinet according to claim 1, wherein a connecting block (15) is fixedly connected to the outer side of the housing (1), a mounting block (16) is fixedly connected to the bottom of the connecting block (15), and a bolt hole is formed in the top of the mounting block (16).

3. The pluggable current transformer of claim 2, characterized in that the inside of the separating ring (2) is filled with a filler (17), and the filler (17) is epoxy resin.

4. The pluggable current transformer of the high-voltage switch cabinet according to claim 3, characterized in that the first terminal (7) comprises a first terminal post (71) fixedly connected with the inside of the shell (1), and a first compression screw (72) is connected with the inner thread of the first terminal post (71).

5. The pluggable current transformer of claim 4, wherein two adjacent spheres (9) are electrically connected with adjacent turns on the second coil (6), and one side of the conductive block (13) is provided with a groove matched with the spheres (9).

6. The pluggable current transformer of the high-voltage switch cabinet according to claim 5, wherein the second terminal (10) comprises a second terminal (101) movably connected with the inside of the strip-shaped hole (8) and fixedly connected with the inside of the limiting block (11), and a second compression screw (102) is connected with the inside of the second terminal (101) in a threaded manner.

7. The pluggable current transformer of the high-voltage switch cabinet according to claim 6, wherein a threaded groove matched with the positioning ring (12) is formed in the outer side of the second terminal (101), a movable groove located on the outer side of the conductive block (13) is formed in the second terminal (101), the spring (14) is located in the movable groove, and an anti-slip pad closely attached to the outer side of the shell (1) is arranged on one side of the positioning ring (12).