CN210006582U - open-type residual current transformer connecting structure - Google Patents

Abstract

The utility model discloses an open-type residual current transformer connection structure, including the upper semicircle ring body and the lower semicircle ring body of symmetrical structure, upper semicircle ring body and lower semicircle ring body pass through fixed screw connection, upper semicircle ring body includes the casing, the casing is inside to be fixed and is equipped with the iron core, the winding has the coil on the iron core, casing both ends inner wall is connected with the wiring metalwork respectively, the left end stub of coil is connected with the left end wiring metalwork electricity in the casing inside, casing both ends outer wall is connected with the lug respectively, all open the screw hole on every lug, the casing top is connected with output terminal, the right end stub of coil is connected with output terminal input electricity, the right end wiring metalwork in the casing is connected with output terminal input electricity, open-type structure current transformer can not dismantle the cable when the installation, directly block on the cable, after having added the strengthening rib on the corresponding casing from top to bottom, make current transformer's bearing capacity reinforcing, there is not connecting wire fracture.

Description

open-type residual current transformer connecting structure

Technical Field

The utility model belongs to the technical field of current transformer, concretely relates to open-type residual current transformer connection structure.

Background

The open type residual current transformer belongs to types of current transformers, the open type current transformer is equipment for converting voltage or current according to proportion, the transformer has the function of converting high voltage or large current into standard low voltage (100V) or standard small current (5A or 10A, both refer to rated values) according to proportion so as to realize standardization and miniaturization of a measuring instrument, a protection device and an automatic control device, the transformer can also be used for separating a high voltage system to ensure the safety of people and equipment, the large difference between the current voltage and the small voltage in a power supply and power utilization line is from a few amperes to tens of thousands of amperes, a fault circuit is cut off by providing a signal to a relay device so as to be convenient for the measurement of a secondary instrument to be converted into the current of a comparison system , the voltage on the line is very dangerous if the direct measurement is high, the current transformer plays a role in current transformation and electrical isolation, the protection current transformer is mainly matched with the relay device, when the fault of short circuit, overload and the like occurs, the fault circuit is provided with the relay device, so as to protect the safety of the micro current transformer, the power supply system, the working conditions of the micro current transformer are completely different from the measuring transformer, the measuring and the measuring current transformer are completely different from the measuring, the measuring current transformer, the measuring and the measuring instrument, the measuring load protecting device, the protecting device is only when the protective device is more than the normal current rating of the rated current transformer, the rated current rating of the power supply system, the power grid, the power supply system, the power transformer is more than the rated current rating of the power transformer, the power transformer is more than the rated protection, the rated protection device is more than the rated protection device, the rated current rating of the rated protection device, the rated protection device is more than the rated current rating of the power protection device, the rated protection device is more than the power protection device, the power protection device is more than the rated current rating of.

The current transformer is times equipment which is important for an electric power system, and the principle of the current transformer is manufactured according to the electromagnetic induction principle, the open type current transformer can solve the problem that a closed type current transformer needs to be sleeved from a end of a measured cable when being installed.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides an kinds of open-type residual current transformer connection structure to staple bolt area fixed connection can make about the contact of iron core inseparable among the solution prior art, and make the cracked problem of coil of drawing forth easily.

In order to achieve the purpose, the utility model provides an open-type residual current transformer connection structure, including upper semicircle ring body and lower semicircle ring body that the structure is symmetrical, upper semicircle ring body and lower semicircle ring body pass through fixed screw connection, upper semicircle ring body includes the casing, the casing is inside to be fixed and is equipped with the iron core, twine the coil on the iron core, casing both ends inner wall is connected with the wiring metalwork respectively, the left end terminal of coil is connected with the left end terminal wiring metalwork electricity in the casing, casing both ends outer wall is connected with the lug respectively, all open screw hole on each lug, the casing top is connected with output terminal, the right end terminal of coil is connected with the output terminal input electricity, the right end terminal wiring metalwork in the casing is connected with the output terminal input electricity.

, the shell has a semicircular structure.

, the iron core is in a semi-circle structure.

, the bottom of the iron core is flush with the bottom of the shell.

, the upper semi-circular body further comprises a reinforcing rib vertically arranged at the bottom of the lug, a through hole penetrating through the top and the bottom is formed in the reinforcing rib, the reinforcing rib is communicated with the screw hole, and the fixing screw is matched with the through hole in an inserting mode.

Step , the bottom of the ribs is flush with the bottom of the housing.

And , the coil is an enameled wire coil.

, the bottom of the shell of the lower semi-circle body is fixedly connected with a base.

And , the lower half part of the base is of a square structure, and the upper half part of the base is of a cylinder structure.

Step , the diameter of the middle portion of the upper half of the base is smaller than the top and bottom diameters.

The utility model has the advantages of as follows: when the open type structure is installed, the cable can not be detached from the current transformer, the cable is directly clamped on the cable, the shells of the two metal connecting pieces which correspond from top to bottom are provided with reinforcing ribs, the bearing capacity of the current transformer is enhanced, the hidden danger of breakage of a connecting wire can not exist, meanwhile, the iron core is fixed by using fixing screws on two sides, the iron core is firmly contacted with the iron core from top to bottom, the two ends of the iron core are contacted with each other more stably, the effect of balance is better ensured, the upper iron core and the lower iron core are respectively wound.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic cross-sectional structural diagram of kinds of open-type residual current transformer connection structures provided by the embodiment of the present invention;

fig. 2 is a schematic structural diagram of kinds of open-type residual current transformer connection structures provided by the embodiment of the present invention after the fixing screws are removed.

In the figure: fixing screw 10, casing 2, iron core 5, coil 6, wiring metal fitting 4, lug 3, screw hole 8, output terminal 7, base 1, strengthening rib 9.

Detailed Description

The technical solution of the present invention will be described more clearly and completely with reference to the accompanying drawings and detailed description, but those skilled in the art will understand that the following described embodiments are partial embodiments of the present invention , rather than the whole embodiments, and are only used for illustrating the present invention and should not be considered as limiting the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" shall be construed , for example, they may be fixedly connected, detachably connected, or physically connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, and communicating between two elements.

Example 1

The open-type residual current transformer connection structures provided by embodiment 1 of the utility model are shown in fig. 1 and fig. 2, the connection structures comprise an upper semicircular ring body and a lower semicircular ring body which are symmetrical in structure, the upper semicircular ring body and the lower semicircular ring body are connected through a fixing screw 10, the upper semicircular ring body comprises a shell 2, an iron core 5 is fixedly arranged inside the shell 2, a coil 6 is wound on the iron core 5, the inner walls of two ends of the shell 2 are respectively connected with a wiring metal piece 4, two ends of the coil 6 are respectively electrically connected with the wiring metal pieces 4 on the inner walls of two ends of the shell, the outer walls of two ends of the shell 2 are respectively connected with lugs 3, each lug 3 is provided with a screw hole 8, the top of the shell 2 is connected with an output terminal 7, the output terminal 7 is electrically connected with the wiring metal piece 4, the left end of the coil is electrically connected with the left end wiring metal piece inside the shell, the outer walls of two ends of the shell are respectively connected with lugs, each lug is provided with a screw hole, the top of the shell.

It should be noted that the two ends of the coil in the lower semicircular ring body are respectively and internally connected with two metal binding posts in the first semicircular ring body correspondingly, and when the upper semicircular ring body and the lower semicircular ring body are attached, the contacts of the two wiring metal pieces 4 in the upper semicircular ring body are contacted with the two wiring metal contacts in the lower semicircular ring body.

During the use, open-type structure current transformer can not dismantle the cable when installation, and direct card is on the cable, and after the lug bottom that corresponds from top to bottom has added the strengthening rib, makes current transformer's bearing capacity reinforcing, can not have connecting wire fracture hidden danger, and the iron core both sides use fixed screw to be fixed simultaneously, and the iron core contact is firm inseparable about making, and both ends contact is more stable, guarantees that the equilibrium effect is better, and upper portion iron core and lower part iron core twine respectively has the wire, make both ends connect more reliably.

It should be noted that the shell 2 is of a semicircular structure, the iron core 5 is of a semicircular structure, and the iron core is installed inside the shell by adopting a traditional fixing method, such as glue pouring and fixing, and the like, which is not described herein, the bottom of the iron core 5 is flush with the bottom of the shell 2, so that the joint of the upper semicircular body and the lower semicircular body can be tightly attached, and the upper semicircular body further comprises a reinforcing rib 9 vertically arranged at the bottom of the lug 3, so that the stability is enhanced; the reinforcing ribs 9 are provided with through holes penetrating through the top and the bottom; the reinforcing ribs 9 are communicated with the screw holes 8; fixed screw 10 matches with the through-hole is pegged graft, and 9 bottoms of strengthening rib and 2 bottom parallel and levels of casing, coil 6 are enameled wire coil, and the casing bottom fixedly connected with base 1 of lower semicircle ring body, base 1 the latter half are the cube structure, and base 1 the first half is the cylinder structure, and the middle part diameter of base 1 the first half is less than top and bottom diameter.

The iron core can be completely separated when the sensor is used and installed, so that a wire can easily enter the iron core ring, the sensor comprises two parts, namely, an upper iron core and a lower iron core, an enameled wire with fixed turns is wound on the upper iron core and the lower iron core, the upper enameled wire and the wire are connected to serve as a signal output end, two ends of the enameled wire are connected with a connecting piece in a welding mode, the upper connecting piece and the lower connecting piece are connected through fixing screws, the mode not only ensures the tight connection of the two semicircular iron cores, a complete magnetic circuit of the iron core of the transformer is formed, but also an upper coil and a lower coil are communicated.

The upper iron core and the lower iron core are fixed on the base. The base is provided with a mounting hole for mounting the current transformer, the fixing screws on two sides of the open type residual current transformer are removed, the upper iron core and the lower iron core can be completely separated, and a loop formed when the tested cable can be closed through the upper iron core and the lower iron core under various scenes is more convenient to use.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims (10)

1. The connecting structure of the open-type residual current transformers is characterized by comprising an upper semicircular ring body and a lower semicircular ring body which are symmetrical in structure, wherein the upper semicircular ring body and the lower semicircular ring body are connected through fixing screws, the upper semicircular ring body comprises a shell, an iron core is fixedly arranged in the shell, a coil is wound on the iron core, wiring metal pieces are connected to the inner walls of the two ends of the shell respectively, the left end wire head of the coil is electrically connected with the left end wiring metal piece in the shell, the outer walls of the two ends of the shell are connected with lugs respectively, each lug is provided with a screw hole, an output terminal is connected to the top of the shell, the right end wire head of the coil is electrically connected with the input end of the output terminal, and the right end wiring metal piece in.
2. 2. The connection structure of any one of claims, wherein the housing is a semi-circular ring.
3. 3. The connection structure of any one of claims, wherein the iron core is a semi-circular ring.
4. 4. The connection structure of any one of claims 1, wherein the bottom of the iron core is flush with the bottom of the case.
5. 5. The connection structures of open-type residual current transformers according to claim 1, wherein the upper semi-circular body further comprises a reinforcing rib vertically arranged at the bottom of the lug, through holes penetrating the top and the bottom are formed in the reinforcing rib, the reinforcing rib is communicated with the screw holes, and the fixing screws are matched with the through holes in an inserted mode.
6. 6. The connection structure of any one of claims 5, wherein the bottom of the stiffener is flush with the bottom of the case.
7. 7. The kinds of open-type residual current transformer connection structure of claim 1, wherein the coil is a wire coil.
8. 8. The kinds of open-type residual current transformer connection structure of claim 1, wherein a base is fixedly connected to the bottom of the shell of the lower semi-circular ring body.
9. 9. The connection structure of an on-off type residual current transformer, wherein the lower half of the base is a square structure and the upper half of the base is a cylinder structure.
10. 10. The connection structure of any one of claims 9, wherein the diameter of the middle part of the upper half of the base is smaller than the top and bottom diameters.

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