CN218038829U

CN218038829U - Feed-through current transformer

Info

Publication number: CN218038829U
Application number: CN202222293365.0U
Authority: CN
Inventors: 朱海震
Original assignee: Jiangsu Misitu Electric Power Technology Co ltd
Current assignee: Jiangsu Misitu Electric Power Technology Co ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-12-13
Anticipated expiration: 2032-08-30

Abstract

The application belongs to the technical field of circuit components and parts, discloses a straight-through current transformer, including procapsid and back casing, procapsid and back casing pass through bolt-up and connect, be provided with the winding in the cavity that procapsid and back casing are constituteed, the upper end of procapsid and back casing is provided with two binding post, the both ends of winding are connected with two binding post respectively, procapsid and back casing bottom are provided with the recess, and the recess below is provided with and is used for fixing the sheet metal component on the distribution board, is provided with the boss on the sheet metal component, recess and boss cooperation. Through set up the boss on the sheet metal component, casing and back casing bottom set up the recess in the front, utilize the cooperation between recess and the boss, can slide into the formula installation, and the installation is swiftly convenient, does not need fasteners such as screw to fix, can realize quick installation, quick dismantlement.

Description

Feed-through current transformer

Technical Field

The utility model relates to a circuit components and parts technical field, in particular to punching current transformer.

Background

The current transformer is an instrument for converting a large primary side current into a small secondary side current to measure according to the electromagnetic induction principle, and consists of a closed iron core and a winding, wherein the primary side winding has few turns and is connected in series in a circuit of the current to be measured, so that all the current of the circuit always flows through the current transformer, the secondary side winding has more turns and is connected in series in a measuring instrument and a protection loop, and a secondary side loop of the current transformer is always closed when the current transformer works, so that the impedance of the series coil of the measuring instrument and the protection loop is very small, the working state of the current transformer is close to short circuit, the current transformer converts the large primary side current into the small secondary side current to measure, and the secondary side cannot be opened.

At present, in the existing plug-in low-voltage power distribution board, the current transformer measures the current value at the main loop. When the current condition of the shunt plug-in type circuit breaker needs to be measured, a shunt current transformer needs to be additionally arranged, and the position of the additionally arranged shunt current transformer is limited due to the influence of insufficient space of a distribution board, so that a series of problems that the shunt current transformer is inconvenient to install, inflexible and the like are caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a straight-through current transformer.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a straight-through current transformer, includes procapsid and back casing, procapsid and back casing pass through bolt-up connection, be provided with the winding in the cavity that procapsid and back casing are constituteed, the upper end of procapsid and back casing is provided with two binding post, the both ends of winding are connected with two binding post respectively, procapsid and back casing bottom are provided with the recess, and the recess below is provided with and is used for fixing the sheet metal component on the distribution board, is provided with the boss on the sheet metal component, recess and boss cooperation.

Through adopting above-mentioned technical scheme, through setting up the boss on the sheet metal component, casing and back casing bottom set up the recess in the front, utilize the cooperation between recess and the boss, can slide into the formula installation, the installation is swift convenient, does not need fasteners such as screw to fix, can realize quick installation, quick dismantlement.

Furthermore, through holes along the front and back trend are formed in the middle of the front shell and the middle of the back shell.

Through adopting above-mentioned technical scheme, casing and back casing middle part are seted up the through-hole in the front, can be used for putting the wire of bayonet circuit breaker secondary side along separate routes, and the wire of avoiding bayonet circuit breaker secondary side along separate routes drags in disorder, saves the panel space, keeps clean and tidy.

Further, the upper end of procapsid and back casing is provided with the shroud of lid on binding post, the shroud side is located binding post department and is provided with the breach.

Through adopting above-mentioned technical scheme, set up the shroud on binding post, shelter from the binding post, effectively prevent under the on-state mistake and touch the possibility of emergence accident.

Furthermore, the front side, the rear side and the outer side of the side edge of the cover cap, which are positioned on the wiring terminal, are provided with notches.

Through adopting above-mentioned technical scheme, all seted up the breach in the front side, the rear side and the outside that the shroud side lies in binding post for arbitrary breach entering can be followed to punching current transformer's wiring, alright select the mode of connection according to the arrangement form of difference, make the mode of connection diversified, wire winding phenomenon can not take place, and it is more convenient to work a telephone switchboard.

Furthermore, the middle part of the cover cap is connected with the upper end plates of the front shell and the rear shell through screws.

Through adopting above-mentioned technical scheme, fix the shroud on the upper end plate of procapsid, back casing through the screw, it is convenient to connect, also convenient to detach.

Further, be provided with 3 bosss on the sheet metal component, and 3 bosss are the article font and arrange.

Through adopting above-mentioned technical scheme, article font arranges 3 bosss on the sheet metal component, and a through current transformer is installed to every boss position, and three through current transformer corresponds the A of shunting plug-in circuit breaker respectively, B, C three-phase, and article font staggered arrangement can effectively utilize the space in the distribution board, and three through current transformer arranges closely after the installation, and whole occupation space is less.

Furthermore, the boss is integrally a T-shaped table, and the groove is integrally a T-shaped groove.

Through adopting above-mentioned technical scheme, cooperation between T shape platform and the T-slot is connected more firmly.

Further, four corners of the front shell and the rear shell are provided with bolts.

Through adopting above-mentioned technical scheme, all be provided with the bolt in four corners of casing and back casing in the front, it is inseparabler to be connected between procapsid and the back casing through four bolts.

To sum up, the utility model discloses following beneficial effect has:

1. in the application, the bosses are arranged on the sheet metal parts, the grooves are arranged at the bottoms of the front shell and the rear shell, and the slide-in type installation can be realized by utilizing the matching between the grooves and the bosses, so that the installation is quick and convenient, the fixation is not required by fasteners such as screws, and the quick installation and the quick disassembly can be realized;

2. according to the circuit breaker, the through holes are formed in the middle of the front shell and the middle of the rear shell, so that the circuit breaker can be used for placing the wires of the secondary side of the shunt plug-in circuit breaker, the wires of the secondary side of the shunt plug-in circuit breaker are prevented from being dragged and disordered, the space of a distribution panel is effectively saved, and the cleanness is kept;

3. in the application, the cover cap is arranged on the wiring terminal to shield the wiring terminal, so that the possibility of accident caused by mistaken touch in a power-on state is effectively prevented; notches are formed in the side edges of the cover cap at the front side, the rear side and the outer side of the connecting terminal, so that the wiring of the straight-through current transformer can enter from any notch, the wiring mode can be selected according to different arrangement modes, the wiring mode is diversified, the winding phenomenon cannot occur, and the wiring is more convenient;

4. in this application, through the article font on the sheet metal component and arrange 3 bosss, a through current transformer of every boss position installation, three through current transformer corresponds the A of along separate routes plug-in circuit breaker, B, C three-phase respectively, and article font staggered arrangement can effectively utilize the space in the distribution board, and three through current transformer arranges closely after the installation, and whole occupation space is less.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view (part) of the power distribution board according to the embodiment of the present invention;

fig. 3 is a schematic structural view of the embodiment of the present invention after being mounted on a sheet metal part;

fig. 4 is a schematic structural diagram of a sheet metal part according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of an embodiment of the invention.

In the figure: 1. a sheet metal part; 2. a boss; 11. a front housing; 12. a rear housing; 13. a bolt; 20. a winding; 30. a wiring terminal; 40. a groove; 50. a through hole; 60. a cover; 61. a notch; 62. and (4) a screw.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; it is obvious that the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.

As shown in fig. 1 to 5, the embodiment of the present application discloses a feedthrough current transformer, which includes a front case 11 and a rear case 12, where the front case 11 and the rear case 12 are fastened together by bolts 13 to form an entire case, and a cavity is formed inside. Specifically, four corners of the front housing 11 and the rear housing 12 are respectively provided with a connecting hole, and each connecting hole is connected by a bolt 13, so that the front housing 11 and the rear housing 12 are tightly connected together under the action of 4 bolts 13 and are not easy to separate. When the front shell 11 and the rear shell 12 are installed, the front shell and the rear shell are clamped together and screwed down by the bolts 13; when the front shell 11 and the rear shell 12 need to be disassembled, the front shell 11 and the rear shell 12 can be separated only by unscrewing the bolts 13, and the disassembly and the assembly are convenient.

A winding 20 is arranged in a cavity formed by the front shell 11 and the rear shell 12, the winding 20 comprises an iron core and a coil wound on the iron core, and the iron core is made by rolling a silicon steel sheet and plays a role of a primary winding; the coil is directly and uniformly wound on the iron core and plays the role of secondary winding.

Two wiring terminals 30 are arranged at the upper ends of the front shell 11 and the rear shell 12, one ends of the wiring terminals 30 protrude out of the front shell 11 and the rear shell 12 for leading out the secondary winding to be connected to the electric instrument, and the other ends of the wiring terminals 30 extend into the front shell 11 and the rear shell 12 to be respectively connected with two ends of the winding 20 to form a loop. In this way, under the fastening connection between the front shell 11 and the rear shell 12, the windings 20 are completely enclosed in the cavities of the front shell 11 and the rear shell 12 and are not exposed.

The upper ends of the front case 11 and the rear case 12 are further provided with a cover 60, and the cover 60 is covered on the connection terminal 30 and connected to the upper end plates of the front case 11 and the rear case 12 by screws 62. The cover 60 is used to shield the terminal 30, so as to effectively prevent the accident caused by the mistaken contact in the power-on state.

Specifically, it is provided with breach 61 to be located binding post 30 department at shroud 60 side, breach 61 is located binding post 30's front side, rear side and outside, every binding post 30 department is provided with four breach 61 promptly, breach 61 mainly used leaves the space and lets the electric wire that binding post 30 draws connect to the electric power instrument, and in binding post 30's front side, rear side and outside all set up breach 61, can make the electric wire that this straight-through current transformer secondary winding draws can follow binding post 30's front side, rear side or outside are drawn, binding post 30's mode of connection is diversified, can follow the equidirectional wiring, thereby more can adapt to on-the-spot actual environment in narrow space, make the wiring very convenient, in a flexible way, can not cause the wiring difficulty because of straight-through current transformer's mounting means.

Through holes 50 along the front and back trend are formed in the middle of the front shell 11 and the back shell 12, wires penetrating the secondary side of the shunt plug-in circuit breaker are arranged in the through holes 50, large current on the primary side is induced to be converted into small current on the secondary side, the power monitoring effect is achieved, in addition, the situation that the wires on the secondary side of the shunt plug-in circuit breaker are dragged and hung in disorder can be avoided, the space of a distribution board is saved, and the neatness is kept.

The feed-through current transformer of this embodiment is still including supporting sheet metal component 1 that uses, and sheet metal component 1 is used for fixing on the distribution board, is provided with 3 bosss 2 on the sheet metal component 1, and 3 bosss 2 are the article font and arrange, and boss 2 wholly is T shape platform.

The bottom of the front shell 11 and the bottom of the rear shell 12 are provided with grooves 40, the whole grooves 40 are T-shaped grooves, the in-groove outlines of the grooves 40 are consistent with the outline of the boss 2, during installation, the grooves 40 at the bottom of the front shell 11 and the bottom of the rear shell 12 only need to be slid into the boss 2, connection between the front shell rear shell and the sheet metal part 1 can be achieved, connection is convenient, other fixing pieces such as screws are not needed, and installation and disassembly are very simple.

The use principle of a straight-through current transformer in this embodiment is: firstly, the sheet metal part 1 is screwed on a distribution board through a screw, then, the through type current transformer is arranged on a boss 2 on the sheet metal part 1, 3 through type current transformers can be specifically arranged, the through type current transformers correspond to the three phases A, B and C of the shunt insertion type circuit breaker respectively, the wires of the three phases A, B and C on the secondary side of the insertion type circuit breaker penetrate through holes 50 of the through type current transformers and are connected to electric equipment, and secondary wiring terminals 30 of the 3 through type current transformers are connected to an electric instrument and used for monitoring electric energy data of the shunt electric equipment.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A straight-through current transformer is characterized in that: including procapsid (11) and back casing (12), procapsid (11) and back casing (12) are through bolt (13) fastening connection, be provided with winding (20) in the cavity that procapsid (11) and back casing (12) are constituteed, the upper end of procapsid (11) and back casing (12) is provided with two binding post (30), the both ends of winding (20) are connected with two binding post (30) respectively, procapsid (11) and back casing (12) bottom are provided with recess (40), and recess (40) below is provided with and is used for fixing sheet metal component (1) on the distribution board, is provided with boss (2) on sheet metal component (1), and recess (40) and boss (2) cooperation.

2. The feed-through current transformer of claim 1, wherein: through holes (50) which move forward and backward are formed in the middle of the front shell (11) and the middle of the rear shell (12).

3. The feed-through current transformer of claim 1, wherein: the upper end of procapsid (11) and back casing (12) is provided with shroud (60) of lid on binding post (30), shroud (60) side is located binding post (30) department and is provided with breach (61).

4. A feedthrough current transformer as claimed in claim 3, wherein: the side edge of the cover cap (60) is positioned at the front side, the rear side and the outer side of the wiring terminal (30) and is provided with a notch (61).

5. A feedthrough current transformer as claimed in claim 3, wherein: the middle part of the cover cap (60) is connected with the upper end plates of the front shell (11) and the rear shell (12) through screws (62).

6. The feed-through current transformer of claim 1, wherein: be provided with 3 boss (2) on sheet metal component (1), and 3 boss (2) are the article font and arrange.

7. The feed-through current transformer of claim 6, wherein: the boss (2) is integrally a T-shaped table, and the groove (40) is integrally a T-shaped groove.

8. The feed-through current transformer of claim 1, wherein: bolts (13) are arranged at four corners of the front shell (11) and the rear shell (12).