CN221079794U - Current transformer for multi-turn power distribution terminal - Google Patents

Abstract

The utility model relates to the technical field of current transformers, in particular to a current transformer for a multi-turn power distribution terminal, which comprises a shell, a secondary coil, a primary winding, a primary guide post and a secondary stitch, wherein one end of the shell is open, the primary winding is arranged on the secondary coil, the primary guide post penetrates through the secondary coil, the secondary stitch is arranged on the shell, the primary winding is wound on the secondary coil, the primary guide post penetrates through the middle part of the secondary coil, the starting end and the tail end of the primary winding and the primary guide post extend out of the shell, and the starting end and the tail end of the secondary coil are respectively connected with the secondary stitch. The structure integrates two or more primary windings into one transformer, realizes different turn ratios, can simplify subsequent circuit design, reduces material types, reduces overall cost and is convenient for production.

Description

Current transformer for multi-turn power distribution terminal

Technical Field

The utility model relates to the technical field of current transformers, in particular to a current transformer for a multi-turn power distribution terminal.

Background

At present, the primary winding of the traditional transformer is only one, the turn ratio is fixed, a plurality of different transformers are needed to be used for measuring different currents for a power distribution terminal, different PCB boards and circuit schemes are needed to be designed for the rear end, materials are more, production is complicated, and the overall cost is high.

Disclosure of utility model

In order to solve the problems, the utility model provides the current transformer for the multi-turn ratio distribution terminal, which integrates two or more primary windings into one transformer to realize different turn ratios, can simplify the subsequent circuit design, reduce the material types, reduce the overall cost and facilitate the production.

The technical scheme includes that the current transformer for the multi-turn ratio power distribution terminal comprises a shell, a secondary coil, a primary winding, a primary guide post and secondary pins, wherein one end of the shell is open, the secondary coil is arranged in the shell, the primary winding is arranged on the secondary coil, the primary guide post penetrates through the secondary coil, the secondary pin is arranged on the shell, the primary winding is wound on the secondary coil, the primary guide post penetrates through the middle of the secondary coil, the starting end and the tail end of the primary winding and the primary guide post extend out of the shell, and the starting end and the tail end of the secondary coil are connected with the secondary pins respectively.

The primary winding is provided with a plurality of winding turns which are different or the same.

The upper cover of the shell opening is provided with a cover plate, the cover plate is provided with a plurality of fixing holes, the primary winding and the starting end and the tail end of the primary guide post are respectively clamped into the fixing holes and extend out of the shell, and the secondary pins are respectively clamped into the fixing holes.

The cover plate is provided with a reinforcing clamping column towards the position corresponding to the fixing hole on the end face in the shell, the reinforcing clamping column is provided with a fastening hole corresponding to the fixing hole, the starting end and the tail end of the primary winding and the primary guide post are clamped into the fastening hole and the fixing hole at the same time, and the secondary stitch is clamped into the fastening hole and the fixing hole at the same time.

The casing is U type structure, the apron middle part is provided with the filling opening, fixed orifices equipartition is around the filling opening.

The beneficial effects of the utility model are as follows:

1. Two or more primary windings are integrated into one transformer, so that one transformer replaces a plurality of single-turn ratio transformers, the production efficiency can be effectively improved, the cost is reduced, and the application range is wide.

2. The inside design of apron has the location to strengthen the card post, and the equipartition is arranged, makes the apron outer terminal surface remain level, guarantees the accuracy of each winding position and size, has guaranteed the electric insulation distance between each winding, helps improving electric insulation ability, further strengthens the position of fixed orifices on the apron simultaneously, improves apron intensity, avoids apron atress fracture.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the inside of the present utility model;

fig. 3 is a schematic structural view of the cover plate of the present utility model.

In the drawing, 1, a shell, 2, a secondary coil, 3, a primary winding, 4, a primary guide post, 5, a secondary stitch, 6, a cover plate, 7, a fixing hole, 8, a reinforcing clamping post, 9 and a pouring opening.

Detailed Description

As shown in fig. 1-3, the utility model provides a current transformer for a multi-turn ratio distribution terminal, which comprises a shell 1 with an opening at one end, a secondary coil 2 arranged in the shell 1, a primary winding 3 arranged on the secondary coil 2, a primary guide post 4 penetrating through the secondary coil 2 and a secondary pin 5 arranged on the shell 1, wherein the primary winding 3 is wound on the secondary coil 2, the primary guide post 4 penetrates through the middle part of the secondary coil 2, the starting end and the tail end of the primary winding 3 and the primary guide post 4 extend out of the shell 1, and the starting end and the tail end of the secondary coil 2 are respectively connected with the secondary pin 5.

The secondary coil 2, the primary winding 3 and the primary guide post 4 are all wrapped by insulating materials or are separated by insulating layers, the primary winding 3 and the primary guide post 4 without turns are integrated on one secondary coil 2, so that one transformer replaces a plurality of single turn ratio transformers, the inside of the shell 1 is filled and packaged by resin, the 5kV electric insulation voltage resistance among the windings can be met, the use safety of products is ensured, the application range is greatly improved, the production cost and the use cost are reduced,

As shown in fig. 2, the primary winding 3 is provided with a plurality of winding turns different or the same.

The primary winding 3 can be wound with a plurality of different turns according to the actual user demands, so that the application range is further improved, and the production cost and the use cost are reduced.

As shown in fig. 1-3, the opening of the housing 1 is covered with a cover plate 6, the cover plate 6 is provided with a plurality of fixing holes 7, the starting end and the tail end of the primary winding 3 and the primary guide post 4 are respectively clamped into the fixing holes 7 and extend out of the housing 1, and the secondary pins 5 are respectively clamped into the fixing holes 7.

The cover plate 6 is covered on the opening of the shell 1 to seal the opening of the shell 1, and the primary winding 3, the extending end of the primary guide post 4 and the secondary pins 5 are clamped into the fixing holes 7 on the cover plate 6, so that clamping and positioning are realized, and the production and the assembly are convenient.

As shown in fig. 1-3, a reinforcing clamping column 8 is arranged on the end face, facing the inside of the shell 1, of the cover plate 6 and corresponds to the fixing hole 7, a fastening hole corresponding to the fixing hole 7 is arranged on the reinforcing clamping column 8, the primary winding 3 and the starting end and the tail end of the primary guide column 4 are clamped into the fastening hole and the fixing hole 7 at the same time, and the secondary pins 5 are clamped into the fastening hole and the fixing hole 7 at the same time.

The reinforcing clamping column 8 further reinforces the position of the fixing hole 7 on the cover plate 6, improves the strength of the cover plate, further clamps the primary winding 3, the primary guide post 4 and the secondary stitch 5, avoids the stress cracking of the cover plate,

As shown in fig. 3, the housing 1 has a U-shaped structure, a filling opening 9 is provided in the middle of the cover plate 6, and the fixing holes 7 are uniformly distributed around the filling opening 9.

The shell 1 of U type structure can reduce the transformer volume, and pouring into mouth 9 and conveniently carry out resin filling encapsulation to the transformer, and pouring into mouth 9 simultaneously offer at the middle part, can avoid resin to follow shell 1 border overflow, and fixed orifices 7 equipartition is around pouring into mouth 9, can guarantee the accuracy of each winding position and size on the one hand, guarantees the electric insulation distance between each winding on the other hand, helps improving electric insulation ability.

Claims (5)

1. The utility model provides a multiturn compares current transformer for distribution terminal which characterized in that: including one end open-ended casing (1), secondary coil (2) of setting in casing (1), set up primary winding (3) on secondary coil (2), pass primary guide pillar (4) of secondary coil (2) and set up secondary stitch (5) on casing (1), primary winding (3) coiling is on secondary coil (2), primary guide pillar (4) pass from secondary coil (2) middle part, outside casing (1) are all stretched out to the starting end and the end of primary winding (3) and primary guide pillar (4), the starting end and the end of secondary coil (2) are connected with secondary stitch (5) respectively.

2. The current transformer for a multi-turn power distribution terminal according to claim 1, wherein: the primary winding (3) is provided with a plurality of winding turns which are different or the same.

3. The current transformer for a multi-turn power distribution terminal according to claim 1, wherein: the utility model discloses a motor, including casing (1), secondary stitch, casing (1), apron (1) upper cover has, be provided with apron (6) on the opening of casing (1), be provided with a plurality of fixed orificess (7) on apron (6), in fixed orificess (7) are all gone into respectively to card respectively to the initiating terminal and the end of primary guide pillar (4) and are stretched out outside casing (1), in fixed orificess (7) are gone into respectively to secondary stitch (5).

4. A current transformer for a multi-turn electrical terminal according to claim 3, wherein: the utility model discloses a motor, including casing (1), apron (6), secondary stitch (5), fixed orifices (7) are all gone into to the initial end of primary winding (3), primary guide pillar (4) and end in clamping fastening hole, fixed orifices (7) simultaneously, be provided with on the terminal surface in casing (1) with fixed orifices (7) corresponding position and strengthen card post (8), be provided with on the strengthening card post (8) with the fixed orifices (7) corresponding fastening hole, secondary stitch (4) initial end and end all card simultaneously in fastening hole, fixed orifices (7).

5. A current transformer for a multi-turn electrical terminal according to claim 3, wherein: the casing (1) is U type structure, apron (6) middle part is provided with filling opening (9), fixed orifices (7) equipartition is around filling opening (9).