High-capacity zero-sequence current transformer

Abstract

The utility model discloses a high-capacity zero sequence current transformer, which comprises a vertically arranged and annular main body mechanism, the main body mechanism comprises a vertically arranged and hollow annular shell, an annular winding which is coaxial with the annular shell and is annular is arranged in the annular shell, and epoxy resin is filled in a cavity between the annular winding and the annular shell. The bottom ends of the surfaces of the two sides of the main body mechanism are vertically and fixedly connected with connecting pieces, and the bottom ends of the two connecting pieces are transversely bent and extend towards the two sides respectively. According to the high-capacity zero-sequence current transformer, the main body mechanism is arranged, the high-quality silicon steel sheet roll iron core and the multi-strand electromagnetic wire winding are adopted, the flame-retardant plastic PVC shell is adopted to replace an original hard mold, low-temperature-resistant epoxy resin pouring sealant is adopted as a main insulating material, the productivity is not limited by the number of molds, and the production efficiency is improved. Product performance is excellent, and meanwhile appearance is qualitatively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to current transformer technical field, concretely is a kind of large-capacity zero sequence current transformer. BACKGROUND

[0002] Current transformer is the instrument that once side big current is converted into secondary side small current to measure according to electromagnetic induction principle.Current transformer is composed of closed core and winding.It is few in the turns of primary winding, and is connected in the current line that needs to be measured.

[0003] The original aperture 120mm zero sequence current transformer capacity is small and precision is poor 150 / 5-5VA-10P10, cannot satisfy the requirement of 150 / 5-15VA-5P10 of opening and closing, and production and manufacture adopt hard mold unsaturated epoxy resin casting forming, easy to crack and not suitable for low temperature working condition. UTILITY MODEL CONTENTS

[0004] In view of the deficiency of prior art, the utility model provides a kind of large-capacity zero sequence current transformer, solve the original aperture 120mm zero sequence current transformer capacity is small and precision is poor 150 / 5-5VA-10P10, cannot satisfy the requirement of 150 / 5-15VA-5P10 of opening and closing, and production and manufacture adopt hard mold unsaturated epoxy resin casting forming, easy to crack and not suitable for low temperature working condition problem.

[0005] To realize above-mentioned purpose, the utility model is realized by following technical scheme: a kind of large-capacity zero sequence current transformer, including vertically arranged and annular main body mechanism, the main body mechanism includes vertically arranged and internally hollow annular shell, the inside of the annular shell is provided with annular winding coaxial with it and is annular, the cavity between the annular winding and the annular shell is filled with epoxy resin.

[0006] Further, the bottom end of the surface of the both sides of the main body mechanism is vertically fixedly connected with connecting piece, and the bottom end of the two connecting pieces is horizontally bent and extends to both sides respectively.

[0007] Further, the both sides of the upper surface of the horizontal bending part of the two connecting pieces are vertically provided with mounting hole.

[0008] Further, the top end of the plurality of mounting holes is expanded to form a sink.

[0009] Further, the outer surface of the main body mechanism is provided with wiring terminal.

[0010] Further, the core material of the annular winding is silicon steel sheet, and the annular shell is PVC material.

[0011] Compared with the prior art, the large-capacity zero sequence current transformer has the advantages that the device adopts high-quality silicon steel sheet roll cores, multi-strand electromagnetic wire windings, and a flame-retardant plastic PVC shell instead of the original hard mold mold, the main insulation material also adopts low-temperature resistant epoxy resin pouring sealant, the production capacity is not limited by the number of molds, and the product performance is excellent while the appearance is also improved in quality. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a part of the sectional view structure schematic diagram of the utility model;

[0013] Fig. 2 It is a top view structure schematic diagram of the utility model;

[0014] Fig. 3 It is a side view structure schematic diagram of the utility model.

[0015] In the drawing: 1 - main mechanism, 11 - annular shell, 12 - annular winding, 13 - epoxy resin, 2 - connecting sheet, 3 - mounting hole, 4 - sink groove, 5 - wiring end. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0017] Please refer to Figs. 1-3 The utility model provides a kind of technical scheme: a large-capacity zero sequence current transformer, including vertically arranged and annular main mechanism 1, main mechanism 1 includes vertically arranged and internally hollow annular shell 11, the inside of annular shell 11 is provided with annular winding 12 coaxially with it and is annular, the cavity between annular winding 12 and annular shell 11 is filled with epoxy resin 13.

[0018] The core material of annular winding 12 is silicon steel sheet, and annular shell 11 is made of PVC.

[0019] The device adopts high-quality silicon steel sheet roll cores, multi-strand electromagnetic wire windings, and a flame-retardant plastic PVC shell 11 instead of the original hard mold mold, the main insulation material also adopts low-temperature resistant epoxy resin pouring sealant, the production capacity is not limited by the number of molds, and the product performance is excellent while the appearance is also improved in quality.

[0020] The bottom end of the surface of the two sides of the main body mechanism 1 is vertically fixedly connected with a connecting sheet 2, the bottom end of the two connecting sheets 2 is horizontally bent and respectively extends to the two sides.

[0021] The upper surface of the horizontally bent part of the two connecting sheets 2 is vertically provided with a mounting hole 3.

[0022] The two connecting sheets 2 are used for fixing the device, when the device needs to be fixed and installed, a screw is used to pass through the mounting hole 3 on the two connecting sheets 2 and is screwed.

[0023] The top end of the plurality of mounting holes 3 is outwardly expanded to form a sink 4.

[0024] The sink 4 can prevent the nut of the screw from protruding from the surface of the connecting sheet 2 after being screwed, and improve the aesthetic appearance.

[0025] The outer surface of the main body mechanism 1 is provided with a wiring terminal 5.

[0026] The wiring terminal 5 is provided with two, which is the prior art of the current transformer, and will not be described here.

[0027] The device adopts high-quality silicon steel sheet roll core, multi-strand electromagnetic wire winding, and adopts a ring-shaped shell 11 of flame-retardant plastic PVC instead of the original hard mold mold, and the main insulation material also adopts low-temperature resistant epoxy resin pouring sealant, the production capacity is not limited by the number of molds, and the product performance is excellent while the appearance is also improved in quality.

[0028] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or apparatus.

[0029] The above only describes the preferred embodiments of the present application, and does not limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-capacity zero-sequence current transformer, characterized in that: The main body (1) is arranged vertically and is circular. The main body (1) includes a vertically arranged and hollow annular shell (11). An annular winding (12) is arranged coaxially and circularly inside the annular shell (11). The cavity between the annular winding (12) and the annular shell (11) is filled with epoxy resin (13).

2. A high-capacity zero-sequence current transformer according to claim 1, characterized in that: The bottom ends of both sides of the main body (1) are vertically fixed with connecting pieces (2), and the bottom ends of the two connecting pieces (2) are bent laterally and extended to both sides respectively.

3. A high-capacity zero-sequence current transformer according to claim 2, characterized in that: The two connecting pieces (2) have vertically through mounting holes (3) on both sides of the upper surface of the laterally bent portion.

4. A high-capacity zero-sequence current transformer according to claim 3, characterized in that: The top ends of the plurality of mounting holes (3) are all expanded outward to form a recess (4).

5. A high-capacity zero-sequence current transformer according to claim 1, characterized in that: The outer surface of the main body (1) is provided with a wiring terminal (5).

6. A high-capacity zero-sequence current transformer according to claim 1, characterized in that: The core material of the annular winding (12) is silicon steel sheet, and the annular outer shell (11) is made of PVC.

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