CN210956351U

CN210956351U - Indoor three-phase fusing type voltage transformer

Info

Publication number: CN210956351U
Application number: CN201922202857.2U
Authority: CN
Inventors: 赵光景
Original assignee: Nanchang Shunjing Technology Co ltd
Current assignee: Nanchang Shunjing Technology Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-07-07
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses an indoor three-phase fusing type voltage transformer in the technical field of electrical equipment, which comprises an oil expander, a porcelain box and a base, wherein the top of the oil expander is provided with a breather through a bolt, the left side wall of the oil expander is provided with a first wiring end through a bolt, the porcelain box is arranged at the bottom of the oil expander through a bolt, the outer side wall of the porcelain box is provided with a porcelain ring, the bottom of the inner cavity of the porcelain box is provided with a plurality of supporting bakelite plates, and the outer side wall of each supporting bakelite plate is provided with an iron core through a bolt; this indoor three-phase fusing voltage transformer's setting, structural design is reasonable, installs unshakable in one's determination at the lateral wall that supports the bakelite plate, adds on two iron core posts and establishes the balanced winding that concatenates that the number of turns is the same, polarity is opposite, balanced current appears under unbalanced magnetic flux, makes the iron core go up the post and demagnetize, and the lower post magnetizes, reaches the magnetic flux basic balance in the two posts automatically to improve the degree of accuracy that the mutual-inductor used.

Description

Indoor three-phase fusing type voltage transformer

Technical Field

The utility model relates to an electrical equipment technical field specifically is an indoor three-phase fusing type voltage transformer.

Background

Voltage transformers, like transformers, are instruments used to transform the voltage on a line. However, the purpose of transforming voltage by the transformer is to transmit electric energy, so the capacity is large, and the capacity is generally calculated by kilovolt-ampere or mega volt-ampere; the voltage transformer is mainly used for supplying power to a measuring instrument and a relay protection device, measuring the voltage, power and electric energy of a line, or protecting valuable equipment, a motor and a transformer in the line when the line fails, so that the capacity of the voltage transformer is small, generally only a few volt-amperes and dozens of volt-amperes, and the maximum voltage of the voltage transformer does not exceed one thousand volt-amperes. The existing voltage transformer has a serious problem that when the voltage transformer is used, magnetic flux on an iron core column inside the transformer is unbalanced, so that voltage distribution is uneven, and the use accuracy of the transformer is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an indoor three-phase fusing formula voltage transformer to solve the magnetic flux unbalance on the inside iron leg of mutual-inductor when using of the voltage transformer that proposes in the above-mentioned background art, and then cause voltage distribution inhomogeneous, thereby influence the problem of the degree of accuracy that the mutual-inductor used.

In order to achieve the above object, the utility model provides a following technical scheme: an indoor three-phase fusing type voltage transformer comprises an oil expander, a porcelain box and a base, wherein the top of the oil expander is provided with a respirator through a bolt, the left side wall of the oil expander is provided with a first wiring end through a bolt, the porcelain box is arranged at the bottom of the oil expander through a bolt, the outer side wall of the porcelain box is provided with a porcelain ring, the bottom of the inner cavity of the porcelain box is provided with a plurality of supporting bakelite plates, the outer side wall of each supporting bakelite plate is provided with an iron core through a bolt, an upper section primary winding and a lower section primary winding are arranged between the supporting bakelite plates, the upper section primary winding is positioned on the upper part of the lower section primary winding, the upper section primary winding is electrically connected with the first wiring end, the bottom of the lower section primary winding is provided with a supporting column, the base is arranged at the bottom of the porcelain box through a bolt, and, the second terminal is electrically connected with the lower section of the primary winding.

Preferably, four rubber pads are installed at the bottom of the base through embedding, and the four rubber pads are installed at the bottom of the base in a square shape.

Preferably, the porcelain ring presents the annular install in the lateral wall of porcelain case, the lateral wall of porcelain case is opened there is concave groove, the porcelain ring inlay in the concave groove of porcelain case lateral wall.

Preferably, the number of the supporting bakelite plates is four, and the four supporting bakelite plates are installed at the bottom of the inner cavity of the porcelain box in a square shape.

Compared with the prior art, the beneficial effects of the utility model are that: this indoor three-phase fusing voltage transformer's setting, structural design is reasonable, installs unshakable in one's determination at the lateral wall that supports the bakelite plate, adds on two iron core posts and establishes the balanced winding that concatenates that the number of turns is the same, polarity is opposite, balanced current appears under unbalanced magnetic flux, makes the iron core go up the post and demagnetize, and the lower post magnetizes, reaches the magnetic flux basic balance in the two posts automatically to improve the degree of accuracy that the mutual-inductor used.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is the internal structure schematic diagram of the porcelain box of the present invention.

In the figure: the oil expander 100, the breather 110, the first terminal 120, the porcelain box 200, the porcelain ring 210, the supporting bakelite plate 220, the iron core 221, the upper-section primary winding 230, the lower-section primary winding 240, the supporting column 241, the base 300, the second terminal 310 and the rubber pad 320.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides an indoor three-phase fusing type voltage transformer for make the iron core go up the post and demagnetize, the lower post increases magnetism, reaches the magnetic flux basic balance in the two posts automatically, improves the degree of accuracy that the mutual-inductor used, please refer to and draw back 1-2, including oil expander 100, porcelain box 200 and base 300.

Referring to fig. 1 again, the breather 110 is mounted on the top of the oil spreader 100 by bolts, the first terminal 120 is mounted on the left side wall of the oil spreader 100 by bolts, and the oil spreader 100 is used for connecting with external wires.

Referring to fig. 1-2 again, the porcelain box 200 is mounted at the bottom of the oil spreader 100 by bolts, the porcelain ring 210 is mounted on the outer side wall of the porcelain box 200, the plurality of supporting bakelite plates 220 are mounted at the bottom of the inner cavity of the porcelain box 200, the iron core 221 is mounted on the outer side wall of each supporting bakelite plate 220 by bolts, the upper primary winding 230 and the lower primary winding 240 are mounted between the supporting bakelite plates 220, the upper primary winding 230 is located on the upper portion of the lower primary winding 240, the upper primary winding 230 is electrically connected to the first terminal 120, the supporting column 241 is mounted at the bottom of the lower primary winding 240, the porcelain box 200 is used for isolating the mutual inductance device from the outside, and the porcelain box 230 and the lower primary winding 240 are.

Referring to fig. 1, the base 300 is mounted at the bottom of the porcelain box 200 by bolts, the left sidewall of the base 300 is mounted with a second terminal 310 by bolts, the second terminal 310 is electrically connected to the lower primary winding 240, the base 300 is used for isolating the porcelain box 200 from the bottom, and the second terminal 310 is used for communicating with an external wire.

Referring to fig. 1 again, in order to improve the contact stability of the base 300 with the ground, four rubber pads 320 are mounted on the bottom of the base 300 by embedding, the four rubber pads 320 are square and mounted on the bottom of the base 300, and the rubber pads 320 are used for increasing the friction force between the base 300 and the ground.

Referring to fig. 1-2 again, in order to improve the insulating ability, the porcelain ring 210 is annularly mounted on the outer sidewall of the porcelain box 200, a concave groove is formed on the outer sidewall of the porcelain box 200, the porcelain ring 210 is embedded in the concave groove on the outer sidewall of the porcelain box 200, and the porcelain ring 210 is used for improving the insulating ability of the porcelain box 200.

Referring to fig. 2, in order to improve the stability of installing the upper-stage primary winding 230 and the lower-stage primary winding 240, the number of the supporting bakelite plates 220 is four, the four supporting bakelite plates 220 are installed at the bottom of the inner cavity of the porcelain box 200 in a square shape, and the four supporting bakelite plates 220 ensure the stability of the upper-stage primary winding 230 and the lower-stage primary winding 240 during use.

The rubber pads 320, the supporting bakelite plate 220 and the iron cores 221 are not limited to the specific number described in the embodiment, and those skilled in the art may increase or decrease the number as required on the premise that the device can perform the function of maintaining the magnetic flux balance.

The working principle is as follows: the head end of the lead is connected with the first terminal 120, the tail end of the lead is connected with the second terminal 310, the head end of the lead penetrates through the oil expander 100 and is connected with the upper-section primary winding 230, the tail end of the lead penetrates through the base 300 and is connected with the lower-section primary winding 240, mutual inductance is formed between the two windings, balanced current appears under unbalanced magnetic flux, the upper column of the iron core 221 is demagnetized, the lower column of the iron core 221 is magnetized, the magnetic flux in the two iron cores 221 is automatically basically balanced, and therefore the use safety of the mutual inductor is guaranteed.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides an indoor three-phase fusing formula voltage transformer which characterized in that: including oil expander (100), porcelain case (200) and base (300), respirator (110) are installed through the bolt in the top of oil expander (100), first wiring end (120) are installed through the bolt to the left side wall of oil expander (100), porcelain case (200) through the bolt install in the bottom of oil expander (100), porcelain ring (210) are installed to the lateral wall of porcelain case (200), a plurality of supporting bakelite plates (220) are installed to the bottom of porcelain case (200) inner chamber, iron core (221) are installed through the bolt to the lateral wall that supports bakelite plate (220), install upper segment primary winding (230) and hypomere primary winding (240) between supporting bakelite plate (220), upper segment primary winding (230) are located the upper portion of hypomere primary winding (240), upper segment primary winding (230) electric connection first wiring end (120), support column (241) is installed to the bottom of hypomere primary winding (240), base (300) pass through the bolt install in the bottom of porcelain case (200), second wiring end (310) is installed through the bolt to the left side wall of base (300), second wiring end (310) with hypomere primary winding (240) electric connection.

2. An indoor three-phase fuse-link voltage transformer according to claim 1, characterized in that: the bottom of the base (300) is provided with four rubber pads (320) through embedding, and the four rubber pads (320) are arranged at the bottom of the base (300) in a square shape.

3. An indoor three-phase fuse-link voltage transformer according to claim 1, characterized in that: porcelain ring (210) present the annular install in the lateral wall of porcelain case (200), the lateral wall of porcelain case (200) is opened there is concave groove, porcelain ring (210) inlay in the concave groove of porcelain case (200) lateral wall.

4. An indoor three-phase fuse-link voltage transformer according to claim 1, characterized in that: the number of the supporting bakelite plates (220) is four, and the supporting bakelite plates (220) are installed at the bottom of the inner cavity of the porcelain box (200) in a square shape.