CN211089106U

CN211089106U - Transformer core ground protection mechanism

Info

Publication number: CN211089106U
Application number: CN201922254001.XU
Authority: CN
Inventors: 魏琨
Original assignee: Baoding Tianyuan Transformer Co ltd
Current assignee: Baoding Tianyuan Transformer Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-07-24
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a transformer core ground protection mechanism, including base, vacuum contactor, overvoltage protector, ground connection row, current transformer, shell, sleeve pipe, inlet wire row, fuse, outlet wire row, ampere meter, operating button, baffle and observation window. The utility model has the advantages that: the vacuum contactor can be separated and combined under the control of the operating button, free separation and combination of the grounding points are realized, so that an iron core can timely withdraw from one grounding point during two-point and multi-point grounding faults, the outgoing line row penetrates through the center of the current transformer, the current flowing through the grounding point can be known in real time, a fuse wire with current limiting protection is installed between the incoming line row and the incoming line end of the vacuum contactor, the vacuum contactor can be effectively prevented from being damaged due to overlarge grounding current, the vacuum contactor is separated by an insulated partition plate between the ammeter and the vacuum contactor at the rear end and the operating button, and when the grounding fault is prevented, the current causes interference and damage to the ammeter and the operating.

Description

Transformer core ground protection mechanism

Technical Field

The utility model relates to a ground protection mechanism specifically is a transformer core ground protection mechanism, belongs to the electrical equipment field.

Background

With the continuous development of the electrical industry, transformers are often used to perform voltage, current and impedance conversion, and to perform voltage stabilization, isolation and the like, during the operation of the transformers, an uneven electric field is formed around a charged winding and a lead, an iron core and other metal components are in the electric field, because the iron core and other metal components are in different positions and have different electric potentials, when the potential difference between two points reaches the value capable of breaking down the insulation between the two points, spark discharge is generated, and after a long time, the solid insulation part of the transformer is gradually damaged, so that accidents occur, in order to prevent the accidents, the iron core needs to be grounded, the existing iron core grounding mode is mainly to ground through an oil tank, or the lead is used to directly ground, but when the iron core is grounded at more than two points, a closed loop is formed between the grounding points, and when a main flux passes through the closed loop, circulating current is generated, the current is too big, causes local overheat accident, and the earth connection can't break this moment, exposes outside in addition in case produce circulation current, causes danger easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a transformer core ground protection mechanism just for solving above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose: a transformer core grounding protection mechanism comprises a base, a vacuum contactor, an overvoltage protector, a grounding bar, a current transformer, a shell, a sleeve, a wire inlet bar, a fuse wire, a wire outlet bar, an ammeter, an operating button, a partition plate, an insulator and an observation window; the vacuum contactor and the overvoltage protector are fixedly installed on the base, the overvoltage protector is located at the rear end of the vacuum contactor, the overvoltage protector is connected with the lower end of the incoming line row, the grounding row is installed on the base, the shell is fixed on the upper portion of the base, a current transformer is fixed on the shell side wall of the front end of the vacuum contactor, a sleeve is installed at the upper end of the shell, the incoming line row penetrates through one end of the sleeve and one end of a fuse wire to be connected together, the other end of the fuse wire is fixed at the incoming line end of the vacuum contactor, the fuse wire for current limiting protection is installed between the incoming line row and the incoming line end of the vacuum contactor, an insulator is fixed on the shell side wall of the rear end of the overvoltage protector, the incoming line row is fixed on the insulator, the outgoing line row is installed at the outgoing line end of the vacuum contactor, install ampere meter and operating button on the shell, the row of being qualified for the next round of competitions passes current transformer's center, ampere meter and current transformer electricity are connected together, operating button and vacuum contactor electric connection are in the same place, vacuum contactor can divide and shut under operating button control, the internally mounted of shell has the baffle, the baffle of being insulated separates between the vacuum contactor of ampere meter and operating button and rear end, be provided with the observation window on the shell, the lateral wall that the row of being qualified for the next round of competitions passes through sleeve pipe and insulator and shell is separated.

Furthermore, in order to enable the iron core to timely exit from one grounding point when the two-point and multi-point grounding faults occur, the vacuum contactor can be switched on and off under the control of an operating button.

Further, in order to know the current flowing through the grounding point in real time, the outgoing line row penetrates through the center of the current transformer.

Furthermore, in order to prevent the vacuum contactor from being damaged by excessive grounding current, a fuse wire for current limiting protection is arranged between the incoming line row and the incoming line end of the vacuum contactor.

Further, in order to prevent the current meter and the operating button from being interfered and damaged by a large current, the current meter and the operating button are separated from the vacuum contactor at the rear end by an insulating partition plate.

Further, the overvoltage protector is connected to the lower end of the inlet line bank in order to be able to absorb dangerous excess voltages.

Furthermore, in order to ensure the insulation effect between the wire inlet row and the shell, the wire inlet row is separated from the side wall of the shell through a sleeve and an insulator.

The utility model has the advantages that: the grounding protection mechanism has compact structure connection, simple use and reasonable design, the vacuum contactor can be separated and combined under the control of the operating button to realize the free separation of the grounding points, so that the iron core can exit one grounding point in time when two-point or multi-point grounding faults occur, the outgoing line bar passes through the center of the current transformer and can know the current flowing through the grounding point in real time, a fuse wire with current-limiting protection is arranged between the incoming line bar and the incoming line end of the vacuum contactor to effectively prevent the vacuum contactor from being damaged by overlarge grounding current, the ammeter and the operating button are separated from the vacuum contactor at the rear end by an insulated partition plate to prevent the ammeter and the operating button from being interfered and damaged by heavy current when the grounding faults occur, the overvoltage protector is connected with the lower end of the incoming line bar to absorb dangerous extra voltage, thereby effectively reducing the damage caused by lightning stroke and the like, the inlet wire row is separated from the side wall of the shell through the sleeve and the insulator, so that the insulation effect between the inlet wire row and the shell is ensured, and the shell cannot be electrified during ground fault.

Drawings

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

FIG. 2 is a schematic view of the overall structure of the present invention;

in the figure: 1. the device comprises a base, 2, a vacuum contactor, 3, an overvoltage protector, 4, a grounding bar, 5, a current transformer, 6, a shell, 7, a sleeve, 8, an incoming line bar, 9, a fuse, 10, an outgoing line bar, 11, an ammeter, 12, an operating button, 13, a partition plate, 14, an insulator, 15 and an observation window.

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.

Referring to fig. 1-2, a transformer core ground protection mechanism includes a base 1, a vacuum contactor 2, an overvoltage protector 3, a ground bar 4, a current transformer 5, a housing 6, a bushing 7, a wire inlet bar 8, a fuse 9, a wire outlet bar 10, an ammeter 11, an operation button 12, a partition 13, an insulator 14, and an observation window 15; the vacuum contactor 2 and the overvoltage protector 3 are fixedly installed on the base 1, the overvoltage protector 3 is located at the rear end of the vacuum contactor 2, the overvoltage protector 3 is connected with the lower end of a wire inlet row 8, the grounding row 4 is installed on the base 1, the shell 6 is fixed on the upper portion of the base 1, a current transformer 5 is fixed on the side wall of the shell 6 at the front end of the vacuum contactor 2, a sleeve 7 is installed at the upper end of the shell 6, the wire inlet row 8 penetrates through the sleeve 7 and is connected with one end of the fuse 9, the other end of the fuse 9 is fixed at the wire inlet end of the vacuum contactor 2, the fuse 9 for current limiting protection is installed between the wire inlet row 8 and the wire inlet end of the vacuum contactor 2, an insulator 14 is fixed on the side wall of the shell 6 at the rear end of the overvoltage protector 3, and the wire inlet row 8 is fixed on, an outlet line row 10 is installed at the outlet end of the vacuum contactor 2, the other end of the outlet line row 10 is connected with the grounding line row 4, an ammeter 11 and an operating button 12 are installed on the shell 6, the outlet line row 10 penetrates through the center of the current transformer 5, the ammeter 11 and the current transformer 5 are electrically connected together, the operating button 12 and the vacuum contactor 2 are electrically connected together, the vacuum contactor 2 can be switched on and off under the control of the operating button 12, a partition plate 13 is installed inside the shell 6, the ammeter 11 and the operating button 12 are separated from the vacuum contactor 2 at the rear end through the insulated partition plate 13, an observation window 15 is arranged on the shell 6, and the inlet line row 8 is separated from the side wall of the shell 6 through a sleeve 7 and an insulator 14.

As the utility model discloses a technical optimization scheme: the vacuum contactor 2 can be switched on and off under the control of an operating button 12; the outlet line row 10 passes through the center of the current transformer 5; a fuse wire 9 for current limiting protection is arranged between the wire inlet row 8 and the wire inlet end of the vacuum contactor 2; the ammeter 11 and the operating button 12 are separated from the vacuum contactor 2 at the rear end by an insulating partition plate 13; the overvoltage protector 3 is connected with the lower end of the wire inlet row 8; the inlet row 8 is separated from the side wall of the housing 6 by a bushing 7 and an insulator 14.

The utility model discloses when using, at first link together incoming line row and transformer core, arrange the ground connection and be connected with the ground, then connect the upper power supply for operating button, when normal use, can press the combined floodgate button and make vacuum contactor inhale with for transformer core ground connection normally plays the effect of protection, current appears when the ampere meter, shows to have produced circulating current, presses separating brake operating button this moment, makes the disconnection of vacuum contactor, the disconnection ground point, make circulating current open a way.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a transformer core ground protection mechanism which characterized in that: the device comprises a base (1), a vacuum contactor (2), an overvoltage protector (3), a grounding bar (4), a current transformer (5), a shell (6), a sleeve (7), an incoming line bar (8), a fuse (9), an outgoing line bar (10), an ammeter (11), an operating button (12), a partition plate (13), an insulator (14) and an observation window (15); the vacuum contactor is characterized in that a vacuum contactor (2) and an overvoltage protector (3) are fixedly arranged on the base (1), the overvoltage protector (3) is located at the rear end of the vacuum contactor (2), a grounding bar (4) is arranged on the base (1), a shell (6) is fixed on the upper portion of the base (1), a current transformer (5) is fixed on the side wall of the shell (6) at the front end of the vacuum contactor (2), a sleeve (7) is arranged at the upper end of the shell (6), an incoming line bar (8) penetrates through one ends of the sleeve (7) and a fuse wire (9) to be connected together, the other end of the fuse wire (9) is fixed at the incoming line end of the vacuum contactor (2), an insulator (14) is fixed on the side wall of the shell (6) at the rear end of the overvoltage protector (3), the incoming line bar (8) is fixed on the insulator (14), and an outgoing line bar (10) is installed at the outgoing line, the other end of outlet row (10) is connected with ground connection row (4), install ampere meter (11) and operating button (12) on shell (6), ampere meter (11) and current transformer (5) electricity are connected together, operating button (12) and vacuum contactor (2) electricity are connected together, the internally mounted of shell (6) has baffle (13), be provided with observation window (15) on shell (6).

2. The transformer core ground protection mechanism of claim 1, characterized in that: the vacuum contactor (2) can be switched on and off under the control of an operating button (12).

3. The transformer core ground protection mechanism of claim 1, characterized in that: the outlet line row (10) passes through the center of the current transformer (5).

4. The transformer core ground protection mechanism of claim 1, characterized in that: and a fuse wire (9) for current limiting protection is arranged between the wire inlet row (8) and the wire inlet end of the vacuum contactor (2).

5. The transformer core ground protection mechanism of claim 1, characterized in that: the ammeter (11) and the operating button (12) are separated from the vacuum contactor (2) at the rear end by an insulating partition plate (13).

6. The transformer core ground protection mechanism of claim 1, characterized in that: the overvoltage protector (3) is connected with the lower end of the incoming line bar (8).

7. The transformer core ground protection mechanism of claim 1, characterized in that: the inlet line bank (8) is separated from the side wall of the housing (6) by a bushing (7) and an insulator (14).