CN211788587U - Lead-out device of transformer - Google Patents

Abstract

The utility model discloses a lead-out device of a transformer, which structurally comprises a short circuit rod, a voltage equalizing ball, an oil valve, a grounding end of a transformer shell, a leakage protector, wheels, a main body, a low voltage output terminal, a high voltage terminal, a transformer handle and a high voltage sleeve, wherein the lower end of the short circuit rod is arranged at the upper end of the voltage equalizing ball, and the lower end of the voltage equalizing ball is arranged at the upper end of the high voltage sleeve, the leakage protector is structurally arranged, so that the leakage release acts to push the instantaneous release to trigger the release and brake separating unit, then the automatic switch is tripped by the connecting rod to achieve the purpose of leakage protection, when short circuit and leakage fault occur, and the human body with fatal danger is protected from electric shock, when the current reaches the action current value limited by the protector, the protector has the overload and short-circuit protection functions, and immediately acts within the limited time to automatically cut off the power supply for protection.

Description

Lead-out device of transformer

Technical Field

The utility model relates to a draw-off gear of transformer belongs to the transformer field of making.

Background

With the vigorous development of the electric power industry and the petrochemical industry in China, the cross-linked power cable is more and more widely used, and the connection and installation with a power transmission and distribution transformer also puts forward new requirements: such as the requirement of full sealing, full insulation, space saving, pollution prevention and the like of the transformer; in recent years, a separable cable connector, namely an inner cone plug-in terminal is frequently applied to gas insulated closed switch equipment, is fully insulated, fully shielded, maintenance-free and pluggable, can well solve the inherent weakness of outgoing lines of the porcelain bottle type bushing of the transformer, is suitable for connecting electrical equipment and cables, mainly comprises a conductor connecting part, an inner cone plug-in terminal insulator and an aluminum shell, and also comprises an inner cone socket and an inner cone insulation choke plug matched with the inner cone plug-in terminal.

The prior art discloses the application numbers as follows: 201420328117.8, including transformer tank's case lid, the wire hole that is used for high-voltage lead cable to be qualified for the next round of competitions is seted up to the high-pressure side of case lid, still be provided with the lift seat of cover above the wire hole on the high-pressure side of case lid, it is provided with the seat hole to rise the seat lateral wall, rises to be provided with in the seat to install along the horizontal direction interior conical socket on the seat hole, socket electrode and high-voltage lead cable electrical connection on the interior conical socket rise the seat lateral wall be provided with the interior conical insulation bulkhead of interior conical socket cooperation installation, it is equipped with interior conical plug-in terminal to insert on the interior conical insulation bulkhead, but this prior art is in operation, common transformer short-circuit fault, electric leakage fault, easily makes the transformer damage.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a draw-out device of transformer to what solve in operation process, common transformer short-circuit fault, electric leakage trouble easily make the problem that the transformer damaged.

In order to achieve the above purpose, the present invention is realized by the following technical solution: a leading-out device of a transformer structurally comprises a short circuit rod, a voltage-sharing ball, an oil valve, a transformer shell grounding end, a leakage protector, a wheel, a main body, a low-voltage output terminal, a high-voltage terminal, a transformer handle and a high-voltage sleeve, wherein the lower end of the short circuit rod is arranged at the upper end of the voltage-sharing ball, the lower end of the voltage-sharing ball is arranged at the upper end of the high-voltage sleeve, the oil valve is arranged at the upper end of the main body, the bottom surface of the transformer shell grounding end is attached to the upper surface of the main body, the leakage protector is arranged on the outer surface of the main body, the wheel is connected onto the main body through a bolt, the low-voltage output terminal is attached to the upper surface of the main body, the voltage output terminal is vertically arranged on the upper surface of the main, the earth-leakage protector comprises a shell, an arc extinguish chamber, a zero sequence transformer, an integrated electronic board, an earth-leakage tripper, an automatic switch, an instantaneous tripper, a connecting rod, a tripping opening unit and a wiring end, wherein the arc extinguish chamber is arranged inside the shell, the bottom surface of the zero sequence transformer is attached to the upper surface of the integrated electronic board, the instantaneous tripper is vertically arranged at the upper end of the earth-leakage tripper, the automatic switch is connected to the tripping opening unit through the connecting rod, and the wiring end is in threaded connection inside the shell.

Further, the earth leakage protector is electrically connected with the low-voltage output terminal through a lead.

Further, the main body is a regular hexagonal prism.

Further, the earth leakage protector is provided with two wiring terminals.

Further, the height of the main body is 90cm, and the length of the bottom edge is 50 cm.

Furthermore, the Mitsubishi model BV-D leakage protector is large in connection and load over current under specified conditions, long in service life and small in environmental influence.

Further, the transformer high-voltage bushing has good thermal stability and can bear instant overheating during short circuit.

Advantageous effects

The utility model relates to a leading-out device of transformer, structurally set up the earth-leakage protector, connect the wiring end of the earth-leakage protector in the low-voltage circuit, there is no leakage current to pass through the earth-leakage protector except the working current in the circuit during normal operation, the current that flows through the zero sequence transformer is equal in magnitude, opposite in direction, the total is zero, zero sequence transformer induced magnetic flux is also equal to zero, automatic switch keeps the switch-on state, the earth-leakage protector is in normal operation, when short circuit, electric leakage or someone electric shock occurs by the earth-leakage protector and circuit, there is a ground fault current, make the current magnitude in the zero sequence transformer flow and nonzero, the zero sequence transformer induced magnetic flux, the integrated electronic board amplifies the signal, output after amplifying, the explosion chamber reduces the spark influence to the external world, make the earth-leakage release action promote the instantaneous release to, then, the automatic switch is tripped by the connecting rod to achieve the purpose of leakage protection, when short circuit and leakage fault occur and the human body with fatal danger is protected by electric shock, and when the action current value limited by the protector is reached, the automatic switch has the functions of overload protection and short-circuit protection, and immediately acts to automatically cut off the power supply within limited time to protect.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of a lead-out device of a transformer according to the present invention;

fig. 2 is a schematic view of the section structure of the leakage protector of the present invention.

In the figure: the high-voltage transformer comprises a short-circuit rod-1, a voltage-sharing ball-2, an oil valve-3, a transformer shell grounding end-4, a leakage protector-5, wheels-6, a main body-7, a low-voltage output terminal-8, a voltage output terminal-9, a high-voltage terminal-10, a transformer handle-11, a high-voltage sleeve-12, a shell-501, an arc extinguish chamber-502, a zero-sequence transformer-503, an integrated electronic board-504, a leakage tripper-505, an automatic switch-506, an instantaneous tripper-507, a connecting rod-508, a tripping and opening unit-509 and a terminal-5010.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1 and 2, the present invention provides a technical solution of a transformer lead-out device: the structure of the transformer comprises a short-circuit rod 1, a voltage-sharing ball 2, an oil valve 3, a transformer shell grounding end 4, a leakage protector 5, a wheel 6, a main body 7, a low-voltage output terminal 8, a voltage output terminal 9, a high-voltage terminal 10, a transformer handle 11 and a high-voltage sleeve 12, wherein the lower end of the short-circuit rod 1 is installed at the upper end of the voltage-sharing ball 2, the lower end of the voltage-sharing ball 2 is installed at the upper end of the high-voltage sleeve 12, the oil valve 3 is arranged at the upper end of the main body 7, the bottom surface of the transformer shell grounding end 4 is attached to the upper surface of the main body 7, the leakage protector 5 is installed on the outer surface of the main body 7, the wheel 6 is connected onto the main body 7 through bolts, the low-voltage output terminal 8 is attached to the upper surface of the main body 7, the voltage output terminal 9 is vertically installed on, the lower end of the high-voltage bushing 12 is inlaid at the upper end of the main body 7, the leakage protector 5 comprises a shell 501, an arc extinguish chamber 502, a zero sequence transformer 503, an integrated electronic board 504, a leakage release 505, an automatic switch 506, an instantaneous release 507, a connecting rod 508, a tripping and separating unit 509 and a terminal 5010, the arc extinguish chamber 502 is arranged inside the shell 501, the bottom surface of the zero sequence transformer 503 is attached to the upper surface of the integrated electronic board 504, the instantaneous release 507 is vertically installed on the upper end of the leakage release 505, the automatic switch 506 is connected to the tripping and opening unit 509 through a connecting rod 508, the terminal 5010 is screwed into the inside of the housing 501, the earth-leakage protector 5 is electrically connected to the low-voltage output terminal 8 by a wire, the main body 7 is a regular hexagonal prism, the wiring terminals 5010 are two, the height of the main body 7 is 90cm, and the length of the bottom edge is 50 cm.

The wheels 6 are the movable caster wheels used for moving the box body, and the leakage protector 5 is a leakage switch for short, and is an electric safety device.

For example, a xian, an electric company, connects the terminal 5010 of the earth-leakage protector 5 to a low-voltage circuit, when the circuit normally works, no leakage current except the working current passes through the leakage protector 5, at this time, the currents flowing through the zero sequence transformer 503 are equal in magnitude and opposite in direction, the sum is zero, the induced magnetic flux of the zero sequence transformer 503 is also equal to zero, the automatic switch 506 is kept in a switch-on state, the leakage protector 5 is in normal operation, when the leakage protector 5 and the line generate short circuit, leakage or electric shock, there is a grounding fault current, the sum of the current flowing through the zero sequence transformer 503 is not zero, the zero sequence transformer induces magnetic flux, the integrated electronic board 504 amplifies the signal, and outputs the amplified signal, the arc extinguish chamber 502 reduces the influence of external spark, the leakage release 505 pushes the instantaneous release 507 to trigger the release unit 509, the automatic switch 506 is then tripped by the link 508 for earth leakage protection.

The utility model solves the problems of common short-circuit fault and leakage fault of the transformer and easy damage of the transformer in the operation process, the utility model connects the wiring end of the leakage protector in the low-voltage circuit through the mutual combination of the components, no leakage current passes through the leakage protector except the working current in the circuit during normal operation, the current flowing through the zero sequence transformer is equal in magnitude, opposite in direction and zero in total, the induced magnetic flux of the zero sequence transformer is also equal to zero, the automatic switch is kept in a switch-on state, the leakage protector is in normal operation, when the leakage protector and the circuit generate short circuit and leakage or electric shock by someone, a grounding fault current is provided, the current flowing through the zero sequence transformer is not zero, the zero sequence transformer induces magnetic flux, the integrated electronic board amplifies signals, the signals are output after amplification, and the arc extinguish chamber reduces the spark influence to the outside, the leakage tripper acts to push the instantaneous tripper to trigger the tripping and separating unit, and the automatic switch is tripped by the connecting rod to protect the leakage, so that the leakage current is protected when short circuit fault and leakage fault occur and the person with fatal danger is protected against electric shock.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied 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 (5)

1. The lead-out device of the transformer is characterized in that: the structure of the transformer comprises a short circuit rod (1), a voltage-sharing ball (2), an oil valve (3), a transformer housing grounding end (4), a leakage protector (5), wheels (6), a main body (7), a low-voltage output terminal (8), a voltage output terminal (9), a high-voltage terminal (10), a transformer handle (11) and a high-voltage sleeve (12), wherein the lower end of the short circuit rod (1) is installed at the upper end of the voltage-sharing ball (2), the lower end of the voltage-sharing ball (2) is installed at the upper end of the high-voltage sleeve (12), the oil valve (3) is arranged at the upper end of the main body (7), the bottom surface of the transformer housing grounding end (4) is attached to the upper surface of the main body (7), the leakage protector (5) is installed on the outer surface of the main body (7), the wheels (6) are connected to the main body (7) through bolts, and the, the voltage output terminal (9) is vertically installed on the upper surface of the main body (7), the high-voltage terminal (10) is attached to the upper surface of the main body (7), the transformer handle (11) is welded to the left end and the right end of the main body (7), the lower end of the high-voltage sleeve (12) is embedded to the upper end of the main body (7), the leakage protector (5) comprises a shell (501), an arc extinguish chamber (502), a zero sequence transformer (503), an integrated electronic board (504), a leakage tripper (505), an automatic switch (506), an instantaneous tripper (507), a connecting rod (508), a tripping and separating brake unit (509) and a wiring terminal (5010), the arc extinguish chamber (502) is arranged inside the shell (501), the bottom surface of the zero sequence transformer (503) is attached to the upper surface of the integrated electronic board (504), and the instantaneous tripper (507) is vertically installed on the upper end of the, the automatic switch (506) is connected to a tripping and opening unit (509) through a connecting rod (508), and the terminal (5010) is in threaded connection with the inside of the shell (501).

2. The extraction device of a transformer according to claim 1, wherein: the leakage protector (5) is electrically connected with the low-voltage output terminal (8) through a lead.

3. The extraction device of a transformer according to claim 1, wherein: the main body (7) is a regular hexagonal prism.

4. The extraction device of a transformer according to claim 1, wherein: the leakage protector (5) is provided with two wiring ends (5010).

5. The extraction device of a transformer according to claim 1, wherein: the height of the main body (7) is 90cm, and the edge length of the bottom of the main body is 50 cm.

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