CN219418720U

CN219418720U - Intelligent open-circuit-preventing current transformer

Info

Publication number: CN219418720U
Application number: CN202320750420.6U
Authority: CN
Inventors: 陈文玲
Original assignee: Beijing Ruiqien Mutual Inductor Equipment Co ltd
Current assignee: Beijing Ruiqien Mutual Inductor Equipment Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-07-25
Anticipated expiration: 2033-04-07

Abstract

The utility model provides an intelligent open-circuit-preventing current transformer, which comprises: a housing; a secondary winding disposed inside the housing; the intelligent open-circuit-preventing protection device is arranged inside the shell and is electrically connected with the secondary winding; the plug interface is arranged on the shell and electrically connected with the intelligent open-circuit-preventing protection device. The intelligent open-circuit-preventing protection device in the intelligent open-circuit-preventing current transformer can cut off the secondary circuit of the current transformer with load, simplifies the connection and disassembly work of the secondary wire through the plug interface, and provides great convenience for live maintenance of the current transformer and replacement of secondary equipment.

Description

Intelligent open-circuit-preventing current transformer

Technical Field

The utility model relates to the technical field of current transformers, in particular to an intelligent open-circuit-preventing current transformer.

Background

The current transformer is an instrument for converting primary side large current into secondary side small current according to an electromagnetic induction principle to measure.

In the prior art, an M5 terminal and an M6 terminal or a secondary wire is commonly adopted in the industry as a secondary wire outlet mode of the current transformer. Because the current transformer has the characteristic that secondary open circuit can not be carried out in operation, and the secondary lead connected by adopting the M5 terminal and the M6 terminal is inconvenient to install and detach, the operation is inconvenient when the current transformer is overhauled or secondary equipment is replaced in an electrified way.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an intelligent open-circuit-preventing current transformer so as to solve the problem that the current transformer is inconvenient to overhaul in a live state or replace secondary equipment.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

an intelligent open circuit prevention current transformer, comprising:

a housing;

a secondary winding disposed inside the housing;

the intelligent open-circuit-preventing protection device is arranged inside the shell and is electrically connected with the secondary winding;

the plug interface is arranged on the shell and electrically connected with the intelligent open-circuit-preventing protection device.

Optionally, the intelligent open-circuit protection device includes: the device comprises a measuring unit, a control unit and a controllable switch unit, wherein the measuring unit, the control unit and the controllable switch unit are electrically connected in sequence.

Optionally, the secondary winding is electrically connected to the measuring unit and the controllable switching unit, respectively.

Optionally, the plug interface includes: the base is fixedly connected with the contact pieces.

Optionally, a plurality of the contact pieces are electrically connected with the intelligent open-circuit-preventing protection device.

Optionally, a filling layer is arranged between the outer shell and the secondary winding.

Optionally, a plurality of inserts are provided on the housing.

Optionally, a plurality of through holes are formed in the shell.

Optionally, the secondary winding, the intelligent open-circuit protection device and the plug interface are connected through wires.

Optionally, the shell is an acrylonitrile butadiene styrene shell.

The scheme of the utility model at least comprises the following beneficial effects:

the scheme of the utility model comprises the following steps: a housing; a secondary winding disposed inside the housing; the intelligent open-circuit-preventing protection device is arranged inside the shell and is electrically connected with the secondary winding; the plug interface is arranged on the shell and electrically connected with the intelligent open-circuit-preventing protection device. The intelligent open-circuit-preventing protection device in the intelligent open-circuit-preventing current transformer can cut off the secondary circuit of the current transformer with load, simplifies the connection and disassembly work of the secondary wire through the plug interface, and provides great convenience for live maintenance of the current transformer and replacement of secondary equipment.

Drawings

FIG. 1 is a top view of an intelligent open circuit prevention current transformer of the present utility model;

FIG. 2 is a front view of the intelligent open circuit prevention current transformer of the present utility model;

FIG. 3 is a perspective view of the intelligent open circuit prevention current transformer of the present utility model;

FIG. 4 is a schematic diagram of the plug interface of the intelligent open-circuit-proof current transformer of the present utility model;

fig. 5 is a schematic diagram of an operation module of the intelligent open-circuit protection device of the intelligent open-circuit protection current transformer.

Reference numerals illustrate:

1. a housing; 11. a filling layer; 12. an insert; 13. a through hole; 2. a secondary winding; 3. an intelligent open-circuit-preventing protection device; 31. a measuring unit; 32. a control unit; 33. a controllable switch unit; 4. a plug interface; 41. a base; 42. a contact; 5. and (5) conducting wires.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1 to 3, an embodiment of the present utility model proposes an intelligent open-circuit-preventing current transformer, including:

a housing 1;

a secondary winding 2 provided inside the housing 1;

an intelligent open-circuit-preventing protection device 3 which is arranged inside the shell 1 and is electrically connected with the secondary winding 2;

and a plug interface 4 which is arranged on the shell 1 and is electrically connected with the intelligent open-circuit-preventing protection device 3.

In this embodiment, when the secondary winding 2 is energized and operated, the intelligent open-circuit protection device 3 detects the voltage value parameter of the secondary winding 2 in real time; when the secondary winding 2 is in an open-circuit state, the intelligent open-circuit protection device 3 detects that the secondary winding 2 has high voltage, the intelligent open-circuit protection device 3 short-circuits the secondary winding 2, and the secondary winding 2 is restored to a normal connection state after the voltage value parameter is restored to be normal. The damage caused by the open circuit of the secondary circuit of the current transformer in the operation can be avoided, and the safety of personnel and equipment in maintenance is ensured.

The shell 1 can be an acrylonitrile butadiene styrene shell or other shells, and can protect the transformer.

In an alternative embodiment of the present utility model, the intelligent open-circuit protection device 3 includes: the measuring unit 31, the control unit 32 and the controllable switch unit 33 are electrically connected in sequence.

In an alternative embodiment of the utility model, the secondary winding 2 is electrically connected to the measuring unit 31 and the controllable switching unit 33, respectively.

In the above embodiment, the controllable switch unit 33 includes a switch circuit;

as shown in fig. 5, the measuring unit 31 in the intelligent open-circuit protection device 3 is electrically connected with the secondary winding 2, and detects the voltage and current parameters of the secondary winding 2, and the control unit 32 receives the parameter signals of the measuring unit 31 and determines, and then sends a control signal to the controllable switch unit 33 to control the on-off of the switch circuit;

if the measuring unit 31 detects that the voltage and current parameters of the secondary winding 2 are abnormal, the controllable switch unit 33 controls the switch circuit to be turned on, so as to short-circuit the secondary loop of the secondary winding 2 and prevent the secondary port of the current transformer from generating high voltage; after the switch circuit is turned on, the measuring unit 31 will determine whether the secondary circuit state is recovered to be normal according to the measured voltage and current parameters; when the control unit 32 determines that the secondary circuit of the current transformer is recovered to be normal through the voltage and current parameters detected by the measurement unit 31, the controllable switch unit 33 controls the switch circuit to be closed, and the short circuit of the secondary circuit is relieved, so that the current transformer operates normally.

The intelligent open-circuit protection device 3 can automatically detect abnormal conditions of the open circuit of the secondary circuit of the current transformer in operation, and can lead the corresponding secondary terminal of the current transformer to be conducted after the open circuit is detected, so that the damage caused by the open circuit of the secondary circuit of the current transformer in operation is avoided, meanwhile, when the secondary circuit of the current transformer is recovered to a normal state from an open circuit state, the device can also sense and timely and automatically cancel open-circuit protection, so that the current transformer and the secondary circuit thereof recover to normal operation, the protection effect is played on the current transformer and related secondary equipment thereof, and the operation safety of the current transformer is ensured.

In an alternative embodiment of the present utility model, the plug interface 4 includes: a base 41 and a plurality of contacts 42, wherein the base 41 and the contacts 42 are fixedly connected.

In an alternative embodiment of the present utility model, a plurality of the contacts 42 are electrically connected to the smart anti-open protection device 3.

In the above embodiment, as shown in fig. 2 and 4, the plug interface 4 is disposed on the side of the housing 1, and is plugged with a plug through the base 41; the shell 1 is internally provided with a plurality of contact pieces 42, each contact piece 42 is connected with the intelligent open-circuit-preventing protection device 3, current and voltage parameters of each contact piece 42 can be detected, accuracy of detecting the current and voltage parameters is improved, on-off of a secondary circuit can be controlled better, and safety performance of a current transformer is improved.

Optionally, the plug interface 4 uses aviation plug interface, and aviation plug interface has waterproof, dampproofing, rain-proof, sun-proof, anticorrosive advantage, the signal differentiation of being convenient for, firm in connection, signal transmission is stable.

In an alternative embodiment of the utility model, a filler layer 11 is provided between the housing 1 and the secondary winding 2.

In this embodiment, a filling layer is filled between the housing 1 and the secondary winding 2, and the filling layer 11 can perform insulation, protection and fixation on the secondary winding 2.

In this embodiment, the filling layer 11 may be a polyurethane filling layer, or may be another filling material, so long as the secondary winding 2 can be insulated, protected, and fixed.

In an alternative embodiment of the utility model, a plurality of inserts 12 are provided on the housing 1.

In this embodiment, an insert 12 is disposed on the top surface of the housing 1, and is used to mount and fix the transformer in cooperation with a bolt.

In an alternative embodiment of the present utility model, the housing 1 is provided with a plurality of through holes 13.

In this embodiment, a plurality of through holes 13 are formed on the side surface of the housing 1, and are used for installing and fixing the transformer in cooperation with long bolts.

In an alternative embodiment of the present utility model, the secondary winding 2, the intelligent open-circuit protection device 3 and the plug interface 4 are connected through a wire 5.

In this embodiment, a plurality of wires 5 are disposed in the inner filling layer of the current transformer, so that the secondary winding 2, the intelligent open-circuit protection device 3 and the plug interface 4 are conducted through the wires.

In an alternative embodiment of the present utility model, the housing 1 is an acrylonitrile butadiene styrene housing.

In this embodiment, the shell 1 may be an acrylonitrile butadiene styrene shell, or may be a shell made of other materials, so long as the transformer can be protected.

According to the intelligent open-circuit-preventing current transformer, through the arrangement of the plug interface and the intelligent open-circuit-preventing protection device, abnormal conditions of the secondary circuit of the current transformer in operation can be automatically detected, and the corresponding secondary terminal of the current transformer is conducted after the open circuit is detected, so that damage caused by the secondary circuit of the current transformer in operation is avoided, and meanwhile, when the secondary circuit of the current transformer is recovered to a normal state from an open circuit state, the device can sense and timely and automatically cancel open-circuit protection, so that the current transformer and the secondary circuit thereof recover to normal operation;

and the function of cutting off the secondary circuit of the current transformer with load at any time according to the requirement of on-site maintenance can be realized, meanwhile, the connection and disassembly work of the secondary lead of the current transformer in the past is simplified, and great convenience is provided for operation maintenance personnel on the use site.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims

1. An intelligent open-circuit-preventing current transformer, which is characterized by comprising:

a housing (1);

a secondary winding (2) disposed inside the housing (1);

the intelligent open-circuit-preventing protection device (3) is arranged inside the shell (1) and is electrically connected with the secondary winding (2);

and the plug interface (4) is arranged on the shell (1) and is electrically connected with the intelligent open-circuit-preventing protection device (3).

2. The intelligent open-circuit prevention current transformer according to claim 1, characterized in that the intelligent open-circuit prevention protection device (3) comprises: the measuring device comprises a measuring unit (31), a control unit (32) and a controllable switch unit (33), wherein the measuring unit (31), the control unit (32) and the controllable switch unit (33) are electrically connected in sequence.

3. The intelligent open-circuit-preventing current transformer according to claim 2, characterized in that the secondary winding (2) is electrically connected with the measuring unit (31) and the controllable switching unit (33), respectively.

4. The intelligent open-circuit prevention current transformer according to claim 1, wherein the plug interface (4) comprises: the device comprises a base (41) and a plurality of contact pieces (42), wherein the base (41) is fixedly connected with the contact pieces (42).

5. The intelligent open-circuit-preventing current transformer according to claim 4, wherein a plurality of the contacts (42) are electrically connected to the intelligent open-circuit-preventing protection device (3).

6. The intelligent open-circuit prevention current transformer according to claim 1, characterized in that a filling layer (11) is arranged between the housing (1) and the secondary winding (2).

7. The intelligent open-circuit prevention current transformer according to claim 1, characterized in that a plurality of inserts (12) are provided on the housing (1).

8. The intelligent open-circuit prevention current transformer according to claim 1, wherein a plurality of through holes (13) are arranged on the shell (1).

9. The intelligent open-circuit-preventing current transformer according to claim 1, wherein the secondary winding (2), the intelligent open-circuit-preventing protection device (3) and the plug interface (4) are connected through a wire (5).

10. The intelligent open-circuit prevention current transformer according to claim 1, wherein the housing (1) is an acrylonitrile butadiene styrene housing.