Device for preventing live display from breakdown in withstand voltage test

Abstract

The utility model discloses a device for preventing an electrified display from breakdown in a withstand voltage test, which comprises the electrified display, an anti-breakdown device is connected onto a wiring terminal of a back plate of the electrified display, the anti-breakdown device comprises an insulating box, four short-circuit copper wires are arranged in the insulating box, a round hole is arranged on the insulating box, and the insulating box is connected with the anti-breakdown device. The insulating rubber ring is embedded into the circular hole, the quadruple short-circuit copper wire penetrates through the insulating rubber ring and is led out of the insulating box, the lead-out part of the quadruple short-circuit copper wire is connected with one end of the insulated soft copper wire, and the other end of the soft copper wire is connected with the clip; the short circuit protection device is simple in structure, realizes protection through short circuit of the secondary wiring terminal of the voltage sensor of the live display, can be generally used for various live displays, can directly carry out short circuit on a back plate of the live display, does not need to dismount a secondary circuit, and is rapid, simple, reliable and tight in connection.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage switch cabinet withstand voltage test, and particularly relates to a device for preventing a live display from breaking down during a withstand voltage test. Background Art

[0002] High voltage live indicator is an important device to indicate whether the switch cabinet is energized and realize the five-protection locking of the switch cabinet. It generally adopts the principle of electric field coupling between high voltage electric field and sensor to perform inductive measurement at a safe distance to avoid electric shock and electrical misoperation. Because the voltage sensor and indicator light of the live indicator form a circuit ( Figure 1 (As shown), this circuit cannot undergo a 2kV / min withstand voltage test. The withstand voltage of high-voltage switchgear is significantly higher than its rated operating voltage. The secondary high voltage sensed by the voltage sensor could easily break down the live display. During the test, proper protection must be taken by connecting the sensor output contacts in parallel to ground.

[0003] The existing method for protecting live displays involves disconnecting the voltage sensor from the indicator light circuit and then short-circuiting the sensor's secondary wire to ground. Since sensor models vary, the typical approach is to remove the leads and then cut the short-circuit wires on-site to accommodate various sensors. This method presents challenges such as loosely wound, loose connections to the sensor, and the tendency for the short-circuit wires to fall off, as well as a lengthy production process. Summary of the Invention

[0004] Based on the current status and problems of live displays during the withstand voltage test of high-voltage switchgear in the background technology, a device for preventing the breakdown of live displays during the withstand voltage test is proposed. The device is suitable for various live displays and uses a clamp to connect the display terminals. Protection can be achieved without the need for a voltage sensor and an indicator light circuit. The operation is simple, fast and recyclable.

[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0006] A device for preventing breakdown of a live display during a withstand voltage test includes a live display, wherein the anti-breakdown device is connected to a wiring terminal on a back panel of the live display, the anti-breakdown device includes an insulating box, a quadruple short-circuit copper wire is arranged inside the insulating box, a circular hole is provided on the insulating box, an insulating rubber ring is embedded in the circular hole, the quadruple short-circuit copper wire passes through the insulating rubber ring and is led out of the insulating box, the lead-out portion of the quadruple short-circuit copper wire is connected to one end of an insulated soft copper wire, and the other end of the soft copper wire is connected to a clip.

[0007] Furthermore, one end of the soft copper wire is provided with a socket, and the other end is provided with a plug, which makes it convenient to connect the copper wire and the clip.

[0008] Furthermore, the jack of the soft copper wire is connected to the lead-out portion of the quadruple short-circuit copper wire, and the plug of the soft copper wire is connected to the clip.

[0009] Furthermore, the clip is an alligator clip, and the surface of the alligator clip is coated with insulating rubber to prevent the alligator clip from contacting other conductive elements to form a loop.

[0010] Furthermore, the insulating box is a closed shell, and four round holes are provided on the bottom plate of the insulating box for leading out four-link short-circuit copper wires.

[0011] Furthermore, the interior of the insulation box is filled with insulation rubber. The purpose of filling the cavity of the insulation box with insulation colloid is to fix the copper wire and keep the insulation box insulated.

[0012] Furthermore, during the withstand voltage test, the voltage sensor terminal of the live display is clamped by a clamp.

[0013] The above technical solution can achieve the following beneficial effects:

[0014] The utility model has a simple structure and realizes protection by short-circuiting the secondary wiring terminals of the voltage sensor of the live display. The utility model can be generally used for various live displays and can be short-circuited directly on the back plate of the live display without disassembling the secondary circuit. The connection is fast, simple, reliable and tight.

[0015] There are also multiple ways to short-circuit the display circuit, and the insulated flexible wire with pins can be adjusted according to the size of the terminal block. Improvements include a dedicated device to prevent breakdown of live displays, which is simple and quick to install. It also standardizes the protection measures for non-test items during the withstand voltage test of high-voltage switchgear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the working principle diagram of the live display.

[0017] Figure 2 It is a structural diagram of the anti-breakdown device.

[0018] In the picture:

[0019] In the figure: 1. Insulation box; 2. Four-way short-circuit copper wire; 3. Round hole; 4. Insulation rubber ring; 5. Jack; 6. Soft copper wire; 7. Plug; 8. Clip; 9. Live indicator terminal; 10. Insulation rubber. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Example 1: Figure 1The diagram below shows the working principle of the live display. Currently, due to the varying sensor models, the lead wires are typically removed and then short-circuited on-site to accommodate various sensors. This method presents challenges such as loose winding of the handmade three-phase short-circuit wires, a loose connection to the sensor, easy detachment, and a lengthy production process.

[0022] Based on the above problems, Figure 2 As shown, a device is designed to prevent the breakdown of a live display during a withstand voltage test. The anti-breakdown device is in the shape of an insulating box as a whole, specifically a closed insulating box 1, with a four-way short-circuit copper wire 2 arranged inside the box. At the same time, the cavity of the insulating box is filled with insulating colloid to fix the copper wire and keep the insulating box insulated. The four-way short-circuit copper wire 2 is led out of the insulating box from four round holes 3 and connected to the jack 5 of the soft copper wire 6, and the plug 7 of the soft copper wire 6 is connected to the clip 8. The anti-breakdown device is designed to be pluggable to adapt to a variety of live displays. During the withstand voltage test, the display circuit of the live display can be protected through a variety of connection methods.

[0023] In the above embodiment, the clip 8 includes but is not limited to an alligator clip. The surface of the alligator clip is coated with insulating rubber to prevent the alligator clip from contacting other conductive elements to form a loop. In actual use, other clamps or connectors that can reasonably and conveniently connect with the terminal can also be used.

[0024] In the above embodiment, the lead-out copper wire is connected to four soft copper wires with insulating rubber skins. One end of the soft copper wire is provided with an interface for connecting to the copper wire, and one end is provided with a pin for connecting to the alligator clip. The diameter of the four-link copper wire is consistent with the pin of the soft copper wire, and the four-link copper wire can also be directly inserted into the jack of the alligator clip.

[0025] The present invention provides a connection method for explanation and description:

[0026] During the withstand voltage test, the alligator clips clamp onto the voltage sensor terminals of the live display. Specifically, a four-wire shorting copper wire leading out of the insulation box is connected to a section of soft copper wire, allowing the breakdown device to connect to live displays of various sizes. The alligator clips connected to the soft copper wire can be directly clamped to the screw holes of the terminal block, and the contact screws can short-circuit the secondary wires of the three-phase voltage sensor to ground.

[0027] The above are all preferred embodiments of the present invention. For ordinary technicians in this technical field, without departing from the principle of the present invention, various equivalent modifications to the present invention are within the scope of protection of the claims attached to this application.

Claims

1. A device for preventing a charged display from breaking down during a withstand voltage test, comprising a charged display, characterized in that: The anti-breakdown device is connected to the back panel terminal of the live display, and the anti-breakdown device includes an insulating box (1), a four-way short-circuit copper wire (2) is arranged inside the insulating box (1), a circular hole (3) is provided on the insulating box, an insulating rubber ring (4) is embedded in the circular hole, the four-way short-circuit copper wire (2) passes through the insulating rubber ring (4) and is led out of the insulating box (1), the lead-out part of the four-way short-circuit copper wire (2) is connected to one end of an insulated soft copper wire (6), and the other end of the soft copper wire (6) is connected to a clip (8).

2. The device for preventing breakdown of a charged display during a withstand voltage test according to claim 1, characterized in that: One end of the soft copper wire (6) is provided with a socket (5), and the other end is provided with a plug (7).

3. A device for preventing breakdown of a charged display during a withstand voltage test according to claim 1 or 2, characterized in that: The jack of the soft copper wire (6) is connected to the lead-out portion of the quadruple short-circuit copper wire (2), and the plug (7) of the soft copper wire (6) is connected to the clip (8).

4. The device for preventing breakdown of a charged display during a withstand voltage test according to claim 3, characterized in that: The clip (8) is an alligator clip.

5. The device for preventing breakdown of a charged display during a withstand voltage test according to claim 1, characterized in that: The insulating box (1) is a closed shell, and a bottom plate of the insulating box is provided with four round holes (3) for leading out four-link short-circuit copper wires (2).

6. The device for preventing breakdown of a charged display during a withstand voltage test according to claim 4, characterized in that: The interior of the insulating box (1) is filled with insulating rubber (10).

7. The device for preventing breakdown of a charged display during a withstand voltage test according to claim 1, characterized in that: During the withstand voltage test, the voltage sensor terminal (9) of the live display is clamped by the clamp (8).

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