CN104865415A - Portable test wiring bench for high-voltage test - Google Patents

Abstract

The invention relates to a portable test wiring bench for a high-voltage test. The structure of the bench is characterized in that an insulating board is arranged in a box body; wiring insertion holes are formed in the insulating board; and high-voltage wire insertion holes are formed in side of the box body. Binding posts I and binding posts II are respectively arranged in the high-voltage wire insertion holes and the wiring insertion holes; insulators sleeve the outer surfaces of the binding posts I and the binding posts II; and bus bars are connected between the binding posts I and the binding posts II. According to the invention, all devices for items of the transformer commissioning test and the routine test are integrated to the test bench and thus integrated switching can be completed by one set of test wires so as to complete corresponding test items.

Description

Portable test terminal station for high voltage test

technical field

The invention relates to a test stand, in particular to a portable test connection stand for high-voltage tests, which is suitable for on-site transfer tests and routine tests of 220kV transformers, and belongs to the field of electric power applications.

Background technique

There are many test items in the field test of 220kV transformers. Usually, many different instruments and equipment are used for testing. During the test, the instruments and equipment and the test wiring must be replaced many times. The bushings on the high-voltage side and medium-voltage side of the 220kV transformer are very high. For example, the test personnel have to climb up and down the transformer many times to operate. This working mode is not only labor-intensive, the site is chaotic, and it is prone to safety accidents.

Contents of the invention

Aiming at the problems in the above-mentioned prior art, the present invention provides a portable test terminal for high-voltage testing, which solves the problems of high labor intensity and potential safety hazards in the prior art.

Technical scheme of the present invention is as follows:

An insulating board is set inside the box, and a wiring jack is arranged on the insulating board; a high-voltage line jack is set on the side of the box, and the high-voltage line jack and the wiring jack are respectively provided with a terminal I and a terminal II, and a terminal I and a terminal II The outer surface of the outer surface is covered with insulators; the bus bar is connected between the terminal post I and the terminal post II.

The inner surface of the box is provided with a shielding layer.

The bus bar described is a capacitive bus bar.

A flip cover is arranged above the box body.

The end face of the box body is provided with an opening and closing door.

Described casing is long 240mm, wide 200mm, high 160mm.

There are 8 terminals I and II.

The advantages and effects of the present invention are as follows:

1. The present invention is to integrate and configure the instruments and equipment used for the switching of test equipment for conventional transformer test items (direct resistance, transformation ratio, low-voltage impedance, on-load switch, dielectric loss, insulation, etc.) into the test box. Use a set of test wiring to complete the comprehensive switching of wiring, and then the corresponding test items can be completed. The test process is simple and orderly, greatly reducing the number of times of climbing large transformers and transformer bushings to change wiring and replacing instruments, greatly reducing labor intensity and reducing the number of test personnel to meet the requirements of test safety.

2. The test bench is a portable structure for easy handling and storage.

3. Equipped with test switching function, it can switch test equipment such as direct resistance, transformation ratio, low-voltage impedance, on-load switch, dielectric loss, and insulation. Improve work efficiency and make work safer and faster.

4. Reduce the labor intensity of on-site test personnel, reduce the risks of falling from heights, electric shocks and miswiring during transformer on-site tests, greatly shorten working hours, significantly reduce the number of staff, and ensure test safety.

5. The box is made of alloy material, the external box is reliably grounded, and the inside of the box is shielded with tin foil to reduce external interference sources and make the measurement more accurate. The bus bar in the box adopts capacitive bus bar to prevent corona from affecting the measurement.

6. There is a flip cover on the top of the box, which is convenient for wiring; an opening and closing door is provided on the end surface, which is convenient for storing and replacing test equipment; the size design of the box has been verified, which can not only effectively integrate the test equipment, but also minimize the volume.

Description of drawings

Fig. 1 is a structural schematic diagram of the test bench of the present invention.

Fig. 2 is a schematic diagram of wires going out from the top surface of the test bench of the present invention.

In the figure, 1. Box body, 2. Insulation board, 3. Insulator, 4. Bus bar, 5. Flip cover, 6. Opening and closing door.                   

Detailed ways

Below with reference to accompanying drawing, in conjunction with specific embodiment, describe the present invention in detail.

Example

As shown in Figure 1-2, the box body 1 is made of all-alloy material. The box body is 240mm long, 200mm wide, and 160mm high. With shielding. An insulating plate 2 is arranged in the box, and 8 wiring jacks are arranged on the insulating plate; 8 high-voltage line jacks are set on the side of the box body, and 8 terminal posts 1 and 8 terminal posts are respectively arranged on the high-voltage line jack and the wiring jack II, an insulator 3 is placed on the outer surface of the terminal post I and the terminal post II; a capacitive bus bar 4 is connected between the terminal post I and the terminal post II.

When in use, the tester installs 8 high-voltage wires on the transformer high-voltage bushing O, A, B, C three-phase and medium-voltage bushing Om, Am, Bm, Cm; connects the 8 high-voltage wires to the 8 wires on the side of the test bench Then connect to the high-voltage line jack, and then return to the inner insulation board of the test bench, and use the conversion head of the instrument and the test terminal to perform conversion respectively. The present invention is tested in a new 220kV substation 220kV No. 1 and No. 2 transformer handover test, a 220kV substation 220kV No. 1 and No. 2 transformer handover test; a 220kV substation 220kV No. No. transformer routine test, have received good results and improved test quality and safety reliability.

Claims (7)

1. Portable test terminal for high-voltage test, which is characterized in that an insulating board is arranged in the box, and wiring jacks are arranged on the insulating board; high-voltage line jacks are set on the side of the box, and terminal posts are respectively arranged on the high-voltage line jacks and the wiring jacks I and terminal II, the outer surfaces of terminal I and terminal II are covered with insulators; the bus bar is connected between terminal I and terminal II. 2. The portable test junction table for high voltage test according to claim 1, characterized in that the inner surface of the box is provided with a shielding layer. 3. The portable test junction table for high voltage test according to claim 1, characterized in that said bus bar is a capacitive bus bar. 4. The portable test junction table for high voltage test according to claim 1, characterized in that a flip cover is arranged above the box body. 5. The portable test junction table for high voltage test according to claim 1, characterized in that the end face of the box body is provided with an opening and closing door. 6. The portable test junction table for high voltage test according to claim 1, characterized in that said box is 240mm long, 200mm wide, and 160mm high. 7. The portable test junction table for high voltage test according to claim 1, characterized in that there are eight terminals I and II.