CN103983814B - Comprehensive test case for transformer - Google Patents

Abstract

The invention relates to a main transformer test device in the electric power industry, in particular to a transformer comprehensive test box. It solves the technical problem of low work efficiency and potential safety hazards caused by the need for continuous upper and lower transformer wiring in the current transformer test. A transformer comprehensive test box, comprising a test box, the front panel of the box is provided with high, medium and low voltage binding posts, and the back panel of the box is also provided with high, medium and low binding posts; The columns, the medium pressure columns and the low pressure columns are all connected by connecting lines inside the test box; the front and back of the test box are equipped with a pull-out type corresponding to each high, medium and low voltage column. The shields above this terminal and on the left and right sides are shielded. After using the device, during the main transformer test, the number of climbing times is reduced, the test time is shortened, and at the same time, the potential safety hazard of personnel is reduced. Improve work efficiency and protect personal and equipment safety to the greatest extent.

Description

Transformer comprehensive test box

technical field

The invention relates to a main transformer test device in the electric power industry, in particular to a transformer comprehensive test box.

Background technique

There are many test items for transformers. Taking the specific dielectric loss test as an example, the test personnel should wear safety belts to climb the transformer. The maximum distance between the high, medium and low voltage sides of a large transformer is 7 meters. Then perform wiring to test the dielectric loss of the high voltage to the ground. Considering the safety distance between personnel and equipment (220kV is 3 meters, 110kV is 1.5 meters, 35kV is 1 meter), the wiring workers must get off the 6-meter-high transformer, To ensure personal safety. The same process is used to test medium-voltage to ground and low-voltage to-ground dielectric losses. In addition, there are high-voltage and medium-voltage bushing dielectric loss tests. Only one test item needs to be climbed up and down 12 times. Test time, increased personnel safety hazard simultaneously. Therefore need a kind of device that can improve working efficiency, protect personal and equipment safety to the greatest extent, and fully implement condition-based maintenance test procedures.

Contents of the invention

The present invention provides a transformer comprehensive test box in order to solve the technical problem of low work efficiency and potential safety hazards due to the need for non-stop upper and lower transformer wiring in the current transformer test.

The present invention is realized by adopting the following technical scheme: a transformer comprehensive test box, including a test box body, the front panel of the box body is provided with high, medium and low voltage columns, and the back panel of the box body is also provided with high, medium and low voltage columns. Columns; the high-voltage columns, medium-voltage columns and low-voltage columns on the two panels are all connected by the internal connecting lines of the test box; the front and back of the test box correspond to each high, medium and low-voltage column Both are provided with a pull-out type shielding cover that can shield the top of the binding post and the left and right sides.

According to the joint type of the test lead, the present invention makes the corresponding connection interface, and gathers the joints of the test lead used in a special connection box. Connect the front panel or the back panel to the transformer; then the other panel can be connected to the test instrument; use one by one to achieve one-to-one correspondence; the box is located outside the safe distance, replace the test instrument or the wiring connected to the transformer , you don’t need to climb up the transformer, you only need to replace the wiring next to the box. In terms of insulation, a shielding cover is used for isolation. When measuring, pull out a part of the shielding cover to shield each terminal from the adjacent terminal to maintain stable insulation. In view of the different test items in the transformer test process, it is necessary to frequently change the wiring, and the invention performs one-time wiring on the transformer to reduce the number of wiring and improve work efficiency and test accuracy. The arrangement of the terminals on the high, medium and low voltage columns and the internal connection methods are all well-known techniques of those skilled in the art, and those skilled in the art can know their implementation after reading this application document.

After using the device, during the main transformer test, the number of climbing times is reduced, the test time is shortened, and at the same time, the potential safety hazard of personnel is reduced. Improve work efficiency and protect personal and equipment safety to the greatest extent. The device also has the characteristics of small size and simple wiring.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the present invention.

Fig. 2 is a schematic diagram of the structure of the front or back panel of the present invention.

Fig. 3 is a schematic diagram of the internal connection of the present invention.

Fig. 4 is a schematic structural diagram of a first cable.

Fig. 5 is a schematic structural diagram of a second cable.

Figure 6 is a schematic diagram of the composition and structure of cables.

1-High-voltage column, 2-Medium-voltage column, 3-Low-voltage column, 4-Shield cover, 5-U-shaped socket, 6-Connection clip, 7-Hook, 8-Internal connection line, 9-Outer wear-resistant insulating layer , 10-120% covered copper braided shielding layer, 11-voltage 5KVDC insulation layer, 12-voltage 300VDC insulation layer, 13-6mm ² strands of soft copper wire.

detailed description

A transformer comprehensive test box, comprising a test box, the front panel of the box is provided with high, medium and low voltage columns, and the back panel of the box is also provided with high, medium and low columns; the high voltage columns on the two panels 1 Between the middle pressure columns 2 and the low pressure columns 3 are connected through the internal connection line 8 of the test box; the front and back of the test box are equipped with a pull-out corresponding to each high, medium and low voltage column The type can shield the shielding cover 4 on the top of the binding post and on the left and right sides. In Fig. 2, there are four groups of terminals on each terminal, and each group of terminals has three ports.

It also includes a connection cable matched with the test box; the connection cable includes three sets of first connection terminals matched with the three binding posts of the front panel, high, middle and low, and three groups of the first connection terminals matched with the three binding posts of the back panel. Two connection terminals; each group of first connection terminals includes four first cables; one end of each first cable is provided with three U-shaped sockets 5, and the other end is a terminal clamp 6; each group of second connection terminals includes Four second cables; one end of each second cable is provided with three U-shaped sockets 5 , and the other end is a pair of hooks 7 .

The shield 4 includes a pair of vertical plates and a horizontal plate connected to the top of the vertical plates; the front panel and the back panel of the test box are provided with slides above and on the left and right sides of each high, middle and low column. Crossing, the shielding cover 4 is slidably arranged in the crossing of the slideway. The shielding cover is equivalent to a cover with an opening at the lower end, covering the top and left and right sides of the terminal, and can be drawn out along the slideway to shield the terminal; corresponding slide rails can also be provided inside the box, so that the shielding cover 4 can be Better sliding.

The shielding cover 4 is made of epoxy resin. The shielding cover 4 made of epoxy resin insulating board can effectively realize the shielding of the terminal.

The length, width and height of the test box are 700mm×500mm×400mm, and the box frame is made of stainless steel.

The first connection terminal and the second connection terminal used in the device can be well connected with the transformer and the test instrument; the test box is usually provided with a grounding port for the grounding of the box. The box is small in size, flexible and convenient to carry; the frame structure is firm and durable.

The first and second cables are outer wear-resistant insulating layer 9, 120% covered copper wire braided shielding layer 10, withstand voltage 5KVDC insulating layer 11, withstand voltage 300VDC insulating layer 12 and 6mm ² from outside to inside respectively. Strand annealed copper wire 13 (shown in Figure 6). The strength and insulation performance of such cables can meet the needs of many test instruments and test content.

Claims (6)

1. A transformer comprehensive test box is characterized in that it comprises a test box, the front panel of the box is provided with high, medium and low voltage columns, and the back panel of the box is also provided with high, medium and low voltage columns; two The high-voltage columns (1), medium-voltage columns (2) and low-voltage columns (3) on the panel are all connected by the internal connection line (8) of the test box; the front and back of the test box correspond to Each high, medium and low voltage column is provided with a pull-out shielding cover (4) on the top of the terminal and on the left and right sides. 2. Transformer comprehensive test box as claimed in claim 1, is characterized in that, also comprises the wiring cable that matches with test box body; Said wiring cable includes the three groups of the first three binding posts that match with front panel, middle and low. A connection terminal and three sets of second connection terminals matching the three binding posts on the back panel; each set of first connection terminals includes four first cables; one end of each first cable is provided with three U-shaped socket (5), and the other end is a terminal block (6); each group of second terminal blocks includes four second cables; one end of each second cable is provided with three U-shaped sockets (5), and the other end is A pair of hooks (7). 3. The transformer comprehensive test box according to claim 1 or 2, characterized in that, the shielding cover (4) includes a pair of vertical plates and a horizontal plate connected to the top of the vertical plates; the front panel of the test box and On the back panel, there are slideway openings on the top and left and right sides of each high, medium and low pressure column, and the shielding cover (4) is slidably arranged in the slideway openings. 4. The transformer comprehensive test box according to claim 1 or 2, characterized in that, the shielding cover (4) is made of epoxy resin. 5. The transformer comprehensive test box according to claim 3, characterized in that, the shielding cover (4) is made of epoxy resin. 6. The transformer comprehensive test box according to claim 1 or 2, wherein the length, width and height of the test box are 700mm×500mm×400mm, and the box frame is made of stainless steel.