CN203849288U - Wiring conversion device for electrical routine tests of transformer - Google Patents

Abstract

The utility model relates to a transformer electrical routine test wiring conversion device, which is characterized in that it includes an insulating panel, a transformer terminal group, a transfer switch group, a test instrument terminal group, a short circuit terminal and a grounding terminal. The transformer terminal group, transfer switch group, and test instrument terminal group are installed on the insulating panel, and the transformer terminal group is connected with the test instrument terminal group through the transfer switch group; the transfer switch group includes grounding, connection, short circuit, There are four states of open circuit; the short-circuit terminal is connected to the short-circuit state point of the transfer switch group, and the ground connection post is connected to the ground state point of the transfer switch group. The utility model has a reasonable design, improves the test efficiency, ensures the accuracy of the test results, effectively solves the problem of frequent disconnection of the transformer electrical routine test process, and has the advantages of simple structure, safety and reliability, and convenient use.

Description

Transformer electrical routine test wiring conversion device

technical field

The utility model belongs to the technical field of transformers, in particular to a transformer electrical routine test wiring conversion device.

Background technique

Electrical routine test is an important means to judge whether the transformer is defective. The items of transformer electrical routine test include insulation resistance of winding and iron core (clamp), DC resistance of winding, dielectric loss and capacitance of winding and bushing, etc. Due to the different wiring methods of each test item, it is necessary to frequently disassemble the wiring on the transformer body on site. It is also easy to cause unreliable wiring and affect the accuracy of test results.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art, provide a transformer electrical routine test wiring conversion device, and solve the problem of frequent disconnection of the transformer electrical test during the routine test process.

The utility model solves its technical problem and realizes by taking the following technical solutions:

A transformer electrical routine test wiring conversion device, including an insulating panel, a transformer terminal group, a transfer switch group, a test instrument terminal group, a short circuit terminal and a grounding terminal, the transformer terminal group, the transfer switch group, The terminal group of the test instrument is installed on the insulating panel, and the terminal group of the transformer is connected with the terminal group of the test instrument through the transfer switch group; the transfer switch group includes four states: grounding, connection, short circuit, and open circuit; the short circuit The terminal is connected to the short-circuit state point of the transfer switch group, and the grounding terminal is connected to the ground state point of the transfer switch group.

And, described transformer terminal group comprises 12 transformer terminals and is used for connecting transformer, and described test instrument terminal group includes 12 test instrument terminals and is used for connecting test instrument, and the quantity of described transfer switch group is 12, respectively connected to the terminal of the transformer and the terminal of the test instrument.

Moreover, the transformer terminal, transfer switch and test instrument terminal are installed on the insulating panel in three rows.

Moreover, the insulating panel is made of epoxy resin material.

Moreover, the transfer switch is connected with the transformer terminal, the test instrument connection, the short-circuit terminal and the grounding terminal through insulated wires.

Advantage and positive effect of the present utility model are:

The utility model has a reasonable design, and can fully realize the adjustment of the wiring mode in the test by arranging the transformer terminal, transfer switch, test instrument terminal, short-circuit terminal and grounding terminal on the insulating panel, and conducting routine electrical tests on the transformer through the switch. , improve the test efficiency, ensure the accuracy of the test results, and effectively solve the problem of frequent disconnection of the transformer electrical routine test process. It has the advantages of simple structure, safety and reliability, and convenient use.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model embodiment is described in further detail:

A transformer electrical routine test wiring conversion device, as shown in Figure 1, includes an insulating panel, a transformer terminal group, a transfer switch group, a test instrument terminal group, a short-circuit terminal G and a grounding terminal N. The transformer The terminal group, the transfer switch group and the test instrument terminal group are installed on the insulating panel in three rows, and the transformer terminal group is connected with the test instrument terminal group through the transfer switch group. The insulating panel is made of epoxy resin material, which is used to realize the insulating function between each terminal, and the withstand voltage is greater than the dielectric loss test voltage of 10kV. The transformer terminal group is used to connect the transformer. According to the maximum connection design of the three-phase transformer, it includes a total of 12 transformer terminals of high, medium and low three-phase terminals and neutral points, which are respectively terminals 1-1 to 1-12; the test instrument terminal group is used to connect the test instrument, corresponding to the transformer terminal, a total of 12 test instrument terminal, respectively terminal 2-1 to 2-12. The transfer switch group is used to realize the conversion of the wiring mode, including 12 transfer switches, each transfer switch includes four states of grounding, connection, short circuit, and open circuit, and the corresponding transfer switches are respectively in a, b, c, d Location. The short-circuit terminal is connected with the short-circuit state position point of each transfer switch, and is used for applying a test voltage during the insulation resistance and dielectric loss test; the ground connection post is connected with the ground state position point of each transfer switch for Realize the grounding function. The above transfer switch is connected to the transformer terminal, test instrument wiring, short-circuit terminal G and ground terminal N through insulated wires, and the insulated wire is used to realize the one-to-one connection between the transformer terminal and the test instrument terminal through the transfer switch. Corresponding connection and realization of the three-phase short circuit function between the corresponding terminals of the transformer.

The utility model is described below by taking a three-phase transformer as an example, and the connection group of the transformer is YNyn0d11:

(1) Connect the high and medium voltage terminals, neutral point and low voltage terminal of the transformer to the terminals 1-1 to 1-11 of the transformer, among which 1-1 corresponds to the high voltage phase A terminal, and 1-2 corresponds to the high voltage terminal Phase B terminal, ..., 1-11 corresponds to the low-voltage phase C terminal, and connect the grounding terminal N to the ground.

(2) Winding DC resistance test: Take the high-voltage A-phase DC resistance test as an example, connect the DC resistance tester to the terminals 2-1 and 2-4 of the test instrument, and switch the switch 1 and 4 to the connection position b. All other transfer switches are switched to the open circuit position d, and then the DC resistance test of the winding can be carried out.

(3) Insulation resistance and dielectric loss test: Take the high voltage to medium voltage, low voltage and ground insulation and dielectric loss test as an example, connect the high voltage output of the dielectric loss tester to the short-circuit terminal G, and switch the transfer switches 1 to 4 to In the short-circuit position c, switch the transfer switches 5 to 11 to the ground position a, and the insulation resistance and dielectric loss test can be carried out.

It should be emphasized that the embodiments described in the utility model are illustrative rather than restrictive, so the utility model includes but not limited to the embodiments described in the specific implementation, and those skilled in the art according to the utility model Other implementations derived from the new technical solution also belong to the scope of protection of the utility model.

Claims (5)

1. the electric routine test connecting wire switching device of transformer, it is characterized in that: comprise insulating panel, transformer binding post group, switch group, test apparatus binding post group, short circuit binding post and ground connection binding post, described transformer binding post group, switch group, test apparatus binding post group are arranged on insulating panel, and transformer binding post group is connected with test apparatus binding post group by switch group; Described switch group comprises ground connection, connection, short circuit, four kinds of states of open circuit; Described short circuit binding post is connected with the short-circuit condition point of switch group, and described ground connection binding post is connected with the ground state point of switch group.

2. the electric routine test connecting wire switching device of transformer according to claim 1, it is characterized in that: described transformer binding post group comprises that 12 transformer binding posts are for connection transformer, described test apparatus binding post group comprises that 12 test apparatus binding posts are for joint test instrument, the quantity of described switch group is 12, is connected with test apparatus binding post respectively at transformer binding post.

3. the electric routine test connecting wire switching device of transformer according to claim 2, is characterized in that: described transformer binding post, switch and test apparatus binding post divide three rows to be arranged on insulating panel.

4. according to the electric routine test connecting wire switching device of the transformer described in claims 1 to 3 any one, it is characterized in that: described insulating panel adopts epoxide resin material to make.

5. according to the electric routine test connecting wire switching device of the transformer described in claims 1 to 3 any one, it is characterized in that: between described switch and transformer binding post, test apparatus wiring and short circuit binding post and ground connection binding post, be all connected by insulated conductor.