CN205157597U - Power transformer's experimental pencil - Google Patents

Abstract

The application discloses power transformer's experimental pencil, this experiment pencil includes many wires of quantity assorted of quantity and power transformer's terminal outgoing lines, the quantity of wire and power transformer's terminal outgoing lines's quantity phase -match, the one end of wire is provided with the fastener that is used for connecting power transformer's terminal outgoing lines, the other end is provided with and is used for connecting testing equipment terminal plug, before carrying out multiple experiment to power transformer, the corresponding terminal outgoing lines of all wires with power transformer be connected to the fastener of testing personnel on through the wire, only need be connected the wire of difference with corresponding testing equipment in the process of the test and to carry out different experiments, and need not to ascend a height the change connecting wire many times, so as to reduces the potential safety hazard in the process of the test.

Description

A test wiring harness of a power transformer

technical field

The present application relates to the field of electric power technology, and more specifically, relates to a test wire harness of a power transformer.

Background technique

A power transformer is a static electrical device that is used to convert a certain value of AC voltage into one or several different voltages with the same frequency. It is the heart of a substation, through which the substation needs to complete the conversion of voltage levels and the transmission of electric energy. Before the power transformer is put into operation, various electrical tests need to be carried out to determine whether there are quality problems in installation or manufacturing, so as to determine whether it can be put into operation normally. The electrical test includes transformation ratio test, DC resistance test, on-load tap changer test, and short-circuit impedance test.

Because power transformers are generally large in size, and 220kV power transformers are even seven or eight meters high, each test requires testers to use an aerial work vehicle to send the test line to the lead-out end of the transformer bushing, and then connect the test line to the terminal , and then connect the corresponding test equipment to the other end of the test line for testing. Due to the need for multiple tests, each test requires different test equipment, and the test lines are often not universal, which leads to the need for test personnel to climb up again to replace the corresponding test lines after each test is completed. The first test needs to replace the test line three times, which is time-consuming and labor-intensive, and also increases the potential safety hazard on site.

Utility model content

In view of this, the present application provides a test wire harness of a power transformer, which is used to connect the terminal of the power transformer and test equipment, so as to solve the problem of potential safety hazards caused by the need to replace the test wires many times when testing the power transformer in the past.

In order to achieve the above purpose, the proposed scheme is as follows:

A test wiring harness for a power transformer, including a plurality of wires, wherein:

The number of the wires matches the number of outgoing terminals of the power transformer;

One end of the wire is provided with a clamp for connecting the outgoing terminal, and the other end is provided with a terminal plug for connecting with the test equipment.

Optionally, the number of the wires is 11, which are respectively used to connect the 4 high-voltage outgoing wire terminals, 4 medium-voltage outgoing wire terminals, and 3 low-voltage outgoing wire terminals of the power transformer.

Optionally, the wire is a relay protection test wire.

Optionally, the relay protection test line is a 2.5 square millimeter relay protection test line.

Optionally, an auxiliary connection harness is also included, where:

The auxiliary connection harness includes a plurality of connection wires and aviation plugs;

One end of the connecting wire is connected to the corresponding contact of the aviation plug, and the other end is provided with a socket matching the terminal plug.

Optionally, the connecting wires are relay protection test wires.

It can be seen from the above technical solution that the application discloses a test wire harness for a power transformer. The test wire harness includes a plurality of wires. The clamp of the outlet terminal of the power transformer, and the other end is provided with a plug for connecting the terminal of the test equipment. Before performing various tests on the power transformer, the tester uses the clamp on the wire to connect all the wires to the corresponding outlet terminal of the power transformer. Connection, during the test process, it is only necessary to connect different wires to the corresponding test equipment to carry out different tests, without the need to climb up and replace the connecting wires many times, thereby reducing potential safety hazards during the test process.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural diagram of the wire of the test wiring harness that the embodiment of the application provides;

Fig. 2 is the DC resistance test wiring diagram that the application provides;

Fig. 3 is the transformation ratio test wiring diagram provided by the present application;

Fig. 4 is the wiring diagram of the short-circuit impedance test provided by the application;

Fig. 5 is a structural diagram of an auxiliary connection harness provided by another embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

Embodiment one

FIG. 1 is a structural diagram of wires of a test harness provided in an embodiment of the present application.

This embodiment provides a test harness for testing a power transformer. The test harness includes multiple wires, and the structure of each wire is shown in FIG. 1 .

One end of each wire 10 is provided with a clamp 11 for connecting to an outlet terminal of the power transformer 100 , and the other end is provided with a terminal plug 12 for connecting with test equipment.

The number of wires 10 matches the number of outgoing terminals of the power transformer 100. Generally, a high-voltage power transformer has 11 terminals, including 4 high-voltage outgoing terminals, 4 medium-voltage outgoing terminals and 3 low-voltage outgoing terminals. The number of conductors 10 is therefore also eleven.

When performing a DC resistance test on the power transformer 100, it is only necessary to connect the wires connected to the C-phase and the 0-phase of the high-voltage outlet terminal to the DC resistance test equipment, and the other wires can be tested in the air, as shown in FIG. 2 .

When performing the transformation ratio test on the power transformer 100, the wires 10 connected to the high-voltage outgoing line terminal and the low-voltage outgoing line terminal of the power transformer can be connected to the transformation ratio test equipment respectively, and the test can be carried out by suspending the remaining wires, as shown in Figure 3 Show.

When carrying out the short-circuit impedance test on the power transformer 100, the wire connected to the high-voltage outlet terminal of the power transformer is connected to the open-circuit impedance test equipment, and then the other end of the wire connected to the low-voltage terminal is short-circuited to conduct the experiment, as shown in the figure 4.

It can be seen from the above technical solution that this embodiment provides a test harness for a power transformer, the test harness includes a plurality of wires, the number of wires matches the number of outlet terminals of the power transformer, and one end of the wires is provided with a The clamp of the outlet terminal of the power transformer, and the other end is provided with a plug for connecting the terminal of the test equipment. Before performing various tests on the power transformer, the tester uses the clamp on the wire to connect all the wires to the corresponding outlet terminal of the power transformer. In the test process, it is only necessary to connect different wires to the corresponding test equipment to carry out different tests without having to climb up and replace the connecting wires many times, thus reducing the safety hazards in the test process.

In this application, the wire is preferably a relay protection test line. Considering that the test voltage is low and the test current is small when testing the power transformer, the selection of a 2.5 square millimeter relay protection test line can meet the requirements, and also The cost problem caused by the selection of thicker relay protection test wires is avoided.

Embodiment two

Fig. 2 is a schematic diagram of an auxiliary connection harness provided by another embodiment of the present application.

When testing power transformers, the terminals of some test equipment use aviation sockets, such as 3628D transformation ratio tester, AQJ-3C transformation ratio tester, BYC-C on-load tap changer tester DCZ3391 type Transformer direct resistance tester, BYCC-3168G on-load tap-changer tester, etc., make it impossible to connect the terminal plug in the above embodiment, so this embodiment provides an auxiliary connection harness, as shown in Figure 5 It is used to connect the above-mentioned test wiring harness to the aviation sockets of the above-mentioned various types of test equipment.

The auxiliary connecting wire harness includes a plurality of connecting wires 20 and aviation plugs 30, and the connecting wires 20 also use 2.5 square millimeter relay protection test wires. One end of the plurality of connecting wires 20 is connected to the corresponding contacts of the aviation plug 30 , which can be connected by welding during actual processing. The other end of each connection wire 20 is provided with a socket 21 matching with the terminal plug 12 .

When it is necessary to use the above-mentioned test equipment provided with aviation sockets to carry out corresponding tests on power transformers, it is only necessary to connect the aviation plug 30 of the auxiliary connection harness with the aviation socket of the test equipment, and then connect the socket 21 with the previous embodiment. The test can be carried out by connecting the terminal plugs 12 of the corresponding wires 10 in the provided test harness.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the present application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. a test wire harness for power transformer, is characterized in that, comprises many wires, wherein:

The quantity of the quantity of described wire and the outlet terminal of described power transformer matches;

One end of described wire is provided with wire clamp for connecting described outlet terminal, the other end is provided with binding post plug for joint test equipment.

2. test wire harness as claimed in claim 1, it is characterized in that, the quantity of described wire is 11, is respectively used to 4 high-voltage outlet terminals, 4 middle extrusion line terminals, 3 low voltage outlet terminals that connect described power transformer.

3. test wire harness as claimed in claim 1, it is characterized in that, described wire is relay protection test line.

4. test wire harness as claimed in claim 3, it is characterized in that, described relay protection test line is 2.5 square millimeters of relay protection test lines.

5. the test wire harness as described in any one of Claims 1 to 4, is characterized in that, also comprises assistant connection wire bundle, wherein:

Described assistant connection wire bundle comprises many and connects wire and aviation plug;

One end of described connection wire is connected with the corresponding contacts of described aviation plug, the other end is provided with the combination hub matched with described binding post plug.

6. test wire harness as claimed in claim 5, it is characterized in that, described connection wire is relay protection test line.