CN106680609A - Automatic line changing device for power transformer routine tests - Google Patents

Abstract

The invention relates to a wire changing device, in particular to an automatic wire changing device for conventional tests of power transformers. The housing is equipped with a high-voltage end control motor and a low-voltage end control motor. The high-voltage end control motor controls the on-off of the high-voltage terminal by controlling the high-voltage double-knife switch. The low-voltage end control motor is controlled by controlling the low-voltage double-knife switch. The on-off of the low-voltage terminal; the outer end of the housing is respectively equipped with a control panel and a wireless transmitter, and the control panel is equipped with an electronic voltmeter and an ammeter; For the purpose of line operation, multiple test items can be tested with only one connection, which reduces the number of times testers climb up and down the transformer.

Description

Power Transformer Routine Test Automatic Line Change Device

technical field

The invention relates to a wire changing device, in particular to an automatic wire changing device for routine tests of power transformers.

Background technique

Power transformers are one of the most important power equipment in power plants, substations and power consumption departments. Conducting electrical tests on power transformers is an important measure to ensure the safe operation of power transformers. Usually, the test equipment adopts the method of directly connecting the test line to the transformer body. The connection is tested, and when testing different test items, it is necessary to manually change the test wiring and repeatedly climb up and down the transformer equipment, resulting in low work efficiency, inconvenient operation, and potential safety hazards.

Contents of the invention

In order to solve the deficiencies in the above-mentioned technical problems, the object of the present invention is to provide an automatic wire changing device for routine testing of power transformers, which is easy to operate and can greatly improve work efficiency.

The technical scheme that the present invention adopts for solving its technical problem is:

The automatic wire changing device for routine tests of power transformers includes a housing, the upper end of the housing is provided with a high-voltage terminal and a low-voltage terminal, the outer end of the housing is provided with a protective ground wire and a working ground wire, and the inside of the housing is provided with a high-voltage end control motor. and the low-voltage end control motor, the high-voltage end control motor controls the on-off of the high-voltage terminal by controlling the high-voltage double-knife switch, and the low-voltage end control motor controls the on-off of the low-voltage terminal by controlling the low-voltage double-knife switch; A control panel and a wireless transmitter are respectively provided at the terminal, and an electronic voltmeter and an ammeter are arranged on the control panel.

Further preferably, the high-voltage terminals are divided into two groups, 4 in each group, and the low-voltage terminals are divided into two groups, 3 in each group; there are 4 control motors at the high-voltage end, and 3 control motors at the low-voltage end.

Further preferably, a grounding motor is also included, and the grounding motor controls the on-off of the working ground wire through the grounding link.

Further preferably, the housing is 1 meter high, 0.6 meters long, and 0.6 meters wide.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention is simple in structure and easy to operate, and realizes the purpose of reducing the line-changing operation of power transformer test items. Only one connection is needed to test multiple test items, and the number of times testers climb up and down the transformer is reduced.

2. The control panel is simple and clear, and easy to operate. It is controlled by the electric mechanism to improve the speed and efficiency of line change.

3. There are electronic voltmeters and ammeters on the control panel, which can monitor the test voltage and current in real time. When the voltage and current exceed the limit value, the internal protection will cut off the power in time to protect the test equipment.

4. The device is equipped with a wireless transmitter, which can be operated remotely to ensure the safety of the test personnel.

Description of drawings

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

In the figure: 1. Low-voltage terminal; 2. Control panel; 3. Housing; 4. High-voltage end control motor; 5. Grounding motor; 6. Low-voltage end control motor; 7. High-voltage terminal.

detailed description

Embodiments of the present invention are further described below in conjunction with the accompanying drawings:

As shown in Figure 1, the automatic wire changer for conventional tests of power transformers according to the present invention includes a housing 3, the upper end of the housing 3 is provided with a high-voltage terminal 7 and a low-voltage terminal 1, and the outer end of the housing 3 is provided with a protective ground wire and the working ground wire. The housing 3 is provided with a high-voltage end control motor 4 and a low-voltage end control motor 6. The high-voltage end control motor 4 controls the on-off of the high-voltage terminal 7 by controlling the high-voltage double-knife switch, and the low-voltage end controls the motor. 6. Control the on-off of the low-voltage terminal 1 by controlling the low-voltage double-knife switch; the outer end of the housing 3 is respectively equipped with a control panel 2 and a wireless transmitter, and the control panel 2 is equipped with an electronic voltmeter and an ammeter.

Among them, the high-voltage terminal 7 is divided into two groups, 4 in each group, and the low-voltage terminal 1 is divided into two groups, 3 in each group; the high-voltage end control motor 4 is 4, and the low-voltage end control motor 6 is 3; The grounding motor 5 controls the on-off of the working ground wire through the grounding link; the housing 3 is 1 meter high, 0.6 meters long, and 0.6 meters wide.

Concrete use process of the present invention:

By operating the button on the control panel 2 to operate its own internal motor mechanism, the purpose of automatically changing the wiring mode of different test items is realized. Before the test starts, it is only necessary to connect the test line to the transformer through this device. The control panel 2 is equipped with Transformer high voltage value group measurement, transformer low voltage value group measurement, transformer transformation ratio measurement, transformer on-load tap changer measurement, transformer winding deformation impedance method measurement five function buttons, after the test starts, after pressing the control button, the motor will The command action can meet the test requirements of different tests such as three-phase test, single-phase test, three-phase ground protection, single-phase ground protection, etc., and meet the needs of five test items.

Claims (4)

1. A power transformer routine test automatic wire changing device, comprising a housing (3), is characterized in that the upper end of the housing (3) is provided with a high-voltage terminal (7) and a low-voltage terminal (1), and the housing (3) ) is provided with a protective ground wire and a working ground wire, and the housing (3) is provided with a high-voltage end control motor (4) and a low-voltage end control motor (6). The high-voltage end control motor (4) controls the high-voltage dual The knife switch controls the on-off of the high-voltage terminal (7), and the low-voltage side controls the motor (6) to control the on-off of the low-voltage terminal (1) by controlling the low-voltage double knife switch; A control panel (2) and a wireless transmitter are arranged, and an electronic voltmeter and an ammeter are arranged on the control panel (2). 2. The automatic line changing device for power transformer routine test according to claim 1, characterized in that, the high-voltage terminal (7) is divided into two groups, each group of 4, and the low-voltage terminal (1) is divided into two groups, each 3 groups; 4 high-voltage end control motors (4), and 3 low-voltage end control motors (6). 3. The automatic wire changing device for routine tests of power transformers according to claim 1, further comprising a grounding motor (5), the grounding motor (5) controlling the on-off of the working ground wire through the grounding link. 4. The automatic wire changing device for routine tests of power transformers according to claim 1, characterized in that the housing (3) is 1 meter high, 0.6 meters long, and 0.6 meters wide.