阅读说明：本技术 一种自动极性检测装置 (Automatic polarity detection device ) 是由 石磊 徐伟 李兆祺 王起琦 赵楠 齐秀波 张旗 邢天祥 刘超 崔朋 庞天皓 于 于 2019-09-19 设计创作，主要内容包括：一种自动极性检测装置,包括连接在电流互感器一次侧的主机和连接在电流互感器二次侧的从机。主机上装有A、B、C三个电流输出端子,测试时这三个端子分别接到电流互感器的一次电流输入端,从机输入端子接到电流互感器二次侧的输出端。当主机向电流互感器一次侧注入高精度脉冲电流时,通过从机检测二次侧的感应脉冲电流的方向来判断电流互感器的极性。本发明优点：测试人员只需要用从机依次在电流互感器二次侧各绕组测量感应的脉冲电流来判断电流互感器的极性,从机自动显示极性并有声音提示。简单可靠,测试时间短,单人可快速完成极性检测的工作,减少现场极性测试的工作量。采用恒流输出方式,带载能力强,工作稳定可靠。(An automatic polarity detection device comprises a host connected to a primary side of a current transformer and a slave connected to a secondary side of the current transformer. A, B, C three current output terminals are installed on the host machine, the three terminals are respectively connected to the primary current input end of the current transformer during testing, and the input terminal of the slave machine is connected to the output end of the secondary side of the current transformer. When the host machine injects high-precision pulse current to the primary side of the current transformer, the polarity of the current transformer is judged by detecting the direction of the induced pulse current on the secondary side of the slave machine. The invention has the advantages that: a tester only needs to measure the induced pulse current at each winding on the secondary side of the current transformer by the slave in sequence to judge the polarity of the current transformer, and the slave automatically displays the polarity and has sound prompt. The method is simple and reliable, the testing time is short, the polarity detection work can be completed rapidly by a single person, and the workload of field polarity testing is reduced. And a constant-current output mode is adopted, so that the loading capacity is high, and the work is stable and reliable.)

1. An automatic polarity detection device, its characterized in that: the automatic polarity detection device comprises a host connected to the primary side of the mutual inductor and a slave connected to the secondary side of the mutual inductor;

The host comprises a shell, a test control module, a pulse signal generation module, a signal output module, a signal regulation module and a power conversion circuit, wherein the test control module, the pulse signal generation module, the signal output module, the signal regulation module and the power conversion circuit are arranged in the shell, the signal regulation module is connected with the test control module, the test control module is connected with the pulse signal generation module, the pulse signal generation module is connected with the signal output module, the signal output module is connected with the primary side of a current transformer, and.

2. The automatic polarity detection device of claim 1, wherein: the slave machine comprises a shell, a measuring module and a power conversion circuit, wherein the measuring module and the power conversion circuit are arranged in the shell.

3. The automatic polarity detection device of claim 1, wherein: the measuring module is connected with the secondary side of the mutual inductor.

4. The automatic polarity detection device of claim 1, wherein: the host machine also comprises a soft keyboard and an indicator light, is arranged outside the host machine shell, is connected with the power supply conversion circuit test control module and is used for operating and displaying the pulse output phase, period and peak value.

5. The automatic polarity detection device of claim 1, wherein: the slave machine also comprises a power key and an indicator light which are arranged outside the slave machine shell, connected with the power conversion circuit and the measuring module and used for displaying the test result.

6. the automatic polarity detection device of claim 1, wherein: the testing control module is connected with the plurality of output terminals on the host shell through the plurality of output terminals and is connected with a single current transformer to be tested or a plurality of primary sides of a plurality of current transformers to be tested.

7. The automatic polarity detection device of claim 1, wherein: and two output terminals are arranged on the slave shell and are connected with the secondary side of the current transformer to be tested.

8. The automatic polarity detection device of claim 1, wherein: the host comprises a host storage battery in a host shell, and the host storage battery supplies power for the test control module, the pulse signal generation module, the signal output module and the signal regulation module.

9. The automatic polarity detection device of claim 1, wherein: the slave machine comprises a slave machine storage battery in the slave machine shell, and the slave machine storage battery supplies power to the measurement module.

10. The automatic polarity detection device of claim 1, wherein: the host and the slave are both provided with waterproof shells.

Technical Field

The invention relates to the technical field of power equipment, in particular to an automatic polarity detection device.

Background

In the operation and maintenance of the power system, the polarity of the current transformer is necessary to be determined. The polarity detection of the traditional current transformer mostly adopts a battery method, the adding amount of a test power supply of the method is artificially controlled, the contact and disconnection time is irregular frequently, and the safety and the efficiency are lower. In addition, the traditional battery method needs to test the electrifying point and the test observation point to work simultaneously, objects are arranged between the two working points to be separated or the distance between the two working points is far, the phenomena of asynchronization and the like are easily caused, the test result is unclear, errors occur, the test pulse current amplitude is influenced by the wiring contact resistance and the battery residual capacity, and if the number of times of adding and repeating at one time is too many, the continuous discharge capacity of the power battery is easily reduced, and the test result is influenced.

Disclosure of Invention

The present invention aims to provide an automatic polarity detection device for a current transformer, which aims to improve the existing problems.

The invention provides an automatic polarity detection device, which is characterized in that: the automatic polarity detection device comprises a host connected to the primary side of the mutual inductor and a slave connected to the secondary side of the mutual inductor;

The host comprises a shell, a test control module, a pulse signal generation module, a signal output module, a signal regulation module and a power conversion circuit, wherein the test control module, the pulse signal generation module, the signal output module, the signal regulation module and the power conversion circuit are arranged in the shell, the signal regulation module is connected with the test control module, the test control module is connected with the pulse signal generation module, the pulse signal generation module is connected with the signal output module, the signal output module is connected with the primary side of a current transformer, and.

The slave machine comprises a shell, a measuring module and a power conversion circuit, wherein the measuring module and the power conversion circuit are arranged in the shell.

The measuring module is connected with the secondary side of the mutual inductor.

The host machine also comprises a soft keyboard and an indicator light, is arranged outside the host machine shell, is connected with the power supply conversion circuit test control module and is used for operating and displaying the pulse output phase, period and peak value.

the slave machine also comprises a power key and an indicator light which are arranged outside the slave machine shell, connected with the power conversion circuit and the measuring module and used for displaying the test result.

The testing control module is connected with the plurality of output terminals on the host shell through the plurality of output terminals and is connected with a single current transformer to be tested or a plurality of primary sides of a plurality of current transformers to be tested.

And two output terminals are arranged on the slave shell and are connected with the secondary side of the current transformer to be tested.

The host comprises a host storage battery in a host shell, and the host storage battery supplies power for the test control module, the pulse signal generation module, the signal output module and the signal regulation module.

The slave machine comprises a slave machine storage battery in the slave machine shell, and the slave machine storage battery supplies power to the measurement module.

The host and the slave are both provided with waterproof shells.

The invention has the advantages that:

the invention adopts an automatic polarity detection device, the host has a data interaction function with the slave, not only can send out a test instruction to enable the slave to execute under a controlled condition, but also can display various data in the execution process through an indicator light, such as: the display function of the output phase, the pulse period, the pulse peak value and the like is much stronger than that of a universal meter or a pointer instrument used in the prior art battery method. In addition, the soft keyboard is connected with the soft keyboard, the soft keyboard has the functions of operation output phase, pulse period, pulse peak value and the like, and the technical problem that the data interaction function is lacked in the prior art is solved. The test pulse can be sent manually or automatically, the sending period and the pulse peak value of the pulse can be set freely, and the three-phase output or the single-phase output can be realized. The tester does not need to send out test pulses manually, one tester can finish polarity test work, if a plurality of slave machines are adopted, a plurality of testers can test the polarity simultaneously, and the test efficiency can be greatly improved. The slave machine automatically displays polarity and has sound prompt, the device is not limited by the length of one-time connection and contact resistance, and a constant current output mode is adopted, so that the load capacity is strong, and the work is stable and reliable. The magnet is arranged in the slave machine, so that a tester can adsorb the slave machine to the surface of the screen cabinet, and the on-site wiring and testing are facilitated.

Drawings

The invention is described in further detail below with reference to the following figures and embodiments:

FIG. 1 is a schematic structural diagram of an automatic polarity detection apparatus;

FIG. 2 is a field wiring diagram for polarity testing;

in the figure, 1 is a master, 2 is a slave, 3 is an output terminal, 4 is a master indicator light area, 5 is a master software panel, 6 is a master power key, 7 is a slave input terminal, 8 is a slave indicator light area, and 9 is a slave power key.

Detailed Description