CN211505845U - An automatic polarity detection device - Google Patents

Abstract

An automatic polarity detection device includes a host connected to the primary side of a current transformer and a slave connected to the secondary side of the current transformer. The host is equipped with three current output terminals A, B and C. During the test, these three terminals are respectively connected to the primary current input terminal of the current transformer, and the slave input terminal is connected to the output terminal of the secondary side of the current transformer. When the host injects high-precision pulse current into the primary side of the current transformer, the polarity of the current transformer is judged by the slave detecting the direction of the induced pulse current on the secondary side. The utility model has the advantages that the tester only needs to use the slave machine to measure the induced pulse current in each winding of the secondary side of the current transformer in turn to judge the polarity of the current transformer, and the slave machine automatically displays the polarity and has a voice prompt. Simple and reliable, short test time, one person can quickly complete the work of polarity detection, reducing the workload of on-site polarity test. The constant current output mode is adopted, with strong load capacity and stable and reliable operation.

Description

An automatic polarity detection device

technical field

The utility model relates to the technical field of electric equipment, in particular to an automatic polarity detection device.

Background technique

In the operation and maintenance of the power system, it is necessary to determine the polarity of the current transformer. The traditional current transformer polarity detection mostly adopts the battery method. In this method, the test power supply is artificially controlled, and the contact and disconnection times are often irregular, and the safety and efficiency are low. In addition, the traditional battery method requires the test power-on point and the test observation point to work at the same time. There are objects isolated or far apart between the two operating points, which is easy to cause asynchrony and other phenomena, resulting in unclear test results and errors, and the test pulse current amplitude The value is affected by the contact resistance of the wiring and the remaining power of the battery. If the number of times of adding the amount is too many, it will easily lead to a decrease in the continuous discharge capacity of the power supply battery and affect the test result.

Utility model content

The purpose of the present invention is to provide an automatic polarity detection device of a current transformer, which aims to improve the existing problems mentioned above.

The utility model 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 a transformer and a slave connected to the secondary side of the transformer;

The host includes a casing and a test control module, a pulse signal generation module, a signal output module, a signal conditioning module and a power conversion circuit in the casing. The signal conditioning module is connected to the test control module, and the test control module is connected to the pulse signal generation module. The pulse signal generation module Connect the signal output module, the signal output module is connected to the primary side of the current transformer, and sends a test command to the device.

The slave machine includes a casing, a measurement module and a power conversion circuit in the casing.

The measurement module is connected to the secondary side of the transformer.

The host also includes a soft keyboard and indicator lights, which are installed outside the shell of the host and are connected to the power conversion circuit test control module for operating and displaying the pulse output phase, period and peak value.

The slave also includes a power key and an indicator light, which are installed outside the slave casing and are connected to the power conversion circuit and the measurement module for displaying the test results.

The host casing is provided with multiple output terminals, and multiple ports of the test control module are connected to multiple output terminals on the host casing, and are connected to a single current transformer to be measured or multiple currents to be measured through the multiple output terminals. Multiple primary side connections of the transformer.

The slave casing is provided with two output terminals, which are connected to the secondary side of the current transformer to be measured.

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

The slave includes a slave battery in the slave housing, and the slave battery supplies power to the measurement module.

Both the master and the slave are provided with waterproof casings.

The advantages of the utility model:

The utility model adopts an automatic polarity detection device, and the host has the function of data interaction with the slave, which can not only issue test instructions to make the slave execute under control, but also display various data in the execution process through indicator lights, such as : Output phase, pulse period, pulse peak value, etc., which are much more powerful than the multimeter or pointer type instrument used in the prior art battery method. In addition, the connection with the soft keyboard is realized, and the soft keyboard has functions such as operation output phase, pulse period, pulse peak value, etc., which solves the technical problem of lack of data interaction function in the prior art. The test pulse can be sent manually or automatically. The sending period and peak value of the pulse can be set freely, and the output can be three-phase or single-phase. The tester does not need to send out test pulses manually, and one tester can complete the polarity test work. If multiple slaves are used, multiple testers can test the polarity at the same time, and the test efficiency will be greatly improved. The slave machine automatically displays the polarity and has a voice prompt. The device is not limited by the length of the primary wiring and the contact resistance. It adopts the constant current output method, with strong load capacity and stable and reliable work. A magnet is installed inside the slave machine, and the tester can attach the slave machine to the surface of the panel cabinet, which is convenient for on-site wiring and testing.

Description of drawings

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

Fig. 1 is the structural representation of automatic polarity detection device;

Figure 2 is the wiring diagram of the polarity test site;

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

Detailed ways

Example 1

The utility model 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 a transformer and a slave connected to the secondary side of the transformer;

The host includes a casing and a test control module, a pulse signal generation module, a signal output module, a signal conditioning module and a power conversion circuit in the casing. The signal conditioning module is connected to the test control module, and the test control module is connected to the pulse signal generation module. The pulse signal generation module Connect the signal output module, the signal output module is connected to the primary side of the current transformer, and sends a test command to the device.

The slave machine includes a casing, a measurement module and a power conversion circuit in the casing.

The measurement module is connected to the secondary side of the transformer.

The host also includes a soft keyboard and indicator lights, which are installed outside the shell of the host and are connected to the power conversion circuit test control module for operating and displaying the pulse output phase, period and peak value.

The slave also includes a power key and an indicator light, which are installed outside the slave casing and are connected to the power conversion circuit and the measurement module for displaying the test results.

The host casing is provided with multiple output terminals, and multiple ports of the test control module are connected to multiple output terminals on the host casing, and are connected to a single current transformer to be measured or multiple currents to be measured through the multiple output terminals. Multiple primary side connections of the transformer.

The slave casing is provided with two output terminals, which are connected to the secondary side of the current transformer to be measured.

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

The slave includes a slave battery in the slave housing, and the slave battery supplies power to the measurement module.

Both the master and the slave are provided with waterproof casings.

Example 2

The utility model 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 a transformer and a slave connected to the secondary side of the transformer;

The host includes a casing and a test control module, a pulse signal generation module, a signal output module, a signal conditioning module and a power conversion circuit in the casing. The signal conditioning module is connected to the test control module, and the test control module is connected to the pulse signal generation module. The pulse signal generation module Connect the signal output module, the signal output module is connected to the primary side of the current transformer, and sends a test command to the device.

The slave machine includes a casing, a measurement module and a power conversion circuit in the casing.

The measurement module is connected to the secondary side of the transformer.

The host also includes a soft keyboard and indicator lights, which are installed outside the shell of the host and are connected to the power conversion circuit test control module for operating and displaying the pulse output phase, period and peak value.

The slave also includes a power key and an indicator light, which are installed outside the slave casing and are connected to the power conversion circuit and the measurement module for displaying the test results.

The host casing is provided with multiple output terminals, and multiple ports of the test control module are connected to multiple output terminals on the host casing, and are connected to a single current transformer to be measured or multiple currents to be measured through the multiple output terminals. Multiple primary side connections of the transformer.

The slave casing is provided with two output terminals, which are connected to the secondary side of the current transformer to be measured.

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

Example 3

The utility model 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 a transformer and a slave connected to the secondary side of the transformer;

The host includes a casing and a test control module, a pulse signal generation module, a signal output module, a signal conditioning module and a power conversion circuit in the casing. The signal conditioning module is connected to the test control module, and the test control module is connected to the pulse signal generation module. The pulse signal generation module Connect the signal output module, the signal output module is connected to the primary side of the current transformer, and sends a test command to the device.

The slave machine includes a casing, a measurement module and a power conversion circuit in the casing.

The measurement module is connected to the secondary side of the transformer.

The host also includes a soft keyboard and indicator lights, which are installed outside the shell of the host and are connected to the power conversion circuit test control module for operating and displaying the pulse output phase, period and peak value.

The slave also includes a power key and an indicator light, which are installed outside the slave casing and are connected to the power conversion circuit and the measurement module for displaying the test results.

The host casing is provided with multiple output terminals, and multiple ports of the test control module are connected to multiple output terminals on the host casing, and are connected to a single current transformer to be measured or multiple currents to be measured through the multiple output terminals. Multiple primary side connections of the transformer.

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

The slave includes a slave battery in the slave housing, and the slave battery supplies power to the measurement module.

Claims (10)

1. an automatic polarity detection device, it is characterized in that: described automatic polarity detection device, comprises the host computer that is connected on the primary side of the transformer and the slave that is connected to the secondary side of the transformer; The host includes a casing and a test control module, a pulse signal generation module, a signal output module, a signal conditioning module and a power conversion circuit in the casing. The signal conditioning module is connected to the test control module, and the test control module is connected to the pulse signal generation module. The pulse signal generation module Connect the signal output module, the signal output module is connected to the primary side of the current transformer, and sends a test command to the device. 2 . The automatic polarity detection device according to claim 1 , wherein the slave machine comprises a casing and a measurement module and a power conversion circuit in the casing. 3 . 3. The automatic polarity detection device according to claim 2, wherein the measurement module is connected to a transformer. 4. The automatic polarity detection device according to claim 1, wherein the host also comprises a soft keyboard and an indicator light, which are installed outside the host shell and are connected with the power conversion circuit test control module for operating and Displays pulse output phase, period and peak value. 5. The automatic polarity detection device according to claim 1, wherein the slave also comprises a power key and an indicator light, which are installed outside the slave housing and are connected with the power conversion circuit and the measurement module, and are used for Display test results. 6 . The automatic polarity detection device according to claim 4 , wherein the main body casing is provided with a plurality of output terminals, and the plurality of ports of the test control module are connected to the plurality of output terminals on the main body casing, 6 . It is connected with a single current transformer under test or with multiple primary sides of multiple current transformers under test through multiple output terminals. 7 . The automatic polarity detection device according to claim 1 , wherein the slave casing is provided with two output terminals, which are connected to the secondary side of the current transformer to be measured. 8 . 8. The automatic polarity detection device according to claim 1, wherein the host comprises a host battery in the host shell, and the host battery supplies power for the test control module, the pulse signal generation module, the signal output module and the signal conditioning module . 9 . The automatic polarity detection device according to claim 1 , wherein the slave includes a slave battery in the slave housing, and the slave battery supplies power to the measurement module. 10 . 10 . The automatic polarity detection device according to claim 1 , wherein the master and the slave are provided with waterproof casings. 11 .

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