阅读说明：本技术 便携式无线电流互感器极性测试装置 (Portable wireless current transformer polarity testing device ) 是由 杨正 赵肖雄 杜占科 张大宝 吴治勇 韩长远 于勇超 王洪新 张章 刘杰 于 2019-11-06 设计创作，主要内容包括：本发明涉及电流互感器极性测试技术领域,是一种便携式无线电流互感器极性测试装置,包括电流产生单元和极性显示单元,电流产生单元包括无线接收模块、电源控制模块、第一输入线夹、第二输入线夹和第一电源；所述极性显示单元包括第一绝缘壳体,第一绝缘壳体上设有手动测试按钮和至少一个极性显示模块,在第一绝缘壳体内设有控制模块、继电器、第二电源和无线发送模块。本发明通过无线发送模块和无线接收模块实现电流产生单元和极性显示单元之间通信,无需现场接线,并且按动手动测试按钮即可进性极性测量,从而单人即可完成测试,无需其他人员配合,简化测试流程及人员；本发明还同时测量多个绕组,减少了测试工作量,节省测试时间。(The invention relates to the technical field of current transformer polarity test, in particular to a portable wireless current transformer polarity test device which comprises a current generation unit and a polarity display unit, wherein the current generation unit comprises a wireless receiving module, a power supply control module, a first input wire clamp, a second input wire clamp and a first power supply; the polarity display unit comprises a first insulating shell, a manual test button and at least one polarity display module are arranged on the first insulating shell, and a control module, a relay, a second power supply and a wireless sending module are arranged in the first insulating shell. According to the invention, the communication between the current generation unit and the polarity display unit is realized through the wireless sending module and the wireless receiving module, no field wiring is needed, and the measurement of the polarity of the current can be carried out by pressing the manual test button, so that the test can be completed by one person without the cooperation of other persons, and the test flow and the personnel are simplified; the invention also measures a plurality of windings simultaneously, reduces the testing workload and saves the testing time.)

1. A portable wireless current transformer polarity testing device is characterized by comprising a current generating unit and a polarity display unit; the current generation unit comprises a wireless receiving module, a power supply control module, a first input wire clamp, a second input wire clamp and a first power supply, wherein the first input wire clamp, the first power supply, the power supply control module and the second input wire clamp are sequentially connected in series, the first power supply is connected with the wireless receiving module, and the wireless receiving module is connected with the power supply control module; the polarity display unit comprises a first insulation shell, a manual test button and at least one polarity display module are arranged on the first insulation shell, a control module, a relay, a second power supply and a wireless sending module are arranged in the first insulation shell, the second power supply is connected with the control module and the normally open contact of the relay respectively, and the control module is connected with the relay coil, the normally open contact of the relay, the wireless sending module and the manual test button respectively.

2. The portable wireless current transformer polarity testing device of claim 1, wherein the polarity display module comprises an ammeter, a first light emitting diode, and a second light emitting diode.

3. The portable wireless current transformer polarity testing device of claim 2, wherein the polarity display unit further comprises a set of output terminals corresponding to the polarity display modules in number one to one, the set of output terminals is disposed on the first insulating housing, the set of output terminals comprises a first output terminal and a second output terminal, two ends of the ammeter are respectively connected to the first output terminal and the second output terminal, an anode of the first light emitting diode is connected to the first output terminal, a cathode of the first light emitting diode is connected to the second output terminal, a cathode of the second light emitting diode is connected to the first output terminal, and an anode of the second light emitting diode is connected to the second output terminal.

4. The portable radio current transformer polarity test device of claim 1, 2 or 3, wherein the polarity display unit further comprises a second power control switch, an automatic test button, an automatic stop button and a reset button, the second power control switch, the automatic test button, the automatic stop button and the reset button are disposed on the first insulating housing, the automatic test button, the automatic stop button and the reset button are all connected with the control module, and the second power control switch is connected with a second power supply.

5. The portable wireless current transformer polarity testing device of claim 1, 2 or 3, wherein the current generating unit further comprises a second insulating housing, the wireless receiving module, the power control module and the first power source are all located inside the second insulating housing, and the first input clip and the second input clip are all located outside the second insulating housing.

6. The portable wireless current transformer polarity testing device of claim 4, wherein the current generating unit further comprises a second insulating housing, the wireless receiving module, the power control module and the first power source are all located inside the second insulating housing, and the first input clip and the second input clip are all located outside the second insulating housing.

7. The portable wireless current transformer polarity testing device of claim 5, wherein the current generating unit further comprises a first power control switch for controlling the first power source and a power supply monitoring indicator lamp for monitoring whether the first power source starts to supply power, the first power source and the power supply monitoring indicator lamp are disposed on the second insulating housing, and the first input wire clamp, the first power control switch, the first power source, the power control module, the power supply monitoring indicator lamp and the second input wire clamp are sequentially connected in series.

8. The portable wireless current transformer polarity testing device of claim 6, wherein the current generating unit further comprises a first power control switch for controlling the first power source and a power supply monitoring indicator lamp for monitoring whether the first power source starts to supply power, the first power source and the power supply monitoring indicator lamp are disposed on the second insulating housing, and the first input wire clamp, the first power control switch, the first power source, the power control module, the power supply monitoring indicator lamp and the second input wire clamp are sequentially connected in series.

Technical Field

The invention relates to the technical field of current transformer polarity test, in particular to a portable wireless current transformer polarity test device.

Background

The current transformer is an important electrical device of an electric power system, plays roles of isolating a high-voltage system and a low-voltage system and converting high-voltage quantity into low-voltage quantity, and has extremely important significance on normal work of devices such as protection, measurement and metering of the system if the wiring of the current transformer is correct. The current transformer polarity error will cause the protection malfunction such as main transformer differential, bus protection differential, line longitudinal differential, etc., and simultaneously also affect the functions such as measurement, metering, etc.

At present, the current means for measuring the polarity of the current transformer mainly comprises a current transformer characteristic tester, a voltmeter for testing the polarity and the like. The method for testing the polarity of the voltmeter is generally suitable for the supplementary verification of the polarity of the current transformer, and the method for testing the polarity of the voltmeter mainly has the problems of complex tool preparation process, troublesome operation, requirement of cooperative cooperation of two persons and the like.

Disclosure of Invention

The invention provides a portable wireless current transformer polarity testing device, overcomes the defects of the prior art, and can effectively solve the problems of complex testing preparation process, time and labor waste and low efficiency of the existing voltmeter polarity testing method.

The technical scheme of the invention is realized by the following measures: a portable wireless current transformer polarity testing device comprises a current generating unit and a polarity display unit; the current generation unit comprises a wireless receiving module, a power supply control module, a first input wire clamp, a second input wire clamp and a first power supply, wherein the first input wire clamp, the first power supply, the power supply control module and the second input wire clamp are sequentially connected in series, the first power supply is connected with the wireless receiving module, and the wireless receiving module is connected with the power supply control module; the polarity display unit comprises a first insulation shell, a manual test button and at least one polarity display module are arranged on the first insulation shell, a control module, a relay, a second power supply and a wireless sending module are arranged in the first insulation shell, the second power supply is connected with the control module and the normally open contact of the relay respectively, and the control module is connected with the relay coil, the normally open contact of the relay, the wireless sending module and the manual test button respectively.

The following is further optimization or/and improvement of the technical scheme of the invention:

the polarity display module comprises an ammeter, a first light emitting diode and a second light emitting diode.

The polarity display unit further comprises output wiring end groups which are the same in quantity and correspond to the polarity display modules one to one, the output wiring end groups are arranged on the first insulating shell, each output wiring end group comprises a first output wiring end and a second output wiring end, two ends of the ammeter are connected with the first output wiring ends and the second output wiring ends respectively, the anode of the first light-emitting diode is connected with the first output wiring ends, the cathode of the first light-emitting diode is connected with the second output wiring ends, the cathode of the second light-emitting diode is connected with the first output wiring ends, and the anode of the second light-emitting diode is connected with the second output wiring ends.

The polarity display unit further comprises a second power supply control switch, an automatic test button, an automatic stop button and a reset button, the second power supply control switch, the automatic test button, the automatic stop button and the reset button are arranged on the first insulating shell, the automatic test button, the automatic stop button and the reset button are all connected with the control module, and the second power supply control switch is connected with a second power supply.

The current generation unit further comprises a second insulating shell, the wireless receiving module, the power control module and the first power supply are all located inside the second insulating shell, and the first input wire clamp and the second input wire clamp are all located outside the second insulating shell.

The current generation unit further comprises a first power control switch for controlling the first power supply and a power supply monitoring indicator lamp capable of judging whether the first power supply starts to supply power, the first power supply and the power supply monitoring indicator lamp are arranged on the second insulating shell, and the first input wire clamp, the first power control switch, the first power supply, the power supply control module, the power supply monitoring indicator lamp and the second input wire clamp are sequentially connected in series.

The polarity testing device is reasonable and compact in structure, convenient to carry and convenient and flexible to use, and realizes communication between the current generating unit and the polarity display unit through the wireless sending module and the wireless receiving module, so that polarity testing is finished, and a traditional mode of measuring by dragging a longer testing line is avoided; the invention has convenient installation, does not need on-site wiring, and can carry out sexual polarity measurement by pressing the manual test button, thereby completing the test by a single person without the cooperation of other personnel and simplifying the test flow and personnel; the invention also measures a plurality of windings simultaneously, reduces the testing workload and saves the testing time.

Drawings

Fig. 1 is a schematic circuit diagram of a current generating unit according to the present invention.

Fig. 2 is a schematic circuit diagram of a polarity display unit according to the present invention.

Fig. 3 is a schematic perspective view of a current generating unit according to the present invention.

Fig. 4 is a schematic perspective view of a polar display unit according to the present invention.

FIG. 5 is a schematic circuit diagram of the polarity test of the present invention.

The codes in the figures are respectively: the test device comprises a first input wire clamp 1, a second input wire clamp 2, a first insulating shell 3, a manual test button 4, an ammeter 5, a first light emitting diode 6, a second light emitting diode 7, a first output terminal 8, a second output terminal 9, an automatic test button 10, an automatic stop button 11, a reset button 12, a second insulating shell 13, a first power control switch 14, a power supply monitoring indicator lamp 15, a second power control switch 16 and a second power indicator lamp 17.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 3 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.

The invention is further described with reference to the following examples and figures:

as shown in fig. 1, 2, 3, 4, and 5, the portable wireless current transformer polarity testing apparatus includes a current generating unit and a polarity display unit; the current generation unit comprises a wireless receiving module, a power supply control module, a first input wire clamp 1, a second input wire clamp 2 and a first power supply, wherein the first input wire clamp 1, the first power supply, the power supply control module and the second input wire clamp 2 are sequentially connected in series, the first power supply is connected with the wireless receiving module, and the wireless receiving module is connected with the power supply control module; the polarity display unit comprises a first insulation shell 3, a manual test button 4 and at least one polarity display module are arranged on the first insulation shell 3, a control module, a relay, a second power supply and a wireless sending module are arranged in the first insulation shell 3, the second power supply is connected with the control module and a normally open contact of the relay respectively, and the control module is connected with a relay coil, the normally open contact of the relay, the wireless sending module and the manual test button 4 respectively.

The polarity display unit is connected with the secondary side of the tested current transformer and used for sending pulse current to the current generation unit and displaying a polarity test result of the tested current transformer after the current generation unit generates current; the manual test button 4 is used for sending a test signal to the control module by a tester; the control module is a conventional known technology, and can be an STC89C52RC microcontroller, and is used for receiving a test signal sent by a manual test button 4, controlling a normally open contact of a relay to complete one-time pull-in according to the test signal, and sending a working command to a current generation unit through a wireless sending module according to pulse current generated by pull-in of the relay; the wireless sending module can be a PT2262 wireless transmitting module; the polarity display module can be provided with a plurality of windings, when the secondary side of the tested current transformer is provided with a plurality of windings, the polarity display module can be convenient for simultaneously carrying out polarity test, and can comprise an ammeter 5, a light emitting diode and the like and be used for displaying the polarity test result.

The current generating unit is connected with the primary side of the tested current transformer and is used for generating current so that a complete loop is formed among the tested current transformer, the current generating unit and the polarity display unit; the wireless receiving module can be a PT2272 wireless receiving module and is used for communication between the current generating unit and the polarity display unit; the size of the second power supply is set by actual conditions and can be 5 volts; the power supply control module is a conventional known technology, can be a relay and is used for controlling whether a circuit of the current generation unit is conducted or not and whether current is generated or not, if the power supply control module is the relay, the wireless receiving module conducts electricity to a relay coil after performing digital-to-analog conversion on a received signal, so that a normally open contact of the relay is closed, and a primary side of a current transformer to be tested is conducted to generate current; the first input clamp 1 and the second input clamp 2 are used for clamping two ends of a primary side of a tested current transformer.

As shown in fig. 1, 2 and 5, the using process of the invention is as follows:

1. clamping one end of a primary side of a tested current transformer, close to a bus, by a first input wire clamp 1, and clamping the other end of the primary side of the tested current transformer by a second input wire clamp 2;

2. respectively connecting a polarity display module with two ends of the secondary side of the tested current transformer;

3. a tester presses the manual test button 4 to send a test signal to the control module, the control module controls the normally open contact of the relay to complete one-time actuation, and the control module sends a working command to the current generation unit through the wireless sending module;

4. the wireless receiving module receives the working command and sends the working command to the power supply control module, and the power supply control module controls the conduction between the primary sides of the current transformer to be tested to generate current, so that a complete loop is formed among the current transformer to be tested, the current generating unit and the polarity display unit;

5. and the staff observes the polarity display module to determine the polarity of the current transformer to be tested.

The polarity testing device is simple in structure, convenient to carry and convenient and flexible to use, and the communication between the current generating unit and the polarity display unit is realized through the wireless sending module and the wireless receiving module, so that the polarity test is completed, and the traditional mode of carrying out measurement by dragging a longer test line is avoided; the invention is convenient to install, does not need on-site wiring, and can carry out the sexual polarity measurement by pressing the manual test button 4, so that the test can be finished by a single person without the cooperation of other personnel, and the test flow and the personnel are simplified; the invention also measures a plurality of windings simultaneously, reduces the testing workload and saves the testing time.

The polarity testing device of the portable wireless current transformer can be further optimized or/and improved according to actual needs:

as shown in fig. 2 and 4, the polarity display module includes an ammeter 5, a first light emitting diode 6 and a second light emitting diode 7.

When the ammeter 5 is used for displaying a polarity test result, if the pointer of the ammeter 5 deflects leftwards, the polarity of the tested current transformer is positive, and if the pointer of the ammeter 5 deflects rightwards, the polarity of the tested current transformer is positive; when the polarity test result is displayed by using the first light emitting diode 6 and the second light emitting diode 7, the first light emitting diode 6 and the second light emitting diode 7 respectively indicate the positive polarity and the negative polarity.

As shown in fig. 2 and 4, the polarity display unit further includes an output terminal group corresponding to the polarity display modules in the same number one to one, the output terminal group is disposed on the first insulating housing 3, the output terminal group includes a first output terminal 8 and a second output terminal 9, two ends of the ammeter 5 are respectively connected to the first output terminal 8 and the second output terminal 9, an anode of the first light emitting diode 6 is connected to the first output terminal 8, a cathode of the first light emitting diode 6 is connected to the second output terminal 9, a cathode of the second light emitting diode 7 is connected to the first output terminal 8, and an anode of the second light emitting diode 7 is connected to the second output terminal 9.

The output terminal groups are arranged on the first insulating shell 3, the number of the output terminal groups is the same as that of the polarity display modules, the output terminal groups correspond to the polarity display modules one by one, and the output terminal groups are convenient to be connected with the secondary side of the tested current transformer during use.

As shown in fig. 2 and 4, the polarity display unit further includes a second power control switch 16, an automatic test button 10, an automatic stop button 11, and a reset button 12, the second power control switch 16, the automatic test button 10, the automatic stop button 11, and the reset button 12 are disposed on the first insulating housing 3, the automatic test button 10, the automatic stop button 11, and the reset button 12 are all connected to the control module, and the second power control switch 16 is connected to a second power supply.

After the tester presses the automatic test button 10, the tester sends an automatic test signal to the control module, the control module controls the normally open contact interval of the relay to complete the attraction according to the preset automatic test time interval, pulse current is sent to the control module at intervals, and the control module sends a working command to the current generation unit at intervals through the wireless sending module according to the pulse current, so that multiple times of measurement are realized. The reset button 12 is used to reset the control module. The first insulating housing 3 may further be provided with a second power indicator 17.

As shown in fig. 1 and 3, the current generating unit further includes a second insulating housing 13, the wireless receiving module, the power control module and the second power source are all located inside the second insulating housing 13, and the first input terminal 1 and the second input terminal 2 are all located outside the second insulating housing 13.

As shown in fig. 1 and 3, the current generating unit further includes a first power control switch 14 for controlling the first power and a power supply monitoring indicator 15 capable of determining whether the first power starts to supply power, the first power and the power supply monitoring indicator 15 are disposed on the second insulating housing 13, and the first input wire clamp 1, the first power control switch 14, the first power, the power control module, the power supply monitoring indicator 15, and the second input wire clamp 2 are sequentially connected in series.

The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.