CN216285660U

CN216285660U - Portable multifunctional current transformer line calibration tester

Info

Publication number: CN216285660U
Application number: CN202120869119.8U
Authority: CN
Inventors: 宋涛; 陈洪才
Original assignee: Shanghai Datun Energy Resources Co Ltd Jiangsu Branch
Current assignee: Shanghai Datun Energy Resources Co Ltd Jiangsu Branch
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2022-04-12
Anticipated expiration: 2031-04-26

Abstract

The utility model relates to the technical field of relay protection debugging, in particular to a portable multifunctional current transformer line calibration tester. This portable multi-functional current transformer school line tester has integrated terminal module, current transformer polarity test module, current transformer school line module, direct current feeder branch road ground connection route selection test module in an organic whole for in current transformer secondary wiring check-up work, convenient to carry, the test is simple, and can accurately judge whether current transformer secondary circuit wiring is correct fast, need tear open when having avoided the debugging, connect the loaded down with trivial details work of current transformer secondary line, make debugging work reach high efficiency, accurate effect.

Description

Portable multifunctional current transformer line calibration tester

Technical Field

The utility model relates to the technical field of relay protection debugging, in particular to a portable multifunctional current transformer line calibration tester.

Background

With the development of power grids, relay protection puts higher requirements on the accuracy of current loop wiring and the polarity of a current transformer. At present, the secondary wiring of the current transformer needs to be disconnected, and when the wiring is recovered, the problem of wire miswiring is inevitable, the normal operation of related equipment is influenced, and potential safety hazards are caused. Therefore, multiple tests with multiple instruments are required to avoid the problem of miswiring. In the actual operation, multiple instruments are inconvenient to carry, and the test process is complicated.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides the portable multifunctional current transformer wire calibration tester, which is convenient to carry and simple to test in the secondary wire calibration work of the current transformer, can quickly and accurately judge whether the secondary circuit wire of the current transformer is correct or not, avoids the complex work of disassembling and connecting the secondary wire of the current transformer during debugging, and ensures that the debugging work achieves the effects of high efficiency and accuracy.

The utility model is realized by the following technical scheme: a portable multifunctional current transformer line calibration tester comprises a tester body shell, a terminal module, a current transformer polarity testing module, a current transformer line calibration module and a direct current feeder branch grounding line selection testing module.

The terminal module comprises 6 wiring terminal polarities +, polarities-, line calibration +, line calibration-, direct current grounding +, and direct current grounding-which are arranged on a panel of the shell of the machine body.

The polarity test module of the current transformer comprises a double-bias ammeter. The positive pole of the ammeter is connected with the polarity + on the terminal module, and the negative pole of the ammeter is connected with the polarity-on the terminal module.

The current transformer line calibration module comprises an on/off indicator lamp, a line calibration power switch, a line calibration circuit board, a battery and a sound board. The positive and negative poles of the battery are connected with the positive and negative poles of the power supply of the sounding board and are connected with the positive and negative poles of the power supply of the line calibration circuit board IN series through the line calibration power switch, the input terminal IN + of the line calibration circuit board is connected with the calibration line + on the terminal module, the input terminal IN-of the line calibration circuit board is connected with the calibration line on the terminal module, and the output terminal of the line calibration circuit board is connected with the input terminal of the sounding board and the on/off indicator lamp terminal.

The direct-current feeder branch circuit grounding line selection testing module comprises a grounding resistor. The grounding resistor is respectively connected with the direct current grounding + and the direct current grounding-on the terminal module.

The utility model has the advantages that the wire calibration tester has simple test in the secondary wiring calibration work of the current transformer, can quickly and accurately judge whether the wiring of the secondary circuit of the current transformer is correct or not, avoids the complex work of disassembling and connecting the secondary wire of the current transformer during debugging and ensures that the debugging work is efficient and accurate. The utility model has the advantages of compact structure, convenient carrying, convenient operation, safety, reliability, economy, practicality and the like, provides powerful guarantee for debugging personnel to correctly wire and safely construct, and improves the working efficiency.

Drawings

FIG. 1 is a schematic view of the external overall structure of the present invention

FIG. 2 is a schematic view of the internal structure of the present invention

FIG. 3 is a schematic side view of the present invention

In the figure: 1. polarity +; 2. polarity-; 3. line calibration +; 4. line calibration-; 5. direct current ground +; 6. direct current ground-; 7. a double-bias ammeter; 8. an on/off indicator light; 9. checking an electrical source switch; 10, a USB output port; a Micro USB charging port; 12. an electric quantity display; 13. an electric quantity detection button; 14. a power supply control circuit board; 15. a line checking circuit board; 16. a battery; 17. acoustic board: 18. and a ground resistor.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

As shown in fig. 1 and 2, a portable multifunctional current transformer line calibration tester includes a tester body shell, a terminal module, a current transformer polarity test module, a current transformer line calibration module, and a dc feeder branch grounding line selection test module.

As shown in fig. 1, the terminal module comprises 6 terminals installed on the panel of the machine body shell, wherein the terminals are respectively a phi 4mm banana panel socket, and the terminals have polarity +1, polarity-2, line calibration +3, line calibration-4, direct current grounding +5 and direct current grounding-6. The current transformer polarity testing module comprises a double-bias ammeter 7. The double-bias ammeter 7 is a 85C1 type direct current double-bias ammeter, is installed in the body shell, and is provided with an observation hole at a position corresponding to the direct current double-bias ammeter 7 for observing the change of the pointer of the ammeter. The positive pole of the ammeter is connected with the polarity + on the terminal module, and the negative pole of the ammeter is connected with the polarity-on the terminal module. When the polarity of the current transformer is tested, the polarity +1 is connected with S1 of the secondary coil of the current transformer, and the polarity-2 is connected with S2 of the secondary coil of the current transformer to form a test loop; the dry battery is connected with the primary side of the current transformer in series to form an analog current loop, the secondary coil of the current transformer generates induced current at the moment of conduction, and the pointer of the double-bias ammeter is deflected by the current. And whether the polarity of the current transformer is correct can be tested according to the anode and cathode of the dry battery, the polarity identification on the current transformer and the direction of the pointer.

As shown in fig. 1 and 2, the current transformer line calibration module includes an on/off indicator light 8, a line calibration power switch 9, a line calibration circuit board 15, a battery 16, and a sound board 17. The on/off indicator light 8 and the line calibration power switch 9 are arranged on the panel of the shell of the tester body. Wherein, the on/off indicator light 8 is a red LED light with the diameter of 6mm and the voltage of 6V, the checking power switch 9 is a full-metal self-locking button switch with the diameter of 12mm, and the button plane is provided with a power indicator light. The school wire circuit board 15, the battery 16 and the sound board 17 are mounted inside the machine body shell. The positive and negative poles of the battery 16 are connected with the positive and negative poles of the power supply of the sounding board 17, and are connected with the positive and negative poles of the power supply of the line calibration circuit board 15 in series through the line calibration power switch 9. The input terminal IN + of the line calibration circuit board 15 is connected with the calibration line +3 on the terminal module, the input terminal IN-of the line calibration circuit board 15 is connected with the calibration line-4 on the terminal module, and the output terminals are respectively connected with the input terminal of the sounding board 17 and the terminals of the on/off indicator light 8. When the current transformer is subjected to line calibration test, if the root of the current transformer is secondarily provided with a grounding line, the grounding point is disconnected; then, the current terminal sliding connecting sheets of the secondary bin of the high-voltage switch cabinet are all disconnected; and then grounding a secondary connecting terminal 1LH-S1 of the current transformer, pressing a tester line calibration power switch, grounding a calibration line-4, and lapping the calibration line +3 on a current transformer side current terminal of a secondary bin of the high-voltage switch cabinet. The on/off indicator light is on, the buzzer sounds, the terminal overlapped by the calibration wire +3 is the wiring of the current transformer 1LH-S1, and the other terminals are not connected. In the process of testing the line calibration of the current transformer, when the secondary circuit of the current transformer is judged to be correctly wired, the complex work of disassembling and connecting the secondary line of the current transformer is avoided, and the debugging work achieves the effects of high efficiency and accuracy.

As shown in fig. 1 and 2, the dc feeder branch ground line selection test module includes a ground resistor 18. The ground resistor 18 is mounted inside the body housing. The ground resistor 18 is connected to dc ground +5 and dc ground-6 on the terminal module, respectively. When the direct current feeder branch circuit grounding line selection test is carried out, the direct current screen feeder switch is disconnected, the direct current grounding-6 is grounded, and the direct current grounding +5 is connected to the positive electrode output by the direct current screen feeder switch; when the direct current screen feeder switch is switched on, the positive power supply of the direct current bus is grounded through the grounding resistor 18, and the direct current screen insulation monitoring device reports that the corresponding feeder branch is grounded. And if the direct current grounding +5 is connected to the negative electrode of the output of the direct current feeder switch, the negative grounding of the feeder branch is reported.

As shown in fig. 2 and 3, in order to further improve the portability of the tester, a power supply control module is additionally installed in the tester. The power control module comprises a power control circuit board 14, a power detection button 13, a power display 12, a Micro USB charging port 11 and a USB output port 10, wherein the power display 12 is a power indicator lamp formed by a plurality of LED lamps and can be replaced by other known display devices. The electric quantity detection button 13, the electric quantity display 12, the Micro USB charging port 11 and the USB output port 10 are installed on a side plate of a tester body shell. The power control circuit board 14 is mounted inside the body case. The battery 16 is a rechargeable battery such as a rechargeable lithium battery or the like. The electric quantity detection button 13, the electric quantity display 12, the Micro USB charging port 11 and the USB output port 10 are all welded on the power control circuit board 14. The B + terminal of the power control circuit board 14 is connected to the positive terminal of the battery 16, and the B-terminal of the power control circuit board 14 is connected to the negative terminal of the battery 16. The USB output port 10 can provide DC5V power output, the load is inserted to automatically start and boost, when the polarity test of the current transformer is carried out, the current transformer can replace a dry battery, and is connected with the primary side of the current transformer in series through a patch cord to form an analog current loop, so that the polarity test of the current transformer is completed. Pressing the electric quantity detection button 13, the electric quantity display 12 displays the residual electric quantity of the battery; the mobile phone charger can charge the lithium battery through the Micro USB charging port 11, and has overcurrent, over-discharge, overvoltage protection and complete machine overheat protection. At idle, the vehicle enters a sleep state after 8 seconds. The power control module further improves the portability of the tester, so that the electric quantity of the tester is more conveniently controlled in the working process.

The foregoing is illustrative of the present invention and its embodiments, and the description is not limiting. The embodiment shown in the drawings is only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, without departing from the spirit of the present invention, a person skilled in the art shall appreciate that the present invention shall not be limited to the embodiments shown in the drawings.

Claims

1. The utility model provides a portable multi-functional current transformer school line tester, includes tester organism shell, its characterized in that: the system also comprises a terminal module, a current transformer polarity test module, a current transformer line calibration module and a direct current feeder branch grounding line selection test module; the terminal module comprises 6 wiring terminals, namely polarity + (1), polarity- (2), wire calibration + (3), wire calibration- (4), direct current grounding + (5) and direct current grounding- (6), which are arranged on a panel of the shell of the machine body; the polarity test module of the current transformer comprises a direct current double-bias ammeter (7) arranged in the body shell, the positive pole of the ammeter is connected with the polarity (1) on the terminal module, and the negative pole of the ammeter is connected with the polarity (2) on the terminal module; the current transformer line calibration module comprises an on/off indicator lamp (8) arranged on a panel of a machine body shell, a line calibration power switch (9), a line calibration circuit board (15), a battery (16) and a sound board (17) which are arranged in the machine body shell; the positive pole and the negative pole of the battery (16) are connected with the positive pole and the negative pole of a power supply of the sounding board (17) and are connected with the positive pole and the negative pole of the power supply of the line calibration circuit board (15) IN series through a line calibration power switch (9), the input terminal IN + of the line calibration circuit board (15) is connected with a calibration line + (3) on the terminal module, the input terminal IN-of the line calibration circuit board (15) is connected with a calibration line- (4) on the terminal module, and the output terminal of the line calibration circuit board (15) is connected with the input terminal of the sounding board (17) and the terminal of an on/off indicator lamp (8); the direct current feeder branch grounding line selection test module comprises a grounding resistor (18) installed inside a machine body shell, and the grounding resistor (18) is connected with a direct current ground (5) and a direct current ground (6) on a terminal module respectively.

2. The portable multifunctional current transformer calibration tester as recited in claim 1, wherein: the wiring terminal is a banana panel socket with the diameter of 4 mm.

3. The portable multifunctional current transformer calibration tester as recited in claim 1, wherein: the direct current double-bias ammeter (7) is an 85C1 type direct current double-bias ammeter.

4. The portable multifunctional current transformer calibration tester as claimed in claim 1 or 3, wherein: and an observation hole for observing the change of the pointer of the ammeter is arranged at the position of the panel corresponding to the direct current double-bias ammeter (7).

5. The portable multifunctional current transformer calibration tester as recited in claim 1, wherein: the on/off indicator lamp (8) is a 6V LED lamp with the diameter of 6 mm.

6. The portable multifunctional current transformer calibration tester as recited in claim 1, wherein: the line calibration power switch (9) is a phi 12mm all-metal self-locking button switch, and a button plane is provided with a power indicator lamp.

7. The portable multifunctional current transformer calibration tester as recited in claim 1, wherein: the battery (16) is a rechargeable battery.

8. The portable multifunctional current transformer calibration tester as recited in claim 7, wherein: the rechargeable battery is a rechargeable lithium battery.

9. The portable multifunctional current transformer calibration tester as claimed in claim 7 or 8, wherein: the power supply control module is characterized by further comprising a power supply control module, an electric quantity detection button (13), an electric quantity display (12), a Micro USB charging port (11) and a USB output port (10) are mounted on the side face of the machine body shell, a power supply control circuit board (14) is mounted inside the machine body shell, the electric quantity detection button (13), the electric quantity display (12), the Micro USB charging port (11) and the USB output port (10) are welded on the power supply control circuit board (14), and B + and B-of the power supply control circuit board (14) are connected with the positive electrode and the negative electrode of the battery (16).

10. The portable multifunctional current transformer calibration tester as recited in claim 9, wherein: the electric quantity display (12) is an electric quantity indicating lamp formed by a plurality of LED lamps.