CN210720709U - Secondary line checking device of current transformer - Google Patents
Secondary line checking device of current transformer Download PDFInfo
- Publication number
- CN210720709U CN210720709U CN201921066906.8U CN201921066906U CN210720709U CN 210720709 U CN210720709 U CN 210720709U CN 201921066906 U CN201921066906 U CN 201921066906U CN 210720709 U CN210720709 U CN 210720709U
- Authority
- CN
- China
- Prior art keywords
- power supply
- inverter circuit
- circuit board
- line
- supply assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a checking device for a secondary line of a current transformer, which comprises an inverter circuit board, wherein the inverter circuit board is respectively and electrically connected with a power supply assembly, an alligator clip and a meter bar; a switch is arranged between the inverter circuit board and the power supply assembly; a sounding reminder is arranged between the meter rod and the inverter circuit board. The sounding reminder is a buzzer. The sounding reminder is provided with a warning lamp, the power supply assembly is a rechargeable battery, and the rechargeable battery is led out of a charging port. The power supply assembly and the inverter circuit board are externally fixed with a power supply box, and the charging port is arranged on the outer surface of the power supply box. The utility model discloses a check device, the security is high, and it is more convenient to use, light easy operation, the utility model discloses when checking current transformer secondary line, need not untie the interior line of junction box and can develop the line work, save time and avoid wrong compound line. When the terminal row faces the dense terminal row and the illumination is strong, whether the line is grounded or not can be judged through sound, and the working efficiency is greatly improved.
Description
Technical Field
The utility model relates to a device is checked to current transformer secondary line belongs to transformer substation relay protection field technical field.
Background
With the continuous development of electric power construction industry, the debugging task of the transformer substation is increasingly heavy. The current transformer is used as one of key devices in a transformer substation, and is used for converting large primary side current into small secondary side current for protection, measurement and metering. Therefore, checking of the secondary line of the current transformer is an essential link in the debugging process of the transformer substation. Whether the secondary line is connected correctly or not is generally judged by a grounding method: firstly, checking that all secondary lines of a certain current transformer are ungrounded by a current terminal box, then, using a short-circuit wire to ground a certain secondary line by a debugging person on one side of the current transformer, checking that the secondary line to be checked is grounded by the debugging person on one side of the terminal box, and checking that the rest secondary lines are ungrounded, wherein the secondary line is correctly checked, and the rest lines are analogized accordingly. The existing direct current wire aligning lamp and the alternating current wire aligning lamp have two technical schemes. The direct current convection lamp consists of a direct current battery, a bulb and a lead; the AC line lamp consists of a 220V/5V transformer, a bulb and a conducting wire. The existing alignment line lamp has the following problems: (1) the direct current impedance of the secondary winding of the current transformer is very small, when a line is checked by a direct current convection lamp, a root line at one end of the winding of the current transformer needs to be untied, the line is connected again after checking, the time for wire disconnecting and wire compounding is long, and errors are easy to occur in the wire compounding process. And (2) the alternating current impedance of the secondary winding of the current transformer is very large, and the line inspection work can be completed without disconnecting the alternating current line lamp, but a 220V alternating current power supply needs to be connected. Finding available ac power on site takes time, and even if there is an ac socket in the terminal box, the 220V ac power carried by the ac twinax lamp exceeds the range of 36V, which is a safe voltage for human body. (3) The existing line lamp faces to the dense root line when the line is checked, and simultaneously, the light bulb is observed to judge whether the ground is connected or not, so that the attention is easy to be distracted, and particularly, the reaction speed is reduced under the condition of strong field illumination.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects that the direct current opposite line lamp needs to be disconnected and doubled in the prior art, and the detection efficiency is low; the alternating current diagonal lamp has potential safety hazard, and an external power supply is not easy to obtain at any time; whether ground connection, the low-efficient spirit of easily dividing is judged through the bright or dim of observing the bulb not enough, provides a current transformer secondary line check device, and technical scheme is as follows:
the current transformer secondary line checking device comprises an inverter circuit board, wherein the inverter circuit board is respectively and electrically connected with a power supply assembly, an alligator clip and a meter bar;
a switch is arranged between the inverter circuit board and the power supply assembly;
a sounding reminder is arranged between the meter rod and the inverter circuit board.
Further, the sounding reminder is a buzzer.
Preferably, the sounding reminder is provided with a warning lamp.
Furthermore, the power supply assembly is a rechargeable battery, and the rechargeable battery is led out of the charging port.
Preferably, a power supply box is fixed outside the power supply assembly and the inverter circuit board, and the charging port is arranged on the outer surface of the power supply box.
Preferably, the rechargeable battery is at least one of a lithium battery, a dry battery, a lead-acid battery, a solar panel and a hand generator.
Furthermore, the inverter circuit board is at least one of a half-bridge inverter circuit, a full-bridge inverter circuit and an inverter circuit with a center tap transformer.
Compared with the prior art, the utility model discloses the beneficial effect who reaches:
the safety is high, and the safe voltage of the human body does not exceed 36V. The traditional AC wire lamp uses 220V AC power supply; the utility model discloses use 12V lithium cell group.
The method is convenient and fast, when the traditional alternating current line lamp is used in a complex engineering site, a proper alternating current power supply needs to be searched, and sometimes even the power supply is accessed from a far place through a power supply disc; the utility model discloses only need press the switch just can start work. The main part of the traditional alternating current opposite-line lamp is a small transformer, and the transformer comprises an iron core lamp component which is slightly heavier; the utility model discloses the main part is lithium cell and inverter circuit board, and is lighter.
Compared with a direct current paired lamp: the utility model discloses when checking current transformer secondary line, need not untie the line in the terminal box and can carry out the line work, save plenty of time and avoid the possibility of wrong compound line. The light buzzer designed behind the watch stick enables a tester to judge whether the line is grounded or not only through sound without observing the light and the like in a distracted manner when the tester faces the dense terminal row and the light is strong, and greatly improves the working efficiency.
Drawings
FIG. 1 is a diagram of the secondary winding of a current transformer connected to a current terminal box;
fig. 2 is a schematic structural diagram of the present invention;
fig. 3 is a schematic diagram of the circuit connection of the present invention;
in the figure, 1-an inverter circuit board, 2-a power supply assembly, 21-a charging port, 3-a crocodile clip, 4-a meter bar, 5-a switch, 6-a sounding reminder and 7-a power supply box.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 3, the current transformer secondary line checking device comprises an inverter circuit board 1, wherein the inverter circuit board 1 is electrically connected with a power supply assembly 2, an alligator clip 3 and a meter bar 4 respectively;
a switch 5 is arranged between the inverter circuit board 1 and the power supply assembly 2; the switch 5 is only needed to be pressed to start working, and the trouble that the traditional alternating current line lamp needs to take time to search for a power supply is solved.
A sounding reminder 6 is arranged between the gauge stick 4 and the inverter circuit board 1. The sounding reminder 6 is a buzzer.
Preferably, the sounding reminder 6 is provided with a warning light. The sounding reminder 6 is preferably a light buzzer.
Further, the power supply module 2 is a rechargeable battery, and the rechargeable battery is led out of the charging port 21.
In a preferred embodiment, the power supply unit 2 and the inverter circuit board 1 are externally fixed with the power supply case 7, and the charging port 21 is disposed on the outer surface of the power supply case 7. The power supply assembly 2 adopts a 12V rechargeable lithium battery pack, the voltage does not exceed the human body safety voltage by 36V, and the safety is higher. The main part of the traditional alternating current opposite-line lamp is a small transformer, and the transformer comprises an iron core lamp component which is slightly heavier; the utility model discloses the main part is lithium cell and inverter circuit board 1, and weight is lighter.
Specifically, the inverter circuit board 1 is a full-bridge inverter circuit, and can convert a 12V dc into a 12V ac.
The alternating current power supply module is composed of a direct current lithium battery pack and an inverter circuit board 1. The back of the watch stick 4 is connected with a light buzzer in series to form a loop.
As shown in fig. 1, the secondary windings of the current transformer are connected to the current terminal box through wires according to the drawing, and 1S1 and 1S2 are two ends of the first secondary winding, and the impedance Z therebetween is R + j2 pi fL. For direct current, the impedance is R, the value is small, 1S1 and 1S2 are equivalent to short circuit, so when checking the pair lines by a direct current method, a tester on the terminal box side grounds 1S1, the tester on the terminal box side checks two grounded lines, and the secondary line needs to be untied from 1S1 or 1S2 to check; for alternating current, the impedance is 2 pi fL, the value is large, 1S1 and 1S2 are equivalent to open circuits, a junction box side tester grounds 1S1, a terminal box side tester only checks one grounded line, and the advantage of checking the secondary line of the current transformer by an alternating current method is also provided.
Referring to fig. 2, an alternating current power supply module formed by a direct current lithium battery pack and an inverter circuit board 1 forms a loop with a light buzzer, a lead, a watch stick 4 and an alligator clip 3. The power supply assembly 2 and the inverter circuit board 1 are fixed in the power supply box 7, and the charging port 21 and the power switch 5 are fixed on the power supply box 7. The positive pole of the power supply assembly 2 and the positive pole of the inverter circuit board 1 are connected in series with the conducting wire through the power switch 5, and the negative pole of the power supply assembly 2 and the negative pole of the inverter circuit board 1 are directly connected through the conducting wire. The alternating current output of the inverter circuit board 1 is provided with two terminals, one end of the two terminals is connected with the lead and the crocodile clip 3, and the other end of the two terminals is connected with the lead, the light buzzer and the watch stick 4. The light buzzer, the watch stick 4 and the crocodile clip 3 extend out of the power supply box 7 through the conducting wires.
Fig. 3 is a schematic diagram of the present invention. The controllable diode (T1-T4) forms an inverter circuit, outputs a direct current power supply as an alternating current power supply, a loop is formed by the indicator lamp, the buzzer, the secondary wire of the current transformer and the grounding wire, and a tester judges whether the checked wire is correct or not according to the working states of the indicator lamp and the buzzer.
The device of the utility model has the following checking process:
as shown in fig. 1-3, the utility model discloses when checking the current transformer secondary line, the tester A who holds the device is checked to the current transformer secondary line is in terminal box one side, and tester B is in current transformer terminal box one side.
The tester a shifts the power switch 5 of the alignment lamp to the on position, i.e., turns on the check circuit, and clamps the alligator clip 3 on the grounding bar. Firstly, the watch bar 4 is contacted with the grounding bar, and the light buzzer alarms (flickers and buzzes), so that the function of the checking device is proved to be normal and intact. The 1D1 to 1D8 terminal blocks are then contacted in sequence by the gauge 4 and the light buzzer should not alarm (the light buzzer alarm indicates that the line is grounded and vice versa indicates no ground). If the grounding exists, the tester should check and remove the grounding and then continue.
The tester B connects the 1S1 wiring terminal in the current transformer wiring box with the grounding body by using the grounding wire, the tester A sequentially contacts the 1D 1-1D 8 terminal row by using the meter rod 4, the light buzzer should alarm when the meter rod 4 contacts the 1D1, and the light buzzer should not alarm when the meter rod contacts the 1D2-1D 8.
The tester B moves the grounding wire to the 1S2 wiring terminal, the tester A sequentially contacts the 1D1 to 1D8 terminal row by using the meter rod 4, the light buzzer alarms when the meter rod 4 contacts the 1D2, and the light buzzer does not alarm when the meter rod 4 contacts the 1D1 and the 1D3-1D 8.
And sequentially checking the grounding conditions of the other secondary lines until all the secondary lines are checked.
The utility model discloses when not only can be used for current transformer to look into root line, still can be used to carry out the line work of other any forms.
The utility model discloses compare with the direct current to the line lamp when checking current transformer secondary line, need not untie the line in the terminal box and can carry out the line to work, save plenty of time and avoid the possibility of wrong compound line. The light buzzer designed behind the watch stick enables a tester to judge whether the line is grounded or not only through sound without observing the light and the like in a distracted manner when the tester faces the dense terminal row and the light is strong, and greatly improves the working efficiency.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (7)
1. The checking device for the secondary line of the current transformer is characterized by comprising an inverter circuit board, wherein the inverter circuit board is respectively and electrically connected with a power supply assembly, an alligator clip and a meter bar;
a switch is arranged between the inverter circuit board and the power supply assembly;
and a sounding reminder is arranged between the meter rod and the inverter circuit board.
2. The verification device of claim 1, wherein the audible reminder is a buzzer.
3. The verification device of claim 2, wherein the audible reminder has a warning light thereon.
4. The verification device of claim 1, wherein the power supply component is a rechargeable battery that exits the charging port.
5. The verification device according to claim 4, wherein a power supply box is fixed outside the power supply assembly and the inverter circuit board, and the charging port is disposed on an outer surface of the power supply box.
6. A verification device according to claim 4, wherein the rechargeable battery is at least one of a lithium battery, a dry battery, a lead-acid battery, a solar panel, a hand generator.
7. The verification apparatus of claim 1, wherein the inverter circuit board is at least one of a half-bridge inverter circuit, a full-bridge inverter circuit, and an inverter circuit with a center-tapped transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921066906.8U CN210720709U (en) | 2019-07-09 | 2019-07-09 | Secondary line checking device of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921066906.8U CN210720709U (en) | 2019-07-09 | 2019-07-09 | Secondary line checking device of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210720709U true CN210720709U (en) | 2020-06-09 |
Family
ID=70932940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921066906.8U Active CN210720709U (en) | 2019-07-09 | 2019-07-09 | Secondary line checking device of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210720709U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707970A (en) * | 2020-06-28 | 2020-09-25 | 国网山东省电力公司威海供电公司 | Secondary phase checking device of combined mutual inductor |
-
2019
- 2019-07-09 CN CN201921066906.8U patent/CN210720709U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707970A (en) * | 2020-06-28 | 2020-09-25 | 国网山东省电力公司威海供电公司 | Secondary phase checking device of combined mutual inductor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101304397B1 (en) | Lithium iron battery-based direct current power supply emergency response system for transformer substation | |
| CN103454554B (en) | Polarity tester for current transformer | |
| CN203502540U (en) | Current transformer polarity tester | |
| CN110346682B (en) | Output connection state detection circuit and method for DCDC converter of electric vehicle | |
| CN201594133U (en) | Novel testing equipment for lithium ion battery protecting plates | |
| CN210720709U (en) | Secondary line checking device of current transformer | |
| CN104655973B (en) | A kind of method and apparatus that battery module short circuit is detected in ups system | |
| CN204832408U (en) | Portable current transformer secondary circuit tester of working a telephone switchboard | |
| CN202815146U (en) | Polarity detector for mutual inductor | |
| CN206306843U (en) | Electric automobile and its leakage protection circuit | |
| CN206797152U (en) | emergency starting system and electric automobile emergency starting device | |
| CN108832210A (en) | The passive continuous charged renewal device of battery | |
| CN213138539U (en) | Charging data acquisition and analysis module | |
| CN212083530U (en) | Improved high-voltage electroscope | |
| CN201270275Y (en) | Bridging device suitable for replacing lagging accumulator | |
| CN204228882U (en) | A kind of winding polarity test checking apparatus of electric power mutual-inductor | |
| CN220040732U (en) | Portable electroscope verifying attachment of two voltage grades | |
| CN207007881U (en) | A kind of plug-in technique module performance detects fixture | |
| CN113219392A (en) | Portable chargeable formula remote control current transformer polarity tester | |
| CN211374932U (en) | Low-voltage direct-current system grounding patrol device | |
| CN206649150U (en) | The verifying attachment that current transformer polarity coordinates in differential protection for generator | |
| CN205692928U (en) | The online more changing device of accumulator | |
| CN218733383U (en) | Mobile charging device | |
| CN2569158Y (en) | Micro short-circuit detector | |
| CN211148834U (en) | Inverter insulation monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |