CN204008955U - CT polarity measurement device - Google Patents
CT polarity measurement device Download PDFInfo
- Publication number
- CN204008955U CN204008955U CN201420386125.8U CN201420386125U CN204008955U CN 204008955 U CN204008955 U CN 204008955U CN 201420386125 U CN201420386125 U CN 201420386125U CN 204008955 U CN204008955 U CN 204008955U
- Authority
- CN
- China
- Prior art keywords
- terminal
- housing
- described housing
- measurement device
- coil
- 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.)
- Expired - Fee Related
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000007769 metal material Substances 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
CT polarity measurement device of the present utility model comprises housing, the lower left in described housing front is provided with shift knob, the positive middle part of described housing is embedded with transparent plate, the left side of described housing is provided with A terminal and a terminal, described housing right side is provided with B terminal and b terminal, in the housing at described transparent plate place, by rotating shaft, be fixed with metal finger, left side in described housing is provided with battery, the positive pole of described battery connects A terminal by shift knob, the negative pole of described battery connects a terminal, right side in described housing is provided with iron core, described iron core is wound with coil outward, the two ends of described coil connect respectively B terminal and b terminal.This apparatus structure is simple, and volume is little, carries with easy to use, in primary circuit, add after the magnitude of current, observe the swaying direction of metal finger, can realize fast the judgement of CT polarity, guarantee equipment and personnel's safety, avoided the problem of relocating, greatly improved work efficiency.
Description
Technical field
The utility model relates to a kind of monitoring equipment, specifically CT polarity measurement device.
Background technology
Due to electric system secondary connection more complicated, relate to the protection loop of CT, are all very important loops, if CT reverse polarity connection is easy to cause protection malfunction or tripping, cause a serious accident.For fear of CT reverse polarity connection, important route protection, tranformer protection, bus differential protection etc. all will carry out on-load and survey direction, but the problem of CT reverse polarity connection still occurs in reality.If in the uncharged situation of equipment, can correct measurement CT polarity, can avoid finding that CT polarity is to changing the problem of wiring again, smooth, the safe power transmission of assurance equipment after equipment power transmission.
Utility model content
In order to address the above problem, the utility model provides a kind of CT polarity measurement device, solves the problem of CT secondary circuit wiring, can the in the situation that of on-load not, test CT polarity, guarantees that wiring is correct.
The utility model is by the following technical solutions: CT polarity measurement device, it is characterized in that, comprise housing, the lower left in described housing front is provided with shift knob, the positive middle part of described housing is embedded with transparent plate, the left side of described housing is provided with A terminal and a terminal, described housing right side is provided with B terminal and b terminal, in the housing at described transparent plate place, by rotating shaft, be fixed with metal finger, left side in described housing is provided with battery, the positive pole of described battery connects A terminal by shift knob, the negative pole of described battery connects a terminal, right side in described housing is provided with iron core, described iron core is wound with coil outward, the two ends of described coil connect respectively B terminal and b terminal.
Further, described battery is button cell or No.5 cell.
Further, described metal finger is made by magnetic metal material.
Further, between described coil and b terminal, be provided with a diode, described diode cathode connecting coil, the negative pole of described diode connects b terminal.
The beneficial effects of the utility model are: this apparatus structure is simple, volume is little, carry with easy to use, in primary circuit, add after the magnitude of current, observe the swaying direction of metal finger, can realize fast the judgement of CT polarity, guaranteed equipment and personnel's safety, avoid the problem of relocating, greatly improved work efficiency.
Accompanying drawing explanation
Fig. 1 is external structure front view of the present utility model;
Fig. 2 is the circuit theory schematic diagram of a kind of embodiment of the utility model;
Fig. 3 is the circuit theory schematic diagram of the another kind of embodiment of the utility model.
In Fig. 1: 1 housing, 2 transparent plates, 3 metal fingers, 4 shift knobs, 5 A terminals, 6 a terminals, 7 B terminals, 8 b terminals.
Embodiment
CT polarity measurement device as depicted in figs. 1 and 2, comprise housing 1, the lower left in described housing 1 front is provided with shift knob 4, the positive middle part of described housing 1 is embedded with transparent plate 2, the left side of described housing 1 is provided with A terminal 5 and a terminal 6, described housing right side is provided with B terminal 7 and b terminal 8, in the housing at described transparent plate 2 places, by rotating shaft, be fixed with metal finger 3, left side in described housing is provided with battery, the positive pole of described battery connects A terminal by shift knob, the negative pole of described battery connects a terminal, right side in described housing is provided with iron core, described iron core is wound with coil outward, the two ends of described coil connect respectively B terminal and b terminal wherein, described battery is button cell or No.5 cell, can effectively reduce device volume, described metal finger is by iron, cobalt, the magnetic such as nickel and alloy thereof metal material is made.
Under a kind of embodiment, during use, as shown in Figure 2, A terminal and a connecting terminals are received on primary circuit, B terminal and b connecting terminals are received on secondary circuit, press shift knob, battery is powered to primary circuit, during beginning, in the middle of metal finger is positioned at, if secondary circuit wiring is correct, B terminal is anodal, produces forward current, iron core band magnetic in coil, attract metal finger deflection to the right, if secondary circuit wiring error (being reversal connection), b terminal is anodal, produces inverse current in coil, iron core band magnetic, the metal finger power deflection left that is excluded.
Under another kind of embodiment, as shown in Figure 3, between described coil and b terminal, be provided with a diode, described diode cathode connecting coil, the negative pole of described diode connects b terminal, during use, A terminal and a connecting terminals are received on primary circuit, B terminal and b connecting terminals are received on secondary circuit, press shift knob, battery is powered to primary circuit, during beginning, in the middle of metal finger is positioned at, if secondary circuit wiring is correct, B terminal is anodal, diode conducting, generation current in coil, iron core band magnetic, attract metal finger deflection to the right, if secondary circuit wiring error (being reversal connection), b terminal is anodal, diode cut-off, generation current not in coil, not deflection of metal finger.
Except structure described in the utility model, all the other are prior art.
The above is preferred implementation of the present utility model; for those skilled in the art; not departing under the prerequisite of the utility model principle, can also make some improvements and modifications, these improvements and modifications are also regarded as protection domain of the present utility model.
Claims (4)
1.CT polarity measurement device, it is characterized in that, comprise housing, the lower left in described housing front is provided with shift knob, the positive middle part of described housing is embedded with transparent plate, the left side of described housing is provided with A terminal and a terminal, described housing right side is provided with B terminal and b terminal, in the housing at described transparent plate place, by rotating shaft, be fixed with metal finger, left side in described housing is provided with battery, the positive pole of described battery connects A terminal by shift knob, the negative pole of described battery connects a terminal, right side in described housing is provided with iron core, described iron core is wound with coil outward, the two ends of described coil connect respectively B terminal and b terminal.
2. CT polarity measurement device according to claim 1, is characterized in that, described battery is button cell or No.5 cell.
3. CT polarity measurement device according to claim 1, is characterized in that, described metal finger is made by magnetic metal material.
4. according to the CT polarity measurement device described in claim 1-3 any one, it is characterized in that, between described coil and b terminal, be provided with a diode, described diode cathode connecting coil, the negative pole of described diode connects b terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420386125.8U CN204008955U (en) | 2014-07-11 | 2014-07-11 | CT polarity measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420386125.8U CN204008955U (en) | 2014-07-11 | 2014-07-11 | CT polarity measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204008955U true CN204008955U (en) | 2014-12-10 |
Family
ID=52048933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420386125.8U Expired - Fee Related CN204008955U (en) | 2014-07-11 | 2014-07-11 | CT polarity measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204008955U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098684A (en) * | 2020-09-16 | 2020-12-18 | 国网山东省电力公司招远市供电公司 | Quick checking instrument for reverse connection of inlet and outlet wires of electric energy meter |
-
2014
- 2014-07-11 CN CN201420386125.8U patent/CN204008955U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098684A (en) * | 2020-09-16 | 2020-12-18 | 国网山东省电力公司招远市供电公司 | Quick checking instrument for reverse connection of inlet and outlet wires of electric energy meter |
| CN112098684B (en) * | 2020-09-16 | 2023-07-28 | 国网山东省电力公司招远市供电公司 | Electric energy meter wire inlet and outlet reverse connection rapid checking instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20200711 |