CN204462243U - Master iron core ground current on-Line Monitor Device - Google Patents
Master iron core ground current on-Line Monitor Device Download PDFInfo
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- CN204462243U CN204462243U CN201520122695.0U CN201520122695U CN204462243U CN 204462243 U CN204462243 U CN 204462243U CN 201520122695 U CN201520122695 U CN 201520122695U CN 204462243 U CN204462243 U CN 204462243U
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- limiting resistance
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 230000013011 mating Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
Master iron core ground current on-Line Monitor Device, comprise current sensor, slave computer, host computer and be connected on the current-limiting resistance unit in ground path, slave computer is connected with current sensor and host computer respectively, host computer is connected with current-limiting resistance unit, current sensor both sides arrange a supporting plate respectively, and supporting plate top surface offers stopper slot.The utility model has the advantage of: current sensor is contained on iron core grounding line by it, accurately gather ground current, by slave computer by digital data transmission to host computer, again by host computer to digital signal processing, analysis and calculation, realize iron core grounding current Real-Time Monitoring, online evaluation is carried out to transformer state, thus reaches the object prevented trouble before it happens.When leakage current exceedes limit value, send alerting signal, drop into the resistance in current-limiting resistance unit according to the Analyzing on Size of leakage current, within transformer leakage electric current is reduced to setting, guarantee transformer can not when two points ground fault long-play.
Description
Technical field
The utility model relates to a kind of monitoring device, specifically master iron core ground current on-Line Monitor Device.
Background technology
When transformer normally runs, iron core must have some reliable grounds.But when 2 and above ground connection appear in iron core, the uneven current potential between iron core will form circulation between earth point, and causes multipoint earthing of iron core heating accident.The iron core grounding fault of transformer can cause iron core local overheating, and time serious, iron core local temperature rise increases, light gas action, even can cause grave gas action and the accident that trips.The local iron core of scorification forms the short trouble between lamination, makes iron loss become large, has a strong impact on the performance of transformer and normal work, so that must change iron core silicon-steel sheet repaired.
At present, the detection means that field staff is usual is wire current under the ground connection of employing clamp on amperemeter survey iron core grounded by outer lead sleeve pipe, this method is subject to strong electromagnetic environmental interference, there will be the same measurement point situation that measured value difference is totally different several times, and can not ensure to find iron core two points ground fault in the very first time, accuracy of detection and ageingly all there is certain problem, thus can not make the health status of transformer and judging comprehensively, accurately.
Utility model content
For solving the problem, the purpose of this utility model is to provide a kind of master iron core ground current on-Line Monitor Device.
The utility model for achieving the above object, be achieved through the following technical solutions: master iron core ground current on-Line Monitor Device, comprise current sensor, slave computer, host computer and be connected on the current-limiting resistance unit in ground path, slave computer is connected with current sensor and host computer respectively, host computer is connected with current-limiting resistance unit, current sensor both sides arrange a supporting plate respectively, and supporting plate top surface offers stopper slot.
For realizing the purpose of this utility model further, can also by the following technical solutions: described current sensor arranges connecting link, connecting link two ends fixedly mount a fixed block respectively, fixed block is offered vertical slideway, supporting plate side arranges vertical slide rail, and several mounting hole vertically offered by slide rail, fixed block vertically offers several mating holes, slide rail cooperation is arranged in the slideway on fixed block, and mating holes overlaps with mounting hole center line, arranges fixed pin in hole; Described current sensor is offered laterally penetrating connecting hole, be positioned at connecting hole in the middle part of connecting link, connecting link arranges external thread, connecting link coordinates installation two setting nuts, two setting nuts touch with current sensor both sides outer wall respectively.
The utility model has the advantage of: in the utility model, current sensor is contained on iron core grounding line, accurately gather ground current, by slave computer by digital data transmission to host computer, again by host computer to digital signal processing, analysis and calculation, realize iron core grounding current Real-Time Monitoring, earth fault is automatically recorded ripple, is analyzed the functions such as judgement, fault alarm, trend prediction.Online evaluation, early warning and venture analysis are carried out to transformer state, thus reaches the object prevented trouble before it happens.When leakage current exceedes limit value, send alerting signal, drop into the resistance in current-limiting resistance unit according to the Analyzing on Size of leakage current, within transformer leakage electric current is reduced to setting, guarantee transformer can not when two points ground fault long-play.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation; Fig. 2 is electromagnetic sensor structural representation in the utility model; Fig. 3 is the right view of Fig. 2; Fig. 4 is current-limiting resistance cellular construction schematic diagram in the utility model.
Reference numeral: 1 current sensor 2 slave computer 3 host computer 4 current-limiting resistance unit 5 connecting hole 6 connecting link 7 setting nut 8 supporting plate 9 stopper slot 10 fixed block 11 slide rail 12 mounting hole 13 mating holes 14 fixed pin 15 comprehensive protector.
Embodiment
Master iron core ground current on-Line Monitor Device, as shown in Figure 1, the current-limiting resistance unit 4 comprising current sensor 1, slave computer 2, host computer 3 and be connected in ground path, slave computer 2 is connected with current sensor 1 and host computer 3 respectively, host computer 3 is connected with current-limiting resistance unit 4, current sensor 1 both sides arrange a supporting plate 8 respectively, and supporting plate 8 end face offers stopper slot 9.Current sensor 1 is contained on iron core grounding line by this structure, accurately gather ground current, by slave computer 2 by digital data transmission to host computer 3, again by host computer 3 pairs of digital signal processing, analysis and calculations, realize iron core grounding current Real-Time Monitoring, earth fault is automatically recorded ripple, is analyzed the functions such as judgement, fault alarm, trend prediction.Online evaluation, early warning and venture analysis are carried out to transformer state, thus reaches the object prevented trouble before it happens.When leakage current exceedes limit value, send alerting signal, drop into the resistance in current-limiting resistance unit 4 according to the Analyzing on Size of leakage current, within transformer leakage electric current is reduced to setting, guarantee transformer can not when two points ground fault long-play.Because needs are monitored iron core grounding current for a long time, therefore, iron core grounding line need remain in the measurement range of current sensor 1, iron core grounding line is arranged on the stopper slot 9 on two supporting plates 8, this structure can play support and the effect of secured core ground wire, avoids iron core grounding line to rock the measurement result of the current sensor 1 of generation inaccurate.
For convenience of the position regulating iron core grounding line relative to current sensor 1 in the vertical direction, make measurement result more accurate, described current sensor 1 arranges connecting link 6, connecting link 6 two ends fixedly mount a fixed block 10 respectively, fixed block 10 offers vertical slideway, supporting plate 8 side arranges vertical slide rail 11, several mounting hole 12 vertically offered by slide rail 11, fixed block 10 vertically offers several mating holes 13, slide rail 11 cooperation is arranged in the slideway on fixed block 10, mating holes 13 overlaps with mounting hole 12 center line, fixed pin 14 is set in hole.This structure can make supporting plate 8 control the position of vertical direction by the slip of slide rail 11 on fixed block 10, and is fixed by the position of fixed pin 14 pairs of supporting plates 8, thus the convenient iron core grounding line that regulates is relative to the position of current sensor 1 in the vertical direction.
For convenience of regulating iron core grounding line relative to current sensor 1 position in the horizontal direction, make measurement result more accurate, described current sensor 1 is offered laterally penetrating connecting hole 5, connecting hole 5 is positioned in the middle part of connecting link 6, connecting link 6 arranges external thread, connecting link 6 coordinate installation two setting nuts 7, two setting nuts 7 touch with current sensor 1 both sides outer wall respectively.This structure can make connecting link 6 transverse shifting in connecting hole 5, and by two setting nut 7 fixed positions, thus the convenient iron core grounding line that regulates is relative to current sensor 1 position in the horizontal direction.
Described current-limiting resistance unit 4 structure as shown in Figure 4.Current-limiting resistance unit 4 is made up of four resistance branch altogether.Wherein R1, R2, R3 and R4 are resistance, and J1, J2, J3 are solid-state relay, and solid-state relay is the contactless electronic beam switch with isolation features, mechanical contact component in switching process, have logical circuit compatibility, resistance to mechanical resistant of shaking is impacted, the unconfined advantage in installation site.Because current-limiting resistance is serially connected among iron core grounding loop, therefore the loop device for this reason that occurs opening a way to be avoided as far as possible to take certain measure in design: first each branch road have selected powerful resistance, multichannel resistance parallel way is adopted to reduce the probability of open circuit, secondly resistance R4 is extremely connected in loop, this branch road is not connected in series relay, this avoid the possibility that relay causes all resistance branch to be opened a way because of malfunction, comprehensive protector 15 also in parallel on the resistance of device in addition, comprehensive protector 15 is made up of voltage dependent resistor (VDR) and discharge tube, serve the effect of pressure limiting.Can find out from the structure of this current-limiting circuit just can the current-limiting resistance value of control loop by the folding condition of pilot relay.When core current is normal, K, J1, J2, J3 are in closure state, if electric current exceeds standard, are then opened by K and carry out the operation to J1, J2, J3, with the current-limiting resistance of increasing input according to the instruction of host computer 3.Then need to exit current-limiting resistance after the multipoint earth faults of instability disappears, be all in closure state by K, J1, J2, J3.
The technical solution of the utility model is not restricted in the scope of embodiment described in the utility model.The technology contents of the not detailed description of the utility model is known technology.
Claims (3)
1. master iron core ground current on-Line Monitor Device, it is characterized in that: the current-limiting resistance unit (4) comprising current sensor (1), slave computer (2), host computer (3) and be connected in ground path, slave computer (2) is connected with current sensor (1) and host computer (3) respectively, host computer (3) is connected with current-limiting resistance unit (4), current sensor (1) both sides arrange a supporting plate (8) respectively, and supporting plate (8) end face offers stopper slot (9).
2. master iron core ground current on-Line Monitor Device according to claim 1, it is characterized in that: described current sensor (1) arranges connecting link (6), connecting link (6) two ends fixedly mount a fixed block (10) respectively, (10) offer vertical slideway to fixed block, supporting plate (8) side arranges vertical slide rail (11), several mounting hole (12) vertically offered by slide rail (11), fixed block (10) vertically offers several mating holes (13), slide rail (11) cooperation is arranged in the slideway on fixed block (10), mating holes (13) overlaps with mounting hole (12) center line, fixed pin (14) is set in hole.
3. master iron core ground current on-Line Monitor Device according to claim 2, it is characterized in that: described current sensor (1) is offered laterally penetrating connecting hole (5), connecting link (6) middle part is positioned at connecting hole (5), (6) arrange external thread to connecting link, connecting link (6) is upper coordinates installation two setting nuts (7), and two setting nuts (7) touch with current sensor (1) both sides outer wall respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122695.0U CN204462243U (en) | 2015-03-03 | 2015-03-03 | Master iron core ground current on-Line Monitor Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122695.0U CN204462243U (en) | 2015-03-03 | 2015-03-03 | Master iron core ground current on-Line Monitor Device |
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| Publication Number | Publication Date |
|---|---|
| CN204462243U true CN204462243U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520122695.0U Expired - Fee Related CN204462243U (en) | 2015-03-03 | 2015-03-03 | Master iron core ground current on-Line Monitor Device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067871A (en) * | 2015-07-16 | 2015-11-18 | 国家电网公司 | Online monitoring device for grounding current of main transformer core |
| CN108318732A (en) * | 2018-03-13 | 2018-07-24 | 国家电网公司 | A kind of transformer iron core grounding current on-Line Monitor Device and method |
| CN108919035A (en) * | 2018-08-23 | 2018-11-30 | 杜都 | A kind of transformer voltage regulation function energization and earth detector |
-
2015
- 2015-03-03 CN CN201520122695.0U patent/CN204462243U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067871A (en) * | 2015-07-16 | 2015-11-18 | 国家电网公司 | Online monitoring device for grounding current of main transformer core |
| CN108318732A (en) * | 2018-03-13 | 2018-07-24 | 国家电网公司 | A kind of transformer iron core grounding current on-Line Monitor Device and method |
| CN108318732B (en) * | 2018-03-13 | 2024-01-23 | 国家电网公司 | On-line monitoring device and method for grounding current of transformer core |
| CN108919035A (en) * | 2018-08-23 | 2018-11-30 | 杜都 | A kind of transformer voltage regulation function energization and earth detector |
| CN108919035B (en) * | 2018-08-23 | 2021-06-01 | 重庆深长蓝嘉电力工程有限公司 | Voltage regulation function power-on and leakage detection device for transformer |
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| Date | Code | Title | Description |
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| 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: 20150708 Termination date: 20180303 |