CN204964738U - Current transformer secondary circuit precaution device of opening a way - Google Patents
Current transformer secondary circuit precaution device of opening a way Download PDFInfo
- Publication number
- CN204964738U CN204964738U CN201520735768.3U CN201520735768U CN204964738U CN 204964738 U CN204964738 U CN 204964738U CN 201520735768 U CN201520735768 U CN 201520735768U CN 204964738 U CN204964738 U CN 204964738U
- Authority
- CN
- China
- Prior art keywords
- current transformer
- current
- triode
- relay
- precaution device
- 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
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000004821 Contact adhesive Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model discloses a current transformer secondary circuit precaution device of opening a way, including the casing, be provided with current relay and buzzer in the casing, current relay's coil both ends are connected at current transformer secondary side output, and current relay's normally closed contact and buzzer concatenate in the power return circuit. The utility model discloses install the secondary side at current transformer for when current transformer secondary circuit took place to open a way the trouble, fast, accurately report to the police, the operation personnel of being convenient for discover in time that current transformer is unusual, so that in time carry out fault handling.
Description
Technical field
The utility model relates to power system power supply technical field, particularly a kind of warning device for current transformer.
Background technology
Current transformer is applied in electric system; for the big current of primary circuit to be transformed into the small area analysis of secondary side by transformer ratio; so that coordinate the measurement carrying out electric current, electric energy with instrument; or to coordinate with relay and carry out system overload and short-circuit protection; instrument and meter and circuit high-voltage isolating can also be made, proterctive equipment security of operation and operator safety.Current transformer is when normally working, and secondary side is near short circuit state, and output voltage is very low; As secondary side is opened a way, then secondary side can produce the superpotential of thousands of volt, not only can work the mischief to the electrical secondary system of electric system, current transformer also can be made too drastic and burn, even go back entail dangers to operating personnel safety, therefore forbid Current Transformer Secondary to be opened a way in Operation of Electric Systems process.
But, in real work, often due to the carelessness of operating personnel or connection terminal is loosening, aging etc. that reason causes Current Transformer Secondary side to be opened a way.When open circuit occurs the secondary side of current transformer, owing to there is no obvious outward appearance phenomenon, be therefore generally not easy to be found.At present; for Current Transformer Secondary open circuit problem; the way of usual employing is that manual site measures or protection device for installing; but there is inefficiency, problem that security risk is large in manual site's measuring method; and protection device for installing can only solve the direct harm of opening a way and causing; cannot intuitively remind, therefore fault is difficult to be processed in time.
Utility model content
The utility model technical issues that need to address be to provide a kind of can fast, accurately, intuitively to the device that open circuit of secondary loop of current transformer state is reported to the police.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
Open circuit of secondary loop of current transformer precaution device, comprise housing, be provided with current relay and hummer in housing, the coil two ends of described current relay are connected to Current Transformer Secondary side output terminal, and normally closed contact and the hummer of current relay are serially connected in electric power loop.
Above-mentioned open circuit of secondary loop of current transformer precaution device, also PCB is provided with in described housing, PCB is welded with single-chip microcomputer, wireless sending module and triode, the base stage of described triode is connected between relay normally closed contact and hummer, the collector of triode connects power end, the grounded emitter of triode; The collector of described triode also connects the input end of single-chip microcomputer, and the output terminal of single-chip microcomputer connects wireless sending module.
Above-mentioned open circuit of secondary loop of current transformer precaution device, is serially connected with current-limiting resistance between the emitter of described triode and ground.
Owing to have employed above technical scheme, acquired by the utility model, technical progress is as follows.
The utility model is arranged on Current Transformer Secondary side, for when secondary loop of mutual inductor generation open fault, reports to the police quickly and accurately, is convenient to operating personnel's Timeliness coverage current transformer abnormal, to carry out fault handling in time.
Accompanying drawing explanation
Fig. 1 is electrical schematic diagram of the present utility model.
Wherein: JL. current relay, HA. hummer, R. current-limiting resistance, Q. triode, U1. single-chip microcomputer, U2. wireless sending module.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
A kind of open circuit of secondary loop of current transformer precaution device, comprise housing, be provided with current relay JL, hummer HA and PCB in housing, current relay JL and hummer HA forms on-the-spot sound alarm circuit; Each element in current relay JL and PCB forms remote alarms circuit, and in the utility model, the annexation of each element as shown in Figure 1.
The concrete annexation of on-the-spot sound alarm circuit is: current relay coil two ends are connected to Current Transformer Secondary side output terminal, and normally closed contact and the hummer of current relay are serially connected in electric power loop.
Remote alarms circuit comprises current relay and is welded on single-chip microcomputer U1, wireless sending module U2, triode Q and the current-limiting resistance R in PCB.Wherein, the base stage of triode is connected between relay normally closed contact and hummer, and the collector of triode connects power end, the grounded emitter of triode; The collector of triode also connects the input end of single-chip microcomputer, and the output terminal of single-chip microcomputer connects wireless sending module; Current-limiting resistance R is serially connected between the emitter of triode and ground.
When the utility model uses, housing is arranged on current transformer, and current relay coil two ends are connected to Current Transformer Secondary side output terminal.When secondary loop of mutual inductor generation open fault, current relay coil dead electricity, normally closed contact adhesive, hummer starts warning immediately; Triode triggering and conducting simultaneously, preset warning message is sent to the mobile terminal bound with it by Single-chip Controlling wireless sending module, reminds operating personnel to process in time.When thus after being often disposed, just can to restore to the original state state normal operation input without the need to hand-reset.
Claims (3)
1. open circuit of secondary loop of current transformer precaution device, it is characterized in that: comprise housing, current relay (JL) and hummer (HA) is provided with in housing, described current relay coil two ends are connected to Current Transformer Secondary side output terminal, and normally closed contact and the hummer of current relay are serially connected in electric power loop.
2. open circuit of secondary loop of current transformer precaution device according to claim 1, it is characterized in that: in described housing, be also provided with PCB, PCB is welded with single-chip microcomputer (U1), wireless sending module (U2) and triode (Q), the base stage of described triode is connected between relay normally closed contact and hummer, the collector of triode connects power end, the grounded emitter of triode; The collector of described triode also connects the input end of single-chip microcomputer, and the output terminal of single-chip microcomputer connects wireless sending module.
3. open circuit of secondary loop of current transformer precaution device according to claim 2, is characterized in that: be serially connected with current-limiting resistance (R) between the emitter of described triode and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520735768.3U CN204964738U (en) | 2015-09-22 | 2015-09-22 | Current transformer secondary circuit precaution device of opening a way |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520735768.3U CN204964738U (en) | 2015-09-22 | 2015-09-22 | Current transformer secondary circuit precaution device of opening a way |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204964738U true CN204964738U (en) | 2016-01-13 |
Family
ID=55059794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520735768.3U Expired - Fee Related CN204964738U (en) | 2015-09-22 | 2015-09-22 | Current transformer secondary circuit precaution device of opening a way |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204964738U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785220A (en) * | 2016-05-16 | 2016-07-20 | 国网山东省电力公司滨州供电公司 | Open-circuit prompting circuit and device for power system secondary loop regular checking assistance |
| CN107315157A (en) * | 2017-08-04 | 2017-11-03 | 国网江苏省电力公司无锡供电公司 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
| CN113588993A (en) * | 2021-06-10 | 2021-11-02 | 华能嘉祥发电有限公司 | Device and method for replacing ammeter on line |
| WO2023087428A1 (en) * | 2021-11-19 | 2023-05-25 | 广东福德电子有限公司 | New secondary wire break protection apparatus for current transformer |
-
2015
- 2015-09-22 CN CN201520735768.3U patent/CN204964738U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785220A (en) * | 2016-05-16 | 2016-07-20 | 国网山东省电力公司滨州供电公司 | Open-circuit prompting circuit and device for power system secondary loop regular checking assistance |
| CN105785220B (en) * | 2016-05-16 | 2018-05-08 | 国网山东省电力公司滨州供电公司 | A kind of secondary loop in power system regular inspection auxiliary open circuit alert circuit and device |
| CN107315157A (en) * | 2017-08-04 | 2017-11-03 | 国网江苏省电力公司无锡供电公司 | A kind of current transformer circuit supervision fail alarm detector and current transformer device |
| CN113588993A (en) * | 2021-06-10 | 2021-11-02 | 华能嘉祥发电有限公司 | Device and method for replacing ammeter on line |
| WO2023087428A1 (en) * | 2021-11-19 | 2023-05-25 | 广东福德电子有限公司 | New secondary wire break protection apparatus for current transformer |
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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: 20160113 Termination date: 20160922 |