CN201237622Y - On-line monitoring device for three-phase arrester in cabinet - Google Patents
On-line monitoring device for three-phase arrester in cabinet Download PDFInfo
- Publication number
- CN201237622Y CN201237622Y CNU200820034287XU CN200820034287U CN201237622Y CN 201237622 Y CN201237622 Y CN 201237622Y CN U200820034287X U CNU200820034287X U CN U200820034287XU CN 200820034287 U CN200820034287 U CN 200820034287U CN 201237622 Y CN201237622 Y CN 201237622Y
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- lightning
- cabinet
- operation counter
- phase
- mutual inductor
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Abstract
The utility model relates to an online monitoring device for a three-phase arrester inside a cabinet, mainly consisting of a lightning strike action counter and an early fault monitor. The online monitoring device has the characteristics of recording the number of lightning strike action as well as quickly judging whether the arrester has any fault. A high-sensitivity ammeter can be used to measure the zero-sequence current, and whether the arrester has early fault can be quickly judged through the increasing amount of the zero-sequence current so as to provide an effective guarantee for timely clearing the fault of the arrester. The utility model is most suitable for being installed on various switch cabinets.
Description
Technical field
The utility model relates to a kind of performance to the three-phase lightning protector in the switch cubicle and carries out device for monitoring, belongs to the protection field of power equipment.
Background technology
All three-phase lightning protector must be housed in existing height, the Medium Voltage Switchgear, whether the equipment that is used for the protection switch cabinet exempts from thunderbolt and damages, but normal for the performance of lightning arrester itself, does not also still have special-purpose on-Line Monitor Device at present.
Summary of the invention
The purpose of this utility model is can't monitor the weak point of lightning arrester fault in order to solve above-mentioned existing switch cubicle, designs a kind ofly can count record thunderbolt number of times, can judge whether three-phase lightning protector on-Line Monitor Device in the out of order cabinet of lightning arrester again rapidly.
Three-phase lightning protector on-Line Monitor Device in the cabinet of the present utility model mainly comprises thunderbolt operation counter and initial failure monitor.
Described initial failure monitor mainly is made up of highly sensitive reometer, and the two ends of described reometer are connected between the summing point and ground wire of three lightning arrester persistent currents.Wherein said reometer is digital micro ammeter or pointer microampere meter.
Described thunderbolt operation counter, can use the display screen counting, its structure mainly comprises dash current mutual inductor, isolating transformer, rectifier, the electronic switch that is contained on the lightning arrester lead-in wire, single-chip microcomputer and display screen, each phase signals of described dash current mutual inductor output triggers electronic switch after isolating transformer and rectifier rectification filtering, the output signal of electronic switch is delivered to single-chip microcomputer and is carried out the discriminatory analysis processing, and the output signal of single-chip microcomputer drives the action frequency that display screen shows thunderbolt.
Described thunderbolt operation counter, also can use traditional operation counter, its structure mainly comprises dash current mutual inductor, isolating transformer, rectifier and the operation counter that is contained on the lightning arrester lead-in wire, and each phase signals of described dash current mutual inductor output is through the action frequency of isolating transformer and rectifier rectification filtering rear drive operation counter meter record thunderbolt.
Three-phase lightning protector on-Line Monitor Device in the cabinet of the present utility model, owing to be provided with thunderbolt operation counter and initial failure monitor simultaneously, have and to count record thunderbolt action frequency, can judge whether out of order characteristics of lightning arrester again rapidly, the amplitude that particularly makes full use of same group the persistent current of three normal lightning arresters when normal operation equates substantially and phase place also is mutually 120 ° character, the vector of taking persistent current with three-phase lightning protector to be superimposed can to make the three-phase persistent current and near or null method, measure zero-sequence current and can judge rapidly by the recruitment of zero-sequence current whether this group lightning arrester initial failure occurs with highly sensitive reometer, provide effective guarantee in time getting rid of the lightning arrester fault.The most suitable being installed on the various switch cubicles.
Description of drawings
Accompanying drawing 1 is a kind of electrical block diagram of the present utility model;
Accompanying drawing 2 is another kind of electrical block diagrams of the present utility model.
Embodiment
Accompanying drawing is non-limiting to disclose 2 specific embodiments of the present utility model, and the utility model will be further described below in conjunction with accompanying drawing.
Three-phase lightning protector on-Line Monitor Device in the cabinet of the present utility model mainly comprises thunderbolt operation counter and initial failure monitor.
Described initial failure monitor mainly is made up of highly sensitive reometer, and the two ends of described reometer are connected between the summing point 3 and ground wire 2 of persistent current of three lightning arresters 4.Wherein said reometer is digital micro ammeter 1 (referring to accompanying drawing 1) or pointer microampere meter 11 (referring to accompanying drawing 2).
Described thunderbolt operation counter, can use the display screen counting, its structure as shown in Figure 1, mainly comprise the dash current mutual inductor 5, isolating transformer 6, rectifier 7, the electronic switch 8 that are contained on lightning arrester 4 lead-in wires, single-chip microcomputer 9 and display screen 10, each phase signals of described dash current mutual inductor 5 outputs triggers electronic switch 8 behind isolating transformer 6 and rectifier 7 rectifying and wave-filterings, the output signal of electronic switch 8 is delivered to single-chip microcomputer 9 and is carried out the discriminatory analysis processing, and the output signal of single-chip microcomputer drives the action frequency that display screen 10 shows thunderbolt.Described single-chip microcomputer is selected models such as pic156T362 or pic16F873 for use.
Described thunderbolt operation counter, also can use traditional operation counter, its structure as shown in Figure 2, mainly comprise the dash current mutual inductor 5, isolating transformer 6, rectifier 7 and the operation counter 12 that are contained on lightning arrester 4 lead-in wires, each phase signals of described dash current mutual inductor 5 outputs is through the action frequency of isolating transformer 6 and the 12 record thunderbolts of rectifier 7 rectifying and wave-filtering rear drive operation counters.
Claims (4)
1, three-phase lightning protector on-Line Monitor Device in a kind of cabinet, it is characterized in that comprising thunderbolt operation counter and initial failure monitor, described initial failure monitor mainly is made up of highly sensitive reometer, and the two ends of this reometer are connected between the summing point and ground wire of three lightning arrester persistent currents; Dash current mutual inductor in the thunderbolt operation counter is contained on the lead-in wire of lightning arrester.
2, three-phase lightning protector on-Line Monitor Device in the cabinet as claimed in claim 1 is characterized in that described reometer is digital micro ammeter or pointer microampere meter.
3, three-phase lightning protector on-Line Monitor Device in the cabinet as claimed in claim 1 or 2, the operation counter that it is characterized in that being struck by lightning comprises dash current mutual inductor, isolating transformer, rectifier, the electronic switch that is contained on the lightning arrester lead-in wire, single-chip microcomputer and display screen, each phase signals of described dash current mutual inductor output triggers electronic switch after isolating transformer and rectifier rectification filtering, the output signal of electronic switch is delivered to single-chip microcomputer and is carried out the discriminatory analysis processing, and the output signal of single-chip microcomputer drives the action frequency that display screen shows thunderbolt.
4, three-phase lightning protector on-Line Monitor Device in the cabinet as claimed in claim 1 or 2, the operation counter that it is characterized in that being struck by lightning comprises dash current mutual inductor, isolating transformer, rectifier and the operation counter that is contained on the lightning arrester lead-in wire, and each phase signals of described dash current mutual inductor output is through the action frequency of isolating transformer and rectifier rectification filtering rear drive operation counter meter record thunderbolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820034287XU CN201237622Y (en) | 2008-04-22 | 2008-04-22 | On-line monitoring device for three-phase arrester in cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820034287XU CN201237622Y (en) | 2008-04-22 | 2008-04-22 | On-line monitoring device for three-phase arrester in cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201237622Y true CN201237622Y (en) | 2009-05-13 |
Family
ID=40650355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820034287XU Expired - Fee Related CN201237622Y (en) | 2008-04-22 | 2008-04-22 | On-line monitoring device for three-phase arrester in cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201237622Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499762A (en) * | 2013-09-30 | 2014-01-08 | 河南开启电力实业有限公司 | Online detection device for leakage current of lightning arrester of power distribution network |
| CN110940931A (en) * | 2019-09-18 | 2020-03-31 | 国网浙江省电力有限公司金华供电公司 | Lightning arrester leakage current online monitoring system and method |
| CN114740288A (en) * | 2022-03-10 | 2022-07-12 | 云南电网有限责任公司电力科学研究院 | Lightning arrester fault diagnosis method and device, electronic equipment and storage medium |
| CN118033350A (en) * | 2024-04-11 | 2024-05-14 | 江苏安之技科技发展有限公司 | Wireless acquisition and monitoring system and method for operating parameters of lightning arrester |
-
2008
- 2008-04-22 CN CNU200820034287XU patent/CN201237622Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499762A (en) * | 2013-09-30 | 2014-01-08 | 河南开启电力实业有限公司 | Online detection device for leakage current of lightning arrester of power distribution network |
| CN110940931A (en) * | 2019-09-18 | 2020-03-31 | 国网浙江省电力有限公司金华供电公司 | Lightning arrester leakage current online monitoring system and method |
| CN114740288A (en) * | 2022-03-10 | 2022-07-12 | 云南电网有限责任公司电力科学研究院 | Lightning arrester fault diagnosis method and device, electronic equipment and storage medium |
| CN118033350A (en) * | 2024-04-11 | 2024-05-14 | 江苏安之技科技发展有限公司 | Wireless acquisition and monitoring system and method for operating parameters of lightning arrester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20110422 |