CN201886106U - Direct current leakage current measuring device - Google Patents
Direct current leakage current measuring device Download PDFInfo
- Publication number
- CN201886106U CN201886106U CN 201020650049 CN201020650049U CN201886106U CN 201886106 U CN201886106 U CN 201886106U CN 201020650049 CN201020650049 CN 201020650049 CN 201020650049 U CN201020650049 U CN 201020650049U CN 201886106 U CN201886106 U CN 201886106U
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- Prior art keywords
- direct current
- leakage current
- breaker
- isolating switch
- sensor
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- 239000004020 conductor Substances 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 31
- 238000005259 measurement Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
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Abstract
The utility model discloses a direct current leakage current measuring device which comprises a modular miniature direct current breaker and a direct current leakage current sensor. The modular miniature direct current breaker adopts a positive and negative electrode direct current breaker which can break a positive electrode power supply and a negative electrode power supply and comprises an overload protection release or a short circuit protection release; the direct current leakage current sensor comprises a casing, a transformer, and an electronic component plate for detecting leakage current; two conductors penetrates the transformer; polarities of direct current flowing through the two conductors are opposite; the output terminal of the transformer is connected with the input terminal of the electronic component plate; and the direct current leakage current sensor is arranged at the incoming line terminal or the outgoing line terminal of the modular miniature direct current breaker. The direct current leakage current sensor can be separated from the modular miniature direct current breaker, and can also be combined with the modular miniature direct current breaker into a whole body. The direct current leakage current sensor and the modular miniature direct current breaker can be installed and maintained together during installation or maintenance, and the direct current leakage current measuring device has the advantages that the device is simple to install and convenient to maintain, and the like.
Description
Technical field
The utility model relates to the DC leakage current measurement mechanism, belongs to direct current IT system insulating monitoring field and direct current earth leakage protection field.
Background technology
The insulated on-line monitoring of straight-flow system generally can be divided into two parts, and promptly ground connection is detected and earthing wire-selecting.Ground connection detection is by the calculating to straight-flow system positive and negative busbar resistance to earth, in time finds insulation decline fault, and earthing wire-selecting then is used for determining the branch road that insulation descends takes place, and avoids blindly operating a switch outage, dwindles fault coverage.The realization of earthing wire-selecting, general by two kinds of methods realizations, one is the signal tracing method, the low frequency signal source that adds is injected straight-flow system, the branch road that this low frequency signal occurs is fault branch, and, determine this branch road insulating resistance value in the loop by the amplitude that this signal is produced and the analysis of phase change; It two is the leakage current method, by the switching of electric bridge, makes the branch road both positive and negative polarity size of current that earth fault takes place unequal, and the both positive and negative polarity difference between currents is leakage current, calculates this branch road insulating resistance value by detecting leakage current value and both positive and negative polarity voltage-to-ground value.
Fig. 1 is typical D.C. isolation monitoring system arrangement plan, and wherein, KM+, KM-are respectively the positive and negative busbar of straight-flow system, and GND is a earth, and K1～Kn is the isolating switch of protection branch road, and CT1～CTn is the direct current electricity leakage sensor.After insulation decline fault took place, insulation monitoring and warning device carried out earthing wire-selecting by the leakage current value of gathering CT1～CTn.
Present existing direct current electricity leakage sensor as Fig. 2, generally adopts independently mounting means, and promptly electricity leakage sensor is installed on the leading-out terminal of isolating switch by screw or guide rail, and electricity leakage sensor current supply circuit and order circuit are all drawn from the D.C. isolation monitoring device.Because be stand alone type, loaded down with trivial details, shortcoming such as easy care not is installed so this direct current electricity leakage sensor generally exists.
The utility model content
The purpose of this utility model provides a kind of electricity leakage sensor with new structure, it can overcome existing electricity leakage sensor install loaded down with trivial details, shortcoming such as easy care not.
Technical solution of the present utility model is:
A kind of DC leakage current measurement mechanism is made up of modularization small-sized DC isolating switch and direct current electricity leakage sensor, wherein:
Described modularization small-sized DC isolating switch is positive and negative two utmost point dc circuit breakers of energy disjunction cathode power supply and negative power supply, and it has overload protection electrical apparatus release or short-circuit protection electrical apparatus release;
Described direct current electricity leakage sensor is made up of the electric sub-member plate of housing, mutual inductor, detection leakage current, passes two conductors in the mutual inductor, and the DC current polarity that flows through two conductors is opposite, and the output of mutual inductor connects the input of electric sub-member plate;
Described direct current electricity leakage sensor is arranged at the end of incoming cables or the leading-out terminal of modularization small-sized DC isolating switch.
Described modularization small-sized DC isolating switch and direct current electricity leakage sensor can be splits, also make one.
Compared with prior art, adopt direct current electricity leakage sensor of the present utility model, when installing or safeguarding, electricity leakage sensor can be installed with modularization small-sized DC isolating switch or safeguarded, have simple installation, advantage such as easy to maintenance.
Description of drawings
Fig. 1 is typical D.C. isolation monitoring system arrangement plan;
Fig. 2 is present existing direct current electricity leakage sensor;
Fig. 3 is the utility model technical solution technical schematic diagram;
Fig. 4 is direct current electricity leakage sensor and an isolating switch assembling stereogram in the utility model embodiment 1;
Fig. 5 is a direct current electricity leakage sensor stereographic map in the utility model embodiment 1;
Fig. 6 is a direct current electricity leakage sensor exploded view in the utility model embodiment 1;
Fig. 7 is direct current electricity leakage sensor and an isolating switch assembling stereogram in the utility model embodiment 2;
Fig. 8 is a direct current electricity leakage sensor stereographic map in the utility model embodiment 2;
Fig. 9 is a direct current electricity leakage sensor exploded view in the utility model embodiment 2.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Fig. 3 is the utility model technical solution schematic diagram, and the direct supply both positive and negative polarity is inserted by modularization miniature circuit breaker 5, is connected to load by direct current electricity leakage sensor 6; Direct current electricity leakage sensor 6 is made up of the electric sub-member plate 3 of housing 4, mutual inductor 1 and detection leakage current; Pass two dc wires 22 (positive pole and negative pole) in the mutual inductor 1 simultaneously; Medelling miniature circuit breaker 5 structurally can be whole with DC leakage current sensor 6, also can be split.
Embodiment 1:
As Fig. 4, Fig. 5, shown in Figure 6, electricity leakage sensor of the present utility model comprises mutual inductor 1, main circuit connection combination 2, electric sub-member plate 3, shell 4.Wherein:
Main circuit connection combination 2 comprises lug plate 21, copper conductor 22, connection terminal combination 23 and stator 24, and lug plate 21, stator 24 are fixed together with shell 4, and as the critical piece that connects isolating switch 25 (Fig. 3).Wherein, lug plate 21 is used for and being electrically connected of modularization small-sized DC isolating switch 25, stator 24 is used for the mechanical connection with modularization small-sized DC isolating switch 25, and lug plate 21 inserts in the connection terminal of isolating switch simultaneously with stator 24, and is fastening with the screw of breaker connection terminal.Article two, copper conductor 22 passes mutual inductor 1, and is connected with load after connection terminal combination 23 links to each other again, and these two leads are the lead of this road electric, and connection terminal makes up 23 and is mainly used in the wiring of direct current electricity leakage sensor.
The Secondary Winding of mutual inductor 1 links to each other with electric sub-member plate 3.
The electronic circuit board 31 of electric sub-member plate 3 is exported change calculations DC leakage current value by the secondary that detects mutual inductor 1, and is connected with external unit by connection terminal 32.
Shell 4 mainly comprises right casing 41, middle shell 42, left shell 44, rivet 43 and label 45, and right casing 41, middle shell 42, left shell 44 be by rivet 43 riveted joints, label 45 be pasted on rivet shell directly over.
Embodiment 2:
As Fig. 7, Fig. 8, shown in Figure 9, electricity leakage sensor of the present utility model comprises mutual inductor 1, main circuit connection combination 2, electric sub-member plate 3, shell 4.Wherein:
Main circuit connection combination 2 comprises lug plate 21, copper conductor 22, connection terminal combination 23 and stator 24, lug plate 21, stator 24 are fixed together with shell 4, and as the critical piece that connects isolating switch 5, article two, copper conductor 22 passes mutual inductor 1, link to each other with connection terminal combination 23, the DC current polarity that flows through two copper conductors 22 is opposite, and connection terminal combination 23 is mainly used in the wiring of direct current electricity leakage sensor.
The Secondary Winding of mutual inductor 1 links to each other with electric sub-member plate 3.
The electronic circuit board 31 of electric sub-member plate 3, electronic circuit board 32 are exported change calculations DC leakage current value by the secondary that detects mutual inductor 1, and are connected with external unit by connection terminal 33.
Shell 4 mainly comprises right casing 41, middle shell 42, left shell 44, rivet 43 and label 45, and right casing 41, middle shell 42, left shell 44 be by rivet 43 riveted joints, label 45 be pasted on rivet shell directly over.
Different is with embodiment 1, and present embodiment has leakage current or insulation resistance Presentation Function on the spot, can reflect the leakage current value or the insulating resistance value of this branch road now.
Claims (3)
1. a DC leakage current measurement mechanism is made up of modularization small-sized DC isolating switch and direct current electricity leakage sensor, it is characterized in that:
Described modularization small-sized DC isolating switch is positive and negative two utmost point dc circuit breakers of energy disjunction cathode power supply and negative power supply, and it has overload protection electrical apparatus release or short-circuit protection electrical apparatus release;
Described direct current electricity leakage sensor is made up of the electric sub-member plate of housing, mutual inductor, detection leakage current, passes two conductors in the mutual inductor, and the DC current polarity that flows through two conductors is opposite, and the output of mutual inductor connects the input of electric sub-member plate;
Described direct current electricity leakage sensor is arranged at the end of incoming cables or the leading-out terminal of modularization small-sized DC isolating switch.
2. DC leakage current measurement mechanism as claimed in claim 1 is characterized in that:
Described modularization small-sized DC isolating switch and direct current electricity leakage sensor are splits.
3. DC leakage current measurement mechanism as claimed in claim 1 is characterized in that
Described modularization small-sized DC isolating switch and direct current electricity leakage sensor are made one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020650049 CN201886106U (en) | 2010-12-03 | 2010-12-03 | Direct current leakage current measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020650049 CN201886106U (en) | 2010-12-03 | 2010-12-03 | Direct current leakage current measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201886106U true CN201886106U (en) | 2011-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020650049 Expired - Lifetime CN201886106U (en) | 2010-12-03 | 2010-12-03 | Direct current leakage current measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201886106U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486507A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Direct current leakage measurement device |
| CN103163357A (en) * | 2011-12-19 | 2013-06-19 | Ls产电株式会社 | Multi-channel leakage current monitoring system |
| CN103852643A (en) * | 2012-12-04 | 2014-06-11 | 本德尔有限两合公司 | Insulation monitoring device with measuring circuit interruption |
| CN103983835A (en) * | 2014-05-22 | 2014-08-13 | 南京深科博业电气股份有限公司 | Direct current small-current transformer and method for measuring current of direct current small-current transformer |
| CN106383290A (en) * | 2016-09-26 | 2017-02-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Test method for on-line test of leakage current of direct-current arrester |
-
2010
- 2010-12-03 CN CN 201020650049 patent/CN201886106U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486507A (en) * | 2010-12-03 | 2012-06-06 | 北京人民电器厂有限公司 | Direct current leakage measurement device |
| CN103163357A (en) * | 2011-12-19 | 2013-06-19 | Ls产电株式会社 | Multi-channel leakage current monitoring system |
| CN103852643A (en) * | 2012-12-04 | 2014-06-11 | 本德尔有限两合公司 | Insulation monitoring device with measuring circuit interruption |
| CN103983835A (en) * | 2014-05-22 | 2014-08-13 | 南京深科博业电气股份有限公司 | Direct current small-current transformer and method for measuring current of direct current small-current transformer |
| CN106383290A (en) * | 2016-09-26 | 2017-02-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Test method for on-line test of leakage current of direct-current arrester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |