CN202872359U - Secondary open circuit protector of current transformer - Google Patents
Secondary open circuit protector of current transformer Download PDFInfo
- Publication number
- CN202872359U CN202872359U CN 201220592384 CN201220592384U CN202872359U CN 202872359 U CN202872359 U CN 202872359U CN 201220592384 CN201220592384 CN 201220592384 CN 201220592384 U CN201220592384 U CN 201220592384U CN 202872359 U CN202872359 U CN 202872359U
- Authority
- CN
- China
- Prior art keywords
- open circuit
- circuit protector
- normally closed
- current transformer
- instrument transformer
- 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
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides a secondary open circuit protector of a current transformer. The secondary open circuit protector of the current transformer comprises an insulating upper cover, a PCB (printed circuit board) control board and an insulating lower cover, wherein a load terminal, normally closed and open switches, an indicator light and a transformer terminal are welded on the PCB control board; load is connected to the load terminal; the transformer terminal is connected with a transformer; the transformer is directly connected to the load when the normally closed and open switches are in a normally closed state; and two ends of the transformer are communicated when the normally closed and open switches are in a normally open state. The secondary open circuit protector of the current transformer is simple to operate, and just utilizes the normally closed and open switches to communicate two ends of the current transformer; and wiring operation on the current transformer can be safely carried out after the situation that the two ends of the current transformer are communicated is confirmed.
Description
Technical field
The utility model relates to power domain, relates in particular to a kind of protective device of high-low pressure current transformer.
Background technology
Current transformer is a kind of electric component of extensive use, can act on the electic protection that detects electric current in the alternating current circuit and use.Its principle is that large electric current is converted to little electric current to scale, and the little electric current with the conversion of regulation ratio offers various meterings, relaying protection and automatics use again.It isolates electrical secondary system and high voltage installation in this process, thereby guarantees the person and device security.Current transformer be in operation secondary side do not allow the open circuit; in case secondary side open circuit; just can produce very high voltage, jeopardize personal safety, affect the operation of metering, protective device and electronic load; cause secondary insulating to puncture; and making the supersaturation of current transformer magnetic circuit, the iron core heating burns out current transformer; also the possibility initiation fire causes a serious accident.Though have many kinds of measures to avoid the generation of open circuit accident at present, such as power operation, perhaps instrument transformer is pulled down the modes such as again wiring, but power equipment is in operation and can not cuts off the power supply and the complexity that instrument transformer is pulled down has been limited to these measures all can not well implement.
Therefore design a kind of be used for protecting the person and device security, not only succinct but also reliably second open circuit protector of current mutual inductor become the problem of needing solution in the present industry badly.
The utility model content
The purpose of this utility model is to provide a kind of second open circuit protector of current mutual inductor.
Correspondingly; a kind of second open circuit protector of current mutual inductor of the present utility model; comprise insulation loam cake, PCB control board and insulation lower cover; be welded with face terminals, normally closed normal open switch, indicator light and instrument transformer terminal on the described PCB control board, described face terminals is connected with load, and described instrument transformer connecting terminals is connected to instrument transformer; when normally closed normal open switch is in normally off; instrument transformer directly links to each other with load, and when normally closed normal open switch was in normally open, the instrument transformer two ends were connected.
As further improvement of the utility model, cover in the described insulation and be provided with switch resigning hole, indicator light resigning hole, face terminals installing hole and instrument transformer terminal installing hole.
As further improvement of the utility model, be covered with cavity under the described insulation and be positioned at some support columns of cavity.
As further improvement of the utility model, be covered with wiring hole in the described insulation, described insulation loam cake uses screw locking at support column by wiring hole.
As further improvement of the utility model, described PCB control board is provided with location hole, and described PCB control board uses screw locking at support column by location hole.
The beneficial effects of the utility model are: simple to operate, only need to use normally closed normal open switch, and with the conducting of current transformer two ends, after the affirmation conducting of current transformer two ends, just can carry out the wiring operation to current transformer safely.
Description of drawings
Figure 1 shows that the three-dimensional exploded view of the utility model one execution mode second open circuit protector of current mutual inductor;
Fig. 2 A is depicted as normally closed normal open switch and is in circuit theory diagrams under the normally off;
Fig. 2 B is depicted as normally closed normal open switch and is in circuit theory diagrams under the normally open.
Embodiment
Below with reference to embodiment shown in the drawings the utility model is described in detail.But these execution modes do not limit the utility model, and the conversion on the structure that those of ordinary skill in the art makes according to these execution modes, method or the function all is included in the protection range of the present utility model.
Shown in Fig. 1, Fig. 2 A, Fig. 2 B, the utility model one execution mode second open circuit protector of current mutual inductor comprises insulation loam cake 1, PCB control board 2 and insulation lower cover 3.
Insulation loam cake 1 sidewall is provided with some wiring holes 11, and the top is provided with switch resigning hole 12, indicator light resigning hole 13, face terminals installing hole 14 and instrument transformer terminal installing hole 15.Insulation lower cover 3 comprises cavity 31 and is positioned at some support columns 32 of cavity 31, and support column 32 is provided with screw thread, and the bottom of insulation lower cover 3 is provided with the guide-track groove (not shown) for installation.Be welded with face terminals 21, normally closed normal open switch 22, indicator light 23 and instrument transformer terminal 24 above the PCB control board 2, in addition, the side of PCB control board 2 is provided with some location holes 25.
During concrete the installation, at first face terminals 21, normally closed normal open switch 22, indicator light 23 and instrument transformer terminal 24 are welded on the PCB control board 2, then PCB control board 2 is put into the cavity 31 of insulation lower cover 3, be locked on the support column 32 in the insulation lower cover 3 by the some location holes 25 usefulness screws 4 on the PCB control board 2, thereby realize fixing to PCB control board 2; The loam cake 1 that then will insulate is placed on the insulation lower cover 3, be locked on the interior support column 32 of insulation lower cover 3 by some wiring holes 11 usefulness screws 4 of insulation on the loam cake 1, thereby realize fixing insulation loam cake 1, at this moment, face terminals 21 is installed on face terminals installing hole 14, instrument transformer terminal 24 is installed on instrument transformer terminal installing hole 15, and normally closed normal open switch 22 is positioned at switch resigning hole 12, and indicator light 23 is positioned at indicator light resigning hole 13; At last this protective device is installed on the DIN35mm standard guide rail (not shown), thereby realizes fixing this protective device.
During concrete operations, load is accessed face terminals 21, current transformer accesses instrument transformer terminal 24, realizes avoiding the defencive function of Current Transformer Secondary side open circuit by operating normally closed normal open switch 22.When switch was kept closed with the conducting of current transformer S1 end, then instrument transformer directly linked to each other with load, and instrument transformer keeps normal operation.When operating personnel need to change current transformer or change during circuit, toggle switch or when being stirred by the automatics control switch, then switch is connected instrument transformer S1 with the S2 two ends then, thus avoiding the instrument transformer phenomenon of opening a way, can operate instrument transformer safely.
The utility model second open circuit protector of current mutual inductor has following beneficial effect:
1. simple to operate, only need to use normally closed normal open switch, with current transformer two ends S1 and S2 conducting, after the affirmation conducting of current transformer two ends, just can carry out the wiring operation to current transformer safely, realize the second open circuit protection to current transformer;
2. can accomplish can normal running in when energising, satisfies the job requirement that load does not allow power operation; Simple for structure reliable, greatly reduce manufacturing cost;
3. single-phase, threephase load be can be widely used in, list, multichannel loading also can be applicable to;
4. between current transformer and normally closed normal open switch, be provided with indicator light, by the conducting whether of the light affirmation current transformer of indicator light two ends, thereby allow operating personnel can see more intuitively running status, after guaranteeing that on off state is correct, again current transformer is carried out the wiring operation.
Be to be understood that, although this specification is described according to execution mode, but be not that each execution mode only comprises an independently technical scheme, this narrating mode of specification only is for clarity sake, those skilled in the art should make specification as a whole, technical scheme in each execution mode also can through appropriate combination, form other execution modes that it will be appreciated by those skilled in the art that.
Above listed a series of detailed description only is specifying for feasibility execution mode of the present utility model; they are not to limit protection range of the present utility model, allly do not break away from equivalent execution mode or the change that the utility model skill spirit does and all should be included within the protection range of the present utility model.
Claims (5)
1. second open circuit protector of current mutual inductor; it is characterized in that: comprise insulation loam cake, PCB control board and insulation lower cover; be welded with face terminals, normally closed normal open switch, indicator light and instrument transformer terminal on the described PCB control board; described face terminals is connected with load; described instrument transformer connecting terminals is connected to instrument transformer, and when normally closed normal open switch was in normally off, instrument transformer directly linked to each other with load; when normally closed normal open switch was in normally open, the instrument transformer two ends were connected.
2. second open circuit protector of current mutual inductor according to claim 1 is characterized in that: cover in the described insulation and be provided with switch resigning hole, indicator light resigning hole, face terminals installing hole and instrument transformer terminal installing hole.
3. second open circuit protector of current mutual inductor according to claim 2 is characterized in that: be covered with cavity under the described insulation and be positioned at some support columns of cavity.
4. second open circuit protector of current mutual inductor according to claim 3 is characterized in that: be covered with wiring hole in the described insulation, described insulation loam cake by wiring hole with screw locking at support column.
5. second open circuit protector of current mutual inductor according to claim 4, it is characterized in that: described PCB control board is provided with location hole, described PCB control board by location hole with screw locking at support column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220592384 CN202872359U (en) | 2012-11-12 | 2012-11-12 | Secondary open circuit protector of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220592384 CN202872359U (en) | 2012-11-12 | 2012-11-12 | Secondary open circuit protector of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872359U true CN202872359U (en) | 2013-04-10 |
Family
ID=48039048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220592384 Expired - Fee Related CN202872359U (en) | 2012-11-12 | 2012-11-12 | Secondary open circuit protector of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202872359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812098A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Current transformer secondary open circuit protection device |
-
2012
- 2012-11-12 CN CN 201220592384 patent/CN202872359U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103812098A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Current transformer secondary open circuit protection device |
| CN103812098B (en) * | 2012-11-12 | 2016-08-03 | 苏州新宏博智能科技股份有限公司 | Second open circuit protector of current mutual inductor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102096040B (en) | Characteristic instrument device of circuit breaker | |
| CN102064601B (en) | Double-power supply automatic switching device of pole top switch | |
| CN219576637U (en) | Multi-protection control system for urban rail distribution box and distribution box | |
| CN102097752A (en) | Direct-current distribution panel for helicopter | |
| CN103812098A (en) | Current transformer secondary open circuit protection device | |
| CN102593863A (en) | Inverter with internal auxiliary power supply and power supply method adopted thereby | |
| CN202872359U (en) | Secondary open circuit protector of current transformer | |
| CN202651676U (en) | Low voltage switch cabinet drawer unit | |
| CN203071460U (en) | Switch cabinet integration power supply test vehicle | |
| CN103366985A (en) | Mobile power switch special for maintenance and debugging | |
| CN203397961U (en) | Special mobile power supply switch for maintenance and debugging | |
| CN202309085U (en) | Mining flame-proof type reactive power automatic compensation device | |
| CN202840256U (en) | Explosion-proof operating column | |
| CN202818800U (en) | Novel electrical control box | |
| CN206672849U (en) | A kind of special anti-overheat of power equipment disconnecting switch safe to use | |
| CN202797991U (en) | A 10kV line intelligent reactive power compensation device | |
| CN201242939Y (en) | Intelligent low-voltage power capacitor based on dry-type capacitance | |
| CN103474894A (en) | Intelligent mining explosive-proof type high-low voltage power distribution device | |
| CN201113857Y (en) | Intelligent type self-coupling voltage-reducing starting cabinet | |
| CN203481833U (en) | Dynamic reactive power compensation integration module | |
| CN202018930U (en) | Multifunctional three-phase digital display circuit breaker | |
| CN202663183U (en) | Dual-power automatic transfer switch | |
| CN103681141A (en) | Mounting structure of standby protective module of breaker replacement controller | |
| CN103545742A (en) | Intelligent load switch cabinet | |
| CN207637589U (en) | A kind of transformer cooler control circuit |
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: 20130410 Termination date: 20131112 |