CN102901848A - Terminal box for connecting secondary winding of current transformer and test instrument - Google Patents
Terminal box for connecting secondary winding of current transformer and test instrument Download PDFInfo
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- CN102901848A CN102901848A CN2012104057264A CN201210405726A CN102901848A CN 102901848 A CN102901848 A CN 102901848A CN 2012104057264 A CN2012104057264 A CN 2012104057264A CN 201210405726 A CN201210405726 A CN 201210405726A CN 102901848 A CN102901848 A CN 102901848A
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- secondary winding
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- current transformer
- polar end
- terminals
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Abstract
The invention discloses a terminal box for connecting a secondary winding of a current transformer and a test instrument. The terminal box comprises a box body, wherein the box body is internally provided with a polar terminal bus, a non-polar-terminal bus, a ground terminal bus and at least two groups of double-pole double-throw selector switches; each double-pole double-throw selector switch is provided with two common terminals, two A terminals and two B terminals; the two A terminals are both connected to the ground terminal bus; and one of the two B terminals is connected to the polar-terminal bus, and the other of the two B terminals is connected to the non-polar-terminal bus. The secondary winding can be quickly switched by controlling the double-pole double-throw selector switches of the terminal box without changing the secondary winding of the current transformer to complete test items, such as the transformation ratio of the current transformer, polarities, volt-ampere characteristics and winding insulation.
Description
Technical field
The present invention relates to the terminal box that a kind of secondary winding in current transformer is connected with test apparatus.
Background technology
Current transformer is when testing, if do not survey the Secondary Winding open circuit, may make the current transformer Flux saturation, most of primary current is converted into excitation surge current, the secondary current error that causes tested Secondary Winding to record is larger, so when current transformer being carried out the test such as no-load voltage ratio, polarity, volt-ampere characteristic, the test winding need to be connected with test apparatus on the one hand, need on the other hand other are not surveyed the Secondary Winding short circuit in case open a way.Need frequently to change the Secondary Winding wiring in the process of the test, not only wasting time and energy, mis-wired also occurs easily.If use other test apparatuses to do experiment, then also need the above process of repetition.
Summary of the invention
The terminal box that the object of the present invention is to provide a kind of secondary winding in current transformer to be connected with test apparatus, solve the wiring of the secondary winding in current transformer frequent change of needs Secondary Winding when being connected with experimental apparatus, not only waste time and energy the problem of mis-wired also occurs easily.
For solving above-mentioned technical matters, the present invention is by the following technical solutions: the terminal box that a kind of secondary winding in current transformer is connected with test apparatus, comprise box body, be provided with polar end bus, non-polar end bus and earth terminal bus in the box body, and at least two group dpdt double-pole double-throw (DPDT) change-over switches, described dpdt double-pole double-throw (DPDT) change-over switch is provided with two common ports, two A ends and two B ends; Two common ports link to each other with secondary winding in current transformer, and described two A end all connects the earth terminal bus, described two B end, and one connects the polar end bus, and another connects the non-polar end bus.
For making the present invention play better technique effect:
Further technical scheme is that above-mentioned polar end bus and non-polar end bus are provided with the terminals that are complementary with the CT testing tool.
Further technical scheme is that in above-mentioned polar end bus and the non-polar end bus one and earth terminal bus are provided with the terminals that are complementary with insulating megger.
Compared with prior art, the invention has the beneficial effects as follows: can be in the situation of not changing the secondary winding in current transformer wiring, switch fast Secondary Winding by control terminal box dpdt double-pole double-throw (DPDT) change-over switch, finish the pilot projects such as current transformer ratio, polarity, volt-ampere characteristic, winding insulation.
Description of drawings
Fig. 1 is the structural representation of the embodiment of terminal box that is connected with test apparatus of secondary winding in current transformer of the present invention.
Fig. 2 is the synoptic diagram that another embodiment of terminal box that secondary winding in current transformer of the present invention is connected with test apparatus links to each other with the CT testing tool.
Fig. 3 is the synoptic diagram that another embodiment of terminal box that secondary winding in current transformer of the present invention is connected with test apparatus links to each other with insulating megger.
Among the figure, 1 is the polar end bus, and 2 is the non-polar end bus, and 3 is the earth terminal bus, and 4 is the dpdt double-pole double-throw (DPDT) change-over switch, and 5 is two A ends, and 6 is two common ports, and 7 is two B ends, and 8 is the CT testing tool, and 9 is insulating megger.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 shows an embodiment of the terminal box that secondary winding in current transformer of the present invention is connected with test apparatus: the terminal box that a kind of secondary winding in current transformer is connected with test apparatus, comprise box body, be provided with polar end bus, non-polar end bus and earth terminal bus in the box body, and two groups of dpdt double-pole double-throw (DPDT) change-over switches, described dpdt double-pole double-throw (DPDT) change-over switch is provided with two common ports, two A ends and two B ends; Two common ports link to each other with secondary winding in current transformer, and described two A end all connects the earth terminal bus, described two B end, and one connects the polar end bus, and another connects the non-polar end bus.What be worth proposition here is, because the Secondary Winding quantity of current transformer commonly used generally is no more than eight groups, so the dpdt double-pole double-throw (DPDT) change-over switch generally also is no more than eight groups, and has at least two groups just to have the problem that need to switch.
Fig. 2 shows a preferred embodiment of the terminal box that secondary winding in current transformer of the present invention is connected with test apparatus, and polar end bus and non-polar end bus are provided with the terminals that are complementary with the CT testing tool.
Fig. 3 shows another preferred embodiment of the terminal box that secondary winding in current transformer of the present invention is connected with test apparatus, and in polar end bus and the non-polar end bus one and earth terminal bus are provided with the terminals that are complementary with insulating megger.
Two corresponding in all Secondary Winding and dpdt double-pole double-throw (DPDT) change-over switch common ports are linked to each other caution area polarity end and non-polar end during connection by wire; Simultaneously testing tool polar end, non-polar end and the earth earth point being drawn binding post with this terminal box polar end bus, non-polar end bus with the earth terminal bus respectively links to each other.Operation dpdt double-pole double-throw (DPDT) change-over switch is so that only have corresponding two common ports of tested Secondary Winding and the conducting of two B ends, all the other are not surveyed two common ports corresponding to Secondary Winding and all hold conducting with two A, thereby the polar end of tested Secondary Winding and non-polar end respectively with terminal box polar end bus, the conducting of non-polar end bus, all the other are not surveyed Secondary Winding and all are shorted to earth terminal bus and ground connection, and can carry out tested Secondary Winding no-load voltage ratio, polarity, volt-ampere characteristic test this moment.
Insulating megger one end is connected with terminal box earth terminal bus terminals bus, and the other end is connected to the polar end bus or the non-polar end bus all can.Operation dpdt double-pole double-throw (DPDT) change-over switch is so that only have two public individual altogether ends and the conducting of two B ends corresponding to tested Secondary Winding, all the other do not survey two common ports corresponding to Secondary Winding all with the conducting of two A end, can carry out this moment tested Secondary Winding with all the other do not survey reach between Secondary Winding and the earth between Insulation Test.
Although invention has been described with reference to a plurality of explanatory embodiment of the present invention here, but, should be appreciated that those skilled in the art can design a lot of other modification and embodiments, these are revised and embodiment will drop within the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to building block and/or the layout of subject combination layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes also will be obvious.
Claims (3)
1. terminal box that secondary winding in current transformer is connected with test apparatus, it is characterized in that: comprise box body, be provided with polar end bus, non-polar end bus and earth terminal bus in the box body, and at least two group dpdt double-pole double-throw (DPDT) change-over switches, described dpdt double-pole double-throw (DPDT) change-over switch is provided with two common ports, two A ends and two B ends; Two common ports link to each other with secondary winding in current transformer, and described two A end all connects the earth terminal bus, described two B end, and one connects the polar end bus, and another connects the non-polar end bus.
2. the terminal box that is connected with test apparatus of secondary winding in current transformer according to claim 1, it is characterized in that: described polar end bus and non-polar end bus are provided with the terminals that are complementary with the CT testing tool.
3. the terminal box that is connected with test apparatus of secondary winding in current transformer according to claim 1 and 2 is characterized in that: in described polar end bus and the non-polar end bus one and earth terminal bus are provided with the terminals that are complementary with insulating megger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104057264A CN102901848A (en) | 2012-10-23 | 2012-10-23 | Terminal box for connecting secondary winding of current transformer and test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104057264A CN102901848A (en) | 2012-10-23 | 2012-10-23 | Terminal box for connecting secondary winding of current transformer and test instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102901848A true CN102901848A (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104057264A Pending CN102901848A (en) | 2012-10-23 | 2012-10-23 | Terminal box for connecting secondary winding of current transformer and test instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102901848A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931740A (en) * | 2015-06-23 | 2015-09-23 | 国网辽宁省电力有限公司检修分公司 | Rapid conversion device for test wiring of zero-flux CT secondary electronic module |
| CN105510863A (en) * | 2016-01-20 | 2016-04-20 | 国网上海市电力公司 | Short-circuiting system and short-circuiting method of secondary terminal of mutual inductor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4875152A (en) * | 1988-03-16 | 1989-10-17 | Foster William H | Electrical tap switch |
| CN101782638A (en) * | 2009-01-16 | 2010-07-21 | 武汉华瑞测控科技有限公司 | Calibration device and method capable of measuring multiple current transformers once |
| CN202330690U (en) * | 2011-11-09 | 2012-07-11 | 重庆博森电气（集团）有限公司 | Secondary conversion circuit for detection of current transformer |
| CN202956397U (en) * | 2012-10-23 | 2013-05-29 | 四川省电力公司攀枝花电业局 | Junction box connecting secondary winding of current transformer with testing device |
-
2012
- 2012-10-23 CN CN2012104057264A patent/CN102901848A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4875152A (en) * | 1988-03-16 | 1989-10-17 | Foster William H | Electrical tap switch |
| CN101782638A (en) * | 2009-01-16 | 2010-07-21 | 武汉华瑞测控科技有限公司 | Calibration device and method capable of measuring multiple current transformers once |
| CN202330690U (en) * | 2011-11-09 | 2012-07-11 | 重庆博森电气（集团）有限公司 | Secondary conversion circuit for detection of current transformer |
| CN202956397U (en) * | 2012-10-23 | 2013-05-29 | 四川省电力公司攀枝花电业局 | Junction box connecting secondary winding of current transformer with testing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931740A (en) * | 2015-06-23 | 2015-09-23 | 国网辽宁省电力有限公司检修分公司 | Rapid conversion device for test wiring of zero-flux CT secondary electronic module |
| CN104931740B (en) * | 2015-06-23 | 2018-11-16 | 国网辽宁省电力有限公司检修分公司 | Quick switching device for Zero flux CT secondary electron module test wiring |
| CN105510863A (en) * | 2016-01-20 | 2016-04-20 | 国网上海市电力公司 | Short-circuiting system and short-circuiting method of secondary terminal of mutual inductor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130130 |