CN203011948U - Current transformer characteristic test secondary connection device - Google Patents
Current transformer characteristic test secondary connection device Download PDFInfo
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- CN203011948U CN203011948U CN 201220561230 CN201220561230U CN203011948U CN 203011948 U CN203011948 U CN 203011948U CN 201220561230 CN201220561230 CN 201220561230 CN 201220561230 U CN201220561230 U CN 201220561230U CN 203011948 U CN203011948 U CN 203011948U
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Abstract
The utility model relates to a current transformer characteristic test secondary connection device, belonging to the field of power system detection. According to the current transformer characteristic test secondary connection device, one end of a double-pole double-throw switch is connected with a connecting terminal, the other end of the switch can be placed at a testing terminal or a short circuit terminal. The connecting terminal is connected with a conducting wire introduced from a secondary winding of a current transformer, and the short circuit terminal is grounded. The switching between two states of 'connection test' and 'short circuit grounding' can be completed through toggling the double-pole double-throw switch, the frequency of connecting and changing wires is greatly reduced, and the testing working is simplified. At the same time, since the double-pole double-throw switch can only either be the 'connection test' or the 'short circuit grounding' state, the safety hazard of a transformer secondary open circuit is eliminated.
Description
Technical field
The utility model relates to a kind of current transformer characteristic test secondary wiring device, belongs to the electric system detection field.
Background technology
The mode of connection of existing measuring current mutual inductor ratio, volt-ampere, polarity has very large drawback, has had a strong impact on our test efficiency and test mass.When carrying out the current transformer characteristic testing experiment, in tester when work, only be connected with tested one group utmost point winding of current transformer, and in real work, the tested device secondary winding can reach at most six groups.Tester will be tested successively to each group time utmost point winding.When to a certain armature winding energising wherein, other non-tested secondary winding must be used the shorting stub short circuit in addition.
For example: when test 1S, 2S, 3S, 4S, 5S, the necessary short circuit of each secondary winding of 6S, during test 2S, 1S, 3S, 4S, 5S, the necessary short circuit of each secondary winding of 6S.One group of secondary winding of every like this test is above operation repeatedly.Work together extremely loaded down with trivial details; Above-mentioned wiring repeatedly at the construction field (site) increases intensity of workers, inefficiency; And, the secondary output line of test apparatus, due to the too high as easy as rolling off a log damage of Reusability frequency and broken string, increased staff's labour intensity, reduced test efficiency, the wiring meeting causes that test is tired with wire terminal place repeatedly simultaneously, and injury, broken string etc. may cause Current Transformer Secondary to open by mistake the potential safety hazard on road.Can make like this Current Transformer Secondary open circuit, be very easy to the tested high-tension apparatus of damage.Bring potential safety hazard to safety in production.
[0004]Chinese invention patent " current transformer polarity tester of neutral point of transformer " (application number: CN200910172240.9) a kind of transformer neutral point current transformer tester, there are four connection terminals this tester inside, a pointer direct current electric current milliammeter A, a test button, outside have four test wires.Tester of the present invention can accurately check the polarity of transformer neutral point TA Secondary Winding, mistake access when avoiding wiring; Improve the transformer reliability of operation, ensured the stable operation of electric system.But should invent the also problem of unresolved frequent wiring.
Summary of the invention
deficiency for background technology, the utility model is connected with connection terminal by double-point double-throw switch one end, the other end can be placed in testing terminal or short-circuited terminal, connection terminal is connected with the wire of drawing of the secondary winding of current transformer, short-circuited terminal ground connection, realize only need to stirring double-point double-throw switch and can complete switching between " connecting test " and " short circuit grounding " two states, greatly reduced and connect the thread-changing frequency, simplified test job, simultaneously because double-point double-throw switch can only be one of " connecting test " and " short circuit grounding " two states, so eliminate the potential safety hazard of mutual inductor second open circuit.
The technical solution of the utility model is:
A kind of current transformer characteristic test secondary wiring device, comprise connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch, double-point double-throw switch one end is connected with connection terminal, the other end can be placed in testing terminal or short-circuited terminal, it is characterized in that: connection terminal is connected with the wire of drawing of the secondary winding of current transformer, short-circuited terminal ground connection.Its beneficial effect is: termination has alleviated the labour intensity of test connection, improved test efficiency, reduced connecing the thread-changing frequency, thereby extended connection terminal and tested the life-span of using line, evaded largely the potential safety hazard of bringing with the line breakdown because of test; Simultaneously can reduce connection times, avoid maloperation.
Current transformer characteristic test secondary wiring device as above, it is characterized in that: described connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch are respectively N pair, and wherein N is greater than 1.Its beneficial effect is: can test simultaneously N current transformer.
Current transformer characteristic test secondary wiring device as above, it is characterized in that: described connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch are respectively 6 pairs.Its beneficial effect is: can test simultaneously 6 current transformers, satisfy the requirement of most of current transformer tests.
Current transformer characteristic as above test secondary wiring device is characterized in that: described connection terminal two ends shunt voltage table.Its beneficial effect is: can monitor at any time the tested winding voltage value in process of the test.
Current transformer characteristic as above test secondary wiring device is characterized in that: described connection terminal two ends series current table.Its beneficial effect is: can monitor at any time the tested winding electric flow valuve in process of the test.
Description of drawings:
Fig. 1 simplex winding double-pole double-throw switch circuit schematic diagram;
Fig. 2 termination circuit theory diagrams;
Fig. 3 current transformer characteristic test secondary wiring device panel arranges sketch.
Embodiment
For realizing the switching between " connecting test " and " short circuit grounding " two states, the double-point double-throw switch wiring that each winding is equipped with is as shown in Figure 1: the intermediate terminal of switch be " connection terminal ", the wire S1, the S2 that draw of the secondary winding of connection current transformer.
When double-point double-throw switch was placed in " testing terminal " shelves, corresponding mutual inductor Secondary Winding was namely connected with tester, enters mutual inductor attribute testing test mode; " testing terminal " is connected with the measurement port of Testing Instrument for Volt-ampere Characteristic; When double-point double-throw switch is placed in " short-circuited terminal " shelves, the Secondary Winding short circuit ground connection that is access in.And can pass through the termination earthing of casing.Be in non-tested state, the danger of guaranteeing not produce the mutual inductor second open circuit.
Testing requirement for the current transformer of many groups Secondary Winding, double-point double-throw switch in conjunction with simplex winding, can be with N(N greater than 1) group single current mutual inductor characteristic test secondary wiring device as shown in Figure 1 carries out composite design, and Fig. 2 is 6 groups of situations that current transformer characteristics test secondary wiring device makes up.
By controlling the state of double-point double-throw switch K1-K6 corresponding to each secondary terminals, can select respectively " testing terminal " shelves and " short-circuited terminal " shelves, reach tested winding access tester, the purpose of non-tested winding short circuit ground connection.
As shown in Figure 3, current transformer characteristic test secondary wiring device panel arranges sketch.By changing on off state corresponding to each winding, realize the switching of each winding " input logical " and " short circuit is logical ", during " input is logical " state with corresponding winding access tester test port, during " short circuit is led to " state with corresponding winding short circuit ground connection.Also have " voltage table ", " reometer " connection terminal on the panel of termination, respectively in parallel with " instrument secondary input terminal ", connect, can by accessing corresponding instrument, monitor at any time the tested winding voltage current value in process of the test.Experiment power supply with reometer, when abnormal reading appears in voltage table, can immediately by the power switch deenergization on panel, prevent from burning out tested winding in monitoring by the access of the power switch on termination panel tester.During work, the two ends of 6 Secondary Winding of current transformer are connected on respectively termination " 1S1-1S2 ", " 2S1-2S2 ", " 3S1-3S2 ", " 4S1-4S2 ", " 5S1-5S2 ", " on " 6S1-6S2 " connection terminal; the switch that tested winding is corresponding transfers to " input is logical ", and other switches are positioned at " short circuit is logical ".Access respectively voltage table, the reometer of corresponding range at voltage table, reometer terminal." instrument secondary output terminals " is connected to tester test connection port, the call through test power supply, and the operational testing instrument can carry out mutual inductor Secondary Winding attribute testing.After completing current winding test, a switch that only needs work as front winding transfers to " short circuit is logical " shelves, and the switch of winding to be tried is transferred to " input is logical " grade, has namely completed the thread-changing process.When selection is made, used and to have born the two of large electric current and put switch, to satisfy the tester Secondary Winding up to the demand of 10A test current.But the secondary terminals binding post is selected the 16A insert type, is convenient to the connection with mutual inductor and tester.Panel adopts the location of epoxy resins insulation plate carrying all parts.Outer version adopts wear-resisting aluminium alloy steel plate attractive in appearance, and namely safety has increased again serviceable life.
Claims (5)
1. a current transformer characteristic is tested secondary wiring device, comprise connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch, double-point double-throw switch one end is connected with connection terminal, the other end can be placed in testing terminal or short-circuited terminal, it is characterized in that: connection terminal is connected with the wire of drawing (S1, S2) of the secondary winding of current transformer, short-circuited terminal ground connection.
2. current transformer characteristic as claimed in claim 1 is tested secondary wiring device, and it is characterized in that: described connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch are respectively N pair, and wherein N is greater than 1.
3. current transformer characteristic as claimed in claim 1 is tested secondary wiring device, and it is characterized in that: described connection terminal, testing terminal, short-circuited terminal and double-point double-throw switch are respectively 6 pairs.
4. as claim 1,2 or 3 described current transformer characteristics test secondary wiring devices, it is characterized in that: described connection terminal two ends shunt voltage table.
5. as claim 1,2 or 3 described current transformer characteristics test secondary wiring devices, it is characterized in that: described connection terminal two ends series current table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220561230 CN203011948U (en) | 2012-10-30 | 2012-10-30 | Current transformer characteristic test secondary connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220561230 CN203011948U (en) | 2012-10-30 | 2012-10-30 | Current transformer characteristic test secondary connection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203011948U true CN203011948U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220561230 Expired - Fee Related CN203011948U (en) | 2012-10-30 | 2012-10-30 | Current transformer characteristic test secondary connection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203011948U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944700A (en) * | 2012-10-30 | 2013-02-27 | 武汉华源电力工程有限责任公司 | Secondary wiring device for test of characteristics of a current transformer |
| CN104297532A (en) * | 2014-11-06 | 2015-01-21 | 国家电网公司 | Wiring device for detecting voltage transformer |
| CN106124923A (en) * | 2016-06-17 | 2016-11-16 | 山东达驰电气有限公司 | A kind of three-phase transformer turn-to-turn fault detection circuit and detection method |
| CN106501750A (en) * | 2016-12-02 | 2017-03-15 | 国网四川省电力公司电力科学研究院 | A kind of voltage transformer site error detects secondary wiring device |
| CN108646133A (en) * | 2016-01-18 | 2018-10-12 | 辛兴华 | A kind of production method of current transformer Check up polarity termination |
| CN111398644A (en) * | 2020-03-31 | 2020-07-10 | 贵州电网有限责任公司 | Mutual inductor handover test switching device and switching method thereof |
-
2012
- 2012-10-30 CN CN 201220561230 patent/CN203011948U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944700A (en) * | 2012-10-30 | 2013-02-27 | 武汉华源电力工程有限责任公司 | Secondary wiring device for test of characteristics of a current transformer |
| CN102944700B (en) * | 2012-10-30 | 2015-11-18 | 武汉华源电力工程有限责任公司 | A kind of current transformer characteristic test secondary wiring device |
| CN104297532A (en) * | 2014-11-06 | 2015-01-21 | 国家电网公司 | Wiring device for detecting voltage transformer |
| CN104297532B (en) * | 2014-11-06 | 2017-03-08 | 国家电网公司 | Voltage transformer calibrating termination |
| CN108646133A (en) * | 2016-01-18 | 2018-10-12 | 辛兴华 | A kind of production method of current transformer Check up polarity termination |
| CN106124923A (en) * | 2016-06-17 | 2016-11-16 | 山东达驰电气有限公司 | A kind of three-phase transformer turn-to-turn fault detection circuit and detection method |
| CN106501750A (en) * | 2016-12-02 | 2017-03-15 | 国网四川省电力公司电力科学研究院 | A kind of voltage transformer site error detects secondary wiring device |
| CN111398644A (en) * | 2020-03-31 | 2020-07-10 | 贵州电网有限责任公司 | Mutual inductor handover test switching device and switching method thereof |
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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 |
Granted publication date: 20130619 Termination date: 20181030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |