CN202939258U - Current transformer polarity test device - Google Patents
Current transformer polarity test device Download PDFInfo
- Publication number
- CN202939258U CN202939258U CN 201220674784 CN201220674784U CN202939258U CN 202939258 U CN202939258 U CN 202939258U CN 201220674784 CN201220674784 CN 201220674784 CN 201220674784 U CN201220674784 U CN 201220674784U CN 202939258 U CN202939258 U CN 202939258U
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- current transformer
- battery box
- battery case
- battery
- transformer polarity
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Abstract
The utility model discloses a current transformer polarity test device, and relates to the technical field of electrical variable measuring instruments. The current transformer polarity test device comprises a battery box. More than four batteries which are serially connected together are arranged in the battery box, and the end portion of the battery box is provided with a positive electrode outgoing line and a negative electrode outgoing line which are electrically connected with the batteries in the battery box. The device can be fabricated by transforming a waste battery box, so advantages of easy material availability and low fabrication cost can be realized; more than four batteries are arranged in the battery box, so advantages of high capacity, obvious instrument pointer movement and easy observation can be realized, and the batteries are covered by the battery box, so that the advantage of easy utilization can be realized, the number of operators can be reduced, and the working efficiency can be improved.
Description
Technical field
The utility model relates to measures the electric variable Instrument technology field, relates in particular to a kind of current transformer Polarity experiment device.
Background technology
Current transformer is manufactured according to electromagnetic induction principle, and current transformer is comprised of closed iron core and winding.Its umber of turn seldom; string is measured in the circuit of electric current at needs; therefore it often has whole electric currents of circuit to flow through; the Secondary Winding turn ratio is more; be serially connected in measurement instrument and protection loop, current transformer is when work, and its secondary circuit is closed all the time; therefore the impedance of measurement instrument and protection loop series coil is very little, and the duty of current transformer approaches short circuit.
The transformer summation current transformer plays the voltage and current buffer action in first and second loop in relay protection secondary circuit; their first and second side has two and above leading-out terminal; the leading-out terminal of any side is with wrong; capital makes the phase place of secondary side change 180 degree; both affected the protective relaying device correct operation; affect again operation monitoring and the accident treatment of electric system, go back entail dangers to equipment and personal safety when serious.Therefore, the polarity correctness that correctly judges transformer (voltage transformer (VT)) summation current transformer is a very important job.
Traditional polarity detection method comprises that DC-method detects, and uses dry cell and highly sensitive moving-coil instrument to be measured.Detect polarity chron, the positive pole of battery is connected on the K end of primary winding, and the positive terminal of moving-coil instrument (as indicator type current meter or milivoltmeter) is connected on the K end of secondary coil.When switch S moment is closed, the gauge pointer deflection is turned right (positive dirction), and switch S moment while disconnecting, gauge pointer is partial to left-hand rotation (in the other direction), shows that connect mutual inductor first and second side terminal is same polarity, otherwise, be heteropolarity.While carrying out the current transformer polarity test, battery holds with hand the use that is cascaded in the past, maximum two batteries, and battery capacity is little like this, and the pointer reaction is sometimes not obvious, and battery is held and is inconvenient to use in addition, after using, easily loses, and causes and reuses difficulty.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of current transformer Polarity experiment device, uses described device to carry out easily the current transformer Polarity experiment, has improved work efficiency.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of current transformer Polarity experiment device, it is characterized in that comprising battery case, be provided with the above battery of four joints be connected in series in battery case, the end of battery case is provided with positive outside wire and the negative outside wire be electrically connected to battery in battery case.
Preferably: described positive outside wire and negative outside wire are provided with web member.
Preferably: the end of described web member is provided with the connecting pipe of tape insulation crust.
Preferably: described battery case comprises cassette holder and lid, and between described cassette holder and lid, clamping is connected.
Preferably: described battery case is provided with draw-in groove, is provided with insulating trip in draw-in groove.
The beneficial effect that adopts technique scheme to produce is: described device can be made by transformation old and useless battery box, draws materials conveniently, and cost of manufacture is low; Be provided with the above battery of four joints in battery case, capacity is large, and the gauge pointer action is large, the convenient observation, and battery is used by the battery case parcel is convenient, has reduced operating personnel, has improved work efficiency.In addition, the battery case of described device is provided with draw-in groove, is provided with insulating trip in draw-in groove, when not using, can use insulating trip that battery is disconnected, and prevents battery discharge, has extended the serviceable life of battery.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is plan structure schematic diagram of the present utility model;
Fig. 2 is the plan structure schematic diagram that the utility model removes lid;
Wherein: 1, the connecting pipe of battery case 11, cassette holder 12, lid 2, positive outside wire 3, negative outside wire 4, web member 5, battery 6, tape insulation crust.
Embodiment
As shown in Figure 1-2, a kind of current transformer Polarity experiment device, comprise battery case 1, be provided with the above battery 5 of four joints be connected in series in battery case, the end of battery case 1 is provided with positive outside wire 2 and the negative outside wire 3 be electrically connected to battery in battery case, and positive outside wire and negative outside wire are used respectively the wire of different colours, facilitate wiring, such as positive outside wire is used redness, negative outside wire is used black.Described positive outside wire 2 and negative outside wire 3 are provided with web member 4, and the end of described web member 4 is provided with the connecting pipe 6 of tape insulation crust, by web member or connecting pipe with current transformer is carried out to experiments of measuring after longer wire is connected.Described battery case 1 comprises cassette holder 11 and lid 12, and between described cassette holder 11 and lid 12, clamping is connected, and described battery case is provided with draw-in groove, is provided with insulating trip in draw-in groove.
In use, take off connecting pipe and use web member to be connected with long lead, and take out insulating trip, insulating trip is placed in draw-in groove, can be tested.Not the used time, put the connecting pipe of tape insulation crust in the end of web member, and use insulating trip that battery is disconnected.Described device can be made by transformation old and useless battery box, draws materials conveniently, and cost of manufacture is low; Be provided with the above battery of four joints in battery case, capacity is large, and the gauge pointer action is large, the convenient observation, and battery is used by the battery case parcel is convenient, has reduced operating personnel, has improved work efficiency.In addition, the battery case of described device is provided with draw-in groove, is provided with insulating trip in draw-in groove, when not using, can use insulating trip that battery is disconnected, and prevents battery discharge, has extended the serviceable life of battery.
Applied specific case herein principle of the present utility model and embodiment thereof are set forth, the explanation of above embodiment is just with helping understand method of the present utility model and core concept thereof.It should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (5)
1. a current transformer Polarity experiment device, it is characterized in that comprising battery case (1), be provided with the four joint above batteries (5) that are connected in series in battery case, the end of battery case (1) is provided with positive outside wire (2) and the negative outside wire (3) be electrically connected to battery in battery case.
2. a kind of current transformer Polarity experiment device according to claim 1, is characterized in that described positive outside wire (2) and negative outside wire (3) are provided with web member (4).
3. a kind of current transformer Polarity experiment device according to claim 2, is characterized in that the end of described web member (4) is provided with the connecting pipe (6) of tape insulation crust.
4. a kind of current transformer Polarity experiment device according to claim 1, is characterized in that described battery case (1) comprises cassette holder (11) and lid (12), and between described cassette holder (11) and lid (12), clamping is connected.
5. a kind of current transformer Polarity experiment device according to claim 1, is characterized in that described battery case is provided with draw-in groove, is provided with insulating trip in draw-in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674784 CN202939258U (en) | 2012-12-10 | 2012-12-10 | Current transformer polarity test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674784 CN202939258U (en) | 2012-12-10 | 2012-12-10 | Current transformer polarity test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939258U true CN202939258U (en) | 2013-05-15 |
Family
ID=48323489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220674784 Expired - Fee Related CN202939258U (en) | 2012-12-10 | 2012-12-10 | Current transformer polarity test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939258U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954882A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Current transformer polarity judgment instrument with lithium battery |
-
2012
- 2012-12-10 CN CN 201220674784 patent/CN202939258U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954882A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Current transformer polarity judgment instrument with lithium battery |
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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: 20130515 Termination date: 20171210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |