CN201247302Y - Apparatus for measuring polar of isonym end of current mutual inductor or transformer - Google Patents
Apparatus for measuring polar of isonym end of current mutual inductor or transformer Download PDFInfo
- Publication number
- CN201247302Y CN201247302Y CNU2008201416300U CN200820141630U CN201247302Y CN 201247302 Y CN201247302 Y CN 201247302Y CN U2008201416300 U CNU2008201416300 U CN U2008201416300U CN 200820141630 U CN200820141630 U CN 200820141630U CN 201247302 Y CN201247302 Y CN 201247302Y
- Authority
- CN
- China
- Prior art keywords
- switch
- multimeter
- connection terminal
- transformer
- measuring
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims abstract description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N hydrogen Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N lithium Chemical compound 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[Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 239000000463 materials Substances 0.000 abstract description 3
- 238000010586 diagrams Methods 0.000 description 5
- 239000011257 shell materials Substances 0.000 description 3
- 238000005516 engineering processes Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical group data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
Technical field
The utility model relates to the measuring equipment of electric system, the polarity measurement device of especially a kind of current transformer or transformer end of the same name.
Background technology
The effect of current transformer is that big electric current is become little electric current in electric system, isolates being connected the secondary circuit of relay and surveying instrument instrument and the high-pressure system of primary current, and primary current is transformed to the secondary current value of 5A or two kinds of standards of 1A.The structure of general current transformer is made up of winding, Secondary Winding, iron core and a framework of mutually insulated, housing, connection terminal etc., and its principle of work is identical substantially with transformer; And the current transformer in the electric system should carry out polarity measurement before and after handing-over and overhaul, in case when wiring that polarity is mistaken and cause the inaccurate of the malfunction in relay protection loop and measurement loop measurement data.What the method for traditional measurement polarity adopted is DC-method, both connects used for dry cell in power supply at winding of current transformer, uses multimeter to measure in secondary winding in current transformer.This method of testing is more directly perceived, measurement result is accurate, but operation more complicated, need a people to connect dry cell at primary side, people of secondary side connects multimeter, and the operator of secondary side need command the operator of primary side to carry out the break-make of dry cell wiring at interval to produce current impulse.Therefore existing polarity measurement needs two operators have good fitness just can accurately finish measurement, has promptly wasted manpower, has wasted the time again, and to measure the multimeter that polarity uses be the pointer type multimeter, and this multimeter ratio is easier to damage.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of easy to use, not fragile and save the polarity measurement device of human and material resources and the current transformer of time or transformer end of the same name.
The technical scheme that the utility model is taked is:
The polarity measurement device of a kind of current transformer or transformer end of the same name, it is characterized in that: by housing, multimeter, switch, positive connection terminal, negative connection terminal and electric battery are formed, electric battery is installed in housing, at the housing upper surface multimeter is installed, switch, positive connection terminal and negative connection terminal, one end of switch connects positive connection terminal, the other end of switch connects the positive pole of electric battery, the negative pole of electric battery connects negative connection terminal, two measuring junctions of multimeter all are connected with measuring pen, and described two measuring pen connect the two ends of current transformer or transformer secondary winding respectively.
And, two measuring junctions of described multimeter directly install and measure pen, perhaps the measuring junction with multimeter is connected to the negative connection terminal of the positive connection terminal of multimeter, multimeter that housing outer surface is provided with respectively by electric wire, end with two measuring pen is connected with the positive connection terminal of multimeter, the negative connection terminal of multimeter respectively again, and the other end of measuring pen connects the two ends of current transformer or transformer secondary winding.
And described switch is the crawl normal open switch.
And, connecting the two switches of putting of a hilted broadsword between described electric battery and the switch, the two moving contacts of putting switch of hilted broadsword connect an end of electric battery, and the two stationary contacts putting switch of hilted broadsword connect switch one end, and another stationary contact connects the other end of switch.
And described electric battery is that tweezer hydrogen element cell, lithium element cell or alkaline element cell are composed in series.
Advantage of the present utility model and good effect are:
1. this polarity measurement device is inlaid in surface of shell with multimeter, electric battery is arranged in the housing, surface of shell also is provided with switch and connection terminal, and electric battery, switch and connection terminal are all on line, directly connection terminal is connected with a winding of current transformer or transformer during use, the electric current of measuring Secondary Winding with multimeter to be to determine polarity then, and is very easy to use, can finish surveying work by an operator.
2. this polarity measurement device is inlaid in surface of shell with multimeter, makes multimeter obtain good protection, even fall also not fragilely on the ground at work, has promptly protected equipment, has also saved maintenance, the purchase cost of equipment.
3. this polarity measurement apparatus structure is simple, and used electric elements are commercially available, and is with low cost, easy to use, and saved human and material resources and time, greatly improved work efficiency.
Description of drawings
Fig. 1 is perspective view of the present utility model (broken section);
Fig. 2 is the circuit theory diagrams of the utility model embodiment 1.
Fig. 3 is the circuit theory diagrams of the utility model embodiment 2.
Fig. 4 is the circuit theory diagrams that the utility model is measured polarity chron.
Fig. 5 is the circuit theory diagrams whether the utility model sensing lead opens circuit.
Fig. 6 is that the utility model is the circuit theory diagrams of electric.
Embodiment
Below in conjunction with embodiment, the utility model is further specified, following embodiment is illustrative, is not determinate, can not limit protection domain of the present utility model with following embodiment.
Embodiment 1:
The polarity measurement device of a kind of current transformer or transformer end of the same name, as shown in Figure 1, form by multimeter 2, switch 3, positive connection terminal 6, negative connection terminal 8, housing 9 and electric battery 10, multimeter is flush-mounted in the upper surface of housing, electric battery is arranged in the housing, switch, positive connection terminal and negative connection terminal also are arranged on the housing upper surface, and switch, positive connection terminal and negative connection terminal all are arranged on the upper surface of housing in the present embodiment.As shown in Figure 2, an end of switch connects positive connection terminal, and the other end of switch connects the positive pole of electric battery, and the negative pole of electric battery connects negative connection terminal (as shown in Figure 2).Two of multimeter measuring junctions can directly be installed conventional measuring pen for the test use in this polarity measurement device, also can be as Fig. 1, measuring junction with multimeter shown in Figure 2 is connected to the positive connection terminal 5 of multimeter that housing outer surface is provided with respectively by electric wire, multimeter is born connection terminal 7, again with an end of two measuring pen respectively with the positive connection terminal of multimeter, the negative connection terminal of multimeter connects, and the other end of measuring pen connects the two ends of current transformer or transformer secondary winding, the measuring pen of different length can be installed, handled easily person's use after connecting like this in the different operating place.
Switch can adopt the crawl normal open switch to realize the break-make of circuit, in like manner uses the hilted broadsword list to put that switch or hilted broadsword are two to be put switch and also be fine.Electric battery in this device is composed in series by several batteries, concrete quantity can be set according to required voltage in the real work, be that two batteries are composed in series in the present embodiment, and cell types can be selected tweezer hydrogen element cell, lithium element cell or alkaline element cell for use.
This device can also be provided with an over cap 1 on housing, this over cap flexibly connects by hinge and housing, opens over cap during use and can carry out the wiring operation.
Embodiment 2:
Present embodiment also can also be provided with the two switches 4 (as shown in Figure 1) of putting of a hilted broadsword by upper surface outside housing, this hilted broadsword is two to be put switch and is connected (as shown in Figure 3) between electric battery and the switch, the two moving contact DK1 that put switch of hilted broadsword connect the positive pole of electric battery, the two stationary contact DK1-1 that put switch of hilted broadsword connect an end of switch, and another stationary contact DK1-2 connects the other end of switch.
Other is identical with embodiment 1.
Whether this device not only can be measured the end of the same name of current transformer first and second winding and the end of the same name of transformer first and second winding, can also open circuit or the device of power supply is provided for load as a kind of sensing lead.
Application example 1:
Measure the end of the same name of current transformer or transformer first and second winding, as shown in Figure 4
1. with two moving contact DK1 and the stationary contact DK1-1 closures of putting switch of hilted broadsword, multimeter A adjusts to a milliampere gear.
2. the positive connection terminal that is provided with on the housing is connected the L1 end of a current transformer or a winding of transformer, the L2 that negative connection terminal is connected a current transformer or a winding of transformer holds;
3. the positive connection terminal of multimeter is connected the M1 end of current transformer or transformer secondary winding, the negative connection terminal of multimeter A connects the M2 end of current transformer or transformer secondary winding;
4. if milliammeter pointer positively biased during closed crawl normal open switch K1, and milliammeter pointer negative bias when disconnecting illustrates that current transformer or transformer are connected on the L1 end on the positive connection terminal and the M1 end that is connected on the positive connection terminal of multimeter A is a same polarity (end of the same name).If the milliammeter beat of pointer is reversed polarity with above-mentioned opposite explanation L1 and M1 end.
Application example 2:
Whether sensing lead opens circuit, as shown in Figure 5
1. with two moving contact DK1 and the stationary contact DK1-1 closures of putting switch of hilted broadsword, multimeter A adjusts to the reometer gear.
2. the positive pole that the positive connection terminal that is provided with on the housing is connected load, with the positive connection terminal of negative pole connection multimeter A of load, the negative connection terminal of multimeter A connects the negative connection terminal that is provided with on the housing;
3. if the multimeter needle deflection illustrates circuit turn-on during closed crawl normal open switch K1, load is normal.If multimeter A pointer does not deflect, the load cut-off inspection that needs repairing is described.
Application example 3:
Be electric, as shown in Figure 6
1. with two moving contact DK1 and the stationary contact DK1-2 closures of putting switch of hilted broadsword;
2. the positive pole that the positive connection terminal that is provided with on the housing is connected load, the negative pole of load connect negative connection terminal.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201416300U CN201247302Y (en) | 2008-08-18 | 2008-08-18 | Apparatus for measuring polar of isonym end of current mutual inductor or transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201416300U CN201247302Y (en) | 2008-08-18 | 2008-08-18 | Apparatus for measuring polar of isonym end of current mutual inductor or transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201247302Y true CN201247302Y (en) | 2009-05-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201416300U CN201247302Y (en) | 2008-08-18 | 2008-08-18 | Apparatus for measuring polar of isonym end of current mutual inductor or transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201247302Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957420A (en) * | 2010-09-19 | 2011-01-26 | 江苏省电力公司仪征市供电公司 | Device for testing polarities of mutual inductor of switchgear |
| CN102967795A (en) * | 2012-12-11 | 2013-03-13 | 衡水供电公司 | Polarity detecting device of current mutual inductor |
| CN103063982A (en) * | 2012-12-27 | 2013-04-24 | 东莞市光华实业有限公司 | Dv/dt transformer polarity tester and testing method thereof |
| CN103364689A (en) * | 2012-03-30 | 2013-10-23 | 海洋王（东莞）照明科技有限公司 | Transformer wiring diagram dotted terminal detecting device |
| CN103472357A (en) * | 2013-08-23 | 2013-12-25 | 国家电网公司 | Polarity detecting device of current transformer |
| CN103954882A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Current transformer polarity judgment instrument with lithium battery |
| CN108872776A (en) * | 2018-05-23 | 2018-11-23 | 安徽省神虹变压器股份有限公司 | A kind of polarity detection method of transformer cartridge type winding |
| CN110286295A (en) * | 2019-05-13 | 2019-09-27 | 国家电网有限公司 | A kind of direct current feed control panel branch CT polarity test device and method |
-
2008
- 2008-08-18 CN CNU2008201416300U patent/CN201247302Y/en not_active IP Right Cessation
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957420A (en) * | 2010-09-19 | 2011-01-26 | 江苏省电力公司仪征市供电公司 | Device for testing polarities of mutual inductor of switchgear |
| CN103364689A (en) * | 2012-03-30 | 2013-10-23 | 海洋王（东莞）照明科技有限公司 | Transformer wiring diagram dotted terminal detecting device |
| CN102967795A (en) * | 2012-12-11 | 2013-03-13 | 衡水供电公司 | Polarity detecting device of current mutual inductor |
| CN103063982A (en) * | 2012-12-27 | 2013-04-24 | 东莞市光华实业有限公司 | Dv/dt transformer polarity tester and testing method thereof |
| CN103063982B (en) * | 2012-12-27 | 2015-05-20 | 东莞市光华实业有限公司 | Dv/dt transformer polarity tester and testing method thereof |
| CN103472357A (en) * | 2013-08-23 | 2013-12-25 | 国家电网公司 | Polarity detecting device of current transformer |
| CN103472357B (en) * | 2013-08-23 | 2016-03-23 | 国家电网公司 | A kind of current transformer device for detecting polarity |
| CN103954882A (en) * | 2014-05-12 | 2014-07-30 | 国家电网公司 | Current transformer polarity judgment instrument with lithium battery |
| CN108872776A (en) * | 2018-05-23 | 2018-11-23 | 安徽省神虹变压器股份有限公司 | A kind of polarity detection method of transformer cartridge type winding |
| CN110286295A (en) * | 2019-05-13 | 2019-09-27 | 国家电网有限公司 | A kind of direct current feed control panel branch CT polarity test device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130521 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Tianjin Electric Power Corp. Address before: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee before: Tianjin Electric Power Corp. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 300010 HEBEI, TIANJIN TO: 100031 XICHENG, BEIJING |
|
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN ELECTRIC POWER CORP. Effective date: 20130521 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: TIANJIN ELECTRIC POWER CORP. Effective date: 20130521 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090527 |
|
| CX01 | Expiry of patent term |