CN202351377U - Inter-turn insulation testing device of secondary winding of current transformer - Google Patents
Inter-turn insulation testing device of secondary winding of current transformer Download PDFInfo
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- CN202351377U CN202351377U CN201120405614XU CN201120405614U CN202351377U CN 202351377 U CN202351377 U CN 202351377U CN 201120405614X U CN201120405614X U CN 201120405614XU CN 201120405614 U CN201120405614 U CN 201120405614U CN 202351377 U CN202351377 U CN 202351377U
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- secondary winding
- mutual inductor
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- turn
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Abstract
The utility model discloses an inter-turn insulation testing device of a secondary winding of a current transformer and relates to a current transformer testing device. In the traditional manual verification work, this project needs repeated manual wiring, so that the automation degree is low and the efficiency is low, and the project has certain potential safety hazard since a high voltage test is involved. The inter-turn insulation testing device of secondary winding of current transformer is characterized in that the device comprises a current booster, a voltage regulator used for controlling the output of the current booster, a secondary current measuring loop of standard mutual inductor connected with the current booster to acquire the magnitude of a primary current, a secondary open circuit measuring loop of detected mutual inductor capable of automatical wiring and an inter-turn insulation tester of mutual inductor connected with the secondary current measuring loop of standard mutual inductor and the secondary open circuit measuring loop of detected mutual inductor and used for detecting the peak voltage of secondary winding. The secondary open circuit measuring loop of detected mutual inductor is capable of automatical wiring, thereby effectively improving the wiring efficiency, improving the automation degree, reducing the personal factors and enhancing the testing accuracy.
Description
Technical field
The utility model relates to a kind of current transformer test unit.
Background technology
According to the regulation of national metrological verification regulations and State Grid Corporation of China's low-voltage current mutual inductor technical requirement, the current transformer test comprises the Secondary Winding turn to turn test.In the artificial calibrating of the tradition operation, this project needs manual wiring repeatedly, and automaticity is low, efficient is low, and relates to high-potting and have certain potential safety hazard.
The utility model content
The technical matters that the utility model will solve and the technical assignment of proposition are that the prior art scheme is improved and improved, and a kind of secondary winding in current transformer turn to turn test device are provided, to reach the purpose of efficient wiring, detection.For this reason, the utility model is taked following technical scheme.
Secondary winding in current transformer turn to turn test device is characterized in that: it comprises current lifting device, is used to control the pressure regulator of current lifting device output, is connected with current lifting device with the standard mutual inductor secondary current measurement loop of gathering the primary current size, the seized mutual inductor second open circuit of ability automatic connection and measures the loop, measure loop and the loop-coupled mutual inductor turn insulation detector that is used to detect the Secondary Winding PV of seized mutual inductor second open circuit measurement with the standard mutual inductor secondary current.Seized mutual inductor second open circuit is measured the loop automatic connection, effectively improves wiring efficient, improves automaticity, reduces human factor, improves the accuracy of test.
As the further of technique scheme improved and replenish, the utility model also comprises following additional technical feature.
Seized mutual inductor second open circuit is measured the loop and is comprised a winding bindiny mechanism that is used to be connected in series winding a to current lifting device of a plurality of current transformers; Be used for winding of corresponding current mutual inductor is connected a plurality of position relaies that winding of current transformer of making series connection and current lifting device connect and compose the loop with current lifting device; Be used to connect the Secondary Winding bindiny mechanism of secondary winding in current transformer to mutual inductor turn insulation detector; Be used for a plurality of switching secondary circuit relays of short circuit secondary winding in current transformer or connection secondary winding in current transformer to mutual inductor turn insulation detector and be used to control winding bindiny mechanism one time; Secondary Winding bindiny mechanism; Position relay and the control module of switching the secondary circuit relay; Winding of described standard mutual inductor is connected with the mutual inductor turn insulation detector with current lifting device serial connection and Secondary Winding; The accurate sampling of described mutual inductor turn insulation detector bidding mutual inductor link and Secondary Winding bindiny mechanism link are to be connected secondary winding in current transformer through switching secondary circuit relay one by one.Because of a winding of DC current transformer, the wiring of Secondary Winding are accomplished through winding bindiny mechanism, a Secondary Winding bindiny mechanism automatically; Effectively improve wiring efficient; Control module control position relay and switching secondary circuit relay were accomplished the secondary winding in current transformer turn to turn test after wiring finished; Improve automaticity, reduce human factor, improve the accuracy of test.
Described switching secondary circuit relay is provided with normally closed contact and normally opened contact; The first terminal short circuit that described normally closed contact is used for secondary winding in current transformer connects, and described normally opened contact is used for being connected of secondary winding in current transformer end and mutual inductor turn insulation detector.
The Secondary Winding bindiny mechanism link of described mutual inductor turn insulation detector comprise be used for through the first link of the direct-connected Secondary Winding of Secondary Winding bindiny mechanism and Secondary Winding head end be used for through Secondary Winding bindiny mechanism and switch the last link of Secondary Winding that the secondary circuit relay is connected with the Secondary Winding end.
Test unit is provided with 12 position relaies and 12 switching secondary circuit relays, a position relay and a test station that switches the corresponding current transformer of secondary circuit relay.Make the test unit can be, and accomplish the test of each current transformer successively simultaneously to 12 position relay wiring.
Seized mutual inductor second open circuit is measured the loop and is provided with two winding bindiny mechanisms and two Secondary Winding bindiny mechanisms; The mutual inductor test station of one of them a winding bindiny mechanism and a Secondary Winding bindiny mechanism corresponding first to the 6th; Another winding bindiny mechanism and another Secondary Winding bindiny mechanism the corresponding the 7th be to dozenth mutual inductor test station, is provided with a transfer relay between two winding bindiny mechanisms and the current lifting device and with timesharing two winding bindiny mechanisms switched on.
Described Secondary Winding bindiny mechanism is provided with single two switching circuits; The two switching circuits of described list comprise single two transfer relay and single two detection relays; The normally opened contact serial connection of the switching secondary circuit relay on the odd number mutual inductor test station constitutes the odd number detection branch; The normally opened contact serial connection of switching the secondary circuit relay on the even number mutual inductor test station constitutes the even number detection branch, and odd number detection branch, even number detection branch link to each other with the mutual inductor turn insulation detector through single two detection relays; Be provided with single two transfer relay between odd number detection branch and the even number detection branch with the break-make between control odd number detection branch and the even number detection branch.
Beneficial effect: a winding of DC current transformer, the wiring of Secondary Winding are accomplished through winding bindiny mechanism, a Secondary Winding bindiny mechanism automatically; Effectively improve wiring efficient; Control module control position relay and switching secondary circuit relay were accomplished the secondary winding in current transformer turn to turn test after wiring finished; Improve automaticity, reduce human factor, improve the accuracy of test.
Description of drawings
Fig. 1 is the utility model principle assumption diagram.
Embodiment
Below in conjunction with Figure of description the technical scheme of the utility model is done further detailed description.
As shown in Figure 1; The utility model comprises the pressure regulator that is used to control output, the standard sample mutual inductor CT0 that is connected with current lifting device, the mutual inductor turn insulation detector that is used to detect the Secondary Winding PV that is connected with standard sample mutual inductor CT0, is used to be connected in series a plurality of current transformer CT1, CT2 ... Extremely a winding bindiny mechanism of CT11, winding of CT12, be used for corresponding current mutual inductor CT1, CT2 ... CT11, winding of CT12 and be connected current transformer CT1, the CT2 that makes series connection ... CT11, winding of CT12 and connect and compose a plurality of position relay T1, the T2 in loop ... T11, T12, be used for current transformer CT1, CT2 ... The Secondary Winding bindiny mechanism that CT11, CT12 Secondary Winding and mutual inductor turn insulation detector are connected, be used for short circuit current transformer CT1, CT2 ... CT11, CT12 Secondary Winding or connection current transformer CT1, CT2 ... A plurality of switching secondary circuit relay T13 of CT11, CT12 Secondary Winding to mutual inductor turn insulation detector, T14 ... T23, T24 and be used to control winding bindiny mechanism, Secondary Winding bindiny mechanism, position relay T1, T2 ... T11, T12 and switching secondary circuit relay T13, T14 ... The control module of T23, T24, described mutual inductor turn insulation detector bidding accurate sampling mutual inductor CT0 link and Secondary Winding bindiny mechanism link are to pass through to switch secondary circuit relay T13, T14 ... T23, T24 connect current transformer CT1, CT2 one by one ... CT11, CT12 Secondary Winding.Switch secondary circuit relay T13, T14 ... T23, T24 are provided with normally closed contact and normally opened contact; Described normally closed contact is used for current transformer CT1, CT2 ... The first terminal short circuit of the Secondary Winding of CT11, CT12 connects, and described normally opened contact is used for current transformer CT1, CT2 ... The Secondary Winding end of CT11, CT12 and being connected of mutual inductor turn insulation detector.The Secondary Winding bindiny mechanism link of mutual inductor turn insulation detector comprise be used for through the first link of the direct-connected Secondary Winding of Secondary Winding bindiny mechanism and Secondary Winding head end be used for through Secondary Winding bindiny mechanism and switch secondary circuit relay T13, T14 ... T23, T24 and the terminal Secondary Winding end link that is connected of Secondary Winding.
In the present embodiment; Test unit is provided with 12 position relay T1, T2 ... T11, T12 and 12 are switched secondary circuit relay T13, T14 ... T23, T24, position relay T1, T2 ... T11, T12 and one are switched secondary circuit relay T13, T14 ... T23, the corresponding current transformer CT1 of T24, CT2 ... The test station of CT11, CT12.Certainly also can be more than testing stations less than 12.
Seized mutual inductor second open circuit is measured the loop and is provided with two winding bindiny mechanisms and two Secondary Winding bindiny mechanisms; The mutual inductor test station of one of them a winding bindiny mechanism and a Secondary Winding bindiny mechanism corresponding first to the 6th; Another winding bindiny mechanism and another Secondary Winding bindiny mechanism the corresponding the 7th be to dozenth mutual inductor test station, is provided with a transfer relay between two winding bindiny mechanisms and the current lifting device and with timesharing two winding bindiny mechanisms switched on.Secondary Winding bindiny mechanism is provided with single two switching circuit; The two switching circuits of described list comprise single two transfer relay T26 and single two detection relay T27; Switching secondary circuit relay T13, T15 on the odd number mutual inductor test station ... The normally opened contact serial connection of T21, T23 constitutes the odd number detection branch; Switch secondary circuit relay T14, T16 on the even number mutual inductor test station ... The normally opened contact serial connection of T22, T24 constitutes the even number detection branch, and odd number detection branch, even number detection branch link to each other with the mutual inductor turn insulation detector through single two detection relay T27; Be provided with single two transfer relay T26 between odd number detection branch and the even number detection branch with the break-make between control odd number detection branch and the even number detection branch.
The course of work:
The utility model is the turn-to-turn insulation intensity of examination mutual inductor Secondary Winding, and seized secondary winding in current transformer open circuit is passed through rated current simultaneously and continues 1min in winding of mutual inductor.Transformer error data change before and after the turn to turn test is little.The actual current value of the winding of secondary current monitoring through the measurement standard mutual inductor, and, guarantee that a winding of seized mutual inductor continues to pass through rated primary current according to the output of the primary current value control pressure regulator that records.The utility model is applicable to the Secondary Winding turn-to-turn insulation of multiple circle formula and bus-type current transformer.
When carrying out the mutual inductor turn to turn test, 12 seized mutual inductors are divided into 2 batches, and first batch mutual inductor serial, simultaneously through specified once big electric current is waited for after second batch of mutual inductor accomplished a Secondary Winding wiring.After accomplishing turn to turn test, first batch of mutual inductor carry out next pilot project, and second batch of mutual inductor energising beginning test.The switching of first batch and second batch mutual inductor primary circuit is through a transfer relay T28 control.
When making an experiment for one batch of 6 current transformer; The position relay T6 that is positioned at the 6th test station is closed; Other position relay T1, T2, T3, T4, T5, T7, T8, T9, T10, T11, T12 are in off-state, and this moment, this batch mutual inductor serial passed through rated primary current.
When current transformer to be checked is again circle formula current transformer; For discontented a collection of current transformer; Carry out the connection of a winding and suiting of primary circuit according to the number of seized mutual inductor; For example when only having 2 current transformers to carry out turn to turn test, the position relay T2 that is positioned at the second test station is closed, and other position relay breaks off.
When current transformer to be checked is bus-type current transformer; The mode of employing copper rod punching can be a winding power supply of the current transformer of first to the 6th test station; When being less than 6 mutual inductors such as inspection such as grade; The position relay T6 that is positioned at the 6th test station is closed, and other position relay breaks off.
In the normal process of the test, have only seized secondary winding in current transformer to insert voltage measurement circuit in the same batch of mutual inductor, the Secondary Winding of other current transformer is closed.When for example surveying the mutual inductor open-circuit voltage of the first test station; Corresponding switching secondary circuit relay T13 breaks off; The transformer secondary circuit of the first test station inserts voltage measurement circuit; All the other switch secondary circuit relay T14, T15, T16, T17, T18 closure, guarantee that the mutual inductor Secondary Winding short circuit of second to the 6th test station is closed.
Can realize that through controlling single two transfer relay T26 and single two detection relay T27 the turn to turn test mode of single list mutual inductor, the two mutual inductors of single switches.When closed, the single two detection relay T27 of single two transfer relay T26 be in initial bit, when switching secondary circuit relay T13 and being in working position, first mutual inductor carries out turn to turn test, be single list mutual inductor mode this moment.When T26 breaks off, T13 is closed, T14 is closed, in initial bit and first-class folding interval time of working position, then the 1st and the 2nd mutual inductor carry out turn to turn test to T27 simultaneously according to programmed control, open-circuit voltage carries out time sharing sampling through the uniformly-spaced folding of T27.
More than secondary winding in current transformer turn to turn test device shown in Figure 1 be the specific embodiment of the utility model; The utility model substantive distinguishing features and progress have been embodied; Can be according to the use needs of reality; Under the enlightenment of the utility model, it is carried out the equivalent modifications of aspects such as shape, structure, all at the row of the protection domain of this programme.
Claims (7)
1. secondary winding in current transformer turn to turn test device is characterized in that: it comprises current lifting device, be used to control the pressure regulator of current lifting device output, is connected with current lifting device with the standard mutual inductor secondary current of gathering the primary current size measure the loop, can automatic connection seized mutual inductor second open circuit measure the loop, with standard mutual inductor secondary current measurement loop and the loop-coupled mutual inductor turn insulation detector that is used to detect the Secondary Winding PV of seized mutual inductor second open circuit measurement.
2. secondary winding in current transformer turn to turn test device according to claim 1 is characterized in that: seized mutual inductor second open circuit is measured the loop and is comprised and be used to be connected in series a plurality of current transformers (CT1, CT2 ... CT11, CT12) winding a to current lifting device a winding bindiny mechanism, be used for corresponding current mutual inductor (CT1, CT2 ... CT11, CT12) one time winding is connected current transformer (CT1, the CT2 that makes series connection with current lifting device ... CT11, CT12) winding and current lifting device connect and compose a plurality of position relaies (T1, the T2 in loop ... T11, T12), be used to connect current transformer (CT1, CT2 ... CT11, CT12) Secondary Winding to mutual inductor turn insulation detector Secondary Winding bindiny mechanism, be used for short circuit current transformer (CT1, CT2 ... CT11, CT12) Secondary Winding or connection current transformer (CT1, CT2 ... CT11, CT12) a plurality of switching secondary circuit relay (T13, the T14 of Secondary Winding to mutual inductor turn insulation detector ... T23, T24) and be used to control winding bindiny mechanism, Secondary Winding bindiny mechanism, position relay (T1, T2 ... T11, T12) and switch secondary circuit relay (T13, T14 ... T23, T24) control module; Winding of described standard mutual inductor (CT0) is connected with the mutual inductor turn insulation detector with current lifting device serial connection and Secondary Winding; Described mutual inductor turn insulation detector bidding accurate sampling mutual inductor (CT0) link and Secondary Winding bindiny mechanism link are to pass through to switch secondary circuit relay (T13, T14 ... T23, T24) connect current transformer (CT1, CT2 one by one ... CT11, CT12) Secondary Winding.
3. secondary winding in current transformer turn to turn test device according to claim 2; It is characterized in that: described switching secondary circuit relay (T13, T14 ... T23, T24) be provided with normally closed contact and normally opened contact; Described normally closed contact is used for current transformer (CT1, CT2 ... CT11, CT12) the first terminal short circuit of Secondary Winding connect, described normally opened contact is used for current transformer (CT1, CT2 ... CT11, CT12) being connected of the terminal and mutual inductor turn insulation detector of Secondary Winding.
4. secondary winding in current transformer turn to turn test device according to claim 2 is characterized in that: the Secondary Winding bindiny mechanism link of described mutual inductor turn insulation detector comprise be used for through the first link of the direct-connected Secondary Winding of Secondary Winding bindiny mechanism and Secondary Winding head end be used for through Secondary Winding bindiny mechanism and switch secondary circuit relay (T13, T14 ... T23, T24) with the last link of the terminal Secondary Winding that is connected of Secondary Winding.
5. according to the described secondary winding in current transformer turn to turn test of the arbitrary claim of claim 1-4 device; It is characterized in that: test unit is provided with 12 position relaies (T1, T2 ... T11, T12) and 12 switching secondary circuit relays (T13, T14 ... T23, T24), position relay (T1, a T2 ... T11, T12) and switching secondary circuit relay (T13, a T14 ... T23, T24) corresponding current transformer (CT1, a CT2 ... CT11, CT12) the test station.
6. secondary winding in current transformer turn to turn test device according to claim 5; It is characterized in that: seized mutual inductor second open circuit is measured the loop and is provided with two winding bindiny mechanisms and two Secondary Winding bindiny mechanisms; The mutual inductor test station of one of them a winding bindiny mechanism and a Secondary Winding bindiny mechanism corresponding first to the 6th; Another winding bindiny mechanism and another Secondary Winding bindiny mechanism the corresponding the 7th be to dozenth mutual inductor test station, is provided with a transfer relay between two winding bindiny mechanisms and the current lifting device and with timesharing two winding bindiny mechanisms switched on.
7. secondary winding in current transformer turn to turn test device according to claim 6; It is characterized in that: described Secondary Winding bindiny mechanism is provided with single two switching circuits; The two switching circuits of described list comprise single two transfer relay (T26) and single two detection relay (T27); Switching secondary circuit relay (T13, T15 on the odd number mutual inductor test station ... T21, T23) normally opened contact serial connection constitute the odd number detection branch; Switch secondary circuit relay (T14, T16 on the even number mutual inductor test station ... T22, T24) normally opened contact serial connection constitute the even number detection branch, odd number detection branch, even number detection branch link to each other with the mutual inductor turn insulation detector through single two detection relays (T27); Be provided with single two transfer relay (T26) between odd number detection branch and the even number detection branch with the break-make between control odd number detection branch and the even number detection branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120405614XU CN202351377U (en) | 2011-10-21 | 2011-10-21 | Inter-turn insulation testing device of secondary winding of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120405614XU CN202351377U (en) | 2011-10-21 | 2011-10-21 | Inter-turn insulation testing device of secondary winding of current transformer |
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| Publication Number | Publication Date |
|---|---|
| CN202351377U true CN202351377U (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120405614XU Expired - Lifetime CN202351377U (en) | 2011-10-21 | 2011-10-21 | Inter-turn insulation testing device of secondary winding of current transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301548A (en) * | 2015-10-27 | 2016-02-03 | 中国电力科学研究院 | Temperature rise characteristic automatic detection device of low-tension current transformer |
| CN106291115A (en) * | 2016-10-27 | 2017-01-04 | 哈尔滨理工大学 | Distance power cable insulation impedance on-line monitoring method |
| CN109765453A (en) * | 2019-03-29 | 2019-05-17 | 广东电网有限责任公司 | A kind of Protection secondary circuit wiring automatic tester |
| CN114720830A (en) * | 2022-06-09 | 2022-07-08 | 江苏沃尔法电气有限公司 | Insulation test device of voltage transformer for high-voltage gas-filled cabinet |
| CN114823088A (en) * | 2022-06-23 | 2022-07-29 | 国网湖北省电力有限公司营销服务中心(计量中心) | Standard transformer and using method thereof |
-
2011
- 2011-10-21 CN CN201120405614XU patent/CN202351377U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301548A (en) * | 2015-10-27 | 2016-02-03 | 中国电力科学研究院 | Temperature rise characteristic automatic detection device of low-tension current transformer |
| CN105301548B (en) * | 2015-10-27 | 2019-03-22 | 中国电力科学研究院 | A kind of low-voltage current mutual inductor temperature characteristic automatic detection device |
| CN106291115A (en) * | 2016-10-27 | 2017-01-04 | 哈尔滨理工大学 | Distance power cable insulation impedance on-line monitoring method |
| CN109765453A (en) * | 2019-03-29 | 2019-05-17 | 广东电网有限责任公司 | A kind of Protection secondary circuit wiring automatic tester |
| CN114720830A (en) * | 2022-06-09 | 2022-07-08 | 江苏沃尔法电气有限公司 | Insulation test device of voltage transformer for high-voltage gas-filled cabinet |
| CN114823088A (en) * | 2022-06-23 | 2022-07-29 | 国网湖北省电力有限公司营销服务中心(计量中心) | Standard transformer and using method thereof |
| CN114823088B (en) * | 2022-06-23 | 2022-09-23 | 国网湖北省电力有限公司营销服务中心(计量中心) | Standard transformer and using method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |