CN108931699A - DC break down voltage test device - Google Patents
DC break down voltage test device Download PDFInfo
- Publication number
- CN108931699A CN108931699A CN201810396915.7A CN201810396915A CN108931699A CN 108931699 A CN108931699 A CN 108931699A CN 201810396915 A CN201810396915 A CN 201810396915A CN 108931699 A CN108931699 A CN 108931699A
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- branch
- detection
- detection branch
- current
- break down
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to voltage-withstand tests, a kind of DC break down voltage test device is provided, including DC test circuit and PLC control centre, testing circuit includes at least one detection branch, detection branch has common end, test side and DC current transmitter, it is connected between common end and test side by least two detection branches, each detection branch is provided with the first high direct voltage contactor, at least two groups coil windings are provided on DC current transmitter, and DC current transmitters sense information is transmitted to PLC control centre.In the present invention, detection branch uses DC current transmitters sense product to be checked, and the different coil windings of at least two groups the number of turns are provided on DC current transmitter, and then achieve the purpose that realize actual current variation around the winding coil of multiple groups difference turn ratio using a current transducer, and high current when being powered, low current can be detected respectively by PLC control centre, so that detection accuracy is with multiple more corresponding than raising per number of turns all the way.
Description
Technical field
The present invention relates to voltage-withstand test more particularly to a kind of DC break down voltage test devices.
Background technique
Traditional voltage-resisting test apparatus only has a set of test sensor, it is necessary to manual operations, and be to do Insulation test
Pressure resistance is used, and cannot be tested test product work compression resistance, cannot effectively record in test process product heated current from big to small
Situation of change, in low current without valid reading.
Summary of the invention
The purpose of the present invention is to provide a kind of DC break down voltage test devices, it is intended to set for solving existing voltage-withstand test
It is standby to be difficult to test the work compression resistance of product.
The invention is realized in this way：
The embodiment of the present invention provides a kind of DC break down voltage test device, including DC test circuit and described for controlling
The PLC control centre of each switch on and off of DC test circuit, the test circuit include at least one detection branch, and each described
It is arranged in parallel between detection branch, the detection branch has common end, the test side for connecting product to be checked and is used for
The DC current transmitter for detecting product to be checked is connected between the common end and the test side by least two detection branches
Logical, each detection branch is provided with the first high direct voltage contactor, is provided on the DC current transmitter and respectively
The one-to-one at least two groups coil windings of detection branch, the coil windings are connected to the corresponding detection branch, and
The number of turns of each coil windings is different on each DC current transmitter, and the PLC control centre successively controls respectively
The on-off of the first high direct voltage contactor, and the DC current transmitters sense information is transmitted in the PLC control
The heart.
Further, the detection branch is at least two groups, and the PLC control centre, which staggers the time, connects each detection branch
Each first high direct voltage contactor.
Further, and in each detection branch, the PLC control centre is according to the number of turns of the coil windings
Ascending sequence successively controls the on-off of the corresponding first high direct voltage contactor.
Further, in being in series with the first high direct voltage breaker on each common end.
Further, the DC test circuit further includes the DC high-voltage power supply input branch that can connect DC high-voltage power supply
Road, each detection branch are electrically connected to the DC high-voltage power supply input branch.
Further, DC high-voltage power supply input branch road is provided with the second high direct voltage contactor, the PLC
Control centre controls the on-off of the second high direct voltage contactor.
Further, the second high direct voltage breaker is also in series in DC high-voltage power supply input branch road.
Further, the case where each product to be checked being monitored in real time by host computer, and can be set in advance according in host computer
Fixed detection setting value judges product to be checked, and issues warning note acousto-optic by PLC control centre.
Further, it records to form file guarantor when putting into effect by detection case of the host computer to each product to be checked
It deposits.
Further, each detection branch includes three detection branches and a pair of with each detection branch one
The number of turns of coil windings described in three groups answered, coil windings described in three groups increases along ascending sequence equal proportion.
The invention has the advantages that：
In test device of the invention, detection branch uses DC current transmitters sense product to be checked, examines in each
Branch road detection branch is surveyed by PLC control centre control selections, the first direct current that can successively control each detection branch is high
The on-off of tentaculum is crimped, so that corresponding detection branch is connected, the detection to product to be checked is realized by the detection branch,
And since the number of turns of each coil windings on DC current transmitter is different, i.e., using a current transducer around multiple groups difference the number of turns
The winding coil of ratio realizes the variation of actual current, and detects high current when work is powered, small respectively by PLC control centre
Electric current, so that detection accuracy is with multiple more corresponding than raising per number of turns all the way.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the circuit diagram of the DC test circuit of DC break down voltage test device provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention provides a kind of DC break down voltage test device, including DC test circuit and PLC
Control centre, wherein DC test circuit is detection main body, and the pressure resistance to product 3 to be checked may be implemented by DC test circuit
Test, and PLC control centre is then the control main body of device, can control and respectively switch on-off in DC test circuit.Tool
Body, test circuit includes at least one detection branch 1, and each detection branch 1 may be incorporated for realizing to be checked to wherein one
The voltage-withstand test of product 3, usually in order to improve the detection efficiency of device, detection branch 1 can have a plurality of, and each item detects
It is in parallel between branch 1；Continue to refine detection branch 1, with common end 11, test side 12 and DC current transmitter
13, wherein common end 11 connects DC power supply, and product 3 to be checked is connected to test side 12, and test side 12 passes through with common end 11
DC current transmitter 13 connects, and achievees the purpose that detection product 3 to be checked by DC current transmitter 13, specifically, public
It is connected between end 11 and test side 12 by detecting branch 14 altogether, detection branch 14 is at least two, and each detection branch 14 is
It is provided with the first high direct voltage contactor 141, and then controls corresponding detection branch 14 by the first high direct voltage contactor 141
On-off, be provided on two DC current transmitters 13 with the one-to-one at least two groups coil windings 131 of each detection branch 14,
Coil windings 131 are connected to corresponding detection branch 14, to this when the first high direct voltage contactor 141 of detection branch 14 is connected to
Afterwards, the common end 11 of detection branch 1 passes through the detection branch 14 and is connected to test side 12 through corresponding coil windings 131, instead
After the first high direct voltage contactor 141 disconnects, corresponding 131 no power of coil windings of detection branch 14, for each the
One direct current high voltage connector 141 is connected to PLC control centre, controls each first high direct voltage by the PLC control centre and contacts
The on-off of device 141, the number of turns of each coil windings 131 is different on each DC current transmitter 13, in general each coil windings
131 the number of turns can require to increase according to certain so that the detection accuracy and detection range of each detection branch 14 are not
Identical, 13 detection information of DC current transmitter is transmitted to PLC control centre, and then can judge the inspection of the detection branch 14
Survey the voltage-withstand test of precision and the whether suitable product 3 to be checked of detection range.In the present invention, when product 3 to be checked is connected to test side
When 12, PLC control centre successively controls the on-off of each first high direct voltage contactor 141 of corresponding detection branch 1, and direct current
Flow transmitter 13 will test information and be transmitted to PLC control centre, due to being provided at least two groups line on DC current transmitter 13
Winding 131 is enclosed, then same electric current will generate unlike signal in DC current transmitter 13, and PLC control centre can be according to connection line
Road turn ratio will amplify the signals revivification of different multiples, improve transmitters sense low current precision, i.e. each detection branch 1 is adopted
It is controlled respectively with 13 multiplexing technique of DC current transmitter, and with the variation of actual current by PLC control centre
High current, low current when detection work is powered, so that detection accuracy is improved with the turn ratio per coil windings 131 all the way
Corresponding multiple, and then real-time judge can be made to product 3 to be checked.In general, which should also be connected with a host computer, lead to
The detection case that the host computer monitors each product to be checked 3 in real time is crossed, and can be set according to detection preset in host computer
Definite value judges product 3 to be checked, and will test result and feed back to PLC control centre, and when detecting unqualified, PLC control
Center processed can then issue warning note acousto-optic according to testing result, and then can remind the resistance to of staff's product 3 to be checked
Press test failure.In addition host computer can also make real-time record to the detection case of each product 3 to be checked, and with file shape
Formula saves, so that the subsequent voltage-withstand test result to product 3 to be checked be facilitated to count, achievees the purpose that data demand target.
Preferably, detection branch 1 is at least two groups, then device can detect at least two groups product 3 to be checked each time, and
When actually detected, PLC control centre, which staggers the time, connects each first high direct voltage contactor 141 of each detection branch 1.Specifically, may be used
Each product 3 to be checked to be first connected to the test side 12 of each detection branch 1, after device starting, PLC control centre is according to one
Fixed sequentially in turn switch on each detection branch 1, i.e., each detection branch 1 will not be also turned on detection, and when 1 electricity of detection branch connected
After stream detected value drops to safety value, next detection branch 1 is connected.It can be detected in this way to avoid product 3 how to be checked
When dash current superposition, damage equipment, increase DC power supply load.For this detection of staggering the time, the public affairs of each detection branch 1
One first high direct voltage breaker 111 should be in series on end 11 altogether, each first high direct voltage breaker 111 is connected to PLC control
Center processed, is controlled by it the on-off of corresponding detection branch 1, and then can be realized the detection of staggering the time of each detection branch 1, certainly this
One direct current high-voltage circuitbreaker 111 can also play a protective role, when the electric current of corresponding detection branch 1 is excessive, from dynamic circuit breaker
It opens.In a preferred approach, each detection branch 1 have three detection branches 14 and with each detection branch 14 one-to-one three
The number of turns of group coil windings 131, three groups of coil windings 131 increases along ascending sequence equal proportion.I.e. in the present invention, often
One detection branch 1 is divided into high, normal, basic three detections branch 14, corresponding three detection accuracy and detection range.Or each detection branch
Road 1 has two detection branches 14 and two groups of coil windings 131, then corresponds to detection branch 1 and be divided into two detection branches 14 of height.
Continue to optimize above-described embodiment, in each detection branch 1, PLC control centre is according to the number of turns of coil windings 131
Ascending sequence successively controls corresponding first high direct voltage contactor, 141 on-off.First closing coil in each detection branch 1
Least one group of the turn ratio of winding 131, the small detection branch 14 of the connection turn ratio big according to current detection signal, signal is small
The big detection branch 14 of connection turn ratio, according to the different grouping connected by signal make different digital transformation be input to it is upper
Machine, and judgement is saved on host computer.
Further, DC test circuit further includes the DC high-voltage power supply input branch 2 that can connect DC high-voltage power supply,
Each detection branch 1 is electrically connected to DC high-voltage power supply input branch 2.In the present embodiment, DC high-voltage power supply input branch 2 is
Total input of each detection branch 1, DC current are respectively connected to each detection branch 1 by DC high-voltage power supply input branch 2, thus table
Bright device need to only have an input interface, and structure is simple, easy to operate.In addition, claimed device uses in the present invention
DC power supply, and each electric elements therein are direct current dedicated devices, compared to traditional AC power source, not only safety compared with
Height, and can directly reflect DC operation situation.
Optimize above-described embodiment, is provided with the second high direct voltage contactor 21 on DC high-voltage power supply input branch 2, and
PLC control centre controls the on-off of the second high direct voltage contactor 21.Second high direct voltage contactor 21 is DC test electricity
The master switch on road detects preceding second high direct voltage contactor 21 and disconnects, when needing to detect, PLC control centre line traffic control second
High direct voltage contactor 21 is closed, and is then controlled the first high direct voltage breaker 111 in a wherein detection branch 1 and is closed.It is excellent
Selection of land is also in series with the second high direct voltage breaker 22, the second high direct voltage breaker on DC high-voltage power supply input branch 2
22 be the protective switch of DC test circuit, and when current is excessive, the second high direct voltage breaker 22 disconnects automatically, and then can
Play the role of protection product 3 to be checked and device.In general, device should also include safety guard, and DC test circuit is located at
In the safety guard, when safety guard is not turned off, the second high direct voltage contactor 21 is disconnected.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of DC break down voltage test device, including DC test circuit and respectively switched for controlling the DC test circuit
The PLC control centre of on-off, it is characterised in that：The test circuit includes at least one detection branch, and each detection branch
Be arranged in parallel between road, the detection branch have common end, the test side for connecting product to be checked and for detect to
The DC current transmitter for examining product, is connected between the common end and the test side by least two detection branches, often
The one detection branch is provided with the first high direct voltage contactor, is provided on the DC current transmitter and each inspection
The one-to-one at least two groups coil windings of branch are surveyed, the coil windings are connected to the corresponding detection branch, and each
The number of turns of each coil windings is different on the DC current transmitter, and the PLC control centre successively controls each described the
The on-off of one direct current high voltage connector, and the DC current transmitters sense information is transmitted to the PLC control centre.
2. DC break down voltage test device as described in claim 1, it is characterised in that：The detection branch is at least two groups, institute
It states PLC control centre and staggers the time and connect each first high direct voltage contactor of each detection branch.
3. DC break down voltage test device as described in claim 1, it is characterised in that：And in each detection branch, institute
It states PLC control centre and the corresponding first direct current height is successively controlled according to the ascending sequence of the number of turns of the coil windings
Crimp the on-off of tentaculum.
4. DC break down voltage test device as described in claim 1, it is characterised in that：In being in series on each common end
One direct current high-voltage circuitbreaker.
5. DC break down voltage test device as described in claim 1, it is characterised in that：The DC test circuit further includes that can connect
The DC high-voltage power supply of logical DC high-voltage power supply inputs branch, and each detection branch is electrically connected to the DC high-voltage power supply
Input branch.
6. DC break down voltage test device as claimed in claim 5, it is characterised in that：Branch is inputted in the DC high-voltage power supply
On be provided with the second high direct voltage contactor, the PLC control centre controls the on-off of the second high direct voltage contactor.
7. DC break down voltage test device as claimed in claim 5, it is characterised in that：Branch is inputted in the DC high-voltage power supply
On be also in series with the second high direct voltage breaker.
8. DC break down voltage test device as described in claim 1, it is characterised in that：It is monitored in real time by host computer each to be checked
The case where product, and product to be checked can be judged according to detection setting value preset in host computer, and controlled by PLC
Center processed issues warning note acousto-optic.
9. DC break down voltage test device as claimed in claim 8, it is characterised in that：By the host computer to each production to be checked
It records to form file preservation when the detection case of product is put into effect.
10. DC break down voltage test device as described in claim 1, it is characterised in that：Each detection branch includes three
Item detect branch and with coil windings described in each one-to-one three groups of detection branch, the circle of coil windings described in three groups
Number increases along ascending sequence equal proportion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810396915.7A CN108931699A (en) | 2018-04-28 | 2018-04-28 | DC break down voltage test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810396915.7A CN108931699A (en) | 2018-04-28 | 2018-04-28 | DC break down voltage test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108931699A true CN108931699A (en) | 2018-12-04 |
Family
ID=64448438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810396915.7A Pending CN108931699A (en) | 2018-04-28 | 2018-04-28 | DC break down voltage test device |
Country Status (1)
| Country | Link |
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| CN (1) | CN108931699A (en) |
Cited By (2)
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| CN109920687A (en) * | 2019-03-25 | 2019-06-21 | 威马智慧出行科技（上海）有限公司 | A kind of switching device of high-voltage electricity and test device comprising it |
| CN114200271A (en) * | 2021-12-17 | 2022-03-18 | 中国十七冶集团有限公司 | Voltage withstanding method for ports of high-voltage cabinet circuit breakers installed in rows |
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| CN114200271A (en) * | 2021-12-17 | 2022-03-18 | 中国十七冶集团有限公司 | Voltage withstanding method for ports of high-voltage cabinet circuit breakers installed in rows |
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Application publication date: 20181204 |