CN208140872U - DC break down voltage tests circuit - Google Patents
DC break down voltage tests circuit Download PDFInfo
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- CN208140872U CN208140872U CN201820639730.XU CN201820639730U CN208140872U CN 208140872 U CN208140872 U CN 208140872U CN 201820639730 U CN201820639730 U CN 201820639730U CN 208140872 U CN208140872 U CN 208140872U
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Abstract
The utility model relates to voltage-withstand tests, a kind of DC break down voltage test circuit is provided, including detection branch, detection branch has common end, test side and the DC current transmitter for detecting product to be checked, 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, be provided on DC current transmitter with each one-to-one at least two groups coil windings of detection branch, and the number of turns of each coil windings is different on each DC current transmitter.In the utility model, 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 energization, low current can be detected respectively, so that detection accuracy is with multiple more corresponding than raising per number of turns all the way.
Description
Technical field
The utility model relates to voltage-withstand tests more particularly to a kind of DC break down voltage to test circuit.
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.
Utility model content
The purpose of this utility model is to provide a kind of DC break down voltages to test circuit, it is intended to survey for solving existing pressure resistance
Examination equipment is difficult to test the work compression resistance of product.
The utility model is realized in this way：
The utility model embodiment provides a kind of DC break down voltage test circuit, including detection branch, the detection branch tool
There are common end, the test side for connecting product to be checked and the DC current transmitter for detecting product to be checked, the public affairs
End is connected to between the test side by least two detection branches altogether, and each detection branch is provided with the first direct current
High voltage connector, be provided on the DC current transmitter with each one-to-one at least two groups coil of detection branch around
Group, the coil windings are connected to the corresponding detection branch, and each coil on each DC current transmitter
The number of turns of winding is different.
Further, the detection branch is at least two groups.
Further, in being in series with the first high direct voltage breaker on each common end.
Further, DC break down voltage test circuit further include can connect DC high-voltage power supply DC high-voltage power supply it is defeated
Enter branch, each detection branch is 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.
Further, the second high direct voltage breaker is also in series in DC high-voltage power supply input branch road.
Further, each detection branch includes two detection branches and a pair of with each detection branch one
Coil windings described in two groups answered.
The utility model has the advantages that：
In the test circuit of the utility model, detection branch uses DC current transmitters sense product to be checked, each to detect
It is real to pass through the detection branch so that corresponding detection branch is connected for first high direct voltage contactor of branch successively on-off
Now to the detection of product to be checked, and since the number of turns of each coil windings on DC current transmitter is different, that is, use an electric current
Transmitter realizes the variation of actual current around the winding coil of multiple groups difference turn ratio, can detect respectively big when work is powered
Electric current, low 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 illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the circuit diagram that DC break down voltage provided by the embodiment of the utility model tests circuit.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
All other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, the utility model embodiment provides a kind of DC break down voltage test circuit, is mainly applied to a direct current
In pressure resistant testing device, DC break down voltage test circuit PLC control centre is used cooperatively in the apparatus, and wherein DC break down voltage is tested
Circuit is detection main body, and testing circuit by DC break down voltage may be implemented the voltage-withstand test to product 3 to be checked, and in PLC control
The heart is then the control main body of device, can control and respectively switch on-off in DC break down voltage test circuit.Specifically, test circuit
Including at least one detection branch 1, each detection branch 1 may be incorporated for realizing and survey to the pressure resistance of wherein one product 3 to be checked
Examination, usually in order to improve the detection efficiency of device, detection branch 1 can have it is a plurality of, and for simultaneously between each detection branch 1
Connection；Continue to refine detection branch 1, with common end 11, test side 12 and DC current transmitter 13, wherein common end 11
DC power supply is connected, product 3 to be checked is connected to test side 12, and test side 12 and common end 11 pass through DC current transmitter 13
Connection, and detection product 3 to be checked, specifically, common end 11 and test side 12 are achieved the purpose that by DC current transmitter 13
Between be connected to by detection branch 14, detection branch 14 be at least two, and it is high that each detection branch 14 is provided with the first direct current
Tentaculum 141 is crimped, and then controls the on-off of corresponding detection branch 14, two direct currents by the first high direct voltage contactor 141
It is provided on flow transmitter 13 and is connected to the one-to-one at least two groups coil windings 131 of each detection branch 14, coil windings 131
Corresponding detection branch 14, to this after the first high direct voltage contactor 141 for detecting branch 14 is connected to, the public affairs of detection branch 1
End 11 passes through the detection branch 14 and is connected to test side 12 through corresponding coil windings 131 altogether, otherwise when the first high direct voltage
After contactor 141 disconnects, corresponding 131 no power of coil windings of detection branch 14, for each first high direct voltage contactor
141 are connected to PLC control centre, and the on-off of each first high direct voltage contactor 141 is controlled by the PLC control centre, each
The number of turns of each coil windings 131 is different on DC current transmitter 13, and 131 the number of turns of in general each coil windings can be according to
It is certain to require to increase, so that the detection accuracy of each detection branch 14 is all different with detection range, DC current pick-up
13 detection information of device is transmitted to PLC control centre, and then can judge the detection accuracy and detection range of the detection branch 14
The whether properly voltage-withstand test of product 3 to be checked.In the utility model, when product 3 to be checked is connected to test side 12, PLC control
Center successively controls the on-off of each first high direct voltage contactor 141 of corresponding detection branch 1, and DC current transmitter 13 will
Detection information is transmitted to PLC control centre, due to being provided at least two groups coil windings 131 on DC current transmitter 13, then
Same electric current will generate unlike signal in DC current transmitter 13, and PLC control centre can will put according to route turn ratio is connected
The signals revivification of different multiple improves transmitters sense low current precision, i.e. each detection branch 1 uses a direct current
13 multiplexing technique of flow transmitter, and with the variation of actual current detection work is controlled by PLC control centre respectively and be powered
When high current, low current so that detection accuracy improves corresponding multiple with the turn ratio per coil windings 131 all the way, into
And real-time judge can be made to product 3 to be checked.In general, which should also be connected with a host computer, pass through the host computer
Monitor the detection case of each product to be checked 3 in real time, and can be according to detection setting value preset in host computer to be checked
Product 3 judges, and will test result and feed back to PLC control centre, and when detecting unqualified, PLC control centre then can
It is enough to issue warning note acousto-optic according to testing result, and then the voltage-withstand test of staff's product 3 to be checked can be reminded not conform to
Lattice.In addition host computer can also make real-time record to the detection case of each product 3 to be checked, and be saved with document form, from
And the subsequent voltage-withstand test result to product 3 to be checked is facilitated to count, achieve 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,
Then multiplying power can be 10 between two detection branches 14 at this time.
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 break down voltage test circuit further includes the DC high-voltage power supply input branch that can connect DC high-voltage power supply
Road 2, each detection branch 1 are electrically connected to DC high-voltage power supply input branch 2.In the present embodiment, DC high-voltage power supply input branch
Road 2 is total input of each detection branch 1, and DC current is respectively connected to each detection branch 1 by DC high-voltage power supply input branch 2,
An input interface need to be had by being indicated above device only, and structure is simple, easy to operate.In addition, being claimed in the utility model
Device use DC power supply, and each electric elements therein are direct current dedicated devices, compared to traditional AC power source, not only
Safety is higher, 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 break down voltage survey
The master switch of circuit is tried, preceding second high direct voltage contactor 21 is detected 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 closes.Preferably, the second high direct voltage breaker 22, the second high direct voltage are also in series on DC high-voltage power supply input branch 2
Breaker 22 is the protective switch that DC break down voltage tests circuit, and when current is excessive, the second high direct voltage breaker 22 is from dynamic circuit breaker
It opens, and then protection product 3 to be checked and device can be played the role of.In general, device should also include safety guard, and direct current is resistance to
Pressure test circuit is located in the safety guard, and when safety guard is not turned off, the second high direct voltage contactor 21 is disconnected.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (7)
1. a kind of DC break down voltage tests circuit, it is characterised in that：Including detection branch, the detection branch has common end, uses
In the test side for connecting product to be checked and DC current transmitter for detecting product to be checked, the common end and the inspection
It surveys by least two detection branch connections between end, each detection branch is provided with the first high direct voltage contactor,
It is provided on the DC current transmitter and each one-to-one at least two groups coil windings of detection branch, the coil
Winding is connected to the corresponding detection branch, and on each DC current transmitter each coil windings the number of turns not
Together.
2. DC break down voltage as described in claim 1 tests circuit, it is characterised in that：The detection branch is at least two groups.
3. DC break down voltage as claimed in claim 2 tests circuit, it is characterised in that：In being in series on each common end
One direct current high-voltage circuitbreaker.
4. DC break down voltage as described in claim 1 tests circuit, it is characterised in that：The DC break down voltage tests circuit
The DC high-voltage power supply input branch of DC high-voltage power supply can be connected, each detection branch is electrically connected to the high direct voltage
Power input branch.
5. DC break down voltage as claimed in claim 4 tests circuit, 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.
6. DC break down voltage as claimed in claim 4 tests circuit, 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.
7. DC break down voltage as described in claim 1 tests circuit, it is characterised in that：Each detection branch includes two
Detect branch and with coil windings described in each one-to-one two groups of detection branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820639730.XU CN208140872U (en) | 2018-04-28 | 2018-04-28 | DC break down voltage tests circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820639730.XU CN208140872U (en) | 2018-04-28 | 2018-04-28 | DC break down voltage tests circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208140872U true CN208140872U (en) | 2018-11-23 |
Family
ID=64311747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820639730.XU Active CN208140872U (en) | 2018-04-28 | 2018-04-28 | DC break down voltage tests circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208140872U (en) |
-
2018
- 2018-04-28 CN CN201820639730.XU patent/CN208140872U/en active Active
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