CN202471904U - AC voltage-proof tester - Google Patents
AC voltage-proof tester Download PDFInfo
- Publication number
- CN202471904U CN202471904U CN 201120438394 CN201120438394U CN202471904U CN 202471904 U CN202471904 U CN 202471904U CN 201120438394 CN201120438394 CN 201120438394 CN 201120438394 U CN201120438394 U CN 201120438394U CN 202471904 U CN202471904 U CN 202471904U
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- transformer
- pressure regulation
- igbt module
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Abstract
An AC (Alternating Current) voltage-proof tester comprises a voltage-regulating insulated gate bipolar transistor module, a step up transformer, a programmable logic controller (PLC), and a current transformer; wherein, a power input end of the voltage-regulating insulated gate bipolar transistor module receives a voltage from an AC power grid, a power output end of the voltage-regulating insulated gate bipolar transistor module is connected to the step up transformer, a control end of the voltage-regulating insulated gate bipolar transistor module is connected to the PLC; wherein, the current transformer is connected in series with one of the power input end of the voltage-regulating insulated gate bipolar transistor module, the power output end of the voltage-regulating insulated gate bipolar transistor module, and a power output end of the step up transformer, in order to detect a current value; and the current transformer sends the detected current value to the PLC. The AC voltage-proof tester of the utility model solves the problems of unsafe operation and low output precision in the prior art, thereby ensuring safety of an operator, and accurately outputting an expected voltage.
Description
Technical field
The utility model relates to the voltage-withstand test field.More particularly, the utility model relates to a kind of ac voltage withstanding tester.
Background technology
Electrical equipment in working order in, not only to bear specified WV, also to bear the superpotential that is higher than rated operational voltage of the short time that occurs in the operational process.Under these superpotential effects, the inner structure of insulating material may change.When having served as voltage strength and reaching certain certain value, will make the insulation breakdown of material, electrical equipment can not normally move, and the danger that may get an electric shock of operator.For this reason, need carry out voltage-withstand test to various electrical equipments.
The ac voltage withstanding tester is mainly used in the insulating material that detects electrical equipment and can bear the ac voltage withstanding ability.When voltage-withstand test, the ac voltage withstanding tester is added in a voltage that is higher than operate as normal on the product and tests, and this voltage must continue one section official hour.If a spare part is in official hour, its leakage current also remains on the scope interior (that is, being no more than ac voltage withstanding measuring current threshold value) of regulation, just can confirm that this spare part turns round under normal condition, meets safety standard.
Fig. 1 illustrates the structural representation of the AC voltage withstand test appearance of prior art.
As shown in Figure 1, the AC voltage withstand test appearance of prior art comprises: low-voltage circuit breaker QF, A.C. contactor KM, overcurrent relay LJ, variable autotransformer TB, step-up transformer SB, test stop button SS, test start button SF.
Low-voltage circuit breaker QF is connected to the live wire L and the zero line N of electric main.Variable autotransformer TB is made up of a winding (input AC civil power 220V fixed voltage) and Secondary Winding (output is artificial adjustable exchange 0～250V voltage).Step-up transformer SB is made up of with the Secondary Winding that is output as rated voltage 50 kV (or 100 kV) a winding that is input as rated voltage 200V.
AC voltage withstand test appearance according to prior art; When needs are tested; Start A.C. contactor KM through test start button SF and carry out chattering type and connect and start the AC voltage withstand test appearance, the handle through artificial rotation variable autotransformer TB carries out the chattering type voltage-regulation.In test process, LJ carries out overcurrent protection through the chattering type overcurrent relay.When closing the AC voltage withstand test appearance, SS carries out the outage of chattering type through the test stop button.
Therefore, needs operator when the operation carries out the manual operation of contact according to the AC voltage withstand test appearance of prior art, has certain potential safety hazard.In addition, owing to come regulation voltage through the handle of operator's manual operation variable autotransformer TB, therefore, its rate of rise of the output voltage of test is inhomogeneous and error is bigger, and test result is had very big influence.
The utility model content
The purpose of the utility model is to provide a kind of AC voltage withstand test appearance, and it can protect operator's safety effectively, and can export the test voltage that needs exactly.
To achieve these goals; A kind of AC voltage withstand test appearance is provided; It is characterized in that comprising: pressure regulation IGBT module, step-up transformer, programmable logic controller (PLC), current transformer; Wherein, the power input end of pressure regulation IGBT module receives voltage from AC network, and the power take-off of pressure regulation IGBT module is connected to step-up transformer; The control end of pressure regulation IGBT module is connected to programmable logic controller (PLC); Wherein, current transformer is connected with one of the power input end of pressure regulation IGBT module, the power take-off of pressure regulation IGBT module, power take-off of step-up transformer to detect current value, and current transformer sends to programmable logic controller (PLC) with the current value that detects.
Alternatively, said ac voltage withstanding tester also comprises low-voltage circuit breaker, and low-voltage circuit breaker is connected with the power input end of pressure regulation IGBT module.
Alternatively, said ac voltage withstanding tester also comprises demonstration and input block, and demonstration and input block receive control signal and control signal is sent to programmable logic controller (PLC) from the operator.
Alternatively, show and input block receives the current value that is detected by current transformer and shows from programmable logic controller (PLC).
Alternatively, said control signal is the parameter that is used to describe the output voltage of pressure regulation IGBT module and the relation curve between the time.
Alternatively, programmable logic controller (PLC) is based on the output voltage of said control signal control pressure regulation IGBT module.
Alternatively, when said current value during greater than predetermined threshold, PLC controls pressure regulation IGBT module output no-voltage, wherein, said predetermined threshold is greater than ac voltage withstanding measuring current threshold value.
Alternatively, programmable logic controller (PLC) is based on the output voltage of preset control signal control pressure regulation IGBT module.
According to the AC voltage withstand test appearance of the utility model, carry out pressure regulation through using pressure regulation IGBT module, thereby can avoid the operator to carry out the pressure regulation operation of contact, the operator's of assurance safety, and can at the uniform velocity accurately export the voltage of expectation.In addition, the AC voltage withstand test appearance according to the utility model also can prevent in test process because the short circuit of measured object or the infringement to the AC voltage withstand test appearance that overcurrent causes.
Will be in ensuing description part set forth the utility model other aspect and/or advantage, some will be clearly through describing, and perhaps can pass through the enforcement of the utility model and learn.
Description of drawings
Through the detailed description of carrying out below in conjunction with accompanying drawing, above-mentioned and other purpose, characteristics and the advantage of the utility model will become apparent, wherein:
Fig. 1 is the synoptic diagram of structure that the AC voltage withstand test appearance of prior art is shown;
Fig. 2 is the synoptic diagram that illustrates according to the structure of the AC voltage withstand test appearance of the utility model.
Embodiment
Below, the exemplary embodiment of the utility model will be described with reference to accompanying drawing more fully, exemplary embodiment is shown in the drawings.Yet, can be with many different form exemplifying embodiment property embodiment, and should not be construed as limited to exemplary embodiment in this elaboration.On the contrary, thus provide these embodiment disclosure will be thoroughly with complete, and will be fully the scope of exemplary embodiment be conveyed to those skilled in the art.
Fig. 2 illustrates the structural representation according to the AC voltage withstand test appearance of the utility model.
As shown in Figure 2, comprise according to the ac voltage withstanding tester of the utility model: pressure regulation IGBT module (IGBT) 201, step-up transformer 202, programmable logic controller (PLC) (PLC) 203, current transformer 204, low-voltage circuit breaker 205, demonstration and input block 206.
Pressure regulation IGBT module 201 is connected to AC network (for example, the utility grid of 220V) via low-voltage circuit breaker 205, and the voltage to AC network under the control of PLC 203 is regulated (AC-AC conversion), and the voltage after will regulating offers step-up transformer 202.The voltage of 202 couples of pressure regulation IGBT of step-up transformer module, 201 outputs boosts, and the voltage after will boosting is applied to by the examination thing.
Specifically; The power input end of pressure regulation IGBT module 201 is connected to AC network to receive alternating voltage, and the power take-off of pressure regulation IGBT module 201 is connected to the power input end of step-up transformer 202 with the alternating voltage after to step-up transformer 202 adjusting being provided.Simultaneously, the control end of pressure regulation IGBT module 201 is connected to PLC 203, to accept the control of PLC 203.Voltage after the power take-off of step-up transformer 202 will boost is applied to by the examination thing.
Demonstration and input block 206 are used for controlled variable is input to PLC 203.For example, controlled variable can be the parameter that is used to describe the output voltage and the relation curve between the time of pressure regulation IGBT module 201.Like this, PLC 203 controls the output voltage of pressure regulation IGBT module 201 according to this relation curve, thus the output voltage curve of output expectation.The voltage of pressure regulation IGBT module 201 outputs can be exported the voltage-withstand test voltage curve that is used to detect measured object after step-up transformer 202 boosts.In other words, this relation curve obtains the test voltage curve after multiply by the step-up ratio of step-up transformer 202.
Demonstration and input block 206 can show the controlled variable of input.In addition, demonstration and input block 206 also can show the current value that current transformer 204 detects.
Alternatively, said controlled variable is preset among the PLC 203, and need not import through demonstration and input block 206.
In whole test process,, the electric current that current transformer 204 detects (for example, 1A), do not show that then measured object has passed through the ac voltage withstanding test if surpassing ac voltage withstanding measuring current threshold value; Otherwise, show that then measured object is not through the ac voltage withstanding test.At this moment, PLC 203 may command show and input block 206 these results of demonstration.In addition, PLC 203 also can report this result through other output unit (for example, alarm lamp, loudspeaker etc.).
In addition, when PLC 203 confirmed that said electric currents exceed the predetermined threshold greater than said voltage-withstand test threshold value, control pressure regulation IGBT module 201 output no-voltages were to prevent ac voltage withstanding tester overcurrent or short circuit.
An example of carrying out the ac voltage withstanding test is shown below.
Suppose: the step-up ratio of step-up transformer 202 is 250, is carrying out ac voltage withstanding when test, and the ac voltage withstanding value is 30 kV, and the duration is 1 minute, is 5 kV/s from the rate of rise of 0V to 30 kV.
At this moment, to the requirement of the output voltage of pressure regulation IGBT module 201 be: output voltage is 120V, and the duration is 1 minute, is 20V/s from the rate of rise of 0V to 120V.Like this, PLC 203 can control pressure regulation IGBT module 201 according to the requirement of above-mentioned output voltage to pressure regulation IGBT module 201.
According to the AC voltage withstand test appearance of the utility model, carry out pressure regulation through using pressure regulation IGBT module, thereby can avoid the operator to carry out the pressure regulation operation of contact, the operator's of assurance safety, and can accurately export the voltage of expectation.In addition, the AC voltage withstand test appearance according to the utility model also can prevent in test process because the short circuit of measured object or the infringement to the AC voltage withstand test appearance that overcurrent causes.
Although specifically shown and described the utility model with reference to its exemplary embodiment; But it should be appreciated by those skilled in the art; Under the situation of the spirit of the utility model that does not break away from claim and limited and scope, can carry out the various changes on form and the details to it.
Claims (5)
1. ac voltage withstanding tester is characterized in that comprising: pressure regulation IGBT module, step-up transformer, programmable logic controller (PLC), current transformer,
Wherein, The power input end of pressure regulation IGBT module receives voltage from AC network; The power take-off of pressure regulation IGBT module is connected to step-up transformer, and the control end of pressure regulation IGBT module is connected to programmable logic controller (PLC)
Wherein, Current transformer is connected with one of the power input end of pressure regulation IGBT module, the power take-off of pressure regulation IGBT module, power take-off of step-up transformer to detect current value, and current transformer sends to programmable logic controller (PLC) with the current value that detects.
2. ac voltage withstanding tester according to claim 1 is characterized in that also comprising low-voltage circuit breaker, and low-voltage circuit breaker is connected with the power input end of pressure regulation IGBT module.
3. ac voltage withstanding tester according to claim 1 is characterized in that also comprising showing and input block that demonstration and input block receive control signal and control signal is sent to programmable logic controller (PLC) from the operator.
4. ac voltage withstanding tester according to claim 3 is characterized in that, shows and input block receives the current value that is detected by current transformer and shows from programmable logic controller (PLC).
5. ac voltage withstanding tester according to claim 1; It is characterized in that also comprising and show and input block; Demonstration and input block receive as the parameter control signal that is used to describe the output voltage of pressure regulation IGBT module and the relation curve between the time from the operator, and control signal is sent to programmable logic controller (PLC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120438394 CN202471904U (en) | 2011-11-08 | 2011-11-08 | AC voltage-proof tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120438394 CN202471904U (en) | 2011-11-08 | 2011-11-08 | AC voltage-proof tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471904U true CN202471904U (en) | 2012-10-03 |
Family
ID=46920056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120438394 Expired - Fee Related CN202471904U (en) | 2011-11-08 | 2011-11-08 | AC voltage-proof tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202471904U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393499A (en) * | 2011-11-08 | 2012-03-28 | 攀钢集团冶金工程技术有限公司 | AC withstand voltage tester |
| CN103412214A (en) * | 2013-07-25 | 2013-11-27 | 浙江方圆电气设备检测有限公司 | Testing device of half-wave short-time withstand current |
-
2011
- 2011-11-08 CN CN 201120438394 patent/CN202471904U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393499A (en) * | 2011-11-08 | 2012-03-28 | 攀钢集团冶金工程技术有限公司 | AC withstand voltage tester |
| CN103412214A (en) * | 2013-07-25 | 2013-11-27 | 浙江方圆电气设备检测有限公司 | Testing device of half-wave short-time withstand current |
| CN103412214B (en) * | 2013-07-25 | 2016-05-11 | 浙江方圆电气设备检测有限公司 | A kind of experimental rig of half-wave KA Rms |
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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: 20121003 Termination date: 20161108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |