CN202693639U - Impedance continuous-adjusting device for low-voltage large-current temperature-rise test - Google Patents
Impedance continuous-adjusting device for low-voltage large-current temperature-rise test Download PDFInfo
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- CN202693639U CN202693639U CN 201220243952 CN201220243952U CN202693639U CN 202693639 U CN202693639 U CN 202693639U CN 201220243952 CN201220243952 CN 201220243952 CN 201220243952 U CN201220243952 U CN 201220243952U CN 202693639 U CN202693639 U CN 202693639U
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Abstract
The utility model provides an impedance continuous-adjusting device for a low-voltage large-current temperature-rise test. Current ranging from dozens of amperes to thousands of amperes can be obtained accurately at low voltage. The impedance continuous-adjusting device is of a three-phase star-shaped structure formed by connecting single-phase units of the same structure. Each phase of impedance is composed of a boosting transformer, an automatic coupling voltage regulator, a reactor and the like. After the impedance continuous-adjusting device is adopted, test current can be adjusted in a large range continuously, active loss of a test device is lowered remarkably, impedance heating value is reduced, volume of the device is reduced, and installation and maintenance are convenient.
Description
Technical field
The utility model provides the low-voltage heavy current warming test with regulating continuously impedance means, is used for low-voltage electrical apparatus and complete electrical control cabinet temperature rise test fine adjustment current value.Belong to low-voltage electrical apparatus experimental technique field.
Background technology
Temperature rise test has material impact for the performance of electric equipment products, complete combined electric switch board.The rate of ageing that high energy is accelerated insulating material is crossed in temperature rise, causes discharge in insulation and puncture, and functional fault appears in the overheated meeting of components and parts, and the overheated fire that causes easily of solid insulating material is so that harm electrical equipment and personal safety.
Therefore temperature rise test is the important pilot project of low-pressure electronic equipment product safety certification.Its experiment quantity is large, and the test period is long.Especially there is following problem in test under full voltage: one, and load needs larger rated power, and needs current continuity adjustable, can increase test difficulty and maintenance cost; Its two because test product is equivalent to all drop into normal operation, need large capacity power source, the test product quantity that causes doing temperature rise test simultaneously reduces; Its three, test product runs on normal working voltage, any causality loss that causes because of the test product defective will be very large, has very large danger in the test; In addition, the loss of the circuit in the process of the test and transformer is also very large.
For addressing the above problem, need to adopt low-voltage high-current power source, need under lower voltage, to obtain tens amperes to the continuously adjustable test current of several kiloamperes.
The utility model content
The purpose of this utility model provides the low-voltage heavy current warming test with regulating continuously impedance means, and this device cooperates low-voltage high-current power source to use, and is used for continuously fine adjustment current value of low-voltage electrical apparatus and complete electrical control cabinet temperature rise test.
In order to realize above purpose, the scheme that the utility model is taked is, this device adopts the identical single-phase unit of structure to connect into the three-phase hub-and-spoke configuration, and every phase of impedance is comprised of step-up transformer, automatic coupling voltage regulator and reactor etc.This device can accurately obtain tens amperes to the test current of several kiloamperes under the voltage of several volts.
Description of drawings
Fig. 1 is the anti-plant system drawing of continuously resistance trimming of the utility model embodiment.
Fig. 2 is the application synoptic diagram of the utility model embodiment.
Embodiment
Below by specific concrete example embodiment of the present utility model is described, those skilled in the art can understand advantage of the present utility model and effect easily by the content that instructions discloses.The utility model also can be implemented or used by other different concrete examples, and every details of this instructions also can be based on different viewpoints and application, carries out various modifications and change under the spirit of the present utility model not deviating from.
The synoptic diagram of the utility model patent working example, as shown in Figure 1.This device comprises at least: step-up transformer, automatic coupling voltage regulator and reactor.Step-up transformer low voltage side only has the copper bar of several circles to be looped around the outside, so that heat radiation, the high-pressure side adopts thin copper enameled wire to be wrapped in the inboard of low-voltage coil.The leakage reactance that is determined by the clearance between the high-voltage coil and low-voltage coil can limit the load maximum current.Particularly its leakage reactance can limit the voltage at reactor two ends and the large electric current of restriction reactor when electric current is very large.The automatic coupling voltage regulator leakage reactance can be ignored, its secondary coil linked reactor.
After step-up transformer and automatic coupling voltage regulator two-stage were boosted, step-up transformer input end equiva lent impedance was very little, therefore can obtain the large electric current up to several kiloamperes.The continuous fine adjustment current value of variable autotransformer is installed in the step-up transformer rear end.Electric current can accurate adjustment principle be that automatic coupling voltage regulator carries out pressure regulation in position, the second level, the boosted transformer voltage ratio of variation range of regulating amplifies, thus can be on a large scale the fine adjustment test current.Because two-stage is boosted, loss and temperature rise in the actual loading circuit significantly reduce, and equipment volume is corresponding dwindling also.
Fig. 2 is this application of installation synoptic diagram.When carrying out temperature rise test, major loop is powered by power supply, and the loop connected respectively load in two minutes, and terminal is the adjustable impedance device.The utility model has the advantages that can be on a large scale continuous adjusting test electric current, significantly reduce the test unit active loss, reduce the impedance thermal value, the reduction equipment volume is convenient to I﹠M.
Above-described embodiment only is exemplary illustration principle of the present utility model and its effect, but not is used for restriction the utility model.Any those skilled in the art all can be under spirit of the present utility model and category, and above-described embodiment is modified and changed.Therefore, rights protection scope of the present utility model should be take the scope of claims as foundation.
Claims (1)
1. the low-voltage heavy current warming test is characterized in that with regulating continuously impedance means the single-phase unit combination that structure is identical becomes the three-phase hub-and-spoke configuration, comprises at least: step-up transformer, automatic coupling voltage regulator and reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220243952 CN202693639U (en) | 2012-05-29 | 2012-05-29 | Impedance continuous-adjusting device for low-voltage large-current temperature-rise test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220243952 CN202693639U (en) | 2012-05-29 | 2012-05-29 | Impedance continuous-adjusting device for low-voltage large-current temperature-rise test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202693639U true CN202693639U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220243952 Expired - Lifetime CN202693639U (en) | 2012-05-29 | 2012-05-29 | Impedance continuous-adjusting device for low-voltage large-current temperature-rise test |
Country Status (1)
| Country | Link |
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| CN (1) | CN202693639U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472272A (en) * | 2013-07-25 | 2013-12-25 | 浙江方圆电气设备检测有限公司 | Photovoltaic combiner-box DC current adjusting and testing device |
| CN104062478A (en) * | 2014-06-19 | 2014-09-24 | 苏州上电科电气设备有限公司 | Novel current regulation testing device |
| CN105406725A (en) * | 2015-11-23 | 2016-03-16 | 苏州华电电气股份有限公司 | Current source apparatus for high-voltage switch cabinet temperature rise test |
| CN107589282A (en) * | 2017-10-17 | 2018-01-16 | 云南电网有限责任公司电力科学研究院 | System occurs for a kind of high current |
| CN113030718A (en) * | 2021-03-25 | 2021-06-25 | 苏州电器科学研究院股份有限公司 | High-voltage switch temperature rise test method and system |
-
2012
- 2012-05-29 CN CN 201220243952 patent/CN202693639U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103472272A (en) * | 2013-07-25 | 2013-12-25 | 浙江方圆电气设备检测有限公司 | Photovoltaic combiner-box DC current adjusting and testing device |
| CN103472272B (en) * | 2013-07-25 | 2015-10-21 | 浙江方圆电气设备检测有限公司 | A kind of photovoltaic combiner box DC current regulates test unit |
| CN104062478A (en) * | 2014-06-19 | 2014-09-24 | 苏州上电科电气设备有限公司 | Novel current regulation testing device |
| CN105406725A (en) * | 2015-11-23 | 2016-03-16 | 苏州华电电气股份有限公司 | Current source apparatus for high-voltage switch cabinet temperature rise test |
| CN107589282A (en) * | 2017-10-17 | 2018-01-16 | 云南电网有限责任公司电力科学研究院 | System occurs for a kind of high current |
| CN113030718A (en) * | 2021-03-25 | 2021-06-25 | 苏州电器科学研究院股份有限公司 | High-voltage switch temperature rise test method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |