CN203365551U - Equipment for on-line detection of alternating current high voltage insulation resistance - Google Patents
Equipment for on-line detection of alternating current high voltage insulation resistance Download PDFInfo
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- CN203365551U CN203365551U CN 201320472189 CN201320472189U CN203365551U CN 203365551 U CN203365551 U CN 203365551U CN 201320472189 CN201320472189 CN 201320472189 CN 201320472189 U CN201320472189 U CN 201320472189U CN 203365551 U CN203365551 U CN 203365551U
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- voltage
- amplifier
- divider
- high voltage
- impedance
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Abstract
The utility model discloses equipment for on-line detection of alternating current high voltage insulation resistance. The equipment comprises a high voltage wire, a high voltage load resistor, a current transformer, a current amplifier, a voltage amplifier and a divider. The utility model provides equipment for on-line detection of alternating current high voltage insulation resistance, and has the advantages of safe and reliable measurement mode, direct and accurate measurement data and the like.
Description
Technical field
The utility model belongs to the automatic measure control field, relates in particular to the device of a kind of online detection ac high-voltage insulation impedance in online detection.
Background technology
Along with the development of power electronic devices, be accompanied by a large amount of power electronic equipment ranges of application more and more extensive, the important parameter of weighing power electronic equipment insulating property quality is the size of its insulating resistance value.The online quality that detects the insulativity of a large amount of power electronic equipments can not adopt surveying instrument commonly used, as digital multimeter, megohmmeter, insulation multimeter, Hi-pot Tester etc.
Reason is to adopt means commonly used to have very large drawbacks when measuring: during measurement operation very inconvenient, measuring accuracy is very low, mainly is used in non-on-line measurement.Megohmmeter commonly used is exactly a kind of insulation measurement instrument commonly used, and it is to weigh the high resistance megohmmeter of insulation degradation situation by measuring resistance under condition of high voltage.The susceptibility withstand voltage due to power electronic devices is very strong, under high-pressure situations, is easy to cause device to damage because of high pressure.Therefore for the problem of above existence, on original detection basis, carry out new revising of the functions, can carry out online the insulation resistance detection, have that metering system is safe and reliable, a measurement data advantage such as accurate directly perceived.
Summary of the invention
The purpose of this utility model is to provide a kind of device of online detection ac high-voltage insulation impedance, for online, detects the High-Voltage Insulation impedance, has that metering system is safe and reliable, a measurement data advantage such as accurate directly perceived.
The technical scheme that realizes above-mentioned purpose is: a kind of device of online detection ac high-voltage insulation impedance comprises: high-voltage conducting wires, high-voltage load impedance, current transformer, current amplifier, voltage amplifier and divider; Wherein:
Described high-voltage load impedance is connected in parallel between described high-voltage conducting wires and ground, described current transformer is the punching structure, the anti-ground wire of described high-voltage load passes described current transformer center pit, the coil output of described current transformer connects described current amplifier, the input end of described voltage amplifier connects respectively described high-voltage conducting wires and ground, the output terminal of described current amplifier connects the divisor input end of described divider, the output terminal of described voltage amplifier connects the dividend input end of described divider, the output data of described divider are the High-Voltage Insulation impedance measured.
Above-mentioned voltage amplifier is isolated amplifier.
Above-mentioned divider is divided by the Output rusults of above-mentioned current amplifier and above-mentioned voltage amplifier, obtains flowing through the insulation impedance of above-mentioned high-voltage load impedance.
Owing to having adopted the utility model device, a kind of device of online detection ac high-voltage insulation impedance is provided, detect the High-Voltage Insulation impedance for online, have that metering system is safe and reliable, a measurement data advantage such as accurate directly perceived.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Please refer to Fig. 1, provided a kind of device of online detection ac high-voltage insulation impedance in figure, comprising: high-voltage conducting wires L, high-voltage load impedance R, current transformer B, current amplifier A, voltage amplifier F and divider DIV; Wherein:
High-voltage load impedance R is connected in parallel between high-voltage conducting wires L and ground, current transformer B is the punching structure, the ground wire of high-voltage load impedance R is through current transformer B center pit, the coil output of current transformer B connects current amplifier A, the input end of voltage amplifier F connects respectively high-voltage conducting wires L and ground, the output terminal of described current amplifier connects the divisor input end of described divider, the output terminal of described voltage amplifier connects the dividend input end of described divider, and the output data of described divider are the High-Voltage Insulation impedance measured.
Voltage amplifier F is isolated amplifier.
Divider DIV is divided by the Output rusults of current amplifier A and voltage amplifier F, obtains flowing through the anti-insulation impedance of high-voltage load resistance R.
Principle of work of the present utility model is to utilize at ac high-voltage to detect electric current and voltage, realizes the online High-Voltage Insulation impedance that detects, and has that metering system is safe and reliable, a measurement data advantage such as accurate directly perceived.
Below embodiment has been described in detail the utility model by reference to the accompanying drawings, and those skilled in the art can make the many variations example to the utility model according to the above description.Thereby some details in embodiment should not form restriction of the present utility model, the utility model will be usingd scope that appended claims defines as protection domain of the present utility model.
Claims (3)
1. an online device that detects the ac high-voltage insulation impedance, is characterized in that, comprising: high-voltage conducting wires, high-voltage load impedance, current transformer, current amplifier, voltage amplifier and divider; Wherein:
Described high-voltage load impedance is connected in parallel between described high-voltage conducting wires and ground, described current transformer is the punching structure, the ground wire of described high-voltage load impedance is through described current transformer center pit, the coil output of described current transformer connects described current amplifier, the input end of described voltage amplifier connects respectively described high-voltage conducting wires and ground, the output terminal of described current amplifier connects the divisor input end of described divider, the output terminal of described voltage amplifier connects the dividend input end of described divider, the output data of described divider are the High-Voltage Insulation impedance measured.
2. the device of a kind of online detection ac high-voltage insulation impedance according to claim 1, is characterized in that, described voltage amplifier is isolated amplifier.
3. the device of a kind of online detection ac high-voltage insulation impedance according to claim 1, it is characterized in that, described divider is divided by the Output rusults of described current amplifier and described voltage amplifier, obtains flowing through the insulation impedance of described high-voltage load impedance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320472189 CN203365551U (en) | 2013-08-02 | 2013-08-02 | Equipment for on-line detection of alternating current high voltage insulation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320472189 CN203365551U (en) | 2013-08-02 | 2013-08-02 | Equipment for on-line detection of alternating current high voltage insulation resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203365551U true CN203365551U (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320472189 Expired - Fee Related CN203365551U (en) | 2013-08-02 | 2013-08-02 | Equipment for on-line detection of alternating current high voltage insulation resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203365551U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301320A (en) * | 2015-11-26 | 2016-02-03 | 北京东方计量测试研究所 | Alternating current impedance bridge |
-
2013
- 2013-08-02 CN CN 201320472189 patent/CN203365551U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301320A (en) * | 2015-11-26 | 2016-02-03 | 北京东方计量测试研究所 | Alternating current impedance bridge |
| CN105301320B (en) * | 2015-11-26 | 2018-03-02 | 北京东方计量测试研究所 | A kind of AC impedance electric bridge |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20160802 |