CN202678014U - Overvoltage suppression resistor for detector connected with live high-voltage bus - Google Patents
Overvoltage suppression resistor for detector connected with live high-voltage bus Download PDFInfo
- Publication number
- CN202678014U CN202678014U CN 201220332942 CN201220332942U CN202678014U CN 202678014 U CN202678014 U CN 202678014U CN 201220332942 CN201220332942 CN 201220332942 CN 201220332942 U CN201220332942 U CN 201220332942U CN 202678014 U CN202678014 U CN 202678014U
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- Prior art keywords
- voltage bus
- high voltage
- insulated tube
- resistance
- verifying attachment
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Abstract
The utility model discloses an overvoltage suppression resistor for a detector connected with a live high-voltage bus. The overvoltage suppression resistor comprises an insulating tube and conductive liquid contained in the insulating tube, metal electrodes are movably connected with both ends of the insulating tube, and communicate with the internal space of the insulating tube and the external space, and seals which can prevent the conductive liquid from leaking out from between the metal electrodes and the insulating tube are arranged between the metal electrodes and the insulating tube. The overvoltage suppression resistor and the choosing method thereof can effectively eliminate arcs, and only slight arc light is produced at the moment of connection or disconnection. The transient action time is short (1 to 2 microseconds), the transient voltage produced at the moment of connection or disconnection cannot lead to flashover on the outer damping surface, the overall dimension and weight of the damping resistor are greatly reduced, space is saved, the structure is greatly simplified as well, and the cost is reduced.
Description
Technical field
The utility model relates to a kind of verifying attachment of charged access high voltage bus, particularly the Overvoltage suppressing resistance of charged access high voltage bus verifying attachment.
Background technology
During high voltage test, metering verification and insulating monitoring are used at the scene, sometimes need to provide accurately busbar voltage phase place and amplitude parameter, this parameter can be used for accurate determining apparatus insulation status.But the instrument transformer of the field has strengthened the error of instrument transformer usually owing to a variety of causes such as accuracy class, load, ageing of performance, has affected certainty of measurement.Existing instrument transformer accuracy test all needs to have a power failure and detects, can't realize charged demarcation, cause in time to assess the accuracy of instrument transformer secondary voltage, if error is larger, can directly cause the inaccurate of insulated on-line monitoring data, to the insulation situation appearance erroneous judgement of converting equipment.Adopt the mode of standard capacitor dividing potential drop to be acknowledged as effective, the most reliable mode.But it is in service that on-the-spot instrument transformer all generally is in, and generally is difficult to have a power failure to carry out stated accuracy.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art part, and a kind of charged instrument transformer check carried out that realizes is provided, and can prevent that verifying attachment from producing dangerous superpotential inhibition resistance when charged access high voltage bus.
A kind of Overvoltage suppressing resistance of charged access high voltage bus verifying attachment, its structural feature is: described inhibition resistance includes insulated tube, the splendid attire conducting liquid in insulated tube, two ends at insulated tube are connected with metal electrode, this electrode is linked up the interior or exterior space of insulated tube, is provided with between metal electrode and insulated tube and prevents the sealing device of conducting liquid from overflowing between the two.
In charged access high voltage bus verifying attachment, add Overvoltage suppressing resistance of the present utility model, like this when carrying out the mutual inductor on site calibration check, do not needing in the too large physical dimension situation, can obtain enough dampings again, when charged access and disconnection bus-bars conductor, the damping resistance upper end electrode is carried out arc discharge with high-voltage conducting wires first, and performance effectively suppresses the effect of temporary overvoltage.
Described conducting liquid is water.
Resistivity of water is chosen in 10～100 Europe rice.
Adopt the water of this resistivity can guarantee to have good damping.
Described water or be running water, or for to be mixed by running water and distilled water.
The caliber of described insulated tube is 1～3cm.
Can when guaranteeing that suppressing resistance has enough dampings, not need again too large physical dimension.
Described insulated tube or be toughened glass pipe or for plastic tube.
Optional 15～the 20cm of insulated tube length of the general 110kV grade of the length of insulated tube, the 220kV grade can be selected 20～30cm.
Described inhibition resistance resistance value
Between, in the formula, L is the equivalent inductance in the loop, C is the equivalent capacitance of capacitor.
Suppressing resistance exists
In the scope, can obtain better resultant effect.
In sum, the utility model following advantage compared to existing technology:
Inhibition resistance of the present utility model can play the effectiveness of good elimination electric arc, access and disconnect moment and only produce slight arc light.Transient state action time very short (in 1～2 microsecond), the transient voltage of access or disconnection moment generation can not cause damping outer surface flashover, greatly save overall dimension and the weight of damping resistance, saved the space, greatly simplified the structure again, reduced cost.
Description of drawings
Fig. 1 is the structural representation of the Overvoltage suppressing resistance of charged access high voltage bus verifying attachment of the present utility model.
Embodiment
Below in conjunction with embodiment the utility model is described in more detail.
A kind of described inhibition resistance of Overvoltage suppressing resistance of charged access high voltage bus verifying attachment as shown in Figure 1 includes insulated tube 1, the splendid attire conducting liquid 2 in insulated tube, be connected with metal electric 3 utmost points at the two ends of insulated tube, this electrode is linked up the interior or exterior space of insulated tube, is provided with between metal electrode and insulated tube and prevents the sealing device 4 of conducting liquid from overflowing between the two.Described sealing device is sealing ring.Described conducting liquid is water.The resistance selection of water is at 50 Europe rice.Described water is for to be mixed by running water and distilled water.The caliber of described insulated tube is 1～3cm.Described insulated tube or be the toughened glass pipe.
Optional 15～the 20cm of insulated tube length of the general 110kV grade of the length of insulated tube, the 220kV grade can be selected 20～30cm.
Described inhibition resistance value range of choice exists
Between, in the formula, L is the equivalent inductance in the loop, C is the equivalent capacitance of capacitor.
When the standard capacitor value is 10pF, add about stray capacitance value 10pF, the optimal damping resistor value of estimation should be greater than 10k Ω thus.According to above-mentioned resistance selection rule, can select resistance is resistance about 100k Ω.
It is same as the prior art that the present embodiment is not stated part.
Claims (9)
1. the Overvoltage suppressing resistance of a charged access high voltage bus verifying attachment, it is characterized in that: described inhibition resistance includes insulated tube, the splendid attire conducting liquid in insulated tube, two ends at insulated tube are connected with metal electrode, this electrode is linked up the interior or exterior space of insulated tube, is provided with between metal electrode and insulated tube and prevents the sealing device of conducting liquid from overflowing between the two.
2. the Overvoltage suppressing resistance of charged access high voltage bus verifying attachment according to claim 1, it is characterized in that: described conducting liquid is water.
3. the Overvoltage suppressing resistance of charged access high voltage bus verifying attachment according to claim 2, it is characterized in that: resistivity of water is at 10～100 Europe rice.
4. the Overvoltage suppressing resistance of charged access high voltage bus verifying attachment according to claim 3 is characterized in that: described water or be running water, or be by running water and distilled water mixture.
5. the Overvoltage suppressing resistance of charged access high voltage bus verifying attachment according to claim 4, it is characterized in that: the caliber of described insulated tube is 1～3cm.
6. the Overvoltage suppressing resistance of charged access high voltage bus verifying attachment according to claim 5 is characterized in that: described insulated tube or for the toughened glass pipe or be plastic tube.
7. the Overvoltage suppressing resistance of charged access high voltage bus verifying attachment according to claim 6, it is characterized in that: the optional 15～20cm of insulated tube length of the general 110kV grade of the length of insulated tube, the 220kV grade can be selected 20～30cm.
8. the Overvoltage suppressing resistance of the charged access high voltage bus verifying attachment of stating according to claim 7 is characterized in that: described inhibition resistance value range of choice exists
Between, in the formula, L is the equivalent inductance in the loop, C is the equivalent capacitance of capacitor.
9. the Overvoltage suppressing resistance of the charged access high voltage bus verifying attachment of stating according to claim 7 is characterized in that: suppress resistance and exist
In the scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332942 CN202678014U (en) | 2012-07-11 | 2012-07-11 | Overvoltage suppression resistor for detector connected with live high-voltage bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332942 CN202678014U (en) | 2012-07-11 | 2012-07-11 | Overvoltage suppression resistor for detector connected with live high-voltage bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678014U true CN202678014U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220332942 Expired - Fee Related CN202678014U (en) | 2012-07-11 | 2012-07-11 | Overvoltage suppression resistor for detector connected with live high-voltage bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202678014U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751062A (en) * | 2012-07-11 | 2012-10-24 | 福建省电力有限公司电力科学研究院 | Over-voltage suppressing resistor of live power-on high voltage bus checking device and selecting method of suppressing resistor |
-
2012
- 2012-07-11 CN CN 201220332942 patent/CN202678014U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751062A (en) * | 2012-07-11 | 2012-10-24 | 福建省电力有限公司电力科学研究院 | Over-voltage suppressing resistor of live power-on high voltage bus checking device and selecting method of suppressing resistor |
| CN102751062B (en) * | 2012-07-11 | 2015-09-02 | 国家电网公司 | The Overvoltage suppressing resistance of charged access high voltage bus verifying attachment and the system of selection of suppression resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID FUJIAN ELECTRIC POWER CO., LTD. Effective date: 20141216 Owner name: STATE GRID FUJIAN ELECTRIC POWER CO., LTD. ELECTRI Effective date: 20141216 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: ELECTRIC POWER RESEARCH INSTITUTE, STATE GRID FUJI Free format text: FORMER NAME: FUJIAN ELECTRIC POWER CO., LTD., ELECTRIC POWER RESEARCH INSTITUTE |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 350007 FUZHOU, FUJIAN PROVINCE TO: 100031 XICHENG, BEIJING |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 350007 No. 48, Garden Road, Cangshan District, Fujian, Fuzhou Patentee after: STATE GRID FUJIAN ELECTRIC POWER Research Institute Address before: 350007 No. 48, Garden Road, Cangshan District, Fujian, Fuzhou Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF FUJIAN ELECTRIC POWER Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141216 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: STATE GRID FUJIAN ELECTRIC POWER Co.,Ltd. Patentee after: STATE GRID FUJIAN ELECTRIC POWER Research Institute Address before: 350007 No. 48, Garden Road, Cangshan District, Fujian, Fuzhou Patentee before: STATE GRID FUJIAN ELECTRIC POWER Research Institute |
|
| 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: 20130116 Termination date: 20190711 |