CN202794373U - Device for monitoring overpressure of oil-immersed transformer online - Google Patents
Device for monitoring overpressure of oil-immersed transformer online Download PDFInfo
- Publication number
- CN202794373U CN202794373U CN 201220354856 CN201220354856U CN202794373U CN 202794373 U CN202794373 U CN 202794373U CN 201220354856 CN201220354856 CN 201220354856 CN 201220354856 U CN201220354856 U CN 201220354856U CN 202794373 U CN202794373 U CN 202794373U
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- electrode
- pressure sensitive
- oil
- threaded rod
- sensitive device
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Abstract
The utility model relates to a device for monitoring overpressure of an oil-immersed transformer online. The device comprises a pressure sensing device, a first electrode and a second electrode, wherein the first electrode is grounded, the second electrode is connected with a wiring terminal, an electrical contact piece of the pressure sensing device is electrically connected with the first electrode and the second electrode simultaneously or is switched on from the electrical connection state under the action of pressure, and the pressure sensing device, the first electrode and the second electrode are integrally sealed on a threaded rod through insulating material. The device provided by the utility model can sense the information of pressure increase continuously and online when an internal fault happens to the transformer equipment and timely send fault signals and is simple in structure and high in detection accuracy.
Description
Technical field
The utility model relates to the electrical equipment fault monitoring device take oil as insulating medium in a kind of electric system, specifically a kind of oil immersion type mutual-inductor overvoltage on-Line Monitor Device.
Background technology
The major insulation medium of oil-immersed current transformer, voltage transformer (VT) is cable paper dipping transformer oil.As time goes on this type insulating medium can wear out in application so that decreasing insulating.Will enter the insulation fault state when insulating property are not enough, high electric field decomposes generation gas with transformer oil, and these gases can make the mutual inductor internal pressure increase, and cause it to blast when hypertonia.At present the insulating property of these equipment are detected the dielectric loss angular measurement that can only periodically carry out product and to the stratographic analysis of transformer oil, whether judge this mutual inductor artificial according to these two testing results insulation fault can occur.Need to mutual inductor is out of service during detection, can't carry out online, continuous supervision, also can't in time find when breaking down in the mutual inductor insulation.
The utility model content
Detection for electric system oil-insulation medium in the prior art can't be carried out online, the continuous weak points such as supervision, and the technical problems to be solved in the utility model provides the oil immersion type mutual-inductor overvoltage on-Line Monitor Device that a kind of continuous, online in time perception mutual inductor device interior fault pressure increases.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
The utility model oil immersion type mutual-inductor overvoltage on-Line Monitor Device has pressure sensitive device, the first electrode and the second electrode, the first electrode grounding wherein, and the second electrode is connected with a connection terminal; The electric contact piece of pressure sensitive device is electrically connected simultaneously or opens from status of electrically connecting with the first electrode and the second electrode under pressure; Pressure sensitive device, the first electrode and the second electrode are locked on the threaded rod by insulating material integral body.
Described threaded rod central shaft touches the pressure sensitive device that is locked in insulating material inside to being perforate by this perforate transformer oil.
The end that described threaded rod has silicon rubber sealing body is sexangle.
The utlity model has following beneficial effect and advantage:
1. the information that pressure increases during the utility model can be continuous, online perception mutual inductor device interior fault, and can in time send fault-signal, simple in structure, the accuracy rate of detection is high.
Description of drawings
Fig. 1 is the utility model structure principle chart;
Fig. 2 is the utility model fundamental diagram;
Fig. 3 is the utility model sealed structural representation.
Wherein, 1 is the pressure sensitive device, and 2 is the first electrode, and 3 is the second electrode; 4 is threaded rod; 5 is through hole; 6 is silicon rubber sealing body; 7 is connection terminal.
Embodiment
The present invention is further elaborated below in conjunction with Figure of description.
As shown in Figure 1, the utility model oil immersion type mutual-inductor overvoltage on-Line Monitor Device has pressure sensitive device 1, the first electrode 2 and the second electrode 3, the first electrode 2 ground connection wherein, and the second electrode 3 is connected with a connection terminal; The electric contact piece of pressure sensitive device 1 is electrically connected (being equivalent to normal opened contact) simultaneously with the first electrode 2 and the second electrode 3 under pressure, and perhaps the electric contact piece of pressure sensitive device is opened (being equivalent to normally closed contact) from status of electrically connecting simultaneously with the first electrode and the second electrode under pressure; Pressure sensitive device 1, the first electrode 2 and the second electrode 3 are locked on the threaded rod by insulating material integral body, and this insulating material is silicon rubber.
In the present embodiment, pressure sensitive device 1 and two electrodes are locked in silicon rubber sealing body 6 inside, and connection terminal 7 exposes for wiring.As shown in Figure 3, pick-up unit assembling integral body is fixed on the threaded rod 4, in the middle of the threaded rod (along central shaft to) be perforate 5, pressure sensitive device 1 can be contacted with oily medium.Threaded rod 4 one ends are made sexangle, with the whole and silicon rubber sealing body 6 of bearing pressure monitoring device 1 assembling.The utility model integral body guarantees the sealing property except be connected necessary passage with mutual inductor, also will guarantee to be connected with mutual inductor the sealing of rear current transformer body.In the present embodiment, pick-up unit is often opened in the normal state.
As shown in Figure 2, the utility model need to be worked with support circuit.This device is installed on oil immersion type mutual-inductor or other the power equipment oil discharging valve or special joint take transformer oil as insulating medium, and the pressure sensitive device is communicated with device interior.When any insulation or other fault occurring, device interior produces gas rises internal pressure.When pressure rise during to this pressure sensitive device set pressure, promote electric contact piece short circuit the first electrode 2 and second electrode 3 of pressure sensitive device, pick-up unit is closed, immediately outwards sends fault-signal by external circuit.
Claims (3)
1. oil immersion type mutual-inductor overvoltage on-Line Monitor Device is characterized in that: have pressure sensitive device (1), the first electrode (2) and the second electrode (3), and the first electrode (2) ground connection wherein, the second electrode (3) is connected with a connection terminal; The electric contact piece of pressure sensitive device (1) is electrically connected simultaneously or opens from status of electrically connecting with the first electrode (2) and the second electrode (3) under pressure; Pressure sensitive device (1), the first electrode (2) and the second electrode (3) are locked on the threaded rod by insulating material integral body.
2. by the described oil immersion type mutual-inductor overvoltage of claim 1 on-Line Monitor Device, it is characterized in that: described threaded rod (4) central shaft touches the pressure sensitive device (1) that is locked in insulating material inside to being perforate (5) by this perforate (5) transformer oil.
3. by the described oil immersion type mutual-inductor overvoltage of claim 1 on-Line Monitor Device, it is characterized in that: the end that described threaded rod (4) has silicon rubber sealing body (6) is sexangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220354856 CN202794373U (en) | 2012-07-20 | 2012-07-20 | Device for monitoring overpressure of oil-immersed transformer online |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220354856 CN202794373U (en) | 2012-07-20 | 2012-07-20 | Device for monitoring overpressure of oil-immersed transformer online |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202794373U true CN202794373U (en) | 2013-03-13 |
Family
ID=47821615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220354856 Expired - Lifetime CN202794373U (en) | 2012-07-20 | 2012-07-20 | Device for monitoring overpressure of oil-immersed transformer online |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202794373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318849A (en) * | 2018-03-19 | 2018-07-24 | 国网新疆电力有限公司 | A kind of wireless sensor device and wireless detecting system |
-
2012
- 2012-07-20 CN CN 201220354856 patent/CN202794373U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318849A (en) * | 2018-03-19 | 2018-07-24 | 国网新疆电力有限公司 | A kind of wireless sensor device and wireless detecting 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: 20130313 |