CN203645226U - Pressure protection structure of ring main unit - Google Patents
Pressure protection structure of ring main unit Download PDFInfo
- Publication number
- CN203645226U CN203645226U CN201320856686.5U CN201320856686U CN203645226U CN 203645226 U CN203645226 U CN 203645226U CN 201320856686 U CN201320856686 U CN 201320856686U CN 203645226 U CN203645226 U CN 203645226U
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- CN
- China
- Prior art keywords
- main unit
- ring main
- pressure
- switching circuit
- protection structure
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- Expired - Fee Related
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Abstract
The utility model relates to a ring main unit technology used in an electric power system, particularly to a pressure protection structure of a ring main unit. The pressure protection structure comprises pressure sensors, and a pressure controller; each load switch on incoming line and outgoing line loops of the ring main unit is internally provided with one pressure sensor, the pressure controller is provided with a switching circuit controlled by the pressure sensor, and a switch of the switching circuit is connected with a start button of an operating motor on a corresponding electric operating mechanism on the incoming line or outgoing line loop of the ring main unit in parallel. The pressure protection structure of the ring main unit has the advantages that gas pressure protection of the ring main unit can be realized, and a circumstance that discharge and even an explosion accident of the ring main unit occur since gas pressure is too high is prevented, thereby effectively improving using safety and reliability of the ring main unit.
Description
Technical field
The utility model relates to high-tension switch cabinet technology used in electric power system, especially relates to a kind of ring main unit pressure protect structure.
Background technology
High-tension switch cabinet is transmission facility conventional in electrical power transmission system, ring main unit is a kind of very important high-voltage switch gear cabinet equipment, mainly by electrical equipment zero devices such as on-load switch, fuse and motor-operating mechanisms, described motor-operating mechanism switches on and off for operational load switch, utilizes described motor-operating mechanism people just can in the Control Room of ring main unit, carry out remote operation to ring main unit.High-voltage ring main unit is in actual motion, and due to a variety of causes, the gas pressure in the on-load switch of ring main unit there will be too high situation.The too high meeting of gas pressure causes the gas expansion in the on-load switch in ring main unit, finally can cause occurring ring main unit explosive incident, thereby brings life danger, economy and emotional distress to enterprise, society and the people.At present; ring main unit only relies on fuse to carry out error protection to the transmission line circuit of ring main unit conventionally; when transmission line circuit breaks down while causing electric current excessive; fuse on transmission line circuit can blow; thereby transmission line circuit is realized to protection; entirety sees that the defencive function of ring main unit is on the low side, has reduced safety in utilization and the reliability of ring main unit.
Summary of the invention
Main goal of the invention of the present utility model is to provide a kind of ring main unit pressure protect structure that can realize to ring main unit pressure protect.
The utility model technical scheme used is: a kind of ring main unit pressure protect structure, comprises pressure sensor, pressure controller; A pressure sensor is set in the each on-load switch on the inlet wire of ring main unit and transmission line circuit, pressure controller is provided with the switching circuit by pressure sensor control, the start button parallel connection of the operating electrical machines on the respective electrical pneumatic operating mechanism on the switch of described switching circuit and the inlet wire of ring main unit or transmission line circuit.
The utility model; in each on-load switch in the inlet wire of ring main unit and outlet, all establish a pressure sensor; a pressure controller of each pressure sensor configuration; when the gas pressure in on-load switch too high (being also that gas pressure is more than or equal to two atmospheric pressure); pressure sensor controlled pressure controller is connected the power supply of the operating electrical machines of respective electrical pneumatic operating mechanism; operating electrical machines is switched on and is started motor-operating mechanism disconnection on-load switch; thereby ring main unit is played to pressure protect effect, can prevent that explosion accident from appearring in ring main unit.
As preferably, the utility model also comprises the accident indicator being located on ring main unit monitor screen, the switching circuit electrical connection on described accident indicator and pressure controller.This preferred version, too high or too low and cause while opening circuit when the air pressure in an on-load switch, corresponding accident indicator is started working, and indicating to people is that the too high situation of air pressure appears in that on-load switch, is convenient to people ring main unit is carried out to repair and maintenance.
As preferably, described accident indicator is photoflash lamp alarm, or is voice guard, or is audible-visual annunciator.
As preferably, described pressure controller is located in the Control Room of ring main unit.This preferred version, pressure controller, by the storage battery power supply in ring main unit Control Room, can guarantee still can normally work in the time of power circuit power-off, improves the protective effect to ring main unit.
In sum, the beneficial effect that the utility model brings is: can realize air pressure protection to ring main unit, improve safety in utilization and the reliability of ring main unit.
Accompanying drawing explanation
Fig. 1 is a kind of electrical block diagram of the present utility model.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
As shown in Figure 1, the utility model comprises pressure sensor 1, pressure controller 2; A pressure sensor 1 is set in the each on-load switch on the inlet wire of ring main unit and transmission line circuit, pressure controller 2 is provided with the switching circuit of being controlled by pressure sensor 1, and the start button 4(of the operating electrical machines 3 on the respective electrical pneumatic operating mechanism on the switch 2.1 of described switching circuit and inlet wire or the transmission line circuit of ring main unit is located on the monitor screen in the Control Room of ring main unit) parallel connection.As preferably, described pressure controller 2 is located in the Control Room of ring main unit, it is an open type direct current relay, powered by the storage battery 6 being located in the Control Room of ring main unit, the contact of this direct current relay forms the switch 2.1 of switching circuit, described pressure sensor 1 is connected on the wire loop of this direct current relay, in the time that the gas pressure in ring main unit is in normal range (NR), the wire loop of this direct current relay is equivalent to off state, the contact of this direct current relay is in off-state, when the gas pressure in ring main unit too high (air pressure in ring main unit is more than or equal to two atmospheric pressure), the wire loop energising of this direct current relay, the closing of contact of this direct current relay, thereby connect the power supply of the operating electrical machines 3 of corresponding motor-operating mechanism, operating electrical machines 3 starts breaks on-load switch, thereby whole current supply circuit is played to pressure protect effect.For the ease of checking, pointing out of analysis of failure, the utility model is also provided with the accident indicator 5 being located on ring main unit monitor screen, switching circuit electrical connection on described accident indicator 5 and pressure controller 2, wherein said accident indicator 5 or be photoflash lamp alarm, or be voice guard, or be audible-visual annunciator, the present embodiment is preferably audible-visual annunciator, described accident indicator 5 one end are connected with the positive pole of storage battery 6, one end that the other end is connected with the coil of pressure controller 2 with pressure sensor 1 is connected, when the coil electricity of pressure controller 2, accident indicator 5 is switched on and is sent sound and light alarm signal.
The specific embodiment of the above is only preferably execution mode of the utility model, not limits concrete practical range of the present utility model with this.The equivalence variation that all shapes according to the utility model, structure are done ought to all be included in protection range of the present utility model.
Claims (6)
1. a ring main unit pressure protect structure, is characterized in that: comprise pressure sensor (1), pressure controller (2); A pressure sensor (1) is set in the each on-load switch on the inlet wire of ring main unit and transmission line circuit, pressure controller (2) is provided with the switching circuit of being controlled by pressure sensor (1), start button (4) parallel connection of the operating electrical machines (3) on the respective electrical pneumatic operating mechanism on the switch (2.1) of described switching circuit and inlet wire or the transmission line circuit of ring main unit.
2. ring main unit pressure protect structure according to claim 1, is characterized in that: also comprise the accident indicator (5) being located on ring main unit monitor screen, the switching circuit electrical connection on described accident indicator (5) and pressure controller (2).
3. ring main unit pressure protect structure according to claim 2, is characterized in that: described accident indicator is photoflash lamp alarm.
4. ring main unit pressure protect structure according to claim 2, is characterized in that: described accident indicator is voice guard.
5. ring main unit pressure protect structure according to claim 2, is characterized in that: described accident indicator is audible-visual annunciator.
6. according to the ring main unit pressure protect structure described in claim 1 to 5 any one, it is characterized in that: described pressure controller (2) is located in the Control Room of ring main unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320856686.5U CN203645226U (en) | 2013-12-23 | 2013-12-23 | Pressure protection structure of ring main unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320856686.5U CN203645226U (en) | 2013-12-23 | 2013-12-23 | Pressure protection structure of ring main unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203645226U true CN203645226U (en) | 2014-06-11 |
Family
ID=50876447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320856686.5U Expired - Fee Related CN203645226U (en) | 2013-12-23 | 2013-12-23 | Pressure protection structure of ring main unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203645226U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682246A (en) * | 2015-02-11 | 2015-06-03 | 国网浙江海盐县供电公司 | SF6 leakage warning device for distribution network switching station |
| CN105990806A (en) * | 2016-06-20 | 2016-10-05 | 南京恒众机械有限公司 | Explosion-proof ring main unit |
-
2013
- 2013-12-23 CN CN201320856686.5U patent/CN203645226U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682246A (en) * | 2015-02-11 | 2015-06-03 | 国网浙江海盐县供电公司 | SF6 leakage warning device for distribution network switching station |
| CN105990806A (en) * | 2016-06-20 | 2016-10-05 | 南京恒众机械有限公司 | Explosion-proof ring main unit |
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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: 20140611 Termination date: 20201223 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |