CN203013602U - Directly-operated type earthing switch - Google Patents
Directly-operated type earthing switch Download PDFInfo
- Publication number
- CN203013602U CN203013602U CN 201320002010 CN201320002010U CN203013602U CN 203013602 U CN203013602 U CN 203013602U CN 201320002010 CN201320002010 CN 201320002010 CN 201320002010 U CN201320002010 U CN 201320002010U CN 203013602 U CN203013602 U CN 203013602U
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- Prior art keywords
- switch
- sliding contact
- directly
- operated type
- contact
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model discloses a directly-operated type earthing switch, which comprises an air insulation switch and a vacuum break switch. The air insulation switch comprises a sliding contact and a power unit which is used for supplying power for motion of the sliding contact. The vacuum break switch is a vacuum arc-extinguishing chamber with the short circuit closing capacity. A moving contact of the vacuum arc-extinguishing chamber is arranged on a motion trail of the sliding contact. The directly-operated type earthing switch is simple in structure, and achieves utilizing the vacuum break switch to close grounding current at the time of closing of the directly-operated type earthing switch through a directly-operated type earthing switch structure which connects the air insulation switch and the vacuum break switch in series to work. When the directly-operated type earthing switch is turned on, the air insulation switch is utilized to ensure insulating properties. Consequently, the directly-operated type earthing switch is safer in use.
Description
Technical field
The utility model relates to earthed switch field in the high voltage power transmission and transforming net, relates in particular to a kind of Direct Action Type earthed switch with air insulation fracture and vacuum short circuit current making capability.
Background technology
Power circuit distribution section is provided with high voltage ground switch usually, does the use of ground protection.Ground protection is even more important to maintenance, inspection operation personnel's personal safety.And this earthed switch closes the large electric current that produces when closing and has the characteristic that frequency is few and electric current can be decayed in time.
Operation power administrative department's requirement earthed switch equipment galvanic circle should have the significantly air insulation fracture of larger spacing under the switch opens situation at present.
Be subjected to subordinate's load effect, earthed switch closes when closing, and has sometimes larger making current.Take 12kV electric pressure equipment as example, under the 12kV electric pressure, maximum can reach 50kA; In this case, the general prebreakdown current of air fracture when contact closing can produce very strong high-temperature electric arc, and easy cause damage of equipment also involves personal safety.So the spacing of regulation air fracture needs 120mm-200mm.Just be not suitable in the place of some limited space like this installing.
Now to the inhibition of high-voltage arc usually by between contact with vacuum or fill with high insulating property gas and realize.Wherein vacuum mode is with its fracture distance little (9-12mm), pollution-free gas discharging (as SF6), be widely adopted without the advantage such as combustion explosion danger.But there is again the danger that failure of insulation occurs because of vacuum interrupter gas leakage in little fracture spacing.
The utility model content
The purpose of this utility model is to provide the Direct Action Type earthed switch that a kind of volume is little, the fracture spacing is little, safe and reliable.
The utility model adopts following technical proposals:
A kind of Direct Action Type earthed switch, comprise air insulation switch and vacuum fracture switch, described air insulation switch comprises sliding contact and the power set of power is provided for the sliding contact action, described vacuum fracture switch is a vacuum interrupter with short circuit making capability, be provided with back-moving spring between the moving contact of described vacuum interrupter and its shell body, the moving contact of described vacuum interrupter is arranged on the sliding contact movement locus.
Described sliding contact is by the insulating bar connecting power device.
Described power set comprise either-rotation motor, turbine worm, shift knob, and described either-rotation motor connects sliding contact by turbine worm.
One end of described sliding contact is connected fixed contact for connecting high-tension cable and earth connection with vacuum interrupter.
The utility model is simple in structure, by the Direct Action Type earthed switch structure of air insulation fracture and vacuum fracture operated in series connection, thereby realizing that the Direct Action Type earthed switch closes utilizes the vacuum fracture to close the splice grafting earth-current when closing, utilize air fracture to guarantee insulation property when opening, safer, reliable when the Direct Action Type earthed switch is used.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of Direct Action Type earthed switch, comprise air insulation switch and vacuum fracture switch, described air insulation switch comprises sliding contact 5 and the power set 8 of power is provided for sliding contact 5 actions, described vacuum fracture switch is a vacuum interrupter 2 with short circuit making capability, be provided with back-moving spring 3 between the moving contact 22 of described vacuum interrupter 2 and vacuum interrupter 2 housings, the moving contact 22 of described vacuum interrupter 2 is arranged on sliding contact 5 movement locus.Described vacuum interrupter generally has a moving contact and a fixed contact for the existing product that uses.
Described power set 8 comprise either-rotation motor, turbine worm, shift knob 10, and described shift knob 10 is used for controlling the backward rotation of carrying out of either-rotation motor, and described either-rotation motor connects sliding contact 5 by turbine worm.
Described sliding contact 5 is connected with earth connection 9 by electric connector 6, keeps electrical connectivity in the time of can keeping like this sliding contact 5 motion.
Described sliding contact 5 is by insulating bar 7 connecting power devices.Because sliding contact need to have conductivity, when the Direct Action Type earthed switch is closed, could import earth connection 9 to electric current like this, so be connected by insulating bar between sliding contact 5 and worm screw, when making work like this, motor can not be affected.
during work, when the push-button switch 10 of Direct Action Type earthed switch closes when closing, described either-rotation motor drives turbine worm and rotates, thereby scroll bar drives sliding contact 51 direction motion from lower position to high voltage cable, when sliding contact touches the moving contact 22 of vacuum interrupter 2, moving contact 22 compression reseting springs 3 are synchronized with the movement, when continuing to move and promote the vacuum fracture is closed, sliding contact 5 closes the pass splice grafting logical (being that moving contact 22 contacts with fixed contact 21) of completing whole high-tension circuit, this moment, high-tension electricity was just by moving, fixed contact and sliding contact 5 are connected to earth connection 9, thereby complete ground protection.
When the Direct Action Type earthed switch need to be opened, press the button switch 10, this moment, either-rotation motor can reverse, drive sliding contact 5 in the other direction motion by worm and gear this moment, and under the effect of back-moving spring 3, the vacuum fracture is that the dynamic and static contact in the vacuum extinction device first is opened, when sliding contact 5 motions break away from the moving contact contact point, air fracture also is opened, and stops until sliding contact 5 moves to the fully open position, and air fracture reaches larger safe insulation distance.
The fixed contact 21 that one end of described sliding contact 5 is connected with vacuum interrupter is used for connecting high-tension cable 1 and earth connection 9.When being the installation of this device, two terminals are arranged externally, be respectively fixed contact 21 and the sliding contact 5 of vacuum interrupter, can be connected to fixed contact 21 on high-voltage cable 1 during use, sliding contact is connected on earth connection 9; Also can be connected to sliding contact 5 on high-voltage cable 1, fixed contact 21 is connected on earth connection 9, can realize like this effect of Direct Action Type earthed switch, and safe, for installation has brought convenience.
Power set described in the utility model not only are confined to described power set, also can for other can provide power set, make sliding contact 5 carry out back and forth movement on set track as long as reach.
Claims (4)
1. Direct Action Type earthed switch, it is characterized in that: comprise air insulation switch and vacuum fracture switch, described air insulation switch comprises sliding contact and the power set of power is provided for the sliding contact action, described vacuum fracture switch is a vacuum interrupter with short circuit making capability, be provided with back-moving spring between the moving contact of described vacuum interrupter and its shell body, the moving contact of described vacuum interrupter is arranged on the sliding contact movement locus.
2. Direct Action Type earthed switch according to claim 1 is characterized in that: described sliding contact is by the insulating bar connecting power device.
3. Direct Action Type earthed switch according to claim 1, it is characterized in that: described power set comprise either-rotation motor, turbine worm, shift knob, described either-rotation motor connects sliding contact by turbine worm.
4. Direct Action Type earthed switch according to claim 1 is characterized in that: an end of described sliding contact is connected fixed contact and is used for connecting high-tension cable and earth connection with vacuum interrupter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320002010 CN203013602U (en) | 2013-01-05 | 2013-01-05 | Directly-operated type earthing switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320002010 CN203013602U (en) | 2013-01-05 | 2013-01-05 | Directly-operated type earthing switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203013602U true CN203013602U (en) | 2013-06-19 |
Family
ID=48605168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320002010 Expired - Fee Related CN203013602U (en) | 2013-01-05 | 2013-01-05 | Directly-operated type earthing switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203013602U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065859A (en) * | 2013-01-05 | 2013-04-24 | 许昌永新电气股份有限公司 | Directly-operated type earthing switch |
-
2013
- 2013-01-05 CN CN 201320002010 patent/CN203013602U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065859A (en) * | 2013-01-05 | 2013-04-24 | 许昌永新电气股份有限公司 | Directly-operated type earthing switch |
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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: 20130619 Termination date: 20190105 |