CN203070991U - Knife switch operation protective device - Google Patents
Knife switch operation protective device Download PDFInfo
- Publication number
- CN203070991U CN203070991U CN 201220701278 CN201220701278U CN203070991U CN 203070991 U CN203070991 U CN 203070991U CN 201220701278 CN201220701278 CN 201220701278 CN 201220701278 U CN201220701278 U CN 201220701278U CN 203070991 U CN203070991 U CN 203070991U
- Authority
- CN
- China
- Prior art keywords
- knife switch
- relay
- protective device
- disconnecting link
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 10
- 238000012423 maintenance Methods 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Abstract
The utility model discloses a knife switch operation protective device. A stroke switch is mounted between a knife switch and each of the two connecting levers, wherein the stroke switches are connected with a relay, and normally-closed contacts of the relay are connected in a working power supply circuit of the knife switch in series. When the knife switch is pulled, the angles between the knife switch and the connecting levers are changed, and the stroke switches are connected, so that the relay is electrified and the normally-closed contacts of the relay are disconnected, thereby disconnecting the working power supply circuit of the knife switch. Thus, arc surrounding the knife switch disappears, so that operation staff can maintain and process lines under power-off state, thereby guaranteeing safety of the operation staff.
Description
Technical field
The utility model relates to a kind of protective device, relates in particular to a kind of disconnecting link protective device.
Background technology
Disconnecting link is the simplest a kind of device for switching, is widely used in power domain.In the power construction field, operating personnel usually need to carry out line fault maintenance and work for the treatment of, and disconnecting link is usually used in cut-offfing 500 volts of following circuit, and it can only manual operation.According to the electric power safety standard, should cut off the power supply earlier, draw back disconnecting link again, but because operating personnel's carelessness, under the situation of the electricity of being everlasting constantly with regard to the broaching tool lock, because power on circuitry has electric arc often, thereby charged arc is hurted sb.'s feelings easily during switch operation, brings potential safety hazard to operating personnel.
Summary of the invention
The utility model provides a kind of switch operation protective device that the power domain operating personnel use of being convenient to, the operability and the fail safe that improve the feeder line fault maintenance and handle at deficiency of the prior art.
The technical solution of the utility model is: a kind of switch operation protective device, between two connecting levers of disconnecting link, travel switch is installed, and travel switch is connected with relay, and the normally-closed contact of relay is connected on the disconnecting link working power circuit.
Be equipped with travel switch on the connecting lever of the described disconnecting link left and right sides.
The beneficial effect of the utility model: the utility model provides a kind of assurance operating personnel to carry out line maintenance and processing under off-position, avoids live line working, has guaranteed operating personnel's safety.
Description of drawings
Fig. 1 is structural representation of the present utility model
Embodiment
As shown in Figure 1, a kind of switch operation protective device is separately installed with travel switch 3 between two connecting levers 2 of disconnecting link 1 left and right sides, and travel switch 3 is connected with relay, and the normally-closed contact of relay is connected on disconnecting link 1 working power circuit.
Broaching tool lock 1, disconnecting link opens along the direction of arrow, angle between disconnecting link 1 and the connecting lever 2 changes, travel switch 3 conductings, it is electric to make that relay gets, and the relay normally-closed contact disconnects, thereby disconnecting link 1 working power circuit is disconnected, electric arc disappears around the disconnecting link 1, and operating personnel can carry out line maintenance and work for the treatment of under off-position, thereby have guaranteed operating personnel's safety.
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Claims (2)
1. switch operation protective device, it is characterized in that: between two connecting levers of disconnecting link travel switch is installed, travel switch is connected with relay, and the normally-closed contact of relay is connected on the disconnecting link working power circuit.
2. switch operation protective device according to claim 1, it is characterized in that: the connecting lever in the disconnecting link left and right sides is equipped with travel switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701278 CN203070991U (en) | 2012-12-18 | 2012-12-18 | Knife switch operation protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220701278 CN203070991U (en) | 2012-12-18 | 2012-12-18 | Knife switch operation protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203070991U true CN203070991U (en) | 2013-07-17 |
Family
ID=48769755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220701278 Expired - Fee Related CN203070991U (en) | 2012-12-18 | 2012-12-18 | Knife switch operation protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203070991U (en) |
-
2012
- 2012-12-18 CN CN 201220701278 patent/CN203070991U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20131218 |