CN202772028U - High-voltage power distribution cabinet maintenance back door electrical lockout circuit - Google Patents
High-voltage power distribution cabinet maintenance back door electrical lockout circuit Download PDFInfo
- Publication number
- CN202772028U CN202772028U CN 201220405957 CN201220405957U CN202772028U CN 202772028 U CN202772028 U CN 202772028U CN 201220405957 CN201220405957 CN 201220405957 CN 201220405957 U CN201220405957 U CN 201220405957U CN 202772028 U CN202772028 U CN 202772028U
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- back door
- switch
- voltage power
- earthing knife
- power distribution
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Abstract
The utility model discloses a high-voltage power distribution cabinet maintenance back door electrical lockout circuit, and belongs to the technical field of high-voltage electrical lockout. The circuit comprises a simulated state display contact and a low-voltage power supply, which are connected in a primary loop. The circuit further comprises a back door stroke switch, a grounding knife-switch lockout electromagnet, a grounding knife-switch auxiliary contact, and a back door electromagnetic lock. The back door stroke switch and the grounding knife-switch lockout electromagnet are connected in series. The grounding knife-switch auxiliary contact and the back door electromagnetic lock are connected in series. The back door stroke switch and the grounding knife-switch lockout electromagnet, and the grounding knife-switch auxiliary contact and the back door electromagnetic lock are connected in parallel and then are connected with the simulated state display contact and the low-voltage power supply in the primary loop. The electrical lockout circuit effectively realizes the electrical lockout function of a high-voltage power distribution cabinet maintenance back door, and achieves the objective that maintenance personnel is not allowed to operate a grounding knife-switch when the power distribution cabinet maintenance back door is opened, thereby effectively guaranteeing the safety of the maintenance personnel and reducing the maintenance risk.
Description
Technical field
The utility model is related to a kind of electric blocking circuit, and specifically a kind of high voltage power distributing cabinet is in maintenance, and back door electric blocking circuit problem belongs to high-voltage electrical apparatus lock-out techniques field.
Background technology
In the prior art; KYN28A-12 type indoor metal armoring central switch equipments; it is three-phase alternating current 50HZ single busbars and the complete power distribution equipment of sectionalized single busbar connection system; network power for receiving and distributing 3.6-12KV; and carry out power circuit control protection, monitoring and measuring, be mainly used in power plant, medium and small generator power transmission, industrial and mineral enterprises and institutions distribution and electric industry system secondary substation by electricity, power transmission and Large-scale High-Pressure motor start-up etc..But in the maintenance back door electric blocking circuit of existing power distribution cabinet, locking is relatively simple, and safety protection function is weaker; back door open when, maintainer remain to operate earthing knife-switch, there is serious potential safety hazard; especially in high voltage power distributing cabinet in use, such issues that it is especially outstanding.
Utility model content
The problem of existing for above-mentioned prior art, the utility model provides a kind of high voltage power distributing cabinet maintenance back door electric blocking circuit, effectively realize the electric blocking function of high-voltage power distribution cabinet back door, reach in the case where power distribution cabinet is opened at back door, the purpose that maintainer can not be operated to earthing knife-switch, ensure the personal safety of maintainer, reduction maintenance risk.
To achieve these goals, the utility model includes emulation mode display contact and the low-tension supply being connected on primary circuit, also include back door travel switch, earthing knife-switch latching electromagnet, earthing knife-switch auxiliary contact and back door electromagnetic lock, back door travel switch is connected with earthing knife-switch latching electromagnet, earthing knife-switch auxiliary contact is connected with back door electromagnetic lock, back door travel switch and earthing knife-switch latching electromagnet it is in parallel with earthing knife-switch auxiliary contact and back door electromagnetic lock after access primary circuit on emulation mode display contact and low-tension supply.
The beneficial effects of the utility model are：The contact and the mode of low-tension supply accessed by using back door travel switch and earthing knife-switch latching electromagnet after in parallel with earthing knife-switch auxiliary contact and back door electromagnetic lock on the emulation mode display on primary circuit, it have effectively achieved the electric blocking function of high-voltage power distribution cabinet back door, realize at power distribution cabinet back door in the case of opening, the purpose that maintainer can not be operated to earthing knife-switch, it is capable of the personal safety of effective guarantee maintainer, reduces maintenance risk.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
In figure：1st, emulation mode display contact, 2, back door travel switch, 3, earthing knife-switch latching electromagnet, 4, earthing knife-switch auxiliary contact, 5, back door electromagnetic lock, 6, low-tension supply.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, the electric blocking circuit includes emulation mode display contact 1 and the low-tension supply 6 being connected on primary circuit, also include back door travel switch 2, earthing knife-switch latching electromagnet 3, earthing knife-switch auxiliary contact 4 and back door electromagnetic lock 5, back door travel switch 2 is connected with earthing knife-switch latching electromagnet 3, earthing knife-switch auxiliary contact 4 is connected with back door electromagnetic lock 5, back door travel switch 2 and earthing knife-switch latching electromagnet 3 it is in parallel with earthing knife-switch auxiliary contact 4 and back door electromagnetic lock 5 after access primary circuit on emulation mode display contact 1 and low-tension supply 6.
Operation principle of the present utility model is：Work as primary circuit（Major loop）Dead electricity, when breaker is in testing position, the contact of emulation mode display contact 1（17,18）Closure it is in the conduction state, when back door when closed, the contact of back door travel switch 2 conducting, at this moment the earthing knife-switch latching electromagnet 3 of locking earthing knife-switch has electricity, and at this moment maintainer can operate earthing knife-switch；And when back door is opened, the contact of back door travel switch 2 can not be turned on, the at this moment dead electricity of earthing knife-switch latching electromagnet 3 of locking earthing knife-switch, earthing knife-switch can not be operated by allowing for maintainer；Only at earthing knife-switch when closing position state, i.e. earthing knife-switch and being grounded, earthing knife-switch auxiliary contact 4 is turned on, while the dead electricity of earthing knife-switch latching electromagnet 3, back door travel switch 2 disconnects, back door electromagnetic lock 5 it is electric after can open back door.
The electric blocking to high-voltage power distribution cabinet back door is thus have effectively achieved, is realized at power distribution cabinet back door in the case of opening, maintainer can not operate to earthing knife-switch, it is ensured that maintainer overhauls to high-voltage board in the secure state.
Claims (1)
1. a kind of high voltage power distributing cabinet overhauls back door electric blocking circuit, including the emulation mode display contact being connected on primary circuit（1）And low-tension supply（6）, it is characterised in that also including back door travel switch（2）, earthing knife-switch latching electromagnet（3）, earthing knife-switch auxiliary contact（4）With back door electromagnetic lock（5）, back door travel switch（2）With earthing knife-switch latching electromagnet（3）Series connection, earthing knife-switch auxiliary contact（4）With back door electromagnetic lock（5）Series connection, back door travel switch（2）With earthing knife-switch latching electromagnet（3）With earthing knife-switch auxiliary contact（4）With back door electromagnetic lock（5）The emulation mode display contact accessed after parallel connection on primary circuit（1）And low-tension supply（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220405957 CN202772028U (en) | 2012-08-15 | 2012-08-15 | High-voltage power distribution cabinet maintenance back door electrical lockout circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220405957 CN202772028U (en) | 2012-08-15 | 2012-08-15 | High-voltage power distribution cabinet maintenance back door electrical lockout circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202772028U true CN202772028U (en) | 2013-03-06 |
Family
ID=47778581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220405957 Expired - Lifetime CN202772028U (en) | 2012-08-15 | 2012-08-15 | High-voltage power distribution cabinet maintenance back door electrical lockout circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202772028U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856113A (en) * | 2012-08-15 | 2013-01-02 | 徐州新电高科电气有限公司 | Electric locking circuit of maintenance backdoor of high-voltage power distribution cabinet |
| CN104104025A (en) * | 2014-08-04 | 2014-10-15 | 南通星宇电气有限公司 | 35 KV double split box type substation |
-
2012
- 2012-08-15 CN CN 201220405957 patent/CN202772028U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856113A (en) * | 2012-08-15 | 2013-01-02 | 徐州新电高科电气有限公司 | Electric locking circuit of maintenance backdoor of high-voltage power distribution cabinet |
| CN104104025A (en) * | 2014-08-04 | 2014-10-15 | 南通星宇电气有限公司 | 35 KV double split box type substation |
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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: 20130306 |