CN201269980Y - Secondary control circuit for dual safe chain - Google Patents
Secondary control circuit for dual safe chain Download PDFInfo
- Publication number
- CN201269980Y CN201269980Y CNU2008201871688U CN200820187168U CN201269980Y CN 201269980 Y CN201269980 Y CN 201269980Y CN U2008201871688 U CNU2008201871688 U CN U2008201871688U CN 200820187168 U CN200820187168 U CN 200820187168U CN 201269980 Y CN201269980 Y CN 201269980Y
- Authority
- CN
- China
- Prior art keywords
- contactor
- coil
- secondary control
- normally closed
- serially connected
- 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
Images
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model relates to a secondary control loop of dual safety chain, which is characterized that in a power loop controlled by a circuit breaker QF, the normally closed nodes of a contactor KM3 and a contactor KM4 are set to be serially connected with the coil of a contactor KM2; the normally open contact of the contactor KM2 is set to be serially connected with the coil of a contractor KM1. The normally closed nodes of the contactor KM1 and the contactor KM2 is set to be serially connected with the coil of the contractor KM3; and the normally open contact of the contactor KM3 is set to be serially connected with the coil of the contractor KM4. The secondary control loop realizes the dual safety chain, thus greatly improving the reliability of the chain.
Description
Technical field
The utility model relates to the secondary control loop that is applied in the electrical equipment, more specifically says so to have the secondary control loop of safety interlocking.
Background technology
At present, the safety interlocking of most of secondary control loops designs for interlocking, and promptly the coil of contactor a is connected with the normally closed node of contactor b, and the coil of contactor b is connected with the normally closed node of contactor a.When contactor a gets when electric, its normally closed node disconnects, thereby guarantees that contactor a gets electric the time, and contactor b can not get; Otherwise when contactor b gets when electric, contactor a can not get electric, to realize the safety interlocking protection of equipment.But the design of this elements interlock when contactor a or b break down, makes its node normally not open and close, as when adhesion occurring, has just lost the effect of safety interlocking, thereby also just can't protect the safe operation of controlled device.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of pair of safety interlocking secondary control loop being provided, to improve functional reliability.
The utility model technical solution problem is taked following technical scheme:
The design feature of the two safety interlocking secondary control loops of the utility model is in the electric power loop by circuit breaker Q F control, the normally closed node that contactor KM3 and contactor KM4 are set is connected with the coil of contactor KM2, the setting of connecting with the coil of contactor KM1 of the normally opened contact of contactor KM2; The normally closed node that contactor KM1 and KM2 are set is connected with the coil of contactor KM3, the setting of connecting with the coil of contactor KM4 of the normally opened contact of contactor KM3.
In the utility model,, can make that all contactor KM2 must not when among contactor KM3 and the KM4 any one when getting only electricity.Equally, when contactor KM1 and KM2 any get only electricity, can make that all contactor KM3 must not electricity, realize two safety interlockings thus.Compared with the prior art, the beneficial effects of the utility model are embodied in:
Any contactor fault in contactor KM3 and KM4 makes its normally closed node can not regular event such as during adhesion, as long as another contactor non-fault just can not make contactor KM2 get; Equally, make that its normally closed node can not regular event such as during adhesion, as long as another contactor non-fault just can not make contactor KM3 get when contactor KM1 and any fault of KM2; Thereby the security of system performance is effectively improved.
Description of drawings
Fig. 1 is the utility model structural representation
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment
Referring to Fig. 1, present embodiment is in the electric power loop by circuit breaker Q F control, and the normally closed node that contactor KM3 and contactor KM4 are set is connected with the coil of contactor KM2, the setting of connecting with the coil of contactor KM1 of the normally opened contact of contactor KM2; The normally closed node that contactor KM1 and KM2 are set is connected with the coil of contactor KM3, the setting of connecting with the coil of contactor KM4 of the normally opened contact of contactor KM3.
In the embodiment shown in fig. 1, switch QC is set, when switch QC selection was moved with the B method of operation, the arbitrary normally closed node of KM3, KM4 disconnected, and can make that all the KM2 coil can not get.Equally, when switch QC selection moved with the A method of operation, the arbitrary normally closed node of KM1, KM2 disconnected KM3 can not be got.Thereby two safety interlockings of A, B two kinds of methods of operation have been realized.Simultaneously, make its node normally not open and close, the method for operation of this contactor control can not be started when arbitrary contactor breaks down.When arbitrary node can not normally open and close, all the safety failure that method of operation A, B move simultaneously can not appear.
Claims (1)
1, two safety interlocking secondary control loops, it is characterized in that in electric power loop by circuit breaker Q F control, the normally closed node that contactor KM3 and contactor KM4 are set is connected with the coil of contactor KM2, the setting of connecting with the coil of contactor KM1 of the normally opened contact of contactor KM2; The normally closed node that contactor KM1 and KM2 are set is connected with the coil of contactor KM3, the setting of connecting with the coil of contactor KM4 of the normally opened contact of contactor KM3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201871688U CN201269980Y (en) | 2008-09-25 | 2008-09-25 | Secondary control circuit for dual safe chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201871688U CN201269980Y (en) | 2008-09-25 | 2008-09-25 | Secondary control circuit for dual safe chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269980Y true CN201269980Y (en) | 2009-07-08 |
Family
ID=40842587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201871688U Expired - Fee Related CN201269980Y (en) | 2008-09-25 | 2008-09-25 | Secondary control circuit for dual safe chain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269980Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108803430A (en) * | 2018-07-06 | 2018-11-13 | 攀钢集团西昌钢钒有限公司 | A kind of converter inclining brake control circuit and converter brake |
-
2008
- 2008-09-25 CN CNU2008201871688U patent/CN201269980Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108803430A (en) * | 2018-07-06 | 2018-11-13 | 攀钢集团西昌钢钒有限公司 | A kind of converter inclining brake control circuit and converter brake |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204316189U (en) | Direct current system switch remote operation anti-error system | |
| CN201845666U (en) | Anti-burnt automatic protecting device of closing coil of breaker spring operation mechanism | |
| CN202917882U (en) | Drawer cabinet interlock mechanism | |
| CN202260153U (en) | Low voltage distribution two-input one-connect electrical interlock system | |
| CN102983522A (en) | Drawer interlocking mechanism | |
| CN201269980Y (en) | Secondary control circuit for dual safe chain | |
| CN202435052U (en) | Wind power converter loop control circuit | |
| CN203192723U (en) | Under-voltage trip gear for breaker | |
| CN201942376U (en) | Manual reset stop controller | |
| CN201549865U (en) | 10-35KV circuit microcomputer protection reclosing device | |
| CN204794328U (en) | Three -phase electricity dual supply automatic switching control equipment | |
| CN204794329U (en) | Single -phase electric dual supply automatic switching control equipment | |
| CN202534963U (en) | Structure preventing incorrect operation of high-voltage metering handcart | |
| CN202268633U (en) | Low-voltage power distribution cabinet with protection | |
| CN205159233U (en) | But circuit breaker of hot plugging controller | |
| CN201845074U (en) | Device for detecting operational state of oil pump motor | |
| CN202809689U (en) | Control device for hydraulic pilot oil circuit of excavating machine | |
| CN201716328U (en) | Short-circuit device for spark gap trigger tests | |
| CN203813426U (en) | Tripping protector for circuit breaker | |
| CN204680598U (en) | A kind of high reliability outdoor disconnector | |
| CN202886899U (en) | Intelligent synchronous switch | |
| CN204905103U (en) | One closes two disconnected electrical interlockss | |
| CN204244117U (en) | A kind of motor brake control device | |
| CN202695343U (en) | Electromagnetic type multifunctional circuit break control device | |
| CN103545795A (en) | Breaker tripping protector |
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: 20090708 Termination date: 20110925 |