CN103311921A - Double-power-supply incoming line switch and bus coupler switch interlocking wiring circuit - Google Patents
Double-power-supply incoming line switch and bus coupler switch interlocking wiring circuit Download PDFInfo
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- CN103311921A CN103311921A CN2013101809663A CN201310180966A CN103311921A CN 103311921 A CN103311921 A CN 103311921A CN 2013101809663 A CN2013101809663 A CN 2013101809663A CN 201310180966 A CN201310180966 A CN 201310180966A CN 103311921 A CN103311921 A CN 103311921A
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Abstract
The invention relates to a double-power-supply incoming line switch and bus coupler switch interlocking wiring circuit, which comprises first and second power supply incoming line switches K1 and K2 and a bus coupler switch K3, wherein the input end of a microcomputer protection unit is connected with the output end of a control switch, the output end of the microcomputer protection unit is connected with a switch-on loop of any one switch in the three switches, and the normally closed contacts of the other two switches are connected between the input end of the microcomputer protection unit and the control switch after being connected in parallel. The circuit is used for connecting the normally closed contacts of the two locked switches to the input end of the microcomputer protection unit after the parallel connection, when all of the normally closed contacts in parallel connection are opened, when the microcomputer protection unit detects the circuit breaking of a control loop, control loop circuit breaking warning signals cannot be sent, and meanwhile, the locking function is realized.
Description
Technical field
The invention belongs to the technical field of relay protection of electric power system, be specifically related to a kind of power supply entering line switch and bus connection switch interlocking connection circuit.
Background technology
For most of high pressure users, in order to guarantee power supply reliability, primary connection has adopted the mode of connection of sectionalized single busbar connection, and access two-way independent current source is for subsequent use each other, is provided with mother between two sections buses, as shown in Figure 1, when one of them mains switch K1 or K2 disconnect, drop into bus connection switch K3 and make two sections buses all charged, but when two mains switch K1 and K2 power input bus connection switch K3, then can cause the non-synchronization paralleling of different system, the stability of harm electric power system.So these just need to be at three switches---any one switch among mains switch K1, K2, the bus connection switch K3 adds necessary interlock circuit.
Most of interlock circuits all are connected between microcomputer protecting device and the closing coil HQ; Figure 2 shows that the interlock circuit of mains switch K2; mains switch K1, bus connection switch K3 in Fig. 1 are in closing position; the normally-closed contact K1QF1 of mains switch K1 among Fig. 2, the normally-closed contact K3QF3 of bus connection switch K3 disconnect; closing coil HQ is not charged, and then the mains switch K2 among Fig. 1 can't close a floodgate.Yet; microcomputer protecting device is when detecting the control loop broken string; all be to detect between protective device node a and the control power junctions b whether to break; because the normally-closed contact K3QF3 of normally-closed contact K1QF1, the bus connection switch K3 of mains switch K1 disconnects; disconnect so that be in the closing circuit of the mains switch K2 of open position, cause microcomputer protecting device often to send out control loop broken string alarm signal.
Summary of the invention
The purpose of this invention is to provide a kind of avoiding under normal circumstances, microcomputer protecting device is sent out power supply entering line switch and the bus connection switch interlocking connection circuit of control loop broken string alarm signal.
For achieving the above object; the technical solution adopted in the present invention is: a kind of power supply entering line switch and bus connection switch interlocking connection circuit; comprise first and second electric power incoming line K switch 1, K2 and bus connection switch K3; the input of Microcomputer Protection unit links to each other with the output of control switch; the closing circuit of any one switch in the output of Microcomputer Protection unit and described three switches links to each other, and is connected on after the normally-closed contact parallel connection of other two switches between the input of control switch and Microcomputer Protection unit.
Simultaneously, the present invention can also be able to further realization by following technical measures:
Further; described Microcomputer Protection unit adopts Microcomputer Protection chip U1; its the 6th pin links to each other with the closing circuit of second source service entrance switch K2; the normally-closed contact K1QF1 of the first electric power incoming line K switch 1, the normally-closed contact K3QF3 of bus connection switch K3 are in parallel; the 5th pin of one termination Microcomputer Protection chip U1 of this parallel connected end, the other end links to each other with the output of control switch.
Preferably; the closing circuit of described second source service entrance switch K2 is comprised of auxiliary contacts of circuit breaker QF, spring energy-storage contact S2, closing coil HQ, experiment contact, position S8 and contact, service position S9; the end of described auxiliary contacts of circuit breaker QF links to each other with the 6th pin of Microcomputer Protection chip U1; the other end links to each other with the end of closing coil HQ by spring energy-storage contact S2, and the other end of closing coil HQ links to each other with experiment contact, position S8 or contact, service position S9.
Further, the input of described control switch connects the 220V direct current by air switch DK.
Preferably, the closing circuit of described second source service entrance switch K2 connects the 220V direct current by air switch DK.
Beneficial effect of the present invention is: this circuit has been connected on the input of Microcomputer Protection unit after will the normally-closed contact parallel connection for two switches of locking; after the normally-closed contact of parallel connection is all opened; the Microcomputer Protection unit is when detecting the control loop broken string; can avoid sending control loop broken string alarm signal, realize simultaneously blocking function.
Description of drawings
It is the wiring schematic diagram of prior art that Fig. 1,2 is;
Fig. 3 is wiring schematic diagram of the present invention.
The implication of mark is as follows among the figure:
1-control switch
Embodiment
As shown in Figure 3; a kind of power supply entering line switch and bus connection switch interlocking connection circuit; comprise first and second electric power incoming line K switch 1, K2 and bus connection switch K3; the input of Microcomputer Protection unit links to each other with the output of control switch 1; the closing circuit of any one switch in the output of Microcomputer Protection unit and described three switches links to each other, and is connected on after the normally-closed contact parallel connection of other two switches between the input of control switch 1 and Microcomputer Protection unit.
Described Microcomputer Protection unit adopts Microcomputer Protection chip U1; its the 6th pin links to each other with the closing circuit of second source service entrance switch K2; the normally-closed contact K1QF1 of the first electric power incoming line K switch 1, the normally-closed contact K3QF3 of bus connection switch K3 are in parallel; the 5th pin of one termination Microcomputer Protection chip U1 of this parallel connected end, the other end links to each other with the output of control switch 1.
The closing circuit of described second source service entrance switch K2 is comprised of auxiliary contacts of circuit breaker QF, spring energy-storage contact S2, closing coil HQ, experiment contact, position S8 and contact, service position S9; the end of described auxiliary contacts of circuit breaker QF links to each other with the 6th pin of Microcomputer Protection chip U1; the other end links to each other with the end of closing coil HQ by spring energy-storage contact S2, and the other end of closing coil HQ links to each other with experiment contact, position S8 or contact, service position S9.The input of described control switch 1 connects the 220V direct current by air switch DK.The closing circuit of described second source service entrance switch K2 connects the 220V direct current by air switch DK.
Below in conjunction with Fig. 3 the course of work of the present invention is further described.
When the first electric power incoming line K switch 1 is in closing position, its normally-closed contact K1FQ1 disconnects, when bus connection switch K3 is in open position, its normally-closed contact K3FQ1 is closed, the 220V direct current is powered to the closing circuit of second source service entrance switch K2 through normally-closed contact K3FQ3, the Microcomputer Protection unit of air switch DK, control switch 1, bus connection switch K3 successively, the closing circuit of second source service entrance switch K2 is intact, can close a floodgate;
When the first electric power incoming line K switch 1 is in closing position, its normally-closed contact K1FQ1 disconnects, when bus connection switch K3 is in closing position, its normally-closed contact K3FQ3 disconnects, the 220V direct current can't be given the closing circuit power supply of second source service entrance switch K2, the closing circuit of second source service entrance switch K2 disconnects, and forms locking.
Because whether Microcomputer Protection unit inspection control loop broken string is to detect between protective device node a and the control power junctions b to break; be connected on the input of Microcomputer Protection unit after the normally-closed contact parallel connection with the first electric power incoming line K switch 1, bus connection switch K3; the normally-closed contact that makes detection control loop broken string avoid the first electric power incoming line K switch 1, bus connection switch K3 is opened, disconnected impact, has avoided a Microcomputer Protection unit mistake control loop broken string alarm signal.
The locked loop of three switches is identical among the present invention; the present invention is only take second source service entrance switch K2 as example; the mode of connection of the locked loop of any switch is in these three switches: other two switch normally-closed contacts are in parallel, then be connected serially between its control switch 1 and the Microcomputer Protection unit.
In sum; the present invention has been connected on the input of Microcomputer Protection unit after will the normally-closed contact parallel connection for two switches of locking; after the normally-closed contact of parallel connection is all opened; the Microcomputer Protection unit is when detecting the control loop broken string; can avoid sending control loop broken string alarm signal, realize simultaneously blocking function.
Claims (5)
1. a power supply entering line switch and bus connection switch interlocking connection circuit; comprise first and second electric power incoming line K switch 1, K2 and bus connection switch K3; the input of Microcomputer Protection unit links to each other with the output of control switch (1); the closing circuit of any one switch in the output of Microcomputer Protection unit and described three switches links to each other, and it is characterized in that: be connected on after the normally-closed contact parallel connection of other two switches between the input of control switch (1) and Microcomputer Protection unit.
2. power supply entering line switch according to claim 1 and bus connection switch interlock connection circuit; it is characterized in that: described Microcomputer Protection unit adopts Microcomputer Protection chip U1; its the 6th pin links to each other with the closing circuit of second source service entrance switch K2; the normally-closed contact K1QF1 of the first electric power incoming line K switch 1, the normally-closed contact K3QF3 of bus connection switch K3 are in parallel; the 5th pin of one termination Microcomputer Protection chip U1 of this parallel connected end, the other end links to each other with the output of control switch (1).
3. power supply entering line switch according to claim 2 and bus connection switch interlock connection circuit; it is characterized in that: the closing circuit of described second source service entrance switch K2 is comprised of auxiliary contacts of circuit breaker QF, spring energy-storage contact S2, closing coil HQ, experiment contact, position S8 and contact, service position S9; the end of described auxiliary contacts of circuit breaker QF links to each other with the 6th pin of Microcomputer Protection chip U1; the other end links to each other with the end of closing coil HQ by spring energy-storage contact S2, and the other end of closing coil HQ links to each other with experiment contact, position S8 or contact, service position S9.
4. power supply entering line switch according to claim 2 and bus connection switch interlock connection circuit, and it is characterized in that: the input of described control switch (1) connects the 220V direct current by air switch DK.
5. power supply entering line switch according to claim 2 and bus connection switch interlock connection circuit, and it is characterized in that: the closing circuit of described second source service entrance switch K2 connects the 220V direct current by air switch DK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310180966.3A CN103311921B (en) | 2013-05-16 | 2013-05-16 | A kind of power supply entering line switch and bus connection switch interlock connection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310180966.3A CN103311921B (en) | 2013-05-16 | 2013-05-16 | A kind of power supply entering line switch and bus connection switch interlock connection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103311921A true CN103311921A (en) | 2013-09-18 |
| CN103311921B CN103311921B (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310180966.3A Active CN103311921B (en) | 2013-05-16 | 2013-05-16 | A kind of power supply entering line switch and bus connection switch interlock connection circuit |
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| CN (1) | CN103311921B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109148186A (en) * | 2018-09-18 | 2019-01-04 | 四川知创知识产权运营有限公司 | A kind of high-voltage circuitbreaker mechanical interlocking mechanism of dual power supply |
| CN109148209A (en) * | 2018-09-18 | 2019-01-04 | 四川知创知识产权运营有限公司 | A kind of power supply entering line mechanical interlocking of switch equipment operating method |
| CN117375208A (en) * | 2023-11-01 | 2024-01-09 | 希格玛电气(珠海)有限公司 | Novel control system of automatic switching equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030016103A1 (en) * | 2001-07-18 | 2003-01-23 | Schneider Electric Industries Sas | Multi-pole contactor-circuit breaker type switch |
| US20100073178A1 (en) * | 2007-09-30 | 2010-03-25 | Huadao Huang | Novel circuit interrupting device with high voltage surge protection |
| CN201570844U (en) * | 2009-12-09 | 2010-09-01 | 上海中发电气（集团）股份有限公司 | Breaker circuit with microcomputer protection and switching-on/off dry contacts |
| CN201717618U (en) * | 2010-05-27 | 2011-01-19 | 珠海欧力配电自动化系统有限公司 | Microcomputer protecting deice with anti-bouncing function |
| CN201994643U (en) * | 2011-04-13 | 2011-09-28 | 上海中发电气（集团）股份有限公司 | Microcomputer protection recloser and circuit breaker matching mechanism |
| CN203278233U (en) * | 2013-05-16 | 2013-11-06 | 安徽电力铜陵县供电有限责任公司 | Interlock wiring circuit with double-power supply wire inlet switch and bus tie switch |
-
2013
- 2013-05-16 CN CN201310180966.3A patent/CN103311921B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030016103A1 (en) * | 2001-07-18 | 2003-01-23 | Schneider Electric Industries Sas | Multi-pole contactor-circuit breaker type switch |
| US20100073178A1 (en) * | 2007-09-30 | 2010-03-25 | Huadao Huang | Novel circuit interrupting device with high voltage surge protection |
| CN201570844U (en) * | 2009-12-09 | 2010-09-01 | 上海中发电气（集团）股份有限公司 | Breaker circuit with microcomputer protection and switching-on/off dry contacts |
| CN201717618U (en) * | 2010-05-27 | 2011-01-19 | 珠海欧力配电自动化系统有限公司 | Microcomputer protecting deice with anti-bouncing function |
| CN201994643U (en) * | 2011-04-13 | 2011-09-28 | 上海中发电气（集团）股份有限公司 | Microcomputer protection recloser and circuit breaker matching mechanism |
| CN203278233U (en) * | 2013-05-16 | 2013-11-06 | 安徽电力铜陵县供电有限责任公司 | Interlock wiring circuit with double-power supply wire inlet switch and bus tie switch |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109148186A (en) * | 2018-09-18 | 2019-01-04 | 四川知创知识产权运营有限公司 | A kind of high-voltage circuitbreaker mechanical interlocking mechanism of dual power supply |
| CN109148209A (en) * | 2018-09-18 | 2019-01-04 | 四川知创知识产权运营有限公司 | A kind of power supply entering line mechanical interlocking of switch equipment operating method |
| CN117375208A (en) * | 2023-11-01 | 2024-01-09 | 希格玛电气(珠海)有限公司 | Novel control system of automatic switching equipment |
| CN117375208B (en) * | 2023-11-01 | 2024-05-24 | 希格玛电气(珠海)有限公司 | Novel control system of automatic switching equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103311921B (en) | 2015-11-25 |
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