CN103311921B - A kind of power supply entering line switch and bus connection switch interlock connection circuit - Google Patents

A kind of power supply entering line switch and bus connection switch interlock connection circuit Download PDF

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Publication number
CN103311921B
CN103311921B CN201310180966.3A CN201310180966A CN103311921B CN 103311921 B CN103311921 B CN 103311921B CN 201310180966 A CN201310180966 A CN 201310180966A CN 103311921 B CN103311921 B CN 103311921B
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China
Prior art keywords
switch
circuit
microcomputer protection
protection unit
bus connection
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CN201310180966.3A
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CN103311921A (en
Inventor
李卫
罗富宝
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Tongling Power Supply Co of State Grid Anhui Electric Power Co Ltd
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Tongling Power Supply Co of State Grid Anhui Electric Power Co Ltd
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Abstract

The present invention relates to a kind of power supply entering line switch and bus connection switch interlocks 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 is connected with the output of control switch; the output of Microcomputer Protection unit is connected with the closing circuit of any one switch in described three switches, between the input being connected on control switch and Microcomputer Protection unit after the normally-closed contact parallel connection of other two switches.This circuit will be connected on the input of Microcomputer Protection unit after the normally-closed contact parallel connection being used for two switches of locking; after the normally-closed contact of parallel connection is all opened; Microcomputer Protection unit is when detection control circuit breaking; can avoid sending control loop template alarm signal, achieve blocking function simultaneously.

Description

A kind of power supply entering line switch and bus connection switch interlock connection circuit
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 interlocks connection circuit.
Background technology
For most of high voltage customer, in order to ensure power supply reliability, primary connection have employed 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 of buses, as shown in Figure 1, when one of them mains switch K1 or K2 disconnects, drop into bus connection switch K3 and make two sections of buses all charged, but drop into bus connection switch K3 when two mains switch K1 and K2 power, different system non-synchronous then can be caused arranged side by side, the stability of harm electric power system.So this just needs at three switches---any one switch in mains switch K1, K2, bus connection switch K3 adds necessary interlock circuit.
Most of interlock circuit is all connected between microcomputer protecting device and closing coil HQ; Figure 2 shows that the interlock circuit of mains switch K2; when the mains switch K1 in Fig. 1, bus connection switch K3 are in closing position; the normally-closed contact K1QF1 of the mains switch K1 in Fig. 2, the normally-closed contact K3QF3 of bus connection switch K3 disconnect; closing coil HQ is not charged, then the mains switch K2 in Fig. 1 cannot close a floodgate.But; microcomputer protecting device is when detection control circuit breaking; all detect protective device node a and control whether to break between power junctions b; because the normally-closed contact K1QF1 of mains switch K1, the normally-closed contact K3QF3 of bus connection switch K3 disconnect; the closing circuit of the mains switch K2 being in open position is disconnected, causes microcomputer protecting device often to send out control loop template alarm signal.
Summary of the invention
The object of this invention is to provide one avoids under normal circumstances, and microcomputer protecting device sends out the power supply entering line switch of control loop template alarm signal and bus connection switch interlocks connection circuit.
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 interlock 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 is connected with the output of control switch; the output of Microcomputer Protection unit is connected with the closing circuit of any one switch in described three switches, between the input being connected on control switch and Microcomputer Protection unit after the normally-closed contact parallel connection of other two switches.
Meanwhile, 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 electric current output pin is connected 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 electric current input pin of one termination Microcomputer Protection chip U1 of this parallel connected end, the other end is connected with the output of control switch.
Preferably; the closing circuit of described second source service entrance switch K2 is made up of auxiliary contacts of circuit breaker QF, spring energy-storage contact S2, closing coil HQ, experimental site contact S8 and contact, service position S9; one end of described auxiliary contacts of circuit breaker QF is connected with the electric current output pin of Microcomputer Protection chip U1; the other end is connected with one end of closing coil HQ by spring energy-storage contact S2, and the other end of closing coil HQ is connected with experimental site contact S8 or contact, service position S9.
Further, the input of described control switch connects 220V direct current by air switch DK.
Preferably, the closing circuit of described second source service entrance switch K2 connects 220V direct current by air switch DK.
Beneficial effect of the present invention is: this circuit will be connected on the input of Microcomputer Protection unit after the normally-closed contact parallel connection being used for two switches of locking; after the normally-closed contact of parallel connection is all opened; Microcomputer Protection unit is when detection control circuit breaking; can avoid sending control loop template alarm signal, achieve blocking function simultaneously.
Accompanying drawing explanation
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 marked in figure is as follows:
1-control switch
Embodiment
As shown in Figure 3; a kind of power supply entering line switch and bus connection switch interlock 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 is connected with the output of control switch 1; the output of Microcomputer Protection unit is connected with the closing circuit of any one switch in described three switches, between the input being connected on control switch 1 and Microcomputer Protection unit after the normally-closed contact parallel connection of other two switches.
Described Microcomputer Protection unit adopts Microcomputer Protection chip U1; its electric current output pin is connected 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 electric current input pin of one termination Microcomputer Protection chip U1 of this parallel connected end, the other end is connected with the output of control switch 1.
The closing circuit of described second source service entrance switch K2 is made up of auxiliary contacts of circuit breaker QF, spring energy-storage contact S2, closing coil HQ, experimental site contact S8 and contact, service position S9; one end of described auxiliary contacts of circuit breaker QF is connected with the electric current output pin of Microcomputer Protection chip U1; the other end is connected with one end of closing coil HQ by spring energy-storage contact S2, and the other end of closing coil HQ is connected with experimental site contact S8 or contact, service position S9.The input of described control switch 1 connects 220V direct current by air switch DK.The closing circuit of described second source service entrance switch K2 connects 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 closes, 220V direct current is powered to the closing circuit of second source service entrance switch K2 through the normally-closed contact K3FQ3 of air switch DK, control switch 1, bus connection switch K3, Microcomputer Protection unit 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, 220V direct current powers to the closing circuit 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 template detects protective device node a and control to break between power junctions b; the input of Microcomputer Protection unit will be connected on after the normally-closed contact parallel connection of the first electric power incoming line K switch 1, bus connection switch K3; detection control circuit breaking is opened from the normally-closed contact of the first electric power incoming line K switch 1, bus connection switch K3, breaking affects, avoid Microcomputer Protection unit and send out a control loop template alarm signal by mistake.
In the present invention, the locked loop of three switches is identical; the present invention is only for second source service entrance switch K2; in these three switches, the mode of connection of the locked loop of any one switch is: by parallel for other two switch normally-closed contacts, be then connected serially between its control switch 1 and Microcomputer Protection unit.
In sum; the present invention will be connected on the input of Microcomputer Protection unit after the normally-closed contact parallel connection being used for two switches of locking; after the normally-closed contact of parallel connection is all opened; Microcomputer Protection unit is when detection control circuit breaking; can avoid sending control loop template alarm signal, achieve blocking function simultaneously.

Claims (3)

1. a power supply entering line switch and bus connection switch interlock connection circuit, comprise the first electric power incoming line K switch 1, second source service entrance switch K2 and bus connection switch K3, the input of Microcomputer Protection unit is connected with the output of control switch (1), the output of Microcomputer Protection unit is connected with the closing circuit of any one switch in bus connection switch K3 with described first electric power incoming line K switch 1, second source service entrance switch K2, it is characterized in that: be connected between control switch (1) and the input of Microcomputer Protection unit after the normally-closed contact parallel connection of other two switches;
Described Microcomputer Protection unit adopts Microcomputer Protection chip U1, its electric current output pin is connected 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 electric current input pin of one termination Microcomputer Protection chip U1 of this parallel connected end, the other end is connected with the output of control switch (1);
The closing circuit of described second source service entrance switch K2 is made up of auxiliary contacts of circuit breaker QF, spring energy-storage contact S2, closing coil HQ, experimental site contact S8 and contact, service position S9; one end of described auxiliary contacts of circuit breaker QF is connected with the electric current output pin of Microcomputer Protection chip U1; the other end is connected with one end of closing coil HQ by spring energy-storage contact S2, and the other end of closing coil HQ is connected with experimental site contact S8 or contact, service position S9.
2. power supply entering line switch according to claim 1 and bus connection switch interlock connection circuit, it is characterized in that: the input of described control switch (1) connects 220V direct current by air switch DK.
3. power supply entering line switch according to claim 1 and bus connection switch interlock connection circuit, it is characterized in that: the closing circuit of described second source service entrance switch K2 connects 220V direct current by air switch DK.
CN201310180966.3A 2013-05-16 2013-05-16 A kind of power supply entering line switch and bus connection switch interlock connection circuit Active CN103311921B (en)

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

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CN103311921A CN103311921A (en) 2013-09-18
CN103311921B true CN103311921B (en) 2015-11-25

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
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
CN109148209B (en) * 2018-09-18 2019-07-09 四川行之智汇知识产权运营有限公司 A kind of power supply entering line mechanical interlocking of switch equipment operating method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2827703B1 (en) * 2001-07-18 2004-05-14 Schneider Electric Ind Sa MULTIPOLAR CONTACTOR-CIRCUIT-BREAKER APPARATUS
US8462471B2 (en) * 2007-09-30 2013-06-11 Huadao Huang Circuit interrupting device with high voltage surge protection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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