CN202395514U - Dual-power switching device - Google Patents

Dual-power switching device Download PDF

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Publication number
CN202395514U
CN202395514U CN2011204692836U CN201120469283U CN202395514U CN 202395514 U CN202395514 U CN 202395514U CN 2011204692836 U CN2011204692836 U CN 2011204692836U CN 201120469283 U CN201120469283 U CN 201120469283U CN 202395514 U CN202395514 U CN 202395514U
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CN
China
Prior art keywords
power supply
contactor
output line
line
loop
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
Application number
CN2011204692836U
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Chinese (zh)
Inventor
栾兆静
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Liancheng Group Co Ltd
Original Assignee
Shanghai Liancheng Group Co Ltd
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Priority to CN2011204692836U priority Critical patent/CN202395514U/en
Application granted granted Critical
Publication of CN202395514U publication Critical patent/CN202395514U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a dual-power switching device. A main contact of a first contractor in a main power control circuit is disposed between a main power supply output line and a loading power grid, and an output line between a main power supply and the main contact is respectively connected with an intermediate relay coil loop, a loop formed by series connection of a first contactor coil, a normally-open contact of an intermediate relay and a normally-closed contact of a second contactor, and another loop formed by series connection of an indicator light and the normally-open contact of the first contactor. The main contact of the second contactor in a standby power supply control circuit is disposed between a standby power supply output line and the loading power grid, and the output line between a standby power supply and the main contact is respectively connected with a loop formed by series connection of a second contactor coil, a normally-closed contact of the first contactor and a normally-closed contact of the intermediate relay, and another loop formed by series connection of the indicator light and a normally-open contact of the second contactor. The dual-power switching device disclosed by the utility model has the advantages of simple structure, safety, reliability and convenience in operation, and does not cause accidents resulting from maloperations; and in the case of a failure in a circuit, the failure cause can be rapidly inspected, so that the time of maintenance and repairing is greatly shortened.

Description

A kind of double-power supply switching device
Technical field
The utility model relates to the conversion equipment that is used between three-phase alternating-current supply, especially double-power supply switching device.
Background technology
Along with the develop rapidly of Chinese national economy, earth-shaking variation has all taken place in social all trades and professions.Need from safety in production and quantity-produced, all there have been very high requirement in many industries and department to power supply quality.The fire fighting monitoring of skyscraper, the illumination of hospital operating room, airdrome lighting, important production line or the like will bring immeasurable loss if having a power failure midway, and in this case, it is considerable that a stand-by power supply is arranged.When mains power failure, can switch to stand-by power supply and use.
Yet duplicate supply controller of the prior art but has a lot of places unsatisfactory, in practical application, usually mains power failure can occur, the situation that stand-by power supply but can not drop into.Even if keep in repair and change the time that the duplicate supply controller also often need interrupt the power supply several hrs at once, bring very big inconvenience to the user, and can not allow especially at some special occasions.
Summary of the invention
The utility model technical issues that need to address are to overcome defective in the prior art; Provide a kind of simple in structure, performance is safe and reliable, with low cost, be easy to processing or change, can not influence the duplicate supply control transformation device that stand-by power supply is supplied power because of mains power failure.
The utility model has adopted following technical proposal to solve its technical problem: a kind of double-power supply switching device; Comprise three-phase alternating current main power source output line and three-phase alternating current stand-by power supply output line; Separately phase line, zero line is docked with corresponding phase line, zero line on the load electrical network in main power source output line and the stand-by power supply output line, it is characterized in that:
Be equipped with the main power source control circuit on the main power source output line, be equipped with the stand-by power supply control circuit on the stand-by power supply output line,
Described main power source control circuit comprises first A.C. contactor and auxiliary relay; Three utmost point main contactss of this first A.C. contactor place on the main power source output line between main power source and the load electrical network, on the main power source output line between main power source and three utmost point main contactss, are connected respectively
An auxiliary relay coil working loop;
A loop that is connected in series by first ac contactor coil, auxiliary relay normally opened contact, the second A.C. contactor normally-closed contact;
And loop that is connected in series by the indicator light and the first A.C. contactor normally opened contact;
Described stand-by power supply control circuit comprises second A.C. contactor; Three utmost point main contactss of this second A.C. contactor place on the stand-by power supply output line between stand-by power supply and the load electrical network, on the stand-by power supply output line between stand-by power supply and three utmost point main contactss, are connected respectively
A loop that is connected in series by second ac contactor coil, the first A.C. contactor normally-closed contact, auxiliary relay normally-closed contact;
And loop that is connected in series by the indicator light and the second A.C. contactor normally opened contact.
The utility model respectively adds an A.C. contactor in main power source output line and stand-by power supply output line circuit; And it is ingenious and the position of main contacts, normally closed, normally opened contact rationally is set; Make it to form respectively main power source control circuit and stand-by power supply control circuit, the on-off switch of security control main power source and stand-by power supply output line.On main power source output line and stand-by power supply output line, circuit breaker is set, to increase the reliability of outlet line, the fuse of having connected respectively in each control circuit is so that promote the fail safe of circuit more.
The beneficial effect of the utility model:
1, the utility model also has the open-phase protection effect except having conventional decompression, under-voltage, overcurrent and short-circuit protection.
2, the utility model circuit structure is simple, and is safe and reliable, easy to operate, can not cause power supply switching accident because of misoperation.
3, the used components and parts of the utility model circuit are common components and parts, change simply, and fault detect is convenient, produces if any fault, and the reason that can fast detecting be out of order has shortened time of maintenance and repair circuit greatly.
4, there are not capacitor and other to be subject to the non-linear element that high order harmonic component is disturbed in the utility model circuit, can stable operation in the electric power system of high order harmonic component serious interference.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Each literal or numerical chracter among its figure are expressed as respectively:
1-three-phase alternating current main power source output line (wherein: A-first phase line, B-second phase line, C-third phase line, N-zero line);
2-main power source control circuit;
3-three-phase alternating current stand-by power supply output line (wherein: A '-first phase line, B '-second phase line, C '-third phase line, N-zero line);
4-stand-by power supply control circuit;
5-load electrical network (wherein: L1, L2, L3-phase line; The N-zero line);
KM01-first ac contactor coil; Three utmost point main contactss of KM01-0-first A.C. contactor; The KM01-1-first A.C. contactor normally opened contact; The KM01-2-first A.C. contactor normally-closed contact;
KM02-second ac contactor coil; Three utmost point main contactss of KM02-0-second A.C. contactor; The KM02-1-second A.C. contactor normally-closed contact; The KM02-2-second A.C. contactor normally opened contact;
KA01-auxiliary relay coil; KA01-1-auxiliary relay normally opened contact; KA01-2-auxiliary relay normally-closed contact;
HL01~HL04-indicator light;
FU01~FU06-fuse;
SA01~SA02-change over switch;
QF01~QF02-lead-in circuit breaker.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is done further to describe.
With reference to accompanying drawing, the utility model comprises three-phase alternating current main power source output line 1 and three-phase alternating-current supply output line 3.The first phase line A in the main power source output line 1, the second phase line B, third phase line C and zero line N correspondence are docked with phase line L1, L2, L3 and the zero line N on the load electrical network 5; The first phase line A ' in the stand-by power supply output line 3, the second phase line B ', third phase line C ' and zero line N also correspondence are docked with phase line L1, L2, L3 and the zero line N on the load electrical network 5.
The utility model is equipped with main power source control circuit 2 on main power source output line 1, be equipped with stand-by power supply control circuit 4 on the stand-by power supply output line 3.
The described main power source control circuit 2 of the utility model comprises first A.C. contactor and auxiliary relay.Three utmost point main contacts KM01-0 of this first A.C. contactor place on the main power source output line 1 between main power source and the load electrical network 5.
The described main power source control circuit 2 of the utility model is connected the work loop of an auxiliary relay coil KA01 on the main power source output line 1 between main power source and three utmost point main contacts KM01-0.Particularly, this work loop is connected on the first phase line A and third phase C line of main power source output line 1.Auxiliary relay coil KA01 two ends in this work loop also be connected in series respectively two fuse F U02, FU03.
The described main power source control circuit 2 of the utility model also is connected a loop that is connected in series by the first ac contactor coil KM01, auxiliary relay normally opened contact KA01-1, the second A.C. contactor normally-closed contact KM02-1 on the main power source output line 1 between main power source and three utmost point main contacts KM01-0.Particularly, this loop is connected on the second phase line B and zero line N of main power source output line 1.An end that connects the second phase line B in this loop also be connected in series respectively a fuse F U04 and a change over switch SA01.
The described main power source control circuit 2 of the utility model also is connected a loop that is connected in series by the indicator light HL02 and the first A.C. contactor normally opened contact KM01-1 on the main power source output line 1 between main power source and three utmost point main contacts KM01-0, form main power source working condition indication loop.Particularly, this loop is connected on the second phase line B and zero line N of main power source output line 1.When being connected in series fuse F U04 and change over switch SA01 in the loop at first ac contactor coil KM01 place; The be connected in series end in loop of the indicator light HL02 and the first A.C. contactor normally opened contact KM01-1 can be connected on the node between fuse F U04 and the change over switch SA01, and the other end connects zero line N.
The described stand-by power supply control circuit 4 of the utility model comprises second A.C. contactor, and three utmost point main contacts KM02-0 of this second A.C. contactor place on the stand-by power supply output line 3 between stand-by power supply and the load electrical network 5.
The described stand-by power supply control circuit 4 of the utility model is connected a loop that is connected in series by the second ac contactor coil KM02, the first A.C. contactor normally-closed contact KM01-2, auxiliary relay normally-closed contact KA01-2 on the stand-by power supply output line 3 between stand-by power supply and three utmost point main contacts KM02-0.Particularly, this loop is connected on the second phase line B ' and zero line N of stand-by power supply output line 3.An end that connects the second phase line B ' in this loop also be connected in series respectively a fuse F U06 and a change over switch SA02.
The described stand-by power supply control circuit 4 of the utility model is connected a loop that is connected in series by the indicator light HL04 and the second A.C. contactor normally opened contact KM02-2 on the stand-by power supply output line 3 between stand-by power supply and three utmost point main contacts KM02-0, form stand-by power supply working condition indication loop.Particularly, this loop is connected on the second phase line B ' and zero line N of stand-by power supply output line 3.When being connected in series fuse F U06 and change over switch SA02 in the loop at second ac contactor coil KM02 place; The be connected in series end in loop of the indicator light HL04 and the second A.C. contactor normally opened contact KM02-2 is connected on the node between fuse HL04 and the change over switch SA02, and the other end connects zero line N.
The utility model also is equipped with lead-in circuit breaker QF01 on described three-phase alternating current main power source output line 1, when maintenance, can play the power-off protection effect.In addition, plug into after fuse F U01 and indicator light HL01 are connected in series between the first phase line A and zero line N on the main power source output line 1, form main power source state indication loop.
On described three-phase alternating current stand-by power supply output line 3, also be equipped with lead-in circuit breaker QF02, when maintenance, can play the power-off protection effect.In addition, plug into after fuse F U05 and indicator light HL03 are connected in series between the third phase line C ' and zero line N on the stand-by power supply output line 3, form stand-by power supply state indication loop.
Below basic status and principle during the work of summary the utility model:
During the utility model operate as normal, lead-in circuit breaker QF01 on the three-phase alternating current main power source output line 1 and the change over switch SA01 in the main power source control circuit 2 are in closure state; Lead-in circuit breaker QF02 on the three-phase alternating current stand-by power supply output line 3 and the change over switch SA02 in the stand-by power supply control circuit 4 also are in closure state.
When main power source normally uses; On the three-phase alternating current main power source output line 1; Indicator light HL01 lights, and expression main power source output line 1 has electricity, auxiliary relay coil KA01 energising; Its normally opened contact KA01-1 in main power source control circuit 2 is closed, and the normally-closed contact KA01-2 in stand-by power supply control circuit 4 opens; Simultaneously three-phase alternating current stand-by power supply output line 3 also; Indicator light HL03 lights, and expression stand-by power supply output line 3 has electricity, but owing to the auxiliary relay normally-closed contact KA01-2 in the second ac contactor coil KM02 loop is opened; So the second ac contactor coil KM02 must not; Normally-closed contact KM02-1 in its main power source control circuit 2 still remains closed normality, first ac contactor coil KM01 loop energising this moment, and this contactor coil KM01 gets electric back adhesive three utmost point main contacts KM01-0; Thereby cause main power source output line 1 to connect load electrical network 5, main power source is to 5 power supplies of load electrical network.This moment, the first A.C. contactor normally opened contact KM01-1 was closed in addition, and indicator light HL02 lights, and the operating state that the expression main power source is inserted is normal.
When the main power source abnormal power-down; Three-phase alternating current main power source output line 1 dead electricity; The HL01 indicator light extinguishes, and its normally opened contact KA01-1 and normally-closed contact KA01-2 recover often to open and normally closed normality after the auxiliary relay coil KA01 dead electricity in main power source control circuit 2, at this moment the first ac contactor coil KM01 loop dead electricity; Make its three utmost points main contacts KM01-0 break off being connected of main power source output line 1 and load electrical network after this contactor coil KM01 dead electricity; Its normally opened contact KM01-1 and normally-closed contact KM01-2 recover often to open and normally closed normality, and the HL02 indicator light extinguishes, and the expression main power source gets into off-state; Simultaneously; The loop energising at the second ac contactor coil KM02 place in stand-by power supply control circuit 4, this contactor coil KM02 gets electric its three utmost points main contacts of back adhesive KM02-0, makes stand-by power supply output line 3 connect load electrical network 5; Thereby cause stand-by power supply to 5 power supplies of load electrical network; Meanwhile, the second A.C. contactor normally opened contact KM02-2 in the stand-by power supply control circuit 4 is closed, and indicator light HL04 lights; The operating state that the expression stand-by power supply is inserted is normal, and so far whole duplicate supply transfer process finishes.

Claims (9)

1. double-power supply switching device; Comprise three-phase alternating current main power source output line and three-phase alternating current stand-by power supply output line; Separately phase line, zero line is docked with corresponding phase line, zero line on the load electrical network in this main power source output line and the stand-by power supply output line, it is characterized in that:
Be equipped with the main power source control circuit on the main power source output line, be equipped with the stand-by power supply control circuit on the stand-by power supply output line,
Described main power source control circuit comprises first A.C. contactor and auxiliary relay; Three utmost point main contactss of this first A.C. contactor place on the main power source output line between main power source and the load electrical network, on the main power source output line between main power source and three utmost point main contactss, are connected respectively
An auxiliary relay coil working loop;
A loop that is connected in series by first ac contactor coil, auxiliary relay normally opened contact, the second A.C. contactor normally-closed contact;
And loop that is connected in series by the indicator light and the first A.C. contactor normally opened contact;
Described stand-by power supply control circuit comprises second A.C. contactor; Three utmost point main contactss of this second A.C. contactor place on the stand-by power supply output line between stand-by power supply and the load electrical network, on the stand-by power supply output line between stand-by power supply and three utmost point main contactss, are connected respectively
A loop that is connected in series by second ac contactor coil, the first A.C. contactor normally-closed contact, auxiliary relay normally-closed contact;
And loop that is connected in series by the indicator light and the second A.C. contactor normally opened contact.
2. a kind of double-power supply switching device according to claim 1 is characterized in that: described auxiliary relay coil working loop is connected on first phase line and third phase line of main power source output line.
3. a kind of double-power supply switching device according to claim 1; It is characterized in that: the described loop that is connected in series by first ac contactor coil, auxiliary relay normally opened contact, the second A.C. contactor normally-closed contact is connected on second phase line and zero line of main power source output line, and the loop that is connected in series by the indicator light and the first A.C. contactor normally opened contact also is connected on second phase line and zero line of main power source output line.
4. a kind of double-power supply switching device according to claim 1; It is characterized in that: the described loop that is connected in series by second ac contactor coil, the first A.C. contactor normally-closed contact, auxiliary relay normally-closed contact is connected on second phase line and zero line of stand-by power supply output line, and the loop that is connected in series by the indicator light and the second A.C. contactor normally opened contact also is connected on second phase line and zero line of stand-by power supply output line.
5. a kind of double-power supply switching device according to claim 1 is characterized in that: two fuses that are connected in series respectively of the auxiliary relay coil two ends in the described auxiliary relay coil working loop.
6. a kind of double-power supply switching device according to claim 1; It is characterized in that: described by first ac contactor coil, auxiliary relay normally opened contact, the second A.C. contactor normally-closed contact the be connected in series end that connects phase line in the loop also be connected in series respectively a fuse and a change over switch; The be connected in series end in loop of the indicator light and the first A.C. contactor normally opened contact is connected between fuse and the change over switch, and the other end connects zero line.
7. a kind of double-power supply switching device according to claim 1; It is characterized in that: an end that connects phase line in the described loop that is connected in series by second ac contactor coil, the first A.C. contactor normally-closed contact, auxiliary relay normally-closed contact also be connected in series respectively a fuse and a change over switch; The be connected in series end in loop of the indicator light and the second A.C. contactor normally opened contact is connected between fuse and the change over switch, and the other end connects zero line.
8. a kind of double-power supply switching device according to claim 1 is characterized in that: also be equipped with lead-in circuit breaker on the described three-phase alternating current main power source output line, and the loop between phase, zero line of plugging into after being connected in series by fuse and indicator light.
9. a kind of double-power supply switching device according to claim 1 is characterized in that: also be equipped with lead-in circuit breaker on the described three-phase alternating current stand-by power supply output line, and the loop between phase, zero line of plugging into after being connected in series by fuse and indicator light.
CN2011204692836U 2011-11-23 2011-11-23 Dual-power switching device Expired - Fee Related CN202395514U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011204692836U CN202395514U (en) 2011-11-23 2011-11-23 Dual-power switching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011204692836U CN202395514U (en) 2011-11-23 2011-11-23 Dual-power switching device

Publications (1)

Publication Number Publication Date
CN202395514U true CN202395514U (en) 2012-08-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011204692836U Expired - Fee Related CN202395514U (en) 2011-11-23 2011-11-23 Dual-power switching device

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104701840A (en) * 2015-03-12 2015-06-10 杭州德洛电力设备有限公司 Intelligent three-power automatic transfer switch
CN104953703A (en) * 2015-07-03 2015-09-30 国家电网公司 Double-power-supply control box with anti-misoperation function
CN105958633A (en) * 2016-06-22 2016-09-21 中航太克(厦门)电力技术股份有限公司 Two-way power supply automatic switching power supply circuit
CN106451689A (en) * 2016-12-15 2017-02-22 南通华夏飞机工程技术股份有限公司 Supply circuit of direct current power vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104701840A (en) * 2015-03-12 2015-06-10 杭州德洛电力设备有限公司 Intelligent three-power automatic transfer switch
CN104953703A (en) * 2015-07-03 2015-09-30 国家电网公司 Double-power-supply control box with anti-misoperation function
CN105958633A (en) * 2016-06-22 2016-09-21 中航太克(厦门)电力技术股份有限公司 Two-way power supply automatic switching power supply circuit
CN106451689A (en) * 2016-12-15 2017-02-22 南通华夏飞机工程技术股份有限公司 Supply circuit of direct current power vehicle
CN106451689B (en) * 2016-12-15 2018-07-27 南通华夏飞机工程技术股份有限公司 A kind of power supply circuit of DC power supply vehicle

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120822

Termination date: 20191123