CN201708581U - Double-power-supply automatic switching loop - Google Patents
Double-power-supply automatic switching loop Download PDFInfo
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- CN201708581U CN201708581U CN2010201994702U CN201020199470U CN201708581U CN 201708581 U CN201708581 U CN 201708581U CN 2010201994702 U CN2010201994702 U CN 2010201994702U CN 201020199470 U CN201020199470 U CN 201020199470U CN 201708581 U CN201708581 U CN 201708581U
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Abstract
The utility model discloses a double-power-supply switching loop, which comprises two contactors K1 and K2, a contactor mechanical interlocking device U1, two relays K3 and K4 and an installing plate U2. The utility model is characterized in that the two contactors K1 and K2 are arranged on the installing plate U2, the input end of the contactor K1 is connected with a first path of three-phase AC power supplies A1, B1 and C1, the input end of the contactor K2 is connected with a second path of three-phase AC power supplies A2, B2 and C2, the output of the two contactors are in short circuit connection, in addition, the output MA, MB and MC is connected with load equipment, and the mechanical interlocking device U1 is arranged between the two contactors, and ensures the suction of the electromagnetic structures of the two contactors is not at the same time. The utility model has the dual interlocking function of the electric loop and the mechanical structure, and effectively avoids the double-power short circuit problem caused by various reasons.
Description
Technical field
The utility model relates to a kind of reliable duplicate supply automatic switchover loop, belongs to electrical technology field.
Background technology
In order to improve the reliability of load equipment power supply, can provide two to overlap independently power supply for a load equipment, two cover power supplys need select one of them power supply as main power source through specific loop, use for actual, other one road power supply automatically switches to the stand-by power supply power supply as standby when main power source is unusual.
Present disclosed power-supply switching method has following two kinds of realizations:
1. the design specialized controller uses sample circuit that power supply is sampled, thereby judges whether power supply is normal.Controller is by specific logic, according to the power supply situation, and the control switch motor, motor-driven mechanical switch deciliter is realized the selection of two cover power supplys.This method control loop is disturbed easily, to application environmental requirement height, and the loop complexity, powerful, but the cost height costs an arm and a leg.And, owing to need the neutral point and the controller power source of three phase mains, limited its range of application and reliability to a certain extent.
2. adopt relay to carry out power supply and detect, utilize the operation voltage Characteristics Detection voltage of relay line bag whether normal, and adopt contactor to carry out the power supply switching, control the throwing of power supply by the adhesive of control relay and move back.This circuit theory is simple, realizes that simply adaptability is strong, but has only adopted the mode of electric blocking, can not avoid the two-way power supply to be short-circuited by contactor fully, has hidden danger.
The utility model content
Technical problem to be solved in the utility model provides a kind of duplicate supply automatic switchover loop, the duplicate supply short circuit problem that can effectively avoid a variety of causes to cause.
Technical problem to be solved in the utility model provides that a kind of loop is simple, the duplicate supply automatic switchover loop of strong anti-interference performance.
For solving the problems of the technologies described above, the utility model provides a kind of duplicate supply switching circuit, comprise two contactor K1, K2, a contactor mechanical interlock U1, two relay K 3, K4 and mounting panel U2, it is characterized in that: two contactor K1, K2 are installed on the mounting panel U2, the input termination first via three-phase alternating-current supply A1 of contactor K1, B1, C1, the input termination No. the second three-phase alternating-current supply A2 of contactor K2, B2, C2, the output short circuit of two contactors, and output MA, MB, MC connect load equipment; Be provided with between two contactors and guarantee the not mechanical interlock U1 of adhesive simultaneously of two contactor electromagnetic and mechanical structures.
Aforesaid duplicate supply switching circuit is characterized in that: relay K 3 line bags are connected on first via three-phase alternating-current supply A1, the C1, and relay K 4 line bags are connected on No. the second three-phase alternating-current supply A2, the C2; Contactor K1 line bag links to each other with the normally closed node of contactor K2 and an end of often opening node of relay K 3 respectively, and the normally closed node of contactor K2 links to each other with first via three-phase alternating-current supply B1, C1 respectively with the other end of often opening node of relay K 3; Contactor K2 line bag links to each other with the normally closed node of contactor K1 and an end of often opening node of relay K 4 respectively, and the normally closed node of contactor K1 links to each other with No. the second three-phase alternating-current supply B2, C2 respectively with the other end of often running node of relay K 4.
Aforesaid duplicate supply switching circuit is characterized in that: the two-way power supply also comprises neutral point N1, N2, and neutral point N1, the N2 of two-way power supply exports MN after directly linking to each other.
The beneficial effect that the utility model reached: the utility model possesses the dual interlock function of electric loop and mechanical structure, the duplicate supply short circuit problem of effectively avoiding a variety of causes to cause; Detect sensitivity, the power supply switch speed is fast; Detect control loop directly from the major loop power taking, do not need the add-on device power supply, the unessential neutral point (the N utmost point) of three phase mains, contactor can be installed combined and instant according to the free type selecting of current class, has very strong versatility; The loop is simple, strong anti-interference performance.
Description of drawings
Fig. 1 is the electrical principle loop diagram;
Fig. 2 is the contactor scheme of installation.
Embodiment
With reference to the accompanying drawings and in conjunction with example the utility model is described in further detail.But the utility model is not limited to given embodiment.
As depicted in figs. 1 and 2, the major loop mode of connection of the present utility model is:
The input of contactor K1 meets first via three-phase alternating-current supply A1, B1, C1, and the input of contactor K2 meets No. the second three-phase alternating-current supply A2, B2, C2, the output short circuit of two contactors, and output MA, MB, MC connect load equipment.Relay K 3 line bags are connected on first via three-phase alternating-current supply A1, the C1, and relay K 4 line bags are connected on No. the second three-phase alternating-current supply A2, the C2.Contactor K1 line bag links to each other with the normally closed node of contactor K2 and an end of often opening node of relay K 3 respectively, and the normally closed node of contactor K2 links to each other with first via three-phase alternating-current supply B1, C1 respectively with the other end of often opening node of relay K 3.Contactor K2 line bag links to each other with the normally closed node of contactor K1 and an end of often opening node of relay K 4 respectively, the normally closed node of contactor K1 links to each other with No. the second three-phase alternating-current supply B2, C2 respectively with the other end of often running node of relay K 4, and neutral point N1, the N2 of two-way power supply exports MN after directly linking to each other.
The mechanical structure mode is:
Two contactor K1, K2 are installed on the mounting panel U2, and mechanical interlock U1 is arranged between the contactor, and mechanical interlock U1 guarantees two not adhesives simultaneously of contactor electromagnetic and mechanical structure.
Duplicate supply is the three-phase four-wire system power supply with neutral point, and the input power supply is A1, B1, C1, N1 and A2, B2, C2, N2, is MA, MB, MC, MN through the out-put supply that switches.
Concrete working method of the present utility model is:
When powering on operation, the power supply that at first send electricity is as main operation power supply, an other cover power supply is as stand-by power supply, to send power supply one earlier is example: after power supply one send electricity, relay K 3 line bags get electronic work, often open node 13,14 closures, this moment, contactor K2 line bag must not, normally closed node 21,22 is failure to actuate, by 13,14 nodes of relay K 3 and 21,22 nodes of contactor K2, contactor K1 line Bao Dedian, main contact 1 and 2,3 and 4,5 and 6 closures, this road power supply is sent, as out-put supply; Simultaneously, normally closed node 21,22 actions of contactor K1 disconnect, can guarantee that contactor K2 line bag must not, and displacement takes place in mechanical interlock U1 after the K1 action, contactor K2 akinesia on mechanical mechanism, thereby electric and guarantee aspect mechanical two that the two-way power supply does not drop into simultaneously.At this moment, send power supply two again, relay K 4 line bags get electronic work, often open node 13,14 closures, because the normally closed node 21,22 of contactor K1 disconnects, contactor K2 line bag can not get electric, thereby this cover power supply becomes stand-by power supply.
If power supply one breaks down, as A1 phase phase shortage takes place, then relay K 3 dead electricity are often opened node 13,14 and are disconnected, contactor K1 line bag dead electricity, and main contact is opened; Normally closed node 21,22 closures of contactor K1, contactor K2 line Bao Dedian, the main contact closure is sent this road power supply, as out-put supply.If B1 or C1 phase phase shortage take place, then contactor K1 line bag loses point, power supply in like manner will take place switch, and the assurance power supply is reliably supplied.
Selecting contactor K1, K2 in this example is the LC1D65Q7 of Schneider, and contactor mechanical interlock U1 is the LA9D50978 of Schneider, and relay K 3, K4 are the 3TH8244/0XQ0 of Siemens, and mounting panel U2 is self-control.This scheme comes into operation on state China Suizhong Power Plant 1000MW turbo generator set excitation system.
More than the utility model is disclosed with preferred embodiment, so it is not in order to restriction the utility model, all employings are equal to replaces or technical scheme that the equivalent transformation mode is obtained, all drops within the protection range of the present utility model.
Claims (3)
1. duplicate supply switching circuit, comprise two contactor K1, K2, a contactor mechanical interlock U1, two relay K 3, K4 and mounting panel U2, it is characterized in that: two contactor K1, K2 are installed on the mounting panel U2, the input termination first via three-phase alternating-current supply A1 of contactor K1, B1, C1, the input termination No. the second three-phase alternating-current supply A2 of contactor K2, B2, C2, the output short circuit of two contactors, and output MA, MB, MC connect load equipment; Be provided with between two contactors and guarantee the not mechanical interlock U1 of adhesive simultaneously of two contactor electromagnetic and mechanical structures.
2. duplicate supply switching circuit according to claim 1 is characterized in that: relay K 3 line bags are connected on first via three-phase alternating-current supply A1, the C1, and relay K 4 line bags are connected on No. the second three-phase alternating-current supply A2, the C2; Contactor K1 line bag links to each other with the normally closed node of contactor K2 and an end of often opening node of relay K 3 respectively, and the normally closed node of contactor K2 links to each other with first via three-phase alternating-current supply B1, C1 respectively with the other end of often opening node of relay K 3; Contactor K2 line bag links to each other with the normally closed node of contactor K1, an end of often opening node of relay K 4 respectively, and the normally closed node of contactor K1 links to each other with No. the second three-phase alternating-current supply B2, C2 respectively with the other end of often running node of relay K 4.
3. duplicate supply switching circuit according to claim 1 and 2 is characterized in that: the two-way power supply also comprises neutral point N1, N2, and neutral point N1, the N2 of two-way power supply exports MN after directly linking to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201994702U CN201708581U (en) | 2010-05-21 | 2010-05-21 | Double-power-supply automatic switching loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201994702U CN201708581U (en) | 2010-05-21 | 2010-05-21 | Double-power-supply automatic switching loop |
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| Publication Number | Publication Date |
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| CN201708581U true CN201708581U (en) | 2011-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201994702U Expired - Lifetime CN201708581U (en) | 2010-05-21 | 2010-05-21 | Double-power-supply automatic switching loop |
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| CN (1) | CN201708581U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368632A (en) * | 2011-11-13 | 2012-03-07 | 广州高澜节能技术股份有限公司 | Dual-power switching system |
| CN102563339A (en) * | 2011-12-31 | 2012-07-11 | 北京浩运金能科技有限公司 | Metal hydride hydrogen storing device |
| CN102611189A (en) * | 2012-03-13 | 2012-07-25 | 华为技术有限公司 | Double-power-supply switching device and controlling method thereof |
| WO2013107003A1 (en) * | 2012-01-18 | 2013-07-25 | Cummins Power Generation Ip, Inc. | Transfer switch |
| CN104715972A (en) * | 2015-04-04 | 2015-06-17 | 佛山蓝途科技有限公司 | Double-power-supply automatic changeover switching device |
| CN108313234A (en) * | 2018-03-21 | 2018-07-24 | 无锡德林防务装备股份有限公司 | Open type hydraulic system watertight controlling device for doors |
| CN108565958A (en) * | 2018-04-03 | 2018-09-21 | 淮北矿业股份有限公司 | A kind of three-way power automatic switching control equipment and its working method |
-
2010
- 2010-05-21 CN CN2010201994702U patent/CN201708581U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368632A (en) * | 2011-11-13 | 2012-03-07 | 广州高澜节能技术股份有限公司 | Dual-power switching system |
| CN102368632B (en) * | 2011-11-13 | 2014-03-12 | 广州高澜节能技术股份有限公司 | Dual-power switching system |
| CN102563339A (en) * | 2011-12-31 | 2012-07-11 | 北京浩运金能科技有限公司 | Metal hydride hydrogen storing device |
| CN102563339B (en) * | 2011-12-31 | 2015-09-09 | 北京浩运金能科技有限公司 | A kind of metal hydride hydrogen storage unit |
| WO2013107003A1 (en) * | 2012-01-18 | 2013-07-25 | Cummins Power Generation Ip, Inc. | Transfer switch |
| CN104221249A (en) * | 2012-01-18 | 2014-12-17 | 康明斯发电Ip公司 | Transfer switch |
| CN104221249B (en) * | 2012-01-18 | 2017-05-24 | 康明斯发电Ip公司 | Transfer switch |
| US10326303B2 (en) | 2012-01-18 | 2019-06-18 | Cummins Power Generation Ip, Inc. | Transfer switch |
| CN102611189A (en) * | 2012-03-13 | 2012-07-25 | 华为技术有限公司 | Double-power-supply switching device and controlling method thereof |
| CN104715972A (en) * | 2015-04-04 | 2015-06-17 | 佛山蓝途科技有限公司 | Double-power-supply automatic changeover switching device |
| CN108313234A (en) * | 2018-03-21 | 2018-07-24 | 无锡德林防务装备股份有限公司 | Open type hydraulic system watertight controlling device for doors |
| CN108565958A (en) * | 2018-04-03 | 2018-09-21 | 淮北矿业股份有限公司 | A kind of three-way power automatic switching control equipment and its working method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110112 |
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| CX01 | Expiry of patent term |