CN202405781U - Automatic three-phase/single-phase power supply switching device for special alternating-current equipment - Google Patents
Automatic three-phase/single-phase power supply switching device for special alternating-current equipment Download PDFInfo
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- CN202405781U CN202405781U CN2011204898400U CN201120489840U CN202405781U CN 202405781 U CN202405781 U CN 202405781U CN 2011204898400 U CN2011204898400 U CN 2011204898400U CN 201120489840 U CN201120489840 U CN 201120489840U CN 202405781 U CN202405781 U CN 202405781U
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Abstract
The utility model discloses an automatic three-phase/single-phase power supply switching device for special alternating-current equipment. The device comprises three-phase connecting wires connected between an equipment alternating-current power supply incoming terminal and an equipment alternating-current switch, and an alternating-current contactor; the three-phase connecting wires are divided into corresponding incoming connecting wires and outgoing connecting wires, wherein two-phase incoming connecting wires and two-phase outgoing connecting wires are separated by movable contacts and normally open stationary contacts of the alternating-current contactor, a coil of the contactor is connected to a ground wire and one of the two-phase incoming connecting wires, so, when the equipment alternating-current power supply incoming terminal is connected with a one-phase power supply, no current passes through the coil, the movable contacts and the normally open stationary contacts are not in contact and one-way power supply is formed; and when the equipment alternating-current power supply incoming terminal is connected with a three-phase power supply, current passes through the coil, the movable contacts and the normally open stationary contacts are in contact and the three-phase power supply is formed. Therefore, equipment power supply access manner does not need to be changed when the equipment alternating-current power supply access manner is not matched with power supply conditions or power supply demands and reformation cost and inconvenience can be avoided.
Description
Technical field
The utility model relates to the switching of three-phase and single-phase ac power supply, and specifically three phase supply or the single phase power supply to special alternating current equipment switches and access automatically.
Background technology
As everyone knows; The high power AC load should be adopted the mode of three phase supply as far as possible; And make that as far as possible the power consumption of threephase load is in a basic balance in the supply line, to guarantee the current balance type of three-phase power line, reduce the failure rate of supply line and improve the fail safe of supply line.
For some special alternating current equipment, its AC load has a plurality of separate single phase alternating current (A.C.) loads by inside and constitutes, and the equipment total power consumption is thousands of watts magnitude.Special alternating current equipment like this with the power supply access way of three-phase alternating current, can keep the three-phase equilibrium of supply line; But with the formation of its total power consumption and AC load, also more limited even adopt the power supply access way of single phase alternating current (A.C.) to the influence that the imbalance of supply line produces, only do not have the restriction that can the three-phase alternating current power supply inserts.Yet, generally speaking, being the balanced feeding circuit, the Alternating Current Power Supply of this type of special installation is main with the access way that the three-phase alternating current power supply is provided, only if customization requires to be the access way of single-phase ac power supply.
When said special installation possessed the access way of three-phase alternating current power supply, if the place of operation possesses three-phase alternating current power supply access conditions, equipment just can move after directly inserting the three-phase alternating current power supply by it power supply access way that possesses; If only there is the single-phase ac power supply circuit place of operation, the three-phase alternating current power supply can't be provided, promptly the power supply access way of equipment and actual power condition do not match, and equipment can't insert operation.Ac power supply line in the existing equipment place of operation exists under the unbalance situation, also need on certain of ac power supply line is single-phase, insert the alternating current equipment of single phase power supply access way sometimes, so that unbalance supply line is adjusted.The special installation that possesses the access way of three-phase alternating current power supply requires not match because the power supply access way of its equipment and actual power insert, and also can't insert operation.
In addition, when said special installation possessed the access way of single-phase ac power supply, if the place of operation only provides the single phase power supply access conditions, equipment just can move after directly inserting single-phase ac power supply by it power supply access way that possesses; If the place of operation has three-phase alternating current supply line, certain of required Alternating Current Power Supply is single-phase just can be moved though can equipment be inserted, and will produce certain imbalance influence this moment to the three-phase alternating current power supply of original balance.
The special installation that possesses three-phase alternating current power supply access way; Its power supply access way and actual single phase power supply conditioned disjunction single phase power supply insert when requiring not match; For making equipment operation; Must transform the original three-phase alternating current power supply of equipment access way, make it to adapt to the access of single-phase ac power supply, can normally move; The special installation that possesses the single-phase ac power supply access way for keeping the requirement of operational outfit under the three-phase alternating current supply line equilibrium condition, also must be transformed the original single-phase ac power supply access way of equipment, makes it to adapt to the access of three-phase alternating current power supply.The transformation of described power devices access way owing to relate to special installation inner load allocating and inner distribution thereof, can only or move on-the-spot professional by the equipment supplier in the device fabrication place and implement.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, provides a kind of and can discern and give a kind of device that switches access automatically for special installation provides three phase supply and single phase power supply to insert.When inserting three-phase alternating current supply line, this device runs on the three-phase alternating current power supply with special installation; When inserting the single-phase ac power supply circuit, this device runs on single-phase ac power supply with special installation.Cancelled the retrofit work that must carry out the power devices access way because equipment Alternating Current Power Supply access way and condition of power supply or power reguirements do not match, expense and the inconvenience of avoiding retrofit work to produce.
The utility model solves the technical scheme that its technical problem adopted: a kind of device that special alternating current equipment is carried out three-phase/single phase poaer supply automatic switchover comprises being connected the three-phase connecting line between equipment Alternating Current Power Supply access interface and the equipment alternating-current switch and being connected the ground wire connecting line between equipment Alternating Current Power Supply access interface and the equipment; Also comprise an A.C. contactor, this A.C. contactor comprises coil, moving contact, normally closed fixed contact and Chang Kai fixed contact; In the said three-phase connecting line, the wiring that whenever links to each other is split as corresponding access connecting line respectively and picks out connecting line; Each end that three-phase inserts connecting line is connected with the corresponding end of equipment Alternating Current Power Supply access interface respectively; First insert connecting line mutually the other end be connected with the normally closed fixed contact of A.C. contactor, second inserts each other end that connecting line and third phase insert connecting line mutually often opens fixed contact with two of A.C. contactor respectively and is connected; Each end that three-phase picks out connecting line is connected with the corresponding end of equipment alternating-current switch respectively; First pick out connecting line mutually the other end be connected with the normally closed fixed contact of A.C. contactor, second picks out connecting line mutually is connected with two moving contacts of A.C. contactor respectively with each other end that third phase picks out connecting line; One end of coil is connected in the ground wire connecting line, and the other end of coil and second inserts connecting line mutually or third phase access connecting line is connected.
The utility model is that cross-over connection is between equipment Alternating Current Power Supply access interface and equipment alternating-current switch; Equipment Alternating Current Power Supply access interface has A, B, the C end end that is connected with N that is connected usually; Suppose that the first continuous wiring is to connect the A phase, certainly, also can be set at the first continuous wiring is to connect B phase or C phase; Then first insert connecting line mutually a head joint equipment Alternating Current Power Supply access interface A phase; The other end is connected with the normally closed fixed contact of A.C. contactor, and first picks out a head joint equipment alternating-current switch of connecting line mutually, and the other end is connected with the normally closed fixed contact of A.C. contactor; Like this, first wiring that links to each other is actually to be connected between equipment Alternating Current Power Supply access interface A and the equipment alternating-current switch and with the normally closed fixed contact of A.C. contactor and is connected.Second link to each other wiring and the third phase connecting line then is that two through A.C. contactor often open fixed contact and two moving contacts separate respectively; In fact; B phase, the C that has just caused equipment Alternating Current Power Supply access interface is connected with the equipment alternating-current switch through after often the opening fixed contact and moving contact separates of A.C. contactor again; The coil of A.C. contactor then is connected between B phase (or C phase) and the Alternating Current Power Supply ground wire (zero line); The Alternating Current Power Supply ground wire is directly to be connected with equipment, and alternating-current switch is connected with apparatus of load.
When single-phase ac power supply; Single-phase alternating current is connected to A port and ground port; Do not have the alternating current access mutually because B reaches C mutually, the coil of the relay of A.C. contactor is failure to actuate, the single-phase electricity that the A port inserts; Except that the path incoming transport switch that directly is connected, also via the normally closed fixed contact incoming transport switch of contactor with the equipment alternating-current switch.When alternating-current switch was closed, the single-phase alternating current that the A port inserts was pressed single-phase three road access devices through alternating-current switch.
When three-phase alternating current is supplied power; Three-phase alternating current connects and is connected to A phase, B phase, C respectively and reaches the ground port mutually; Except that A phase access interface directly is connected with the equipment alternating-current switch and inserts the A cross streams electricity; The coil of the relay of A.C. contactor moves owing to the power supply of B phase (or C phase) inserts, contactor often to open fixed contact closed with moving contact, feasiblely be connected to the B that B reaches C phase port mutually and reach the alternating-current switch of often opening fixed contact access device of C cross streams electricity mutually through contactor.When alternating-current switch was closed, the three-phase alternating current that the three-phase alternating current port inserts was pressed three-phase three road access devices through alternating-current switch.
The beneficial effect of the utility model is; Owing to having adopted a newly-increased A.C. contactor and the wiring that whenever links to each other in the three-phase connecting line being split into corresponding access connecting line respectively and picks out connecting line; And with two the inserting connecting line mutually and picking out connecting line and separate wherein in the three-phase connecting line with the moving contact and the Chang Kai fixed contact of A.C. contactor; And two of the coil of the relay of A.C. contactor is terminated at one of them that ground wire and said two inserts connecting line mutually; Make when equipment Alternating Current Power Supply access interface inserts single phase poaer supply; The coil non-transformer of relay passes through, and the moving contact of A.C. contactor does not contact with the Chang Kai fixed contact, forming device Alternating Current Power Supply access interface to equipment alternating-current switch single phase power supply; And when equipment Alternating Current Power Supply access interface inserts three phase mains; The coil of relay has power supply to pass through, and the moving contact of A.C. contactor and Chang Kai fixed contact contact, forming device Alternating Current Power Supply access interface to equipment alternating-current switch three phase supply; Cancelled the retrofit work that must carry out the power devices access way because equipment Alternating Current Power Supply access way and condition of power supply or power reguirements do not match, expense and the inconvenience of avoiding retrofit work to produce.
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain; But the utility model a kind of carries out the device that three-phase/single phase poaer supply automaticallyes switch to special alternating current equipment is not limited to embodiment.
Description of drawings
Fig. 1 is the schematic circuit of the embodiment of the utility model.
Embodiment
Embodiment; Referring to shown in Figure 1; The a kind of of the utility model carries out the device that three-phase/single phase poaer supply automaticallyes switch to special alternating current equipment, comprises being connected the three-phase connecting line between equipment Alternating Current Power Supply access interface 1 and the equipment alternating-current switch 3 and being connected the ground wire connecting line 10 between equipment Alternating Current Power Supply access interface and the equipment; Also comprise an A.C. contactor 2, this A.C. contactor 2 comprises coil 21, moving contact 22, normally closed fixed contact 23 and Chang Kai fixed contact 24; In the said three-phase connecting line; Whenever the wiring that links to each other is split as corresponding access connecting line respectively and picks out connecting line; Promptly; First wiring that links to each other is split as first and inserts connecting line 11 and first mutually and pick out connecting line 31, the second wiring that link to each other mutually and be split as second and insert connecting line 12 mutually and pick out connecting line 32 mutually with second, and the third phase connecting line is split as third phase access connecting line 13 and third phase picks out connecting line 33; Equipment Alternating Current Power Supply access interface has A, B, the C end end that is connected with N that is connected usually, supposes that first wiring that links to each other is to connect the A phase, and certainly, also can be set at first wiring that links to each other is to connect B phase or C phase; Each end that three-phase inserts connecting line is connected with the corresponding end of equipment Alternating Current Power Supply access interface respectively; Promptly; First inserts the A phase that connecting line 11 connects equipment Alternating Current Power Supply access interface 1 mutually; Second inserts the B phase that connecting line 12 connects equipment Alternating Current Power Supply access interface 1 mutually, and third phase inserts the C phase that connecting line 13 connects equipment Alternating Current Power Supply access interface 1; First insert connecting line 11 mutually the other end be connected with the normally closed fixed contact 23 of A.C. contactor, second inserts each other end that connecting line 12 and third phase insert connecting line 13 mutually often opens fixed contact 24 with two of A.C. contactor respectively and is connected; Each end that three-phase picks out connecting line is connected with the corresponding end of equipment alternating-current switch respectively, promptly first picks out mutually that connecting line 31, second picks out connecting line 32 mutually, third phase picks out connecting line 33 and is connected with the corresponding end of equipment alternating-current switch respectively; First pick out connecting line 31 mutually the other end be connected with the normally closed fixed contact 23 of A.C. contactor, second picks out connecting line 32 mutually is connected with two moving contacts 22 of A.C. contactor respectively with each other end that third phase picks out connecting line 33; One end of coil 21 is connected in the ground wire connecting line 10, and the other end of coil and third phase insert connecting line 13 and be connected, and certainly, also can be to insert connecting line 12 mutually and be connected with second.
The utility model is that cross-over connection is between equipment Alternating Current Power Supply access interface 1 and equipment alternating-current switch 3; First inserts the A phase of a head joint equipment Alternating Current Power Supply access interface 1 of connecting line 11 mutually; The other end is connected with the normally closed fixed contact 23 of A.C. contactor; First picks out a head joint equipment alternating-current switch 3 of connecting line 31 mutually; The other end is connected with the normally closed fixed contact 23 of A.C. contactor, and like this, first wiring that links to each other is actually to be connected between equipment Alternating Current Power Supply access interface A and the equipment alternating-current switch 3 and with the normally closed fixed contact 23 of A.C. contactor and is connected.Second link to each other wiring and the third phase connecting line then is that two through A.C. contactor often open fixed contact 24 and two moving contacts 22 separate respectively; In fact; B phase, the C that has just caused equipment Alternating Current Power Supply access interface is connected with equipment alternating-current switch 3 through after often the opening fixed contact 24 and moving contact 22 separates of A.C. contactor again; The coil 21 of A.C. contactor then is connected between C and the Alternating Current Power Supply ground wire 10 (zero line); Alternating Current Power Supply ground wire 10 is directly to be connected with equipment 4, and alternating-current switch 3 is connected with equipment 4 loads.
When equipment inserted single-phase electricity, the L of single-phase electricity reached A port and the N port that N is connected to Alternating Current Power Supply access interface 1 mutually respectively mutually.Coil 21 non-transformers of the relay of A.C. contactor insert and are failure to actuate at this moment; 2 moving contacts 22 of A.C. contactor are kept and being connected of two normally closed fixed contacts 23; Two normally closed fixed contacts 23 link together; Because two normally-closed contacts 23 are connected with the A port, it is direct with outside the A road of alternating-current switch 3 is connected to make that the L of single-phase alternating current of A port access is divided by, and also the moving contact 22 via contactor links to each other with the B road and the C road of alternating-current switch 3 respectively.When alternating-current switch 3 closures, single-phase alternating current access device 4.
When equipment inserted three-phase electricity, the A phase of three-phase electricity, B phase, C reached A, B, C and the N port that N distinguishes incoming transport power supply access interface 1 mutually mutually.This moment A.C. contactor relay coil 21 because of C phase power supply insert electronic work; Make 2 moving contacts of contacts of contactor 22 be connected with normally opened contact respectively; Directly with the A road of alternating-current switch 3 is connected, B reaches C and links to each other with the B road and the C road of alternating-current switch 3 via the moving contact of A.C. contactor respectively mutually the A cross streams electricity that inserts except that the A port mutually.When alternating-current switch 3 closures, three-phase alternating current access device 4.
The foregoing description only is used for further specifying a kind of of the utility model special alternating current equipment is carried out the device that three-phase/single phase poaer supply automaticallyes switch; But the utility model is not limited to embodiment; Every technical spirit according to the utility model all falls in the protection range of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did.
Claims (1)
1. the device that special alternating current equipment is carried out three-phase/single phase poaer supply automatic switchover comprises being connected the three-phase connecting line between equipment Alternating Current Power Supply access interface and the equipment alternating-current switch and being connected the ground wire connecting line between equipment Alternating Current Power Supply access interface and the equipment; It is characterized in that:
Also comprise an A.C. contactor, this A.C. contactor comprises coil, moving contact, normally closed fixed contact and Chang Kai fixed contact; In the said three-phase connecting line, the wiring that whenever links to each other is split as corresponding access connecting line respectively and picks out connecting line; Each end that three-phase inserts connecting line is connected with the corresponding end of equipment Alternating Current Power Supply access interface respectively; First insert connecting line mutually the other end be connected with the normally closed fixed contact of A.C. contactor, second inserts each other end that connecting line and third phase insert connecting line mutually often opens fixed contact with two of A.C. contactor respectively and is connected; Each end that three-phase picks out connecting line is connected with the corresponding end of equipment alternating-current switch respectively; First pick out connecting line mutually the other end be connected with the normally closed fixed contact of A.C. contactor, second picks out connecting line mutually is connected with two moving contacts of A.C. contactor respectively with each other end that third phase picks out connecting line; One end of coil is connected in the ground wire connecting line, and the other end of coil and second inserts connecting line mutually or third phase access connecting line is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204898400U CN202405781U (en) | 2011-11-30 | 2011-11-30 | Automatic three-phase/single-phase power supply switching device for special alternating-current equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204898400U CN202405781U (en) | 2011-11-30 | 2011-11-30 | Automatic three-phase/single-phase power supply switching device for special alternating-current equipment |
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| Publication Number | Publication Date |
|---|---|
| CN202405781U true CN202405781U (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204898400U Expired - Fee Related CN202405781U (en) | 2011-11-30 | 2011-11-30 | Automatic three-phase/single-phase power supply switching device for special alternating-current equipment |
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| CN (1) | CN202405781U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109416569A (en) * | 2016-07-13 | 2019-03-01 | 三菱电机株式会社 | Non voltage output and the switching circuit for having voltage output |
| CN110275050A (en) * | 2018-03-13 | 2019-09-24 | 株洲中车时代电气股份有限公司 | A kind of network pressure mutation device and its control method |
| WO2021012224A1 (en) * | 2019-07-24 | 2021-01-28 | 深圳欣锐科技股份有限公司 | Three-phase charging circuit compatible with single-phase input, and related device |
-
2011
- 2011-11-30 CN CN2011204898400U patent/CN202405781U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109416569A (en) * | 2016-07-13 | 2019-03-01 | 三菱电机株式会社 | Non voltage output and the switching circuit for having voltage output |
| CN109416569B (en) * | 2016-07-13 | 2021-10-29 | 三菱电机株式会社 | Non-voltage output and voltage output switching circuit |
| CN110275050A (en) * | 2018-03-13 | 2019-09-24 | 株洲中车时代电气股份有限公司 | A kind of network pressure mutation device and its control method |
| CN110275050B (en) * | 2018-03-13 | 2021-10-26 | 株洲中车时代电气股份有限公司 | Network voltage mutation device and control method thereof |
| WO2021012224A1 (en) * | 2019-07-24 | 2021-01-28 | 深圳欣锐科技股份有限公司 | Three-phase charging circuit compatible with single-phase input, and related device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20171130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |