CN203504284U - Supply circuit of auxiliary device of large-scale unit - Google Patents
Supply circuit of auxiliary device of large-scale unit Download PDFInfo
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- CN203504284U CN203504284U CN201320553151.0U CN201320553151U CN203504284U CN 203504284 U CN203504284 U CN 203504284U CN 201320553151 U CN201320553151 U CN 201320553151U CN 203504284 U CN203504284 U CN 203504284U
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- contactor
- power
- power supply
- scale unit
- normally opened
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Abstract
The utility model relates to a supply circuit of an auxiliary device of a large-scale unit, and belongs to the technical field of power supplies. The technical scheme is that the supply circuit comprises an uninterruptible power supply (UPS), two alternating current power supplies and two contactors, a control coil of a first contactor is connected with single-phase voltage of a first alternating current power supply through a normally-closed contact of a second contactor, a control coil of the second contactor s connected with single-phase voltage of a second alternating current power supply through a normally-closed contact of a first contactor, a three-phase input end of the UPS is connected with the first alternating current power supply through a main normally-open contact of the first contactor and connected with the second alternating current power supply through a main normally-open contact of the second contactor, and an output end of the UPS is connected with the auxiliary device of the large-scale unit. The supply circuit of the auxiliary device of the large-scale unit combines the UPS with double paths of mutual-switching alternating current power supplies, realizes uninterrupted power supply of the auxiliary device of the large-scale unit, greatly improves power supply reliability of the auxiliary device, thereby effectively preventing shut-down accidents of the large-scale unit, and reducing economic losses of companies.
Description
Technical field
The utility model relates to a kind of for large-scale unit servicing unit provides the circuit of electric energy, can make the large-scale unit still can safe operation when running into instantaneous low-voltage, belongs to power technique fields.
Background technology
Existing large-scale unit auxiliaries (as oil pump) is powered by single channel low-tension supply conventionally; once there is instantaneous low-voltage or other reason and cause low pressure dead electricity in electrical network; unit auxiliaries will quit work, and then causes large-scale compressor emergency shutdown, to enterprise, causes unnecessary economic loss.Therefore the power supply reliability that, how to improve large-scale unit auxiliaries just becomes the problem that relevant technologies personnel face.
Utility model content
The purpose of this utility model is the drawback for prior art, and a kind of power supply circuits of large-scale unit servicing unit are provided, and makes the large-scale unit still can safe operation when running into instantaneous low-voltage.
Problem described in the utility model realizes with following technical proposals:
A kind of power supply circuits of large-scale unit servicing unit, it comprises uninterrupted power supply, two AC power and two contactors, the control coil of the first contactor connects the single-phase voltage of the first AC power through the normally-closed contact of the second contactor, the control coil of the second contactor connects the single-phase voltage of the second AC power through the normally-closed contact of the first contactor, the three-phase input end of described uninterrupted power supply connects the first AC power and connects the second AC power, its output termination large-scale computer group servicing unit through the main normally opened contact of the second contactor through the main normally opened contact of the first contactor.
The power supply circuits of above-mentioned large-scale unit servicing unit, in formation, also comprise two isolating switches, the first isolating switch is arranged between the output of the first AC power and the main normally opened contact of the first contactor, and the second isolating switch is arranged between the output of the second AC power and the main normally opened contact of the second contactor.
The power supply circuits of above-mentioned large-scale unit servicing unit, in formation, also comprise two air circuits, the first air circuit is serially connected between the first isolating switch and the main normally opened contact of the first contactor, and the second air circuit is serially connected between the second isolating switch and the main normally opened contact of the second contactor.
The power supply circuits of above-mentioned large-scale unit servicing unit, in formation, also comprise two AC power relay indicating lights, after the auxiliary normally opened contact of the first AC power relay indicating light and the first contactor is connected in series, connect the single-phase voltage of the first AC power, after the auxiliary normally opened contact of the second AC power relay indicating light and the second contactor is connected in series, connect the single-phase voltage of the second AC power.
The utility model is thrown mutually AC power by uninterrupted power supply and two-way and is combined; realized the uninterrupted power supply of large-scale unit auxiliaries; greatly improve the power supply reliability of servicing unit, thereby effectively avoided the stopping accident of large-scale unit, reduced the suffered economic loss of enterprise.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the electrical schematic diagram of the utility model major loop;
Fig. 2 is the electrical schematic diagram of the first AC power control loop;
Fig. 3 is the electrical schematic diagram of the second AC power control loop.
In figure, each label is: UPS, uninterrupted power supply; Z, large-scale unit servicing unit; QS1, the first isolating switch; QS2, the second isolating switch; QF1, the first air circuit; QF2, the second air circuit; KM1, the first contactor; The main normally opened contact of KM1-1, the first contactor; The normally-closed contact of KM1-2, the first contactor; The auxiliary normally opened contact of KM1-3, the first contactor; KM2, the second contactor; The main normally opened contact of KM2-1, the second contactor; The normally-closed contact of KM2-2, the second contactor; The auxiliary normally opened contact of KM2-3, the second contactor; FU1, the first fuse; FU2, the second fuse; HD1, the first AC power relay indicating light; HD2, the second AC power relay indicating light.
Embodiment
Referring to Fig. 1, the utility model utilizes the main normally opened contact KM1-1 of the first isolating switch QS1, the first air circuit QF1, the first contactor to form a current supply circuit, in parallel with second current supply circuit that the main normally opened contact KM2-1 of the second isolating switch QS2, the second air circuit QF2, the second contactor forms, two current supply circuits jointly form two-way and throw mutually electric supply installation and power to uninterrupted power supply UPS.
Referring to Fig. 2, Fig. 3, the control coil of the first contactor KM1 is connected with the normally-closed contact KM2-2 of the second contactor, and while realizing the second AC power dead electricity, the first AC power drops into power supply automatically; The control coil of the second contactor KM2 is connected with the normally-closed contact KM1-2 of the first contactor, and while realizing the first power supply dead electricity, the second AC power drops into power supply automatically.And by normally-closed contact, connect and realize contactor interlocking with contactor coil in another loop, avoid because two-way supply voltage is different the circulation over-current phenomenon avoidance of appearance.
Referring to Fig. 2, Fig. 3, the utility model is used the first AC power relay indicating light HD1 to connect with the auxiliary normally opened contact KM1-3 of the first contactor, while realizing the first ac power supply, the first AC power relay indicating light HD1 is bright, indication the first AC power work; Use the second AC power relay indicating light HD2 to connect with the auxiliary normally opened contact KM2-3 of the second contactor, while realizing the second ac power supply, the second AC power relay indicating light HD2 is bright, indication the second AC power work.
According to the needs of load Z, UPS can export 380V voltage, also exportable 220V voltage.
The utility model can be the important auxiliary equipment and control appliance of large-scale computer group: as the important auxiliary equipment such as control section, oil pump that exchanges of DCS, PLC dispatch control system, excitation cubicle, important control circuit is powered.This circuit can effectively avoid the auxiliary equipment causing because of reasons such as instantaneous low-voltage, system dead electricity to shut down, and prevents large-scale compressor emergency shutdown; And can be when electric power system be broken down, continue as important auxiliary equipment and the control appliance power supply of large-scale unit, dependent failure data are preserved into control system database, avoid losing because dead electricity causes fault data, for resuming production fast, provide data basis with looking up the fault.
Claims (4)
1. the power supply circuits of a large-scale unit servicing unit, it is characterized in that, it comprises uninterrupted power supply (ups) Unity, two AC power and two contactors, the control coil of the first contactor (KM1) connects the single-phase voltage of the first AC power through the normally-closed contact (KM2-2) of the second contactor, the control coil of the second contactor (KM2) connects the single-phase voltage of the second AC power through the normally-closed contact (KM1-2) of the first contactor, the three-phase input end of described uninterrupted power supply (ups) Unity connects the first AC power and connects the second AC power through the main normally opened contact (KM2-1) of the second contactor through the main normally opened contact (KM1-1) of the first contactor, it exports termination large-scale computer group servicing unit (Z).
2. the power supply circuits of a kind of large-scale unit servicing unit according to claim 1, it is characterized in that, in formation, also comprise two isolating switches, the first isolating switch (QS1) is arranged between the output of the first AC power and the main normally opened contact (KM1-1) of the first contactor, and the second isolating switch (QS2) is arranged between the output of the second AC power and the main normally opened contact (KM2-1) of the second contactor.
3. the power supply circuits of a kind of large-scale unit servicing unit according to claim 2, it is characterized in that, in formation, also comprise two air circuits, the first air circuit is serially connected between the main normally opened contact (KM1-1) of the first isolating switch (QS1) and the first contactor, and the second air circuit is serially connected between the main normally opened contact (KM2-1) of the second isolating switch (QS2) and the second contactor.
4. the power supply circuits of a kind of large-scale unit servicing unit according to claim 3, it is characterized in that, in formation, also comprise two AC power relay indicating lights, after the auxiliary normally opened contact (KM1-3) of the first AC power relay indicating light (HD1) and the first contactor is connected in series, connect the single-phase voltage of the first AC power, after the auxiliary normally opened contact (KM2-3) of the second AC power relay indicating light (HD2) and the second contactor is connected in series, connect the single-phase voltage of the second AC power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320553151.0U CN203504284U (en) | 2013-09-06 | 2013-09-06 | Supply circuit of auxiliary device of large-scale unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320553151.0U CN203504284U (en) | 2013-09-06 | 2013-09-06 | Supply circuit of auxiliary device of large-scale unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203504284U true CN203504284U (en) | 2014-03-26 |
Family
ID=50335229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320553151.0U Expired - Fee Related CN203504284U (en) | 2013-09-06 | 2013-09-06 | Supply circuit of auxiliary device of large-scale unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203504284U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730239A (en) * | 2016-02-03 | 2016-07-06 | 中车株洲电力机车有限公司 | Vehicle-mounted load power supply circuit |
-
2013
- 2013-09-06 CN CN201320553151.0U patent/CN203504284U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730239A (en) * | 2016-02-03 | 2016-07-06 | 中车株洲电力机车有限公司 | Vehicle-mounted load power supply circuit |
| CN105730239B (en) * | 2016-02-03 | 2018-08-28 | 中车株洲电力机车有限公司 | A kind of vehicle-mounted load supplying circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20140326 Termination date: 20160906 |