CN218161907U - UPS power and standby power automatic switching circuit - Google Patents

UPS power and standby power automatic switching circuit Download PDF

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CN218161907U
CN218161907U CN202221707264.7U CN202221707264U CN218161907U CN 218161907 U CN218161907 U CN 218161907U CN 202221707264 U CN202221707264 U CN 202221707264U CN 218161907 U CN218161907 U CN 218161907U
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power supply
circuit
ups
ups power
power
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潘振宁
黄志鹏
马明迩
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Guangxi Liuzhou Iron and Steel Group Co Ltd
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Guangxi Liuzhou Iron and Steel Group Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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Abstract

The utility model discloses a UPS power and stand-by power supply automatic switching circuit relates to screen installation technical field. The utility model comprises a power supply unit, which comprises a UPS power circuit and a standby power circuit, wherein the UPS power circuit and the standby power circuit are connected in parallel; and the control switching unit comprises a first control circuit and a second control circuit, the first control circuit is positioned on the UPS circuit, and the second control circuit is positioned on the standby power circuit. The utility model discloses beneficial effect does: the utility model ensures that the UPS power supply is preferentially used for supplying power to the load under the condition that the UPS power supply is normal, because the output voltage of the UPS power supply is stable; when the UPS is damaged or overhauled, the UPS is immediately and automatically switched to a standby power supply 220VAC commercial power for supplying power; when the UPS power supply device is repaired, the UPS power supply device is automatically switched to supply power.

Description

UPS power and standby power automatic switching circuit
Technical Field
The utility model relates to a power switching technology field especially relates to a UPS power and stand-by power supply automatic switch-over circuit.
Background
At present, in a walking beam furnace of a hot rolling mill in a steel mill, power supply to important equipment such as a PLC control System, a vaporization cooling circulation System, and valve control and regulation is provided by respective UPS (Uninterruptible Power System), which is an Uninterruptible Power supply.
In the production and operation process, the UPS power supply device is damaged for many times, which causes the outage of important equipment such as a load PLC control system, a vaporization cooling circulation system, a valve control and regulation system and the like), the important equipment such as the vaporization cooling circulation system, a control and regulation valve and the like cannot be operated, the monitoring of a monitoring computer picture is invalid, once a furnace beam is burnt out or a heating furnace explodes, the consequences are not imaginable, the economic loss cannot be estimated, and the safety production of the heating furnace is seriously threatened.
Therefore, a set of power supply device automatically switched with the UPS power supply device needs to be designed, and when the UPS power supply device is damaged, the power supply device is automatically switched to the standby power supply immediately, so that normal power supply to the load is ensured, and normal operation and running of the load equipment are ensured.
SUMMERY OF THE UTILITY MODEL
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or other problems occurring in the prior art.
Therefore, the utility model aims to solve the problem that the spare power supply of automatic switch-over is lacked when UPS power failure or damage to and the UPS power supply automatic switch-over returns after recovering.
In order to solve the technical problem, the utility model provides a following technical scheme: an automatic switching circuit of a UPS power supply and a standby power supply comprises a power supply unit and a control switching unit; the power supply unit comprises a UPS power circuit and a standby power circuit, wherein the UPS power circuit and the standby power circuit are connected in parallel for operation; and the control switching unit comprises a first control circuit and a second control circuit, the first control circuit is positioned on the UPS circuit, and the second control circuit is positioned on the standby power circuit.
As a preferred scheme of UPS power and stand-by power supply automatic switching circuit, wherein: the input end of the UPS power circuit is connected with the UPS power supply, the output end of the UPS power circuit is connected with the load, and the UPS power circuit comprises a first live wire and a first zero wire.
As a preferred scheme of UPS power and stand-by power supply automatic switching circuit, wherein: the UPS power circuit sequentially passes through the first circuit breaker and the first control circuit.
As a preferred scheme of UPS power and stand-by power supply automatic switching circuit, wherein: the input end of the standby power supply circuit is connected with the commercial power, the output end of the standby power supply circuit is connected with the load, and the standby power supply circuit comprises a second live wire and a second zero wire.
As a preferred scheme of UPS power and stand-by power supply automatic switching circuit, wherein: and the standby power supply circuit sequentially passes through the second circuit breaker and the second control circuit.
As a preferred scheme of UPS power and stand-by power supply automatic switching circuit, wherein: the first control circuit comprises a third circuit breaker, a first relay and a first contactor, and the second control circuit comprises a fourth circuit breaker, a second relay and a second contactor.
As a preferred scheme of UPS power and stand-by power supply automatic switching circuit, wherein: and two ends of the first relay coil are respectively connected with the first live wire and the first zero wire.
As a preferred scheme of UPS power and stand-by power supply automatic switching circuit, wherein: and one end of the first contactor coil is connected with the first zero line, and the other end of the first contactor coil is connected with the first live wire after being connected with the first relay normally-open point and the second contactor normally-closed point in series.
As a preferred scheme of UPS power and stand-by power supply automatic switching circuit, wherein: and one end of the second relay coil is connected with a second zero line, and the other end of the second relay coil is connected with the second live line after being connected with the normally closed point of the first relay in series.
As a preferred scheme of UPS power and stand-by power supply automatic switch-over circuit, wherein: and one end of the second contactor coil is connected with the second zero line, and the other end of the second contactor coil is connected with the second live wire after being connected with the second relay normally-open point and the first contactor normally-closed point in series.
The utility model discloses beneficial effect does:
the utility model ensures that the UPS power supply is preferentially used for supplying power to the load under the condition that the UPS power supply is normal, because the output voltage of the UPS power supply is stable; when the UPS is damaged or overhauled, the UPS is immediately and automatically switched to a standby power supply 220VAC commercial power for supplying power; when the UPS power supply device is repaired, the UPS power supply device is automatically switched to supply power.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:
fig. 1 is an overall circuit schematic diagram of an automatic switching circuit of a UPS power supply and a backup power supply according to the present invention;
fig. 2 is a schematic diagram of a control switching unit circuit of the UPS power source and standby power source automatic switching circuit of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 and 2, for a first embodiment of the present invention, this embodiment provides an automatic switching circuit of a UPS power supply and a standby power supply, including a power supply unit 100 and a control switching unit 200; the power supply unit 100 comprises a UPS power circuit 101 and a standby power circuit 102, wherein the UPS power circuit 101 and the standby power circuit 102 are operated in parallel; the control switching unit 200 includes a first control circuit 201 and a second control circuit 202, the first control circuit 201 is disposed on the UPS power circuit 101, and the second control circuit 202 is disposed on the standby power circuit 102.
The input end of the UPS power circuit 101 is connected with a UPS power supply, the output end is connected with a load, and the UPS power circuit comprises a first live wire L1 and a first zero wire N1.
The UPS power circuit 101 passes through a first breaker Q1 and a first control circuit 201 in sequence.
The input end of the standby power supply circuit 102 is connected with 220VAC commercial power, the output end is connected with a load, and the standby power supply circuit comprises a second live wire L2 and a second zero wire N2.
The backup power circuit 102 passes through the second circuit breaker Q2 and the second control circuit 202 in sequence.
The first control circuit 201 includes a third breaker Q3, a first relay KA1, and a first contactor KM1, and the second control circuit 202 includes a fourth breaker Q4, a second relay KA2, and a second contactor KM2.
Two ends of a coil of the first relay KA1 are respectively connected with the first live wire L1 and the first zero wire N1.
One end of a coil of the first contactor KM1 is connected with a first zero line N1, and the other end of the coil of the first contactor KM1 is connected with a first live wire L1 after being connected with a first relay normally open point 201a and a second contactor normally closed point 201b in series.
One end of a coil of the second relay KA2 is connected with a second zero line N2, and the other end of the coil is connected with a first relay normally-closed point 202a in series and then connected with a second live line L2.
One end of a coil of the second contactor KM2 is connected with a second zero line N2, and the other end of the coil of the second contactor KM2 is connected with a second live line L2 after being connected with a second relay normally-open point 202b and a first contactor normally-closed point 202c in series.
Under the equal normal condition of UPS power and 220VAC commercial power of stand-by power supply, close first circuit breaker Q1, second circuit breaker Q2, third circuit breaker Q3 and fourth circuit breaker Q4, UPS power supply circuit 101 gets electric, and first live wire L1 and first zero line N1 get electric promptly, through third circuit breaker Q3, first relay KA1 gets electric action.
The standby power circuit 102 is powered on, that is, the second live wire L2 and the second zero wire N2 are powered on, and pass through the fourth circuit breaker Q4, but the intermediate relay KA1 is powered on to cause the normally closed point 202a of the first relay to be disconnected, so the second relay KA2 is not powered on, and the normally open point of the second relay is not closed, so the second contactor KM2 is not powered on.
Because the second contactor KM2 is not powered, the second contactor normally-closed point 201b is caused to be closed, and the first relay KA1 is powered to operate, and the first relay normally-open point 201a is caused to be closed, the first contactor KM1 is powered to operate, and at this time, only the UPS power supply device supplies power to the load.
Example 2
Referring to fig. 1 and 2, a second embodiment of the present invention, which is different from the first embodiment, is: when the UPS power supply device is damaged or overhauled, the UPS power supply circuit 101 is powered off, that is, the first live wire L1 and the first zero wire N1 are powered off, the first relay KA1 and the first contactor KM1 are powered off naturally, and the first relay normally-closed point 202a and the first contactor normally-closed point 202c are both kept closed. Because the first relay normally-closed point 202a is closed, the second relay KA2 is energized, causing the second relay normally-open point 202b to be closed. Because the normally closed point of the first contactor, the normally closed point 202c, and the normally open point of the second relay 202b are both closed, the second contactor KM2 is powered on to operate, and the standby power supply 220VAC commercial power is automatically switched to supply power to the load immediately.
Example 3
Referring to fig. 1 and 2, a third embodiment of the present invention is different from the first two embodiments: when the UPS power supply is repaired, after power transmission is recovered, namely the first circuit breaker Q1, the second circuit breaker Q2, the third circuit breaker Q3 and the fourth circuit breaker Q4 are started, the principle is consistent with the scene principle of the embodiment 1, and therefore the UPS power supply is automatically switched back to supply power to the load immediately.
The UPS adopts the following devices: inwitt, model HT1110XL,10KVA, output 220VAC; the backup power supply is 220VAC commercial power, and other selected electric lists are shown in the following table.
TABLE 1 list of selected appliances
Figure BDA0003728010790000051
It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or substituted by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a UPS power and stand-by power supply automatic switching circuit which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a power supply unit (100) including a UPS power supply circuit (101) and a backup power supply circuit (102), the UPS power supply circuit (101) and the backup power supply circuit (102) operating in parallel;
the control switching unit (200) comprises a first control circuit (201) and a second control circuit (202), wherein the first control circuit (201) is located on the UPS power circuit (101), and the second control circuit (202) is located on the standby power circuit (102).
2. The automatic switching circuit of the UPS power supply and the backup power supply as claimed in claim 1, wherein: the input end of the UPS power circuit (101) is connected with a UPS power supply, the output end of the UPS power circuit is connected with a load, and the UPS power circuit comprises a first live wire (L1) and a first zero wire (N1).
3. The automatic switching circuit of the UPS power supply and the backup power supply according to claim 2, wherein: the UPS power circuit (101) sequentially passes through the first circuit breaker (Q1) and the first control circuit (201).
4. The automatic switching circuit of the UPS power supply and the standby power supply according to any one of the claims 2 or 3, characterized in that: the input end of the standby power supply circuit (102) is connected with 220VAC commercial power, the output end of the standby power supply circuit is connected with a load, and the standby power supply circuit comprises a second live wire (L2) and a second zero wire (N2).
5. The automatic switching circuit of the UPS power supply and the backup power supply according to claim 4, wherein: the backup power circuit (102) passes through a second circuit breaker (Q2) and a second control circuit (202) in sequence.
6. The automatic switching circuit of the UPS power supply and the backup power supply according to claim 5, wherein: the first control circuit (201) comprises a third circuit breaker (Q3), a first relay (KA 1) and a first contactor (KM 1), and the second control circuit (202) comprises a fourth circuit breaker (Q4), a second relay (KA 2) and a second contactor (KM 2).
7. The automatic switching circuit of the UPS power supply and the backup power supply according to claim 6, wherein: and two ends of a coil of the first relay (KA 1) are respectively connected with the first live wire (L1) and the first zero wire (N1).
8. The automatic switching circuit of the UPS power supply and the backup power supply according to claim 6, wherein: one end of a coil of the first contactor (KM 1) is connected with a first zero line (N1), and the other end of the coil of the first contactor (KM 1) is connected with a first relay normally-open point (201 a) and a second contactor normally-closed point (201 b) in series and then connected with a first live line (L1).
9. The automatic switching circuit of the UPS power supply and the standby power supply according to any one of claims 6 to 8, wherein: and one end of a coil of the second relay (KA 2) is connected with a second zero line (N2), and the other end of the coil of the second relay (KA 2) is connected with a second live line (L2) after being connected with a first relay normally-closed point (202 a) in series.
10. The UPS power supply and backup power supply auto-switching circuit of claim 9, wherein: and one end of a coil of the second contactor (KM 2) is connected with a second zero line (N2), and the other end of the coil of the second contactor (KM 2) is connected with a second relay normally-open point (202 b) and a first contactor normally-closed point (202 c) in series and then connected with a second live line (L2).
CN202221707264.7U 2022-07-04 2022-07-04 UPS power and standby power automatic switching circuit Active CN218161907U (en)

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Application Number Priority Date Filing Date Title
CN202221707264.7U CN218161907U (en) 2022-07-04 2022-07-04 UPS power and standby power automatic switching circuit

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