CN220435062U - Cooling fan power supply system for high-temperature reactor frequency converter - Google Patents
Cooling fan power supply system for high-temperature reactor frequency converter Download PDFInfo
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- CN220435062U CN220435062U CN202322131475.1U CN202322131475U CN220435062U CN 220435062 U CN220435062 U CN 220435062U CN 202322131475 U CN202322131475 U CN 202322131475U CN 220435062 U CN220435062 U CN 220435062U
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- 238000001816 cooling Methods 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 230000007812 deficiency Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The embodiment of the disclosure provides a power supply system for a variable cooling fan of a high-temperature reactor frequency converter, which is characterized by comprising a power supply, a daily fan, a standby fan and a standby fan control loop; the power supply is used for supplying power to the daily fan and the standby fan through the power transmission line respectively; a standby fan contactor is arranged on a power transmission line between the standby fan and the power supply; the standby fan control loop is electrically connected with the standby fan contactor and used for controlling the switching-on of the standby fan contactor when the daily fan fails. According to the power supply system for the variable cooling fan of the high-temperature reactor frequency converter, due to the fact that the standby fan and the automatic control loop of the standby fan are arranged, when the daily cooling fan of the high-temperature reactor frequency converter is disconnected due to faults and the like, the standby fan is automatically put into the transformer to dissipate heat, stable operation of the transformer is guaranteed, shutdown of the high-temperature reactor is prevented, and stability and safety of a power system are improved.
Description
Technical Field
The embodiment of the disclosure belongs to the technical field of electrical engineering, and particularly relates to a power supply system for a variable cooling fan of a high-temperature reactor frequency converter.
Background
The main helium fan is a helium circulating fan in a high-temperature gas cooled reactor coolant system, a power supply of the main helium fan is taken from a 6kV medium-voltage bus, a medium-voltage switch is powered from the bus to a transformer, the frequency converter changes the voltage and supplies power to the frequency converter, and the frequency converter is supplied with the main helium fan after frequency modulation, so that the safe and stable operation of the frequency converter is crucial to the high-temperature gas cooled reactor.
The frequency converter adopts forced air cooling, and 3 groups of 6 fans provide cooling air quantity, so that the full-load heat dissipation requirement of the frequency converter can be provided during all operation. Once a fan fails or the fan loses power, the transformer loses enough cooling, the temperature rises sharply, the frequency converter is disconnected, and therefore the reactor stops running, and serious safety accidents can be caused.
Disclosure of Invention
The embodiment of the disclosure aims at solving at least one of the technical problems existing in the prior art and provides a power supply system for a variable cooling fan of a high-temperature reactor frequency converter.
The system comprises a power supply, a daily fan, a standby fan and a standby fan control loop;
the power supply is used for supplying power to the daily fan and the standby fan through the power transmission line respectively;
a standby fan contactor is arranged on a power transmission line between the standby fan and the power supply;
the standby fan control loop is electrically connected with the standby fan contactor and used for controlling the switching-on of the standby fan contactor when the daily fan fails.
Optionally, a fan protection switch is arranged at the inlet wire end of the daily fan; the standby fan control loop comprises a first standby fan control branch and a second standby fan control branch;
the first control branch of the standby fan and the second control branch of the standby fan are connected in parallel with the power supply;
the auxiliary normally-closed contact of the protection switch of the daily fan and the first intermediate relay which are mutually connected in series are arranged on the first control branch of the standby fan; and an auxiliary normally open contact of a first intermediate relay and a closing coil of a standby fan contactor which are mutually connected in series are arranged on the second control branch of the standby fan.
Further, the daily fan comprises a first daily fan, a second daily fan and a third daily fan;
the auxiliary normally-closed contact of the daily fan protection switch comprises a first auxiliary normally-closed contact of the daily fan protection switch, a second auxiliary normally-closed contact of the daily fan protection switch and a third auxiliary normally-closed contact of the daily fan protection switch which are connected in parallel.
In another aspect, the power source includes a first power source and a second power source; the first power supply and the second power supply are respectively connected to the power transmission line;
the output ends of the first power supply and the second power supply are respectively provided with a first power supply contactor and a second power supply contactor; the first power supply contactor and the second power supply contactor are selectively switched on;
when the first power supply contactor is switched on, the first power supply transmits power to the power transmission line; and when the second power supply contactor is switched on, the second power supply transmits power to the power transmission line.
Optionally, the output end of the first power supply is respectively connected with a first voltage relay and a first power supply control loop; the output end of the second power supply is respectively connected with a second voltage relay and a second power supply control loop;
the first power supply control loop is used for controlling the first power supply contactor to be switched on and the second power supply contactor to be kept switched off when the first voltage relay is powered on;
and the second power supply control loop is used for controlling the second power supply contactor to be switched on and the first power supply contactor to keep switching off when the second voltage relay is electrified.
Further, the first power supply control loop comprises a first power supply first control branch and a first power supply second control branch;
an auxiliary normally open contact and a second intermediate relay of a first voltage relay which are mutually connected in series are arranged on a first control branch of the first power supply;
and the first power supply second control branch is provided with an auxiliary normally-open contact of a second intermediate relay, an auxiliary normally-closed contact of a second power supply contactor and a closing coil of the first power supply contactor which are mutually connected in series.
Further, the second power supply control loop comprises a second power supply first control branch and a second power supply second control branch;
an auxiliary normally open contact and a third intermediate relay of a second voltage relay which are mutually connected in series are arranged on the first control branch of the second power supply;
and an auxiliary normally-open contact of a third intermediate relay, an auxiliary normally-closed contact of the first power contactor and a closing coil of the second power contactor which are mutually connected in series are arranged on the second control branch of the second power supply.
In still another aspect, a standby fan protection switch is arranged at the inlet end of the standby fan; the system also comprises a fan fault alarming unit, an air quantity deficiency alarming unit and a power supply fault alarming unit;
the fan fault alarm unit is connected with an auxiliary normally open contact of the first intermediate relay in series;
the air quantity deficiency alarm unit is connected in series with the air quantity alarm loop; the air quantity alarm loop comprises a plurality of parallel branches; wherein, each parallel branch is provided with auxiliary normally-closed contacts of any two fan protection switches which are mutually connected in series, and the combination mode of the auxiliary normally-closed contacts of each fan protection switch is at least once;
the power failure alarm unit, the auxiliary normally closed contact of the first voltage relay and the auxiliary normally closed contact of the second voltage relay are mutually connected in series.
According to the power supply system for the variable cooling fan of the high-temperature reactor frequency converter, due to the fact that the standby fan and the automatic control loop of the standby fan are arranged, when the daily cooling fan of the high-temperature reactor frequency converter is disconnected due to faults and the like, the standby fan is automatically put into the transformer to dissipate heat, stable operation of the transformer is guaranteed, shutdown of the high-temperature reactor is prevented, and stability and safety of a power system are improved.
Drawings
Fig. 1 is a schematic structural diagram of a power supply system for a variable cooling fan of a high-temperature reactor frequency converter according to an embodiment of the disclosure;
fig. 2 is a schematic structural diagram of a power supply system for a variable cooling fan of a high-temperature reactor frequency converter according to another embodiment of the disclosure;
FIG. 3 is a schematic diagram of an alarm system according to another embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one element from another element. Accordingly, a first component discussed below could be termed a second component without departing from the teachings of the concepts of the present disclosure. As used in this disclosure, the term "and/or" includes any one of the associated listed items and all combinations of one or more.
Those skilled in the art will appreciate that the drawings are schematic representations of example embodiments and that the modules or flows in the drawings are not necessarily required to practice the present disclosure, and therefore, should not be taken to limit the scope of the present disclosure.
As shown in fig. 1, a cooling fan power supply system for a high temperature reactor frequency converter according to an embodiment of the present disclosure includes a power source S, a daily fan 100, a backup fan 200, and a backup fan control loop 300. The power source S is configured to supply power to the daily fan 100 and the standby fan 200 through power transmission lines, respectively. And a standby fan contactor KM4 is arranged on the power transmission line between the standby fan 200 and the power supply S. The standby fan control loop 300 is electrically connected with the standby fan contactor KM4, and is used for controlling the standby fan contactor KM4 to be switched on when the daily fan 100 fails.
Illustratively, as shown in fig. 1, a fan protection switch KF is disposed at the inlet end of the daily fan 100. The backup blower control loop 300 includes a backup blower first control branch 310 and a backup blower second control branch 320. The first backup fan control branch 310 and the second backup fan control branch 320 are connected in parallel to the power source S. The auxiliary normally-closed contact KF' of the protection switch of the daily fan and KA1 of the first intermediate relay which are mutually connected in series are arranged on the first control branch 310 of the standby fan; the auxiliary normally open contact KA1-1 of the first intermediate relay and the switch-on coil 321 of the auxiliary fan contactor which are connected in series are arranged on the second control branch 320 of the auxiliary fan.
Specifically, the auxiliary normally-closed contact KF 'of the daily fan protection switch is linked with the daily fan protection switch KF, when the daily fan 100 fails, the inlet wire protection switch KF thereof is opened, meanwhile, the auxiliary normally-closed contact KF' of the protection switch is closed, the first intermediate relay KA1 is powered on, the auxiliary normally-open contact KA1-1 of the first intermediate relay is closed, the standby fan second control branch 320 is conducted, the standby fan contactor switching-on coil 321 is powered on, the standby fan contactor KM4 is switched on, and the standby fan 200 is powered on to start running.
In some embodiments, the transformer has 3 groups of 6 daily fans, as shown in fig. 1, two of the daily fans 100 are connected in parallel to the power transmission line, at this time, the protection switch KF includes protection switches KF1, KF2 and KF3 of each group of the inlet terminals of the daily fans, and auxiliary normally closed contacts KF1-1, KF2-1 and KF3-1 corresponding to the protection switches are connected in parallel to each other on the first control branch 310 of the spare fan and connected in series with the first intermediate relay KA 1. Two standby fans 200 and a standby fan contactor KM4 are provided as a group. When any one of the daily fans fails, for example, a fan downstream of the protection switch KF2 fails, the corresponding second daily fan protection switch KF2 is opened, the auxiliary normally-closed contact KF2-1 is closed, so that the first intermediate relay KA1 is powered on, the auxiliary normally-open contact KA1-1 of the first intermediate relay is closed, the switching-on coil 321 of the standby fan contactor is powered on, the standby fan contactor KM4 is switched on, and the standby fan 200 is put into operation. When the rest of the daily fans fail, the process is the same as the above, and the embodiment is not described here again. That is, when any one of the daily fans fails, the system will automatically put the backup fan 200 in through the backup fan control loop 300.
It will be appreciated that the backup fan control loop 300 of the present embodiment may be disposed on the secondary side of the transmission line, or may be powered by a separate power source.
According to the power supply system for the variable cooling fan of the high-temperature reactor frequency converter, due to the fact that the standby fan and the automatic control loop of the standby fan are arranged, when the daily cooling fan of the high-temperature reactor frequency converter is disconnected due to faults and the like, the standby fan is automatically put into the transformer to dissipate heat, stable operation of the transformer is guaranteed, shutdown of the high-temperature reactor is prevented, and stability and safety of a power system are improved.
As shown in fig. 2, the power source S in the power supply system of the variable cooling fan of the high-temperature reactor frequency converter according to the embodiment of the disclosure includes a first power source S1 and a second power source S2. The output ends of the first power supply S1 and the second power supply S2 are respectively provided with a first power supply contactor KM1 and a second power supply contactor KM2; the first power supply contactor KM1 and the second power supply contactor KM2 are selectively switched on. When the first power supply contactor is switched on KM1, the first power supply S1 transmits power to the power transmission line; when the second power contactor KM2 is closed, the second power source S2 transmits power to the power transmission line.
Illustratively, as shown in fig. 2, the output end of the first power supply S1 is connected to a first voltage relay KV1 and a first power supply control loop 400, respectively; the output end of the second power supply S2 is connected to a second voltage relay KV2 and a second power supply control loop 500, respectively. The first power control circuit 400 is configured to control the first power contactor KM1 to close and the second power contactor KM2 to keep open when the first voltage relay KV1 is powered. The second power control loop 500 is configured to control the second power contactor KM2 to close and the first power contactor KM1 to keep open when the second voltage relay KV2 is powered.
Specifically, the first power control loop 400 includes a first power first control leg 410 and a first power second control leg 420. The first power supply first control branch 410 is provided with an auxiliary normally open contact KV1-1 and a second intermediate relay KA2 of a first voltage relay which are mutually connected in series. The first power supply second control branch 420 is provided with an auxiliary normally open contact KA2-1 of a second intermediate relay, an auxiliary normally closed contact KM2-1 of a second power supply contactor and a first power supply contactor closing coil 421 which are connected in series.
The second power control loop 500 includes a second power first control leg 510 and a second power second control leg 520. The second power supply first control branch 510 is provided with an auxiliary normally open contact KV2-1 and a third intermediate relay KA3 of a second voltage relay which are mutually connected in series. The second power supply second control branch 520 is provided with an auxiliary normally open contact KA3-1 of a third intermediate relay, an auxiliary normally closed contact KM1-1 of the first power supply contactor and a second power supply contactor closing coil 521 which are connected in series.
The power supply system of the variable cooling fan of the high-temperature reactor frequency converter can automatically select one of two power supplies to be put into operation. In the initial state, the first power switch Q1, the second power switch Q2, the first power contactor KM1 and the second power contactor KM2 are all turned off. After the first power switch Q1 and the second power switch Q2 are closed, if the first voltage relay KV1 is powered on first, an auxiliary normally open contact KV1-1 of the first voltage relay is closed, the second intermediate relay KA2 is powered on, an auxiliary normally open contact KA2-1 of the second intermediate relay is closed, the first power second control branch 420 is conducted, the first power contactor closing coil 421 is powered on, and therefore the first power contactor KM1 is closed; at this time, the auxiliary normally-closed contact KM1-1 of the first power contactor is opened, and the second control branch 520 of the second power supply cannot be turned on after the second voltage relay KV2 is powered on, so that the second power supply contactor KM2 cannot be closed, and the first power supply S1 alone transmits power to the power transmission line. Similarly, if the second voltage relay KV2 is powered first, the second power supply contactor KM2 is closed, but the first power supply contactor KM1 cannot be closed, and the second power supply S2 alone transmits power to the power transmission line.
When the first power supply S1 works, a fault occurs, the first voltage relay KV1 is powered off, an auxiliary normally-open contact KV1-1 of the first voltage relay is disconnected, the second intermediate relay KA2 is powered off, an auxiliary normally-open contact KA2-1 of the second intermediate relay is disconnected, a closing coil 421 of the first power supply contactor is powered off, so that the first power supply S1 is disconnected, and an auxiliary normally-closed contact KM1-1 of the first power supply contactor is closed; at this time, if the second power source S2 transmits power normally, the second voltage relay KV2 and the third intermediate relay KA3 are in a power-on state, the auxiliary normally-open contact KA3-1 of the third intermediate relay is closed, when the auxiliary normally-closed contact KM1-1 of the first power source contactor is closed, the second control branch 520 of the second power source is turned on, and the closing coil 521 of the second power source contactor is powered on, so that the second power source contactor KM2 is closed, and the second power source S2 alone transmits power to the power transmission line. Similarly, when the second power supply S2 fails during operation, the second power supply S2 is cut off and the first power supply S1 is turned on through the first power supply control loop 400 and the second power supply control loop 500, and detailed implementation processes are not described herein.
According to the power supply system for the variable cooling fan of the high-temperature reactor frequency converter, the dual power supplies are arranged, the two power supplies are main and standby, the voltage relay and the power supply control loop are arranged to automatically select one input, and the power supply is automatically switched when the power supply fails, so that the stable operation of the cooling fan is ensured, the transformer is enabled to obtain stable heat dissipation, and further serious safety accidents caused by shutdown of the high-temperature reactor are prevented, and the stability and safety of the power system are improved.
As shown in fig. 3, a cooling fan power supply system for a high-temperature reactor frequency converter according to an embodiment of the present disclosure further includes a fan fault alarm unit 601, an air volume shortage alarm unit 602, and a power fault alarm unit 603;
specifically, the fan fault alarm unit 601 is connected in series with the auxiliary normally open contacts KA1-2 of the first intermediate relay. When any fan breaks down to cause the first branch 321 in the standby fan control loop 300 to be conducted, the first intermediate relay KA1 is powered on, so that the auxiliary normally open contact KA1-2 of the first intermediate relay is closed, and the fan fault alarm unit 601 alarms.
Referring to fig. 2, a standby fan protection switch KF4 is arranged at the inlet end of the standby fan. The air volume shortage alarm unit 602 is connected in series to the air volume alarm circuit 620; the air volume alarm circuit 620 includes a plurality of parallel branches; and each parallel branch is provided with auxiliary normally-closed contacts of any two fan protection switches which are mutually connected in series, and the combination mode of the auxiliary normally-closed contacts of each fan protection switch is at least once. That is, when the system has four sets of fans, the corresponding auxiliary normally-closed contacts of the inlet end protection switches of each set of fans are connected in series in pairs in one branch of the air volume alarm circuit 620, and all the combination modes occur. For example, at least six parallel branches are needed in the air volume alarm circuit 620, the first branch is connected in series with the auxiliary contact KF1-2 of the first fan protection switch and the auxiliary contact KF2-2 of the second fan protection switch, the second branch is connected in series with the auxiliary contact KF1-3 of the first fan protection switch and the auxiliary contact KF3-2 of the third fan protection switch, the third branch is connected in series with the auxiliary contact KF1-4 of the first fan protection switch and the auxiliary contact KF4-2 of the fourth fan protection switch, the fourth branch is connected in series with the auxiliary contact KF2-3 of the second fan protection switch and the auxiliary contact KF3-3 of the third fan protection switch, the fifth branch is connected in series with the auxiliary contact KF2-4 of the second fan protection switch and the auxiliary contact KF4-3 of the fourth fan protection switch, and the sixth branch is connected in series with the auxiliary contact KF3-4 of the third fan protection switch and the auxiliary contact KF4-4 of the fourth fan protection switch. When any two groups of fans have faults, the protection switches of the inlet ends of the two groups of fans are tripped, and the corresponding auxiliary normally-closed contacts are closed, so that one parallel branch in the air quantity alarming loop 620 is conducted, and the air quantity insufficiency alarming unit 602 alarms.
The power failure warning unit 603, the auxiliary normally closed contact KV1-2 of the first voltage relay and the auxiliary normally closed contact KV2-2 of the second voltage relay are mutually connected in series. When the first voltage relay KV1 is powered off, an auxiliary normally-closed contact KV1-2 of the first voltage relay is closed; when the second voltage relay KV2 is powered off, the auxiliary normally-closed contact KV2-2 of the first voltage relay is closed. When the first power supply S1 and the second power supply S2 fail, the first voltage relay KV1 and the second voltage relay KV2 lose electricity, the auxiliary normally closed contact KV1-2 of the first voltage relay and the auxiliary normally closed contact KV2-2 of the second voltage relay are closed at the same time, the loop is conducted, and the power failure alarming unit 603 alarms.
In some embodiments, the fan failure alarm unit 601, the air volume deficiency alarm unit 602, and the power failure alarm unit 603 may be integrated in the main control room alarm system 600 and managed by a remote person.
According to the power supply system for the variable cooling fan of the high-temperature reactor frequency converter, through the arrangement of the three alarm units, corresponding alarm signals can be sent out when different types of faults occur in the system, on-site or remote personnel are prompted to process the faults, and the fault type detection system is convenient to conduct investigation on different fault types.
It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.
Claims (10)
1. The power supply system for the variable cooling fan of the high-temperature reactor frequency converter is characterized by comprising a power supply, a daily fan, a standby fan and a standby fan control loop;
the power supply is used for supplying power to the daily fan and the standby fan through the power transmission line respectively;
a standby fan contactor is arranged on a power transmission line between the standby fan and the power supply;
the standby fan control loop is electrically connected with the standby fan contactor and used for controlling the switching-on of the standby fan contactor when the daily fan fails.
2. The system of claim 1, wherein a fan protection switch is provided at the inlet end of the daily fan; the standby fan control loop comprises a first standby fan control branch and a second standby fan control branch;
the first control branch of the standby fan and the second control branch of the standby fan are connected in parallel with the power supply;
the auxiliary normally-closed contact of the protection switch of the daily fan and the first intermediate relay which are mutually connected in series are arranged on the first control branch of the standby fan; and an auxiliary normally open contact of a first intermediate relay and a closing coil of a standby fan contactor which are mutually connected in series are arranged on the second control branch of the standby fan.
3. The system of claim 2, wherein the daily fan comprises a first daily fan, a second daily fan, and a third daily fan;
the auxiliary normally-closed contact of the daily fan protection switch comprises a first auxiliary normally-closed contact of the daily fan protection switch, a second auxiliary normally-closed contact of the daily fan protection switch and a third auxiliary normally-closed contact of the daily fan protection switch which are connected in parallel.
4. A system according to any one of claims 1 to 3, wherein the power source comprises a first power source and a second power source;
the output ends of the first power supply and the second power supply are respectively provided with a first power supply contactor and a second power supply contactor; the first power supply contactor and the second power supply contactor are selectively switched on;
when the first power supply contactor is switched on, the first power supply transmits power to the power transmission line; and when the second power supply contactor is switched on, the second power supply transmits power to the power transmission line.
5. The system of claim 4, wherein the output terminal of the first power supply is connected to a first voltage relay and a first power supply control loop, respectively; the output end of the second power supply is respectively connected with a second voltage relay and a second power supply control loop;
the first power supply control loop is used for controlling the first power supply contactor to be switched on and the second power supply contactor to be kept switched off when the first voltage relay is powered on;
and the second power supply control loop is used for controlling the second power supply contactor to be switched on and the first power supply contactor to keep switching off when the second voltage relay is electrified.
6. The system of claim 5, wherein the first power control loop comprises a first power first control branch and a first power second control branch;
an auxiliary normally open contact and a second intermediate relay of a first voltage relay which are mutually connected in series are arranged on a first control branch of the first power supply;
and the first power supply second control branch is provided with an auxiliary normally-open contact of a second intermediate relay, an auxiliary normally-closed contact of a second power supply contactor and a closing coil of the first power supply contactor which are mutually connected in series.
7. The system of claim 5, wherein the second power control loop comprises a second power first control leg and a second power second control leg;
an auxiliary normally open contact and a third intermediate relay of a second voltage relay which are mutually connected in series are arranged on the first control branch of the second power supply;
and an auxiliary normally-open contact of a third intermediate relay, an auxiliary normally-closed contact of the first power contactor and a closing coil of the second power contactor which are mutually connected in series are arranged on the second control branch of the second power supply.
8. The system of claim 2, further comprising a fan fault alert unit;
the fan fault alarm unit is connected with an auxiliary normally open contact of the first intermediate relay in series.
9. A system according to claim 3, wherein the incoming line end of the backup fan is provided with a backup fan protection switch; the system also comprises an air quantity shortage alarming unit; the air quantity deficiency alarm unit is connected in series with the air quantity alarm loop;
the air quantity alarm loop comprises a plurality of parallel branches; and each parallel branch is provided with auxiliary normally-closed contacts of any two fan protection switches which are mutually connected in series, and the combination mode of the auxiliary normally-closed contacts of each fan protection switch is at least once.
10. The system of claim 5, further comprising a power failure warning unit;
the power failure alarm unit, the auxiliary normally closed contact of the first voltage relay and the auxiliary normally closed contact of the second voltage relay are mutually connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322131475.1U CN220435062U (en) | 2023-08-09 | 2023-08-09 | Cooling fan power supply system for high-temperature reactor frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322131475.1U CN220435062U (en) | 2023-08-09 | 2023-08-09 | Cooling fan power supply system for high-temperature reactor frequency converter |
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| Publication Number | Publication Date |
|---|---|
| CN220435062U true CN220435062U (en) | 2024-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322131475.1U Active CN220435062U (en) | 2023-08-09 | 2023-08-09 | Cooling fan power supply system for high-temperature reactor frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220435062U (en) |
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2023
- 2023-08-09 CN CN202322131475.1U patent/CN220435062U/en active Active
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