CN217063285U - Locking device for controlling automatic switching device of standby power supply - Google Patents
Locking device for controlling automatic switching device of standby power supply Download PDFInfo
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- CN217063285U CN217063285U CN202123052338.6U CN202123052338U CN217063285U CN 217063285 U CN217063285 U CN 217063285U CN 202123052338 U CN202123052338 U CN 202123052338U CN 217063285 U CN217063285 U CN 217063285U
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- automatic switching
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Abstract
The utility model discloses a locking device for controlling a standby power supply automatic switching device, which comprises a first branch circuit, wherein the first branch circuit is connected with a PCA section standby power supply automatic switching device which is connected with a first locking loop; the second branch is connected with a PCB segment standby power supply automatic switching device, and the PCB segment standby power supply automatic switching device is connected with a second locking loop; the locking device for controlling the automatic switching device of the standby power supply can be used for locking any section of the automatic switching device of the standby power supply according to the actual situation on site by combining and increasing the manual locking loop in the service circuit, and the mode is flexible; the overload of the standby transformer caused by the fact that the low-voltage standby transformer is connected with two sections of bus loads at the same time is avoided; the backup power automatic switching device can be prevented from being locked by mistake due to the fault of any phase low-voltage relay, and the normal operation of the backup power automatic switching device is not influenced; when the bus fault is under voltage loss or the working incoming line power switch is stolen and jumped, the service power failure range is controlled, and further serious accidents are avoided.
Description
Technical Field
The utility model relates to a stand-by power supply equipment field of power plant specifically is a locking device of control stand-by power supply auto-switch-on device.
Background
At present, when a factory low-voltage working power supply operates normally, the working transformer A, B, C supplies power, and a low-voltage standby transformer serves as a standby power supply. The standby power supply automatic switching device detects the voltage of buses where the PCA, the PCB, the PCC and the standby transformer are located, meanwhile, the switch position state of the working power supply transformer is checked, and when the condition that the PC section bus is out of power or a fault switch of the low-voltage working transformer is tripped is detected, the standby power supply automatic switching device is immediately started to link the low-voltage standby transformer to be switched on. When the 6KV A section bus loses power, the low-voltage PCA and the PCB section lose power at the same time, the standby automatic switching devices of the PCA and the PCB section are started, the low-voltage standby transformer is linked to be automatically switched in, and loads of the PCA and the PCB two sections of buses are connected at the same time, so that the low-voltage standby transformer is tripped in an overload mode. This situation is likely to cause further expansion of power failure accidents, more economic losses and manpower restoration, and therefore a locking device for controlling the standby power source automatic switching device is required to avoid such a situation.
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, and in this section as well as in the abstract of the specification and the title of the application may be somewhat simplified or omitted to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplification or omission may not be used 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 technical problem that in the circuit is used in the factory at present, when standby transformer and working transformer not at same generating line take-over, and standby transformer as two and above working transformer when reserve, in case the generating line outage, thereby cause standby transformer to bear two transformer loads easily and lead to the overload tripping operation, further aggravate the accident and enlarge and consume the problem that more manpower overhauld.
In order to solve the technical problem, the utility model provides a following technical scheme: a locking device for controlling a self-switching device of a standby power supply comprises,
the first branch circuit (100) is connected with a PCA section standby power supply automatic switching device (101), and the PCA section standby power supply automatic switching device (101) is connected with a first locking loop (101 a);
and the second branch (200) is connected with a PCB (printed circuit board) segment standby power supply automatic switching device (102), and the PCB segment standby power supply automatic switching device (102) is connected with a second locking loop (102 a).
As a preferred scheme of a locking device of control stand-by power supply auto-switching device, wherein: the first locking loop (101a) is provided with a detection switch (101a-1) and a first mode selection switch (101a-2), and the detection switch (101a-1) and the first mode selection switch (101a-2) are connected in series.
As a preferred scheme of the locking device of a control stand-by power supply auto-switching device, wherein: the second locking loop (102a) is provided with a detection switch (101a-1) and a second mode selection switch (102a-2), and the detection switch (101a-1) and the second mode selection switch (102a-2) are connected in series.
As a preferred scheme of a locking device of control stand-by power supply auto-switching device, wherein: the detection switch (101a-1) comprises a first switch (101a-11), a second switch (101a-12) and a third switch (101a-13), and the detection switch (101a-1) is a normally closed contact of a three-phase low-voltage relay (300).
As a preferred scheme of a locking device of control stand-by power supply auto-switching device, wherein: the PCA section standby power supply automatic switching device (101) is further connected to a first branch switch closing circuit (400), and the first branch switch closing circuit (400) is connected to the first branch (100).
As a preferred scheme of a locking device of control stand-by power supply auto-switching device, wherein: the PCB segment standby power supply automatic switching device (102) is further connected to a second branch switch closing circuit (500), and the second branch switch closing circuit (500) is connected to the second branch (200).
As a preferred scheme of the locking device of a control stand-by power supply auto-switching device, wherein: the PCA segment standby power supply automatic switching device (101) is further connected to a first branch switch tripping circuit (600), and the first branch switch tripping circuit (600) is connected to a transformer A switch (601).
As a preferred scheme of a locking device of control stand-by power supply auto-switching device, wherein: the PCB segment standby power supply automatic switching device (102) is further connected to a second branch switch tripping control circuit (700), and the second branch switch tripping control circuit (700) is connected to a transformer B switch (701). As a preferred scheme of a locking device of control stand-by power supply auto-switching device, wherein: the PCA section standby power supply automatic switching device (101) and the PCB section standby power supply automatic switching device (102) are also connected to a 4DL switch closing control circuit (800), and the 4DL switch closing control circuit (800) is connected to a low-voltage standby transformer switch (801).
The utility model has the advantages that: the locking device for controlling the automatic switching device of the standby power supply can be used for locking any section of the automatic switching device of the standby power supply according to the actual situation on site by combining and adding a manual locking switch loop in an auxiliary circuit, and the mode is flexible; the overload of the standby transformer caused by the fact that the low-voltage standby transformer is connected with two sections of bus loads at the same time is avoided, and the safe operation of the transformer is threatened; the backup power automatic switching device can be prevented from being locked by mistake due to the fault of any phase low-voltage relay, and the normal operation of the backup power automatic switching device is not influenced; when the bus fails to be in voltage loss or the working incoming line power switch is stolen and jumped, the service power failure range is controlled, and further serious accidents are avoided.
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 description below 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 the drawings without inventive labor. Wherein:
fig. 1 is a schematic diagram of an overall common electrical connection of a locking device for controlling an automatic switching device of a standby power supply according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of a locking device for controlling an automatic switching device of a standby power supply according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a connection of a PCA section auto-switching device in a locking device for controlling an auto-switching device of a backup power according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a connection of a PCB segment backup power source auto-switching device in a locking device for controlling the backup power source auto-switching device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a three-phase low-voltage relay in a locking device for controlling an automatic switching device of a standby power supply according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail 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.
Next, the present invention will be described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of illustration, the sectional view showing the device structure will not be enlarged partially according to the general scale, and the schematic drawings are only examples, and should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Furthermore, the appearances of the phrase "one embodiment" or "an embodiment" in this specification are not necessarily referring to the same embodiment, but may also be referring to other embodiments. 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. 2-5, the present embodiment provides a locking device for controlling a standby power automatic switching device, including
The system comprises a first branch 100, wherein the first branch 100 is connected with a PCA (principal component analysis) segment standby power supply automatic switching device 101, and the PCA segment standby power supply automatic switching device 101 is connected with a first locking loop 101 a;
and a second branch 200, the second branch 200 is connected with a PCB segment standby power automatic switching device 102, and the PCB segment standby power automatic switching device 102 is connected with a second locking loop 102 a.
It should be noted that the PCA section backup power automatic switching device 101 is provided with a switch position abnormal locking circuit, a PCA section bus PT disconnection locking circuit, a backup power supply non-voltage locking circuit, a switch overcurrent locking circuit, a backup power automatic switching device abnormal locking circuit, and an external manual locking circuit in the prior art, and preferably, the first locking circuit 101a is connected in parallel to the external manual locking circuit.
It should be noted that, in the prior art, a switch position abnormal locking circuit, a PCB section bus PT disconnection locking circuit, a standby power supply non-voltage locking circuit, a switch overcurrent locking circuit, a backup automatic switching device abnormal locking circuit, and an external manual locking circuit are provided, and preferably, the second locking circuit 102a is connected in parallel to the external manual locking circuit.
Furthermore, the first latch circuit 101a is provided with a detection switch 101a-1 and a first mode selection switch 101a-2, and the detection switch 101a-1 and the first mode selection switch 101a-2 are connected in series.
Furthermore, the second latch circuit 102a is provided with a detection switch 101a-1 and a second mode selection switch 102a-2, and the detection switch 101a-1 and the second mode selection switch 102a-2 are connected in series.
Note that the first mode selection switch 101a-2 and the second mode selection switch 102a-2 are manual control switches.
Further, the detection switch 101a-1 includes a first switch 101a-11, a second switch 101a-12, and a third switch 101a-13, and the detection switch 101a-1 is a normally closed contact of the three-phase low-voltage relay 300.
It should be noted that the first switch 101a-11, the second switch 101a-12 and the third switch 101a-13 are normally closed contacts of a three-phase low voltage relay 300, the three-phase low voltage relay 300 is connected to the bus a, and when the bus a loses power, the first switch 101a-11, the second switch 101a-12 and the third switch 101a-13 can be closed at the same time.
Example 2
Referring to fig. 1-4, this embodiment is based on the previous embodiment, and provides a locking device for controlling an automatic switching device of a standby power supply, including a first branch 100, where the first branch 100 is connected with an automatic switching device 101 of a PCA section standby power supply, and the automatic switching device 101 of the PCA section standby power supply is connected with a first locking loop 101 a; and a second branch 200, the second branch 200 is connected with a PCB segment standby power automatic switching device 102, and the PCB segment standby power automatic switching device 102 is connected with a second locking loop 102 a.
Furthermore, the PCA section standby power source automatic switching device 101 is further connected to a first branch switch closing circuit 400, and the first branch switch closing circuit 400 is connected to the first branch 100.
Furthermore, the PCB segment backup power source automatic switching device 102 is further connected to a second branch switch closing circuit 500, and the second branch switch closing circuit 500 is connected to the second branch 200.
It should be noted that the opening and closing of the first branch switch closing circuit 400 is controlled by the first mode selection switch 101 a-2; the opening and closing of the second branch switch closing circuit 500 is controlled by the second mode selection switch 102 a-2.
Preferably, the first branch switch closing circuit 400 is connected to the action outlet of the PCA section standby power automatic switching device 101; the second branch switch closing circuit 500 is connected to the action outlet of the PCB segment standby power automatic switching device 102.
Furthermore, the PCA section standby power source automatic switching device 101 is further connected to a first branch switch tripping circuit 600, and the first branch switch tripping circuit 600 is connected to the transformer a switch 601.
Furthermore, the PCB segment backup power source automatic switching device 102 is further connected to a second branch switch tripping circuit 700, and the second branch switch tripping circuit 700 is connected to the transformer B switch 701.
It should be noted that the opening and closing of the first branch switch tripping control circuit 600 is controlled by the first mode selection switch 101 a-2; the opening and closing of the second branch switch trip control circuit 700 is controlled by the second mode selection switch 102 a-2.
Preferably, the first branch switch tripping control circuit 600 is connected to the action outlet of the PCA section standby power supply automatic switching device 101; the second branch switch tripping control circuit 700 is connected to the action outlet of the PCB segment standby power automatic switching device 102.
Furthermore, the PCA section backup power source automatic switching device 101 and the PCB section backup power source automatic switching device 102 are further connected to the 4DL switch closing control circuit 800, and the 4DL switch closing control circuit 800 is connected to the low-voltage backup transformer switch 801.
It should be noted that the opening and closing of the 4DL switch closing control circuit 800 is controlled by whether the PCA section backup power automatic switching device 101 or the PCB section backup power automatic switching device 102 is in use, and if one of the PCA section backup power automatic switching devices is in use, the switch is closed, and if none of the PCA section backup power automatic switching devices is in use, the switch is opened.
Specifically, the circuit application process of the device comprises the following steps:
when the unit is in operation, when the factory high-voltage 6kV A section bus fails, the working power supply A branch protection action switch trips, the working power supply A branch protection closes the factory fast switching device, the factory high-voltage standby power supply is not automatically switched on, so that the 6kV A section bus is subjected to voltage loss, at the moment, two low-voltage working transformers A, B carried by the fault section factory high-voltage bus are subjected to power loss, the three-phase low-voltage relay 300 is connected to the 6kV A section bus, the detection switch 101a-1 of the three-phase low-voltage relay detects the power loss, so that the first switch 101a-11, the second switch 101a-12 and the third switch 101a-13 are closed, and as the first locking loop 101a and the second locking loop 102a are both provided with the detection switch 101a-1, when the detection switch 101a-1 is closed, the PCA section standby power supply automatic switching device 101 and the PCB section standby power supply automatic switching device 102 are both put into use, however, the overload of the low-voltage backup transformer is caused when the two backup transformers are all put into use, so one of the two backup transformers needs to be locked selectively, at this time, an operator can select to close one of the first mode selection switch 101a-2 or the second mode selection switch 102a-2, if the first mode selection switch 101a-2 is selected to be closed, the locking of the automatic switching device 101 of the PCA section backup power supply is not put into use, meanwhile, the 4DL switch closing control circuit 800 is closed, and the first branch switch closing circuit 400 is opened; the PCB segment standby power supply automatic switching device 102 is put into use, the second branch switch closing circuit 500 is closed, and the second branch 200 is communicated; meanwhile, in order to prevent the current from flowing backwards, the second branch switch tripping circuit 700 is turned off, so that the transformer B switch 701 is turned off.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
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 has been 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 replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (9)
1. A locking device for controlling a standby power supply automatic switching device is characterized in that: comprises that
The first branch circuit (100) is connected with a PCA (principal component analysis) section standby power supply automatic switching device (101), and the PCA section standby power supply automatic switching device (101) is connected with a first locking loop (101 a);
and the second branch (200) is connected with a PCB (printed circuit board) segment standby power supply automatic switching device (102), and the PCB segment standby power supply automatic switching device (102) is connected with a second locking loop (102 a).
2. The lock-out device for controlling the automatic switching device of the backup power according to claim 1, wherein: the first locking loop (101a) is provided with a detection switch (101a-1) and a first mode selection switch (101a-2), and the detection switch (101a-1) and the first mode selection switch (101a-2) are connected in series.
3. The locking device for controlling the automatic switching device of the standby power supply according to claim 2, wherein: the second locking loop (102a) is provided with a detection switch (101a-1) and a second mode selection switch (102a-2), and the detection switch (101a-1) and the second mode selection switch (102a-2) are connected in series.
4. The lock device for controlling the backup power source automatic switching device according to claim 2 or 3, wherein: the detection switch (101a-1) comprises a first switch (101a-11), a second switch (101a-12) and a third switch (101a-13), and the detection switch (101a-1) is a normally closed contact of a three-phase low-voltage relay (300).
5. The locking device for controlling the automatic switching device of the standby power supply according to claim 4, wherein: the PCA segment standby power supply automatic switching device (101) is further connected to a first branch switch closing circuit (400), and the first branch switch closing circuit (400) is connected to the first branch (100).
6. The locking device for controlling the automatic switching device of the standby power supply according to claim 5, wherein: the PCB segment standby power supply automatic switching device (102) is further connected to a second branch switch closing circuit (500), and the second branch switch closing circuit (500) is connected to the second branch (200).
7. The lock-out device for controlling the backup power source automatic switching device according to claim 6, wherein: the PCA segment standby power supply automatic switching device (101) is further connected to a first branch switch tripping circuit (600), and the first branch switch tripping circuit (600) is connected to a transformer A switch (601).
8. The locking device for controlling the automatic switching device of the standby power supply according to any one of claims 5 to 7, wherein: the PCB segment standby power supply automatic switching device (102) is further connected to a second branch switch tripping control circuit (700), and the second branch switch tripping control circuit (700) is connected to a transformer B switch (701).
9. The lock-out device for controlling the backup power source automatic switching device according to claim 8, wherein: the PCA section standby power supply automatic switching device (101) and the PCB section standby power supply automatic switching device (102) are also connected to a 4DL switch closing control circuit (800), and the 4DL switch closing control circuit (800) is connected to a low-voltage standby transformer switch (801).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123052338.6U CN217063285U (en) | 2021-12-07 | 2021-12-07 | Locking device for controlling automatic switching device of standby power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123052338.6U CN217063285U (en) | 2021-12-07 | 2021-12-07 | Locking device for controlling automatic switching device of standby power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217063285U true CN217063285U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123052338.6U Active CN217063285U (en) | 2021-12-07 | 2021-12-07 | Locking device for controlling automatic switching device of standby power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217063285U (en) |
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- 2021-12-07 CN CN202123052338.6U patent/CN217063285U/en active Active
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