CN220066876U - High-voltage switch cabinet - Google Patents
High-voltage switch cabinet Download PDFInfo
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- CN220066876U CN220066876U CN202320936269.5U CN202320936269U CN220066876U CN 220066876 U CN220066876 U CN 220066876U CN 202320936269 U CN202320936269 U CN 202320936269U CN 220066876 U CN220066876 U CN 220066876U
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model provides a high-voltage switch cabinet which comprises a control power supply, a microcomputer comprehensive protection device, a circuit breaker and a differential protection relay, wherein the circuit breaker comprises a switching-on loop and a switching-off loop, one end of the switching-on loop is electrically connected with a switching-on terminal of the microcomputer comprehensive protection device, the other end of the switching-off loop is electrically connected with a negative electrode of the control power supply, one end of the switching-off loop is electrically connected with a switching-off terminal of the microcomputer comprehensive protection device, the other end of the switching-off loop is electrically connected with the negative electrode of the control power supply, one end of a first normally open contact of the differential protection relay is electrically connected with an anode of the control power supply, and the other end of the first normally open contact of the differential protection relay is electrically connected with a switching-off terminal of the microcomputer comprehensive protection device. The utility model can effectively break the gate to cut off faults.
Description
Technical Field
The utility model relates to the technical field of power equipment, in particular to a high-voltage switch cabinet.
Background
At present, a large number of switch cabinets are needed by production enterprises and power supply management departments to be used for placing various control switches, motors, generators or other control equipment, along with the development of industry, the requirements of various industries on the power supply reliability and stability of a power system are increasingly improved, and a transformer substation is used as a core link of the power system and mainly used for collecting power supply, lifting voltage and distributing electric energy and is responsible for high-low voltage transformation and power supply tasks of the area. The high-voltage switch cabinet is used as important equipment in a transformer substation, plays a role in closing and opening a power line, and has very important significance for safe and reliable operation of a power system.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of a high-voltage switch cabinet in the prior art, the high-voltage switch in the prior art comprises a control power supply, a first switch SA1, a second switch SA2, a microcomputer integrated protection device 100, a circuit breaker 200, a differential protection relay and a non-electric quantity protection relay, a positive terminal B23 of the microcomputer integrated protection device 100 is electrically connected with a positive electrode of the control power supply through the first switch SA1, a negative terminal D13 of the microcomputer integrated protection device 100 is electrically connected with a negative electrode of the control power supply through the second switch SA2, one end of a first normally open contact C09 of the differential protection relay is electrically connected with a tripping protection terminal D07 of the microcomputer integrated protection device 100 through the first switch SA1, one end of a second normally open contact C11 of the non-electric quantity protection relay is electrically connected with a tripping protection terminal D07 of the microcomputer integrated protection device 100 through the first switch SA1, one end of the C12 is electrically connected with a tripping protection terminal D07 of the microcomputer integrated protection device 100 through the first switch SA1, one end of a tripping protection circuit is electrically connected with a tripping protection terminal D2 through the second switch SA2, one end of the tripping protection circuit is electrically connected with the tripping protection terminal D07 of the microcomputer integrated protection device through the second switch 2 and the other end of the switching off circuit. According to the working principle of the microcomputer comprehensive protection device 100, when in differential protection action, the differential protection relay responsible for main protection tripping is connected with points C09 and C10, the relay of the microcomputer comprehensive protection device 100 is connected with points D07 and D09, the brake-separating coil of the brake-separating loop of the circuit breaker 200 is electrically operated, and the circuit breaker 200 is separated. During non-electric quantity protection action, a non-electric quantity protection relay responsible for main protection tripping is connected with C11 and C12 points, a relay of the microcomputer comprehensive protection device 100 is connected with D07 and D09 points, a brake-separating coil of a brake-separating loop of the circuit breaker 200 is electrically operated, and the circuit breaker 200 is separated.
However, in the operation and maintenance process of the high-voltage switch cabinet in the prior art, the situation that the relay in the microcomputer comprehensive protection device does not act can occur, and the breaker cannot obtain the effective breaking of the breaking signal so as to cut off faults.
Disclosure of Invention
The utility model aims to provide a high-voltage switch cabinet, which solves the problem that the existing high-voltage switch cabinet circuit breaker cannot obtain an effective switching-off signal to switch off a fault.
In order to solve the technical problems, the utility model provides a high-voltage switch cabinet which comprises a control power supply, a microcomputer integrated protection device, a circuit breaker and a differential protection relay, wherein the circuit breaker comprises a switching-on loop and a switching-off loop, one end of the switching-on loop is electrically connected with a switching-on terminal of the microcomputer integrated protection device, the other end of the switching-off loop is electrically connected with a negative electrode of the control power supply, one end of the switching-off loop is electrically connected with a switching-off terminal of the microcomputer integrated protection device, the other end of the switching-off loop is electrically connected with a negative electrode of the control power supply, one end of a first normally open contact of the differential protection relay is electrically connected with a positive electrode of the control power supply, and the other end of the first normally open contact of the differential protection relay is electrically connected with a switching-off terminal of the microcomputer integrated protection device.
Optionally, the circuit breaker further comprises a first hard pressing plate, wherein the first hard pressing plate is arranged on a circuit which is electrically connected with the opening terminal and the other end of the first normally open contact.
Optionally, the microcomputer integrated protection device further comprises a non-electric quantity protection relay, wherein one end of a second normally open contact of the non-electric quantity protection relay is electrically connected with the positive electrode of the control power supply, and the other end of the second normally open contact of the non-electric quantity protection relay is electrically connected with a brake separating terminal of the microcomputer integrated protection device.
Optionally, the microcomputer integrated protection device further comprises a second hard pressing plate, wherein the second hard pressing plate is arranged on a circuit that the other end of the second normally open contact of the non-electric quantity protection relay is electrically connected with the opening terminal of the microcomputer integrated protection device.
Optionally, the microcomputer comprehensive protection device further comprises a low backup jump relay, wherein one end of a third normally open contact of the low backup jump relay is electrically connected with the positive electrode of the control power supply, and the other end of the third normally open contact of the low backup jump relay is electrically connected with a tripping protection terminal of the microcomputer comprehensive protection device.
Optionally, the circuit further comprises a third hard pressing plate, wherein the third hard pressing plate is arranged on a circuit, which is electrically connected with the trip protection terminal of the microcomputer comprehensive protection device, of the other end of the third normally open contact of the low backup trip relay.
Optionally, the microcomputer comprehensive protection device further comprises a high backup trip relay, wherein one end of a fourth normally open contact of the high backup trip relay is electrically connected with the positive electrode of the control power supply, and the other end of the fourth normally open contact of the high backup trip relay is electrically connected with a trip protection terminal of the microcomputer comprehensive protection device.
Optionally, the circuit comprises a fourth hard pressing plate, wherein the fourth hard pressing plate is arranged on a circuit which is electrically connected with the trip protection terminal of the microcomputer comprehensive protection device and the other end of the fourth normally open contact of the high backup trip relay.
Optionally, the switching circuit further comprises a second switch, wherein one end of the second switch is electrically connected with the negative electrode of the control power supply, and the other end of the second switch is electrically connected with the switching circuit and the switching circuit respectively.
Optionally, the positive terminal of the microcomputer integrated protection device is electrically connected with the positive electrode of the control power supply, and the negative terminal of the microcomputer integrated protection device is electrically connected with the negative electrode of the control power supply.
The high-voltage switch cabinet provided by the utility model has the following beneficial effects:
the circuit breaker comprises a closing loop and a switching-off loop, wherein one end of the closing loop is electrically connected with the closing terminal of the microcomputer comprehensive protection device, the other end of the closing loop is electrically connected with the negative electrode of the control power supply, and one end of the switching-off loop is electrically connected with the switching-off terminal of the microcomputer comprehensive protection device, the other end of the switching-off loop is electrically connected with the negative electrode of the control power supply, so that when a tripping command of a main protection function is obtained, the differential protection relay acts, the switching-on point of the differential protection relay responsible for main protection tripping is switched on, an electric signal enters the switching-off loop of the circuit breaker, and a switching-off coil of the switching-off loop of the circuit breaker is electrically used for executing the switching-off action.
Drawings
FIG. 1 is a schematic diagram of a prior art high voltage switchgear circuit of the present utility model;
fig. 2 is a schematic circuit diagram of a high voltage switchgear in an embodiment of the utility model.
Reference numerals illustrate:
100-microcomputer comprehensive protection device; 200-circuit breaker.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a high-voltage switch cabinet in an embodiment of the present utility model, where the high-voltage switch includes a control power source, a microcomputer integrated protection device 100, a circuit breaker 200, and a differential protection relay, where the circuit breaker 200 includes a switching-on loop and a switching-off loop, one end of the switching-on loop is electrically connected to a switching-on terminal D12 of the microcomputer integrated protection device 100, the other end of the switching-off loop is electrically connected to a negative electrode of the control power source, one end of the switching-off loop is electrically connected to a switching-off terminal D09 of the microcomputer integrated protection device 100, the other end of the switching-off loop is electrically connected to a negative electrode of the control power source, and one end of a first normally open contact C09 of the differential protection relay is electrically connected to a positive electrode of the control power source, and the other end of the first normally open contact C10 is electrically connected to a switching-off terminal D09 of the microcomputer integrated protection device 100.
By electrically connecting one end of the first normally open contact C09, C10 of the differential protection relay with the positive electrode of the control power supply and the other end of the first normally open contact is electrically connected with the opening terminal D09 of the microcomputer integrated protection device 100, the circuit breaker 200 comprises a switching-on loop and a switching-off loop, one end of the switching-on loop is electrically connected with the switching-on terminal D12 of the microcomputer integrated protection device 100 and the other end of the switching-off loop is electrically connected with the negative electrode of the control power supply, and one end of the switching-off loop is electrically connected with the switching-off terminal D09 of the microcomputer integrated protection device 100 and the other end of the switching-off loop is electrically connected with the negative electrode of the control power supply.
Referring to fig. 2, the high-voltage switch cabinet further includes a non-electric quantity protection relay, one end of a second normally open contact C11, C12 of the non-electric quantity protection relay is electrically connected with the positive electrode of the control power supply, and the other end of the second normally open contact is electrically connected with a brake-separating terminal D09 of the microcomputer integrated protection device 100. When a tripping command of a main protection function is obtained, the non-electric quantity protection relay acts, the non-electric quantity protection relay responsible for main protection tripping is connected with C11 and C12 points, an electric signal enters a breaking circuit of the breaker 200, and a breaking coil of the breaking circuit of the breaker 200 is electrified to execute breaking action.
In this embodiment, the differential protection relay circuit and the non-electric quantity protection relay circuit are collectively referred to as a main protection circuit.
Referring to fig. 2, the high-voltage switch cabinet further includes a low backup trip relay, and one end of a third normally open contact C07, C08 of the low backup trip relay is electrically connected with the positive electrode of the control power supply, and the other end is electrically connected with a trip protection terminal D07 of the microcomputer integrated protection device 100.
Referring to fig. 2, the high-voltage switch cabinet further includes a high backup trip relay, and one end of a fourth normally open contact C05, C06 of the high backup trip relay is electrically connected to the positive electrode of the control power supply, and the other end is electrically connected to the trip protection terminal D07 of the microcomputer integrated protection device 100.
Referring to fig. 2, the high voltage switch cabinet further includes a first hard pressing plate, and the first hard pressing plate is disposed on a circuit where the other end of the first normally open contact C09, C10 of the differential protection relay is electrically connected to the opening terminal D09 of the microcomputer integrated protection device 100. Specifically, one end of the first hard pressing plate is electrically connected to the first normally open contacts C09, C10 of the differential protection relay, and the other end is electrically connected to the opening terminal D09 of the microcomputer integrated protection device 100.
Referring to fig. 2, the high-voltage switch cabinet further includes a second hard pressing plate, where the second hard pressing plate is disposed on a circuit where the other end of the second normally open contact C11, C12 of the non-electric quantity protection relay is electrically connected to the opening terminal D09 of the microcomputer integrated protection device 100. Specifically, one end of the second hard pressing plate is electrically connected with the second normally open contacts C11 and C12 of the non-electric quantity protection relay, and the other end of the second hard pressing plate is electrically connected with the opening terminal D09 of the microcomputer integrated protection device 100.
Referring to fig. 2, the high voltage switchgear further includes a third hard pressing plate disposed on a circuit where the other end of the third normally open contact C07, C08 of the low backup jump relay is electrically connected to the trip protection terminal D07 of the microcomputer integrated protection device 100. Specifically, one end of the third hard pressing plate is electrically connected with the third normally open contact C07, C08 of the low backup trip relay, and the other end is electrically connected with the trip protection terminal D07 of the microcomputer integrated protection device 100.
Referring to fig. 2, the high-voltage switch cabinet further includes a fourth hard pressing plate disposed on a circuit where the other end of the fourth normally open contact C05, C06 of the high-backup jump relay is electrically connected to the trip protection terminal D07 of the microcomputer integrated protection device 100. Specifically, one end of the third hard pressing plate is electrically connected with the fourth normally open contact C05, C06 of the high backup trip relay, and the other end is electrically connected with the trip protection terminal D07 of the microcomputer integrated protection device 100.
Referring to fig. 2, the high-voltage switch cabinet further includes a first switch, one end of the first switch is electrically connected with the positive electrode of the control power supply, the other end of the first switch is electrically connected with one end of a fourth normally open contact C05, C06 of the high backup jump relay, one end of a third normally open contact C07, C08 of the low backup jump relay, one end of a second normally open contact C11, C12 of the non-electric quantity protection relay, and one end of a first normally open contact C09, C10 of the differential protection relay.
The high-voltage switch cabinet further comprises a second switch SA2, one end of the second switch SA2 is electrically connected with the negative electrode of the control power supply, and the other end of the second switch SA2 is electrically connected with the closing loop and the opening loop respectively.
In this embodiment, the positive terminal B23 of the integrated microcomputer protection device 100 is electrically connected to the positive electrode of the control power supply, and the negative terminal D13 of the integrated microcomputer protection device 100 is electrically connected to the negative electrode of the control power supply.
The circuit breaker 200 communicates with the microcomputer integrated protection device 100 through a signal line.
The working principle of the high-voltage switch cabinet is as follows:
the main protection function is realized: when the main protection function trip command is obtained, the relay acts. The differential protection relay acts, the differential protection relay responsible for main protection tripping is connected with C09 and C10 points, an electric signal enters a brake-separating loop of the circuit breaker 200, and a brake-separating coil of the brake-separating loop of the circuit breaker 200 is electrified to execute brake-separating action; and the non-electric quantity protection relay acts, the non-electric quantity protection relay responsible for main protection tripping is connected with C11 and C12 points, an electric signal enters a breaking loop of the circuit breaker 200, and a breaking coil of the breaking loop of the circuit breaker 200 is electrified to execute breaking action. The circuit breaker 200 feeds back the state of the circuit breaker 200 to the microcomputer integrated protection device 100 through a signal loop after opening the gate, meanwhile, the fault type is judged according to the action point position of the main protection relay, and a message is formed in the microcomputer integrated protection device 100 and is sent to a background control center. Therefore, the state signal and fault type monitoring of the circuit breaker 200 are not affected, and the main protection is ensured to act more reliably while the functions are met.
The backup protection function is realized: the microcomputer integrated protection device 100 turns on the trip protection terminal D07 and the opening terminal D09 through the actions of the low backup trip relay and the high backup trip relay which are responsible for backup protection functions, and turns on the contacts (C05, C06 or C07, C08) corresponding to high backup trip or low backup trip, thereby realizing the opening action of the circuit breaker 200.
The hard pressing plate functions to throw and retract: when the differential protection function is required, the hard platen 1LP is put into operation, and when the non-electric quantity protection function is required, the hard platen 3LP is put into operation, and the other functions are the same, namely the operation is stopped without the need of the function.
The above description is only illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (10)
1. The utility model provides a high tension switchgear, includes control power supply, microcomputer integrated protection device, circuit breaker and differential protection relay, the circuit breaker includes closing circuit and brake release return circuit, the one end of closing circuit with microcomputer integrated protection device's closing terminal electricity is connected, the other end with control power supply's negative pole electricity is connected, brake release return circuit's one end with microcomputer integrated protection device's brake release terminal electricity is connected the other end with control power supply's negative pole electricity is connected, differential protection relay's first normally open contact one end with control power supply's positive pole electricity is connected, its characterized in that, differential protection relay's the other end of first normally open contact with microcomputer integrated protection device's brake release terminal electricity is connected.
2. The high voltage switchgear of claim 1 further comprising a first hard press plate disposed on a circuit where the other end of the first normally open contact is electrically connected to the break terminal.
3. The high-voltage switch cabinet according to claim 1, further comprising a non-electric quantity protection relay, wherein one end of a second normally open contact of the non-electric quantity protection relay is electrically connected with the positive electrode of the control power supply, and the other end of the second normally open contact of the non-electric quantity protection relay is electrically connected with a brake separating terminal of the microcomputer comprehensive protection device.
4. The high-voltage switch cabinet of claim 3, further comprising a second hard pressing plate, wherein the second hard pressing plate is arranged on a circuit that the other end of the second normally open contact of the non-electric quantity protection relay is electrically connected with the opening terminal of the microcomputer integrated protection device.
5. The high-voltage switch cabinet according to claim 1, further comprising a low backup trip relay, wherein one end of a third normally open contact of the low backup trip relay is electrically connected with the positive electrode of the control power supply, and the other end of the third normally open contact of the low backup trip relay is electrically connected with a trip protection terminal of the microcomputer integrated protection device.
6. The high voltage switchgear of claim 5 further comprising a third hard pressure plate disposed on a circuit of the low backup trip relay having the other end of the third normally open contact electrically connected to a trip protection terminal of the microcomputer integrated protection device.
7. The high voltage switch cabinet of claim 1, further comprising a high backup trip relay, wherein one end of a fourth normally open contact of the high backup trip relay is electrically connected to the positive pole of the control power supply and the other end is electrically connected to a trip protection terminal of the microcomputer integrated protection device.
8. The high voltage switchgear of claim 7 comprising a fourth hard pressure plate disposed on a circuit of the high backup trip relay having the other end of the fourth normally open contact electrically connected to a trip protection terminal of the microcomputer integrated protection device.
9. The high-voltage switch cabinet of claim 1, further comprising a second switch, wherein one end of the second switch is electrically connected to a negative electrode of the control power supply, and the other end of the second switch is electrically connected to the closing circuit and the opening circuit, respectively.
10. The high-voltage switch cabinet according to claim 1, wherein a positive terminal of the microcomputer integrated protection device is electrically connected to a positive electrode of the control power supply, and a negative terminal of the microcomputer integrated protection device is electrically connected to a negative electrode of the control power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320936269.5U CN220066876U (en) | 2023-04-24 | 2023-04-24 | High-voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320936269.5U CN220066876U (en) | 2023-04-24 | 2023-04-24 | High-voltage switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220066876U true CN220066876U (en) | 2023-11-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320936269.5U Active CN220066876U (en) | 2023-04-24 | 2023-04-24 | High-voltage switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220066876U (en) |
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2023
- 2023-04-24 CN CN202320936269.5U patent/CN220066876U/en active Active
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