CN219371845U - Open type combined electrical apparatus - Google Patents
Open type combined electrical apparatus Download PDFInfo
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- CN219371845U CN219371845U CN202320568283.4U CN202320568283U CN219371845U CN 219371845 U CN219371845 U CN 219371845U CN 202320568283 U CN202320568283 U CN 202320568283U CN 219371845 U CN219371845 U CN 219371845U
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- switch
- starting resistor
- isolating switch
- bracket
- combined electrical
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Abstract
The utility model relates to the field of flexible power transmission systems, in particular to an open type combined electrical appliance, which comprises a fixed support, a disconnecting switch and a starting resistor, wherein the disconnecting switch and the starting resistor are arranged on the fixed support, a conductive loop of the disconnecting switch is connected with a conductive loop of the starting resistor in parallel, a disconnecting switch conductive knife switch is arranged on the disconnecting switch, the disconnecting switch conductive knife switch is connected with a wire inlet end of the starting resistor, a fixed contact is arranged on the starting resistor, and the fixed contact is connected with a wire outlet end of the starting resistor. The utility model connects the isolating switch conductive loop and the starting resistor conductive loop in parallel to form a combined electrical appliance conductive loop; the isolating switch conducting part and the starting resistor conducting part share an insulating platform; according to the system requirement, a grounding switch can be additionally arranged at the inlet and outlet end of the combined electrical appliance, so that the field safety overhaul and maintenance of the product are realized.
Description
Technical Field
The utility model relates to the field of flexible power transmission systems, in particular to an open type combined electrical appliance.
Background
In a flexible direct current transmission system, when a flexible direct current converter station is connected into a power grid system and is ready to start, a converter valve unit module needs to be charged to working voltage. Because the capacitance of the converter unit is larger, the process of charging a capacitive loop is equivalent to that of switching on an alternating current test breaker, and larger charging current and impulse voltage can be generated in the system at the moment, which can cause damage to system equipment and even generate larger disturbance to a power grid system. In order to limit the rush current generated when the system is put into operation, a start-up resistor loop needs to be provided in the soft-direct-current converter station. When the system is started, the charging current is restrained through a starting resistor; after the start-up process is completed, the start-up resistor is exited to reduce losses.
The existing starting circuit adopts the defects that one open type independent circuit breaker loop is connected in parallel with another open type independent circuit breaker plus starting resistor series loop or one open type independent isolating switch loop is connected in parallel with another open type independent starting resistor loop, and all the devices are independently arranged, so that the cost is high, the occupied area is large and the integration level of the devices is low.
Disclosure of Invention
Aiming at the problem of low equipment integration level in the prior art, the utility model provides an open type combined electrical appliance, which is used for controlling the input and the withdrawal of a starting resistor.
The utility model is realized by the following technical scheme:
the open type combined electrical appliance comprises a fixed support, a disconnecting switch and a starting resistor, wherein the disconnecting switch and the starting resistor are arranged on the fixed support, a conductive loop of the disconnecting switch is connected with a conductive loop of the starting resistor in parallel, a disconnecting switch conductive knife switch is arranged on the disconnecting switch, the disconnecting switch conductive knife switch is connected with a wire inlet end of the starting resistor, a fixed contact is arranged on the starting resistor, and the fixed contact is connected with a wire outlet end of the starting resistor; when closing, the isolating switch conductive knife contacts with the static contact.
Preferably, the fixing bracket comprises a steel bracket, a bottom bracket, a connecting bracket, a first pillar insulator and a second pillar insulator, wherein the bottom bracket is connected with the steel bracket, and the first pillar insulator and the second pillar insulator are arranged on the bottom bracket; the connecting bracket is arranged between the first post insulator and the second insulator; the isolating switch and the starting resistor are connected with the connecting bracket.
Preferably, the isolating switch conductive knife and the starting resistor are both arranged on the connecting bracket.
Preferably, the underframe is arranged at one side of the steel bracket.
Preferably, the isolating switch is further provided with an isolating switch vertical connecting rod and an isolating switch operating mechanism, and the isolating switch vertical connecting rod is arranged on the isolating switch operating mechanism.
Preferably, the electric switch further comprises an operation insulator, one end of the operation insulator is connected with the underframe, the other end of the operation insulator is connected below the conductive knife switch of the isolating switch, and the isolating switch vertical connecting rod is arranged between the isolating switch operation mechanism and the operation insulator.
Preferably, a connecting conductor is arranged between the isolating switch conductive knife and the starting resistor, and the connecting conductor is positioned at one end of the isolating switch conductive knife and one end of the starting resistor, which are close to the connecting bracket.
Preferably, the device further comprises a grounding switch arranged on the underframe, and the grounding switch is connected with the starting resistor.
Preferably, the grounding switch is provided with a grounding switch vertical connecting rod and a grounding switch operating mechanism, one end of the grounding switch vertical connecting rod is connected with the underframe, and the other end of the grounding switch vertical connecting rod is connected below the isolating switch conductive knife; the grounding switch vertical connecting rod is arranged on the grounding switch operating mechanism.
Preferably, a static contact mounting bracket is arranged between the static contact and the starting resistor.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model relates to an open type combined electrical appliance, which is used for inputting and outputting a starting resistor and is formed by combining an isolating switch and the starting resistor. The isolating switch conductive loop and the starting resistor conductive loop are connected in parallel to form a combined electrical appliance conductive loop; the switching-on and switching-off of the isolating switch can realize the input and the withdrawal of the starting resistor.
The utility model relates to an open type combined electrical appliance, which connects an isolating switch conductive loop and a starting resistor conductive loop in parallel to form a combined electrical appliance conductive loop; the isolating switch conductive part and the starting resistor conductive part share one insulating platform, namely a first post insulator and a second post insulator.
The isolating switch conductive knife and the static contact part are respectively connected with the inlet and outlet terminals of the starting resistor to form a common inlet and outlet wiring terminal; according to the system requirement, a grounding switch can be additionally arranged at the inlet and outlet end of the combined electrical appliance, so that the field safety overhaul and maintenance of the product are realized.
When the system loop is put into operation, the isolating switch is in a switching-off state, and the system current passes through the starting resistor loop, and the resistor is put into operation and is used for controlling the starting current when the system is put into operation; after the system is put into operation steadily, the isolating switch is switched on, and because the loop resistance is small, the current bypasses the resistor through the isolating switch, so that the starting resistor is out of operation.
In a starting resistor loop connected with the valve side of the transformer, the bypass switch adopts an isolating switch, the starting resistor is directly connected with the isolating switch in parallel, the starting resistor only works when the system is started, and the isolating switch is switched on and bypasses the starting resistor after the starting is finished, so that the system is started. Meanwhile, in order to further reduce the occupied area of equipment and simplify the arrangement structure of a starting circuit, an open-type combined electrical appliance is formed by the isolating switch and the resistor, and the structural arrangement of the starting circuit is innovated.
Furthermore, the grounding switch is used for facilitating the field safety overhaul and maintenance of the product.
Drawings
Fig. 1 is a front view of the disconnecting switch of embodiment 1 when the disconnecting switch is closed and the grounding switch is opened;
fig. 2 is a side view of the disconnecting switch of embodiment 1 when the disconnecting switch is closed and the grounding switch is opened;
FIG. 3 is a front view of the disconnecting switch and the disconnecting switch of embodiment 1;
FIG. 4 is a side view of the disconnecting switch and the disconnecting switch of embodiment 1;
fig. 5 is a front view of the disconnecting switch and the grounding switch of embodiment 1;
fig. 6 is a side view of the disconnecting switch and the grounding switch of embodiment 1;
FIG. 7 is a top view of the disconnecting switch and the grounding switch of embodiment 1;
FIG. 8 is a front view of the disconnecting switch and the disconnecting switch of embodiment 2;
FIG. 9 is a top view of the disconnecting switch and the grounding switch of embodiment 2;
fig. 10 is a front view of the disconnecting switch of embodiment 2;
fig. 11 is a top view of the disconnecting switch closing and grounding switch opening of embodiment 2.
In the figure, 1, a static contact; 2. isolating switch conductive knife switch; 3. a grounding switch; 4. a first post insulator; 5. a grounding switch operating mechanism; 6. a steel bracket; 7. a chassis; 8. a second post insulator; 9. a connecting bracket; 10. a connection conductor; 11. starting a resistor; 12. a static contact mounting bracket; 13. an isolating switch operating mechanism; 14. isolating switch vertical connecting rod; 15. operating the insulator; 16. the grounding switch is vertical to the connecting rod.
Detailed Description
The utility model will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the utility model.
The isolating switch is a switching device without a special arc extinguishing device, and requires a break which is obviously visible in a switching-off state, and can reliably pass normal working current and short-circuit fault current in a switching-on state. When the switch is in the switch-off position, the contacts have insulation distance meeting the specified requirement and obvious switch-off marks; and a switching device capable of carrying current under normal loop conditions and current under abnormal conditions (such as short circuit) within a specified time when the switching device is in a switching-on position.
Example 1
The utility model discloses an open type combined electrical appliance, referring to figures 1, 2, 3, 4, 5, 6 and 7, comprising a fixed bracket, a disconnecting switch, a starting resistor 11, an operating insulator 15 and a grounding switch 3, wherein the fixed bracket comprises a steel bracket 6, a bottom bracket 7, a connecting bracket 9, a first post insulator 4 and a second post insulator 8, the bottom bracket 7 is connected to one side of the steel bracket 6, and the first post insulator 4 and the second post insulator 8 are arranged on the bottom bracket 7; the connection bracket 9 is provided between the first post insulator 4 and the second insulator.
The isolating switch and the starting resistor 11 are arranged on the connecting support 9 of the fixed support, the isolating switch is provided with an isolating switch conductive knife 2, an isolating switch vertical connecting rod 14 and an isolating switch operating mechanism 13, the isolating switch conductive knife 2 is arranged on the connecting support 9, the isolating switch conductive knife 2 is connected with the wire inlet end of the starting resistor 11, and the isolating switch vertical connecting rod 14 is arranged on the isolating switch operating mechanism 13. One end of the operation insulator 15 is connected with the underframe 7, the other end is connected below the isolating switch conductive knife 2, and the isolating switch vertical connecting rod 14 is arranged between the isolating switch operation mechanism 13 and the operation insulator 15.
The starting resistor 11 is provided with a fixed contact 1, a fixed contact mounting bracket 12 is arranged between the fixed contact 1 and the starting resistor 11, and the fixed contact 1 is connected with an outlet end of the starting resistor 11; when in closing, the isolating switch conductive knife 2 is contacted with the static contact 1.
A connecting conductor 10 is arranged between the isolating switch conductive knife 2 and the starting resistor 11, and the connecting conductor 10 is positioned at one end of the isolating switch conductive knife 2 and the starting resistor 11 close to the connecting bracket 9.
The ground switch 3 is provided on the chassis 7, and the ground switch 3 is connected to the starting resistor 11. The grounding switch 3 is provided with a grounding switch vertical connecting rod 16 and a grounding switch operating mechanism 5, one end of the grounding switch vertical connecting rod 16 is connected with the underframe 7, and the other end is connected below the isolating switch conductive knife 2; the ground switch vertical link 16 is mounted on the ground switch operating mechanism 5.
The conductive loop of the isolating switch is connected in parallel with the conductive loop of the starting resistor 11, and the conductive knife switch and the fixed contact 1 of the isolating switch are respectively connected with the wire inlet end and the wire outlet end of the starting resistor 11.
Example 2
Referring to fig. 8, 9, 10 and 11, the difference from embodiment 1 is that the disconnector adopts a horizontal flip-type disconnector, the starting resistor 11 is mounted on the stationary contact 1, the stationary contact 1 is mounted on the first post insulator 4, the grounding switch 3 and the grounding switch vertical link 16 are mounted on the steel bracket 6, the grounding switch vertical link 16 is mounted between the grounding switch 3 and the grounding switch operating mechanism 5, the disconnector conductive blade 2 is mounted on the operating insulator 15, the disconnector operating mechanism 13 are mounted on the steel bracket 6, and the disconnector vertical link 14 is mounted between the operating insulator 15 and the disconnector operating mechanism 13.
In the open type combined electrical appliance, in a starting resistor 11 loop connected with a transformer valve side, a bypass switch adopts an isolating switch, the starting resistor 11 is directly connected with the isolating switch in parallel, the starting resistor 11 only works when a system is started, and the isolating switch is switched on and bypasses the starting resistor 11 after the system is started, so that the system is started. Meanwhile, in order to further reduce the occupied area of equipment and simplify the arrangement structure of a starting circuit, an open-type combined electrical appliance is formed by the isolating switch and the resistor, and the structural arrangement of the starting circuit is innovated.
When the system is put into operation and the starting resistor 11 is required to work, the isolating switch is in a switching-off state, and the resistor can effectively limit the starting current of the system; when the system is stable and the resistor 11 does not need to be started to work, the isolating switch operating mechanism 13 is operated, and the isolating switch is switched on to conduct the system loop, so that the resistor is stopped from working. When the combined electrical appliance needs to be overhauled, the grounding switch operating mechanism 5 is operated, and the grounding switch 3 is switched on. When not overhauling, the grounding switch 3 is in the opening position.
The foregoing description of the preferred embodiment of the present utility model is not intended to limit the technical solution of the present utility model in any way, and it should be understood that the technical solution can be modified and replaced in several ways without departing from the spirit and principle of the present utility model, and these modifications and substitutions are also included in the protection scope of the claims.
Claims (10)
1. The open type combined electrical appliance is characterized by comprising a fixed support, an isolating switch and a starting resistor (11), wherein the isolating switch and the starting resistor (11) are arranged on the fixed support, a conductive loop of the isolating switch is connected with a conductive loop of the starting resistor (11) in parallel, an isolating switch conductive knife switch (2) is arranged on the isolating switch, the isolating switch conductive knife switch (2) is connected with a wire inlet end of the starting resistor (11), a fixed contact (1) is arranged on the starting resistor (11), and the fixed contact (1) is connected with a wire outlet end of the starting resistor (11); when in closing, the isolating switch conductive knife (2) is contacted with the static contact (1).
2. The open-type electrical combiner according to claim 1, characterized in that the fixing bracket comprises a steel bracket (6), a chassis (7), a connecting bracket (9), a first post insulator (4) and a second post insulator (8), the chassis (7) being connected to the steel bracket (6), the first post insulator (4) and the second post insulator (8) being mounted on the chassis (7); the connecting bracket (9) is arranged between the first post insulator (4) and the second insulator; the isolating switch and the starting resistor (11) are connected with the connecting bracket (9).
3. Open-type electrical combiner according to claim 2, characterized in that the disconnector conducting blade (2) and the starting resistor (11) are mounted on a connection bracket (9).
4. An open-type electrical combiner according to claim 2, characterized in that the chassis (7) is arranged on one side of the steel bracket (6).
5. The open-type combined electrical appliance according to claim 2, wherein the isolating switch is further provided with an isolating switch vertical connecting rod (14) and an isolating switch operating mechanism (13), and the isolating switch vertical connecting rod (14) is mounted on the isolating switch operating mechanism (13).
6. The open-type combined electrical appliance according to claim 5, further comprising an operation insulator (15), wherein one end of the operation insulator (15) is connected with the chassis (7), the other end is connected below the isolating switch conductive knife (2), and the isolating switch vertical connecting rod (14) is arranged between the isolating switch operation mechanism (13) and the operation insulator (15).
7. The open-type combined electrical appliance according to claim 2, wherein a connecting conductor (10) is arranged between the isolating switch conductive knife (2) and the starting resistor (11), and the connecting conductor (10) is positioned at one end of the isolating switch conductive knife (2) and the starting resistor (11) close to the connecting bracket (9).
8. The open-type electrical combiner according to claim 2, further comprising a grounding switch (3) arranged on the chassis (7), the grounding switch (3) being connected to the starting resistor (11).
9. The open type combined electrical appliance according to claim 8, wherein the grounding switch (3) is provided with a grounding switch vertical connecting rod (16) and a grounding switch operating mechanism (5), one end of the grounding switch vertical connecting rod (16) is connected with the underframe (7), and the other end is connected below the isolating switch conductive knife switch (2); the grounding switch vertical connecting rod (16) is arranged on the grounding switch operating mechanism (5).
10. The open-type combined electrical appliance according to claim 1, wherein a stationary contact mounting bracket (12) is arranged between the stationary contact (1) and the starting resistor (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320568283.4U CN219371845U (en) | 2023-03-21 | 2023-03-21 | Open type combined electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320568283.4U CN219371845U (en) | 2023-03-21 | 2023-03-21 | Open type combined electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219371845U true CN219371845U (en) | 2023-07-18 |
Family
ID=87117316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320568283.4U Active CN219371845U (en) | 2023-03-21 | 2023-03-21 | Open type combined electrical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219371845U (en) |
-
2023
- 2023-03-21 CN CN202320568283.4U patent/CN219371845U/en active Active
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