CN218678539U - Box-type transformer double-loop power supply safety conversion device - Google Patents
Box-type transformer double-loop power supply safety conversion device Download PDFInfo
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- CN218678539U CN218678539U CN202222972122.XU CN202222972122U CN218678539U CN 218678539 U CN218678539 U CN 218678539U CN 202222972122 U CN202222972122 U CN 202222972122U CN 218678539 U CN218678539 U CN 218678539U
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Abstract
The utility model provides a case becomes two return circuit power safety conversion equipment, including emergency power source socket cabinet body (3) and main loop cabinet body (4), main loop switch divide-shut brake circuit sets up in main loop cabinet body, and emergency power source socket auxiliary contact sets up in emergency power source socket cabinet body, and emergency power source socket cabinet body and main loop cabinet body all are equipped with cabinet door (5), are equipped with the procedure lock (6) that keep mechanical interlocking on two cabinet doors respectively; a travel switch is arranged in an auxiliary contact of the emergency power socket, and the travel switch and a main circuit switch opening and closing circuit keep electric interlocking; a safety gap d is formed between the main loop copper bar and the outgoing line load main bus copper bar; and a detachable isolating copper bar is arranged between the main loop copper bar and the outgoing line load main bus copper bar. The utility model discloses based on mechanical interlocking, the safety transformation between main loop switch and the emergency power supply return circuit is realized to the multiple protection of mechanisms such as electric interlocking and isolation copper bar, guarantees emergency power supply operating personnel's personal safety.
Description
Technical Field
The utility model relates to a case becomes technical field, especially relates to a case becomes double-circuit power safety conversion equipment.
Background
In the operation process of the existing box-type substation, a high-voltage main loop and a transformer may break down due to various reasons to cause power failure, so that a low-voltage outgoing line load suddenly stops supplying power, and loss is caused. In order to shorten the power failure time and not influence the operation of low-voltage outlet equipment, uninterrupted power supply to a load is usually realized by connecting an emergency power supply. However, because the electrical interlocking contact in the existing emergency power socket is more reliable without a mechanical interlocking device, the main power circuit switch still has the possibility of sudden 'secondary' power transmission, and certain potential safety hazard exists.
Chinese patent literature discloses "a case becomes anti-falling power transmission circuit of emergency power supply", and its bulletin number is CN 217282357U, and this utility model discloses a power-off circuit through setting up the socket auxiliary contact looks electric interlocking with emergency power supply, the power-off circuit is connected with the main loop in the case becomes, makes emergency power supply's socket auxiliary contact switch-on when emergency power supply's socket inserts, then makes the main loop outage in the case becomes to can prevent falling the power transmission. However, in the utility model, the electric interlock has unreliable contacts, intermediate relays, opening coils and the like in the loop, so that the misoperation of operators can occur, and the potential safety hazard still exists.
SUMMERY OF THE UTILITY MODEL
In view of the above prior art's shortcoming, the utility model aims to provide a case becomes double-circuit power supply safety conversion equipment is used for solving current case and becomes when having a power failure because of the trouble, has the problem of potential safety hazard in emergency power source and the main power source return circuit conversion process specially.
To achieve the above and other related objects, the present invention provides a solution including the following features.
The utility model provides a case becomes two return circuit power safety conversion equipment, including transformer, main loop switch divide-shut brake circuit, load switch return circuit and emergency power socket circuit of being qualified for the next round of competitions, main loop switch divide-shut brake circuit is connected with the main loop copper bar, load switch return circuit that is qualified for the next round of competitions is connected with load main bus-bar copper bar of being qualified for the next round of competitions, emergency power socket circuit is equipped with emergency power socket auxiliary contact, still includes the emergency power socket cabinet body and the main loop cabinet body, main loop switch divide-shut brake circuit sets up in the main loop cabinet body, emergency power socket auxiliary contact sets up in emergency power socket cabinet body, emergency power socket cabinet body and main loop cabinet body all are equipped with the cabinet door, are equipped with the program lock that keeps main loop switch divide-shut brake circuit and emergency power socket circuit mechanical interlocking on two cabinet doors respectively; a travel switch is arranged in the auxiliary contact of the emergency power socket, and the travel switch and the main loop switch are electrically interlocked; a safety gap d is formed between the main loop copper bar and the outgoing line load main bus copper bar; and a detachable isolating copper bar is arranged between the main loop copper bar and the outgoing line load main bus copper bar.
The utility model discloses a case becomes two return circuits power safety conversion equipment based on according to the mechanical interlocking of "procedure lock" (two locks one key) of certain procedure operation, only when the main loop switch divide-shut brake circuit is in the branch floodgate position, the key on the cabinet door of the main loop cabinet body can only be extracted out, just can open the cabinet door of the emergency power socket cabinet body, insert the emergency power socket, continue to supply power to the low pressure side load; otherwise, only when the emergency power supply socket is pulled out and the cabinet door of the emergency power supply socket cabinet body is closed, the key can be pulled out, and the program lock on the cabinet door of the main loop cabinet body can be opened, so that the opening and closing circuit of the main loop switch is positioned at the closing position, and the power supply of the main loop is realized; in addition, still through at secondary circuit auxiliary design electric interlocking and isolation copper bar, further protection realizes the return circuit safety switching between main loop switch and the emergency power supply return circuit to guarantee emergency power supply operating personnel's personal safety.
Preferably, the auxiliary contact of the emergency power socket is connected in series with the switching-on and switching-off circuit of the main circuit switch, a socket connecting copper bar is arranged between the auxiliary contact of the emergency power socket and the outgoing line load main bus copper bar, and the auxiliary contact of the emergency power socket is connected with the outgoing line load main bus copper bar through the socket connecting copper bar.
Preferably, the auxiliary contact of the emergency power socket consists of an a-phase auxiliary contact, a B-phase auxiliary contact, a C-phase auxiliary contact and an N-phase auxiliary contact which are connected in parallel.
Preferably, the a-phase auxiliary contact, the B-phase auxiliary contact and the C-phase auxiliary contact are respectively connected with the outgoing line load main bus copper bar through socket connection copper bars, and the N-phase auxiliary contact is connected with a neutral point of the transformer.
Preferably, four travel switches are respectively arranged in the A-phase auxiliary contact, the B-phase auxiliary contact, the C-line auxiliary contact and the N-line auxiliary contact, a secondary auxiliary contact is arranged in each travel switch, and the secondary auxiliary contacts are connected in parallel and then connected in series with the switching-on and switching-off loop of the main loop switch.
In above-mentioned technical scheme, be equipped with travel switch in the emergency power socket auxiliary contact, travel switch is equipped with the secondary auxiliary contact of a normally open and normally closed, and this secondary auxiliary contact is a passive contact, and when operating personnel inserted the plug into emergency power socket, this secondary auxiliary contact can realize the automatic switching of contact state to outwards signal. When the plug is inserted into the emergency power socket with travel switch, its auxiliary contact completes the contact conversion, and triggers the secondary auxiliary contact to connect into the separating brake loop of the low-voltage incoming switch or the high-voltage outgoing switch, so as to cut off the low-voltage incoming switch or the high-voltage outgoing switch, and then to cut off the main loop switch of the high-voltage cabinet, thus ensuring that the emergency power supply and the main loop only have one loop to supply power, avoiding the possibility of sudden 'second' power transmission of the main power supply, and realizing the electric interlocking protection function.
Preferably, an intermediate relay is arranged in the main circuit switch opening and closing circuit, and the secondary auxiliary contacts are connected in parallel and then connected with the contacts of the intermediate relay. The intermediate relay has higher sensitivity, and the intermediate relay and the travel switch cooperate to further improve the conversion safety between the main circuit switch and the emergency power supply circuit, so that the occurrence of electricity utilization safety accidents caused by illegal operations such as mistaken collision of operators is avoided.
Preferably, the isolated copper bar consists of an A isolated copper bar, a B isolated copper bar, a C isolated copper bar and an N isolated copper bar, one end of the A isolated copper bar, one end of the B isolated copper bar and one end of the C isolated copper bar are connected with the outgoing line load main bus copper bar, the other end of the B isolated copper bar and the other end of the C isolated copper bar are connected with the main loop copper bar, and the N isolated copper bar is connected with a neutral point of the transformer.
Preferably, the single isolating copper bar is in an L-shaped structure.
Preferably, an insulating cover plate 17 is arranged outside the auxiliary contact of the emergency power socket; the single isolating copper bar is of a Z-shaped structure, one end of each of the A isolating copper bar, the B isolating copper bar, the C isolating copper bar and the N isolating copper bar is respectively suspended to cover the external surfaces of the A-phase auxiliary contact, the B-phase auxiliary contact, the C-phase auxiliary contact and the N-phase auxiliary contact of the emergency power socket, the A isolating copper bar, the B isolating copper bar and the C isolating copper bar are respectively connected with the main loop copper bar and the outgoing line load main bus copper bar, and the other end of the N isolating copper bar is connected with a neutral point of the transformer. Among the above-mentioned technical scheme, through setting for the isolation copper bar of special construction, form mechanical structure's interference to emergency power socket, must demolish the isolation copper bar and just can open out emergency power socket's insulating cover plate, and then expose emergency power socket auxiliary contact, accomplish and peg graft the operation at emergency power socket with the plug, effectively prevent operating personnel's maloperation, improve the security.
Preferably, the main circuit switch opening and closing circuit is a high-voltage transformer outgoing line switch opening and closing circuit or a low-voltage incoming line switch opening and closing circuit, the high-voltage transformer outgoing line switch opening and closing circuit controls the opening and closing of the circuit through the high-voltage transformer outgoing line switch, and the low-voltage incoming line switch opening and closing circuit controls the opening and closing of the circuit through the low-voltage incoming line switch.
Preferably, the emergency power socket auxiliary contact cabinet body is arranged on the side wall or the top of the main loop cabinet body.
Preferably, the safety clearance d is 20 to 30mm, such as 20 to 25mm and 25 to 30mm.
As above, the utility model discloses a case becomes two return circuit power safety conversion equipment has following beneficial effect: based on the multiple protection of mechanisms such as mechanical interlocking, electrical interlocking and isolation copper bars, the safety conversion between the main loop and the emergency power supply loop is realized, and the personal safety of emergency power supply operators is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a box-to-box dual-circuit power supply safety conversion device in embodiment 1.
Fig. 2 is a schematic view showing a connection structure of the isolated copper bars in embodiment 1.
Fig. 3 is a schematic structural diagram of the box-to-box dual-circuit power safety switching device in embodiment 2.
Fig. 4 is a schematic view showing a connection structure of the isolated copper bar in embodiment 2.
Fig. 5 is a circuit diagram showing the travel switches of embodiment 1 and embodiment 2.
The reference numbers illustrate: 1. a main loop copper bar; 2. an outgoing line load main bus copper bar; 3. an emergency power socket cabinet body; 4. a main circuit cabinet body; 5. a cabinet door; 6. a program lock; 7. the socket is connected with the copper bar; 8. a line auxiliary contact; 9. b line auxiliary contact; 10. c line auxiliary contact; 11. n auxiliary contacts; 12. an intermediate relay; 13. a, isolating a copper bar; 14. b, isolating copper bars; 15. c, isolating the copper bars; 16. n is an isolated copper bar; 17. an insulating cover plate; 18. connecting copper bars; 19. the main loop switch is used for switching on and off the loop; XKA to XKN secondary auxiliary contact.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 5. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical changes.
Example 1
As shown in fig. 1 and fig. 2, this embodiment provides a box-to-box dual-circuit power safety conversion device, which includes a transformer, a main circuit switch opening and closing circuit 19 (high-voltage transformer outgoing switch opening and closing circuit), an outgoing line load switch circuit, an emergency power socket circuit, a main circuit cabinet 4, and an emergency power socket cabinet 3 disposed on a side surface of the main circuit cabinet, where the high-voltage transformer outgoing line switch opening and closing circuit is connected with a main circuit copper bar 1, the outgoing line load switch circuit is connected with an outgoing line load main bus copper bar 2, and the emergency power socket circuit is provided with an emergency power socket auxiliary contact composed of an a-phase auxiliary contact 8, a b-phase auxiliary contact 9, a c-phase auxiliary contact 10, and an N-phase auxiliary contact 11, which are connected in parallel. The high-voltage transformer outgoing line switch opening and closing circuit is arranged in the main circuit cabinet body, the emergency power socket auxiliary contact is arranged in the emergency power socket cabinet body, the emergency power socket cabinet body and the main circuit cabinet body are both provided with cabinet doors 5, and program locks 6 for keeping the high-voltage transformer outgoing line switch opening and closing circuit and the emergency power socket circuit mechanically interlocked are respectively arranged on the two cabinet doors; a travel switch is arranged in the auxiliary contact of the emergency power socket, and the travel switch and the main loop switch are electrically interlocked; a safety gap d of 20mm is formed between the main loop copper bar and the outgoing line load main bus copper bar; and a detachable isolating copper bar is arranged between the main loop copper bar and the outgoing line load main bus copper bar.
As shown in fig. 2, a "Z" shaped socket connecting copper bar 7 is arranged between the auxiliary contact of the emergency power socket (exemplified by the auxiliary contact 8 of the a phase) and the main bus copper bar of the outgoing line load, and the auxiliary contact of the emergency power socket (exemplified by the auxiliary contact 8 of the a phase) is connected with the main bus copper bar 2 of the outgoing line load through the socket connecting copper bar. The isolating copper bar is composed of an A isolating copper bar 13, a B isolating copper bar 14, a C isolating copper bar 15 and an N isolating copper bar 16, a single isolating copper bar is of an L-shaped structure, the A isolating copper bar is connected with an outgoing line load main bus copper bar 2 at one end, the other end is connected with a main circuit copper bar, and the N isolating copper bars are connected with a neutral point of a transformer.
As shown in fig. 5, travel switches are respectively arranged in the a-phase auxiliary contact, the B-phase auxiliary contact, the C-phase auxiliary contact and the N-phase auxiliary contact, a secondary auxiliary contact is arranged in each travel switch, which is respectively a secondary auxiliary contact XKA, a secondary auxiliary contact XKB, a secondary auxiliary contact XKC, a secondary auxiliary contact XKN, an intermediate relay 12 is arranged in the high-voltage transformer outgoing line switch switching-on and switching-off circuit, the secondary auxiliary contact XKA, the secondary auxiliary contact XKB, the secondary auxiliary contact XKC, and the secondary auxiliary contact XKN are connected in parallel with each other and then connected with the contact of the intermediate relay, so as to realize the series connection with the high-voltage transformer outgoing line switch switching-on and switching-off circuit.
The specific principle of the box-type transformer double-loop power supply safety conversion device of the embodiment is as follows: when the box-type substation is in operation, the high-voltage main circuit switch and the transformer suddenly stop power due to faults, at the moment, the low-voltage outgoing line load needs to be connected with an emergency power supply to continue supplying power, and the safety conversion from the main circuit power supply to an emergency power supply circuit is carried out according to the following steps:
closing the high-voltage transformer outgoing switch to enable the high-voltage transformer outgoing switch opening and closing circuit to be located at a brake separating position, extracting a key of a program lock installed on a cabinet door of a main circuit cabinet body, opening the cabinet door of an emergency power socket cabinet body, and correspondingly inserting plugs into emergency power socket auxiliary contacts with travel switches respectively: the method comprises the following steps that A-phase auxiliary contact 8, B-phase auxiliary contact 9, C-phase auxiliary contact 10 and N-phase auxiliary contact 11 are connected into a high-voltage transformer outgoing line switch opening and closing circuit in a triggering mode, so that current passing through the high-voltage transformer outgoing line switch is abnormal, the high-voltage transformer outgoing line switch is disconnected, and the main circuit of the high-voltage cabinet is guaranteed to be powered off secondarily; and (3) removing the L-shaped isolation copper bar between the main circuit copper bar and the outgoing line load main bus copper bar, wherein a safety gap of 20mm is formed between the main circuit copper bar and the outgoing line load main bus copper bar, and the power failure of a main circuit switch is ensured for three times, so that the safe power supply of the emergency power supply circuit is realized.
Example 2
As shown in fig. 3 and 4, this embodiment provides a box-to-box dual-circuit power safety conversion device, which includes a transformer, a main circuit switch switching-on/off circuit (low-voltage incoming switch switching-on/off circuit), an outgoing line load switch circuit, an emergency power socket circuit, a main circuit cabinet 4, and an emergency power socket cabinet 3 disposed on the top of the main circuit cabinet, where the high-voltage transformer outgoing line switch switching-on/off circuit is connected with a main circuit copper bar 1, the outgoing line load switch circuit is connected with an outgoing line load main bus copper bar 2, the emergency power socket circuit is provided with an emergency power socket auxiliary contact composed of an a-phase auxiliary contact 8, a b-phase auxiliary contact 9, a c-phase auxiliary contact 10, and an N-phase auxiliary contact 11, which are connected in parallel, and an insulating cover 17 is disposed outside each auxiliary contact. The low-voltage incoming switch opening and closing circuit is arranged in the main circuit cabinet body, the emergency power socket auxiliary contact is arranged in the emergency power socket cabinet body, the emergency power socket cabinet body and the main circuit cabinet body are both provided with cabinet doors 5, and the two cabinet doors are respectively provided with a program lock 6 for keeping the high-voltage transformer outgoing switch opening and closing circuit and the emergency power socket circuit mechanically interlocked; a travel switch is arranged in the auxiliary contact of the emergency power socket, and the travel switch and the main loop switch are electrically interlocked; a safety gap d of 25mm is formed between the main loop copper bar and the outgoing line load main bus copper bar; and a detachable isolating copper bar is arranged between the main loop copper bar and the outgoing line load main bus copper bar.
As shown in fig. 4, an inverted U-shaped socket connecting copper bar 7 is arranged between the auxiliary contact of the emergency power socket and the outgoing load main bus copper bar, and the auxiliary contact of the emergency power socket is connected with the outgoing load main bus copper bar through the socket connecting copper bar. The isolation copper bar is composed of an A isolation copper bar 13, a B isolation copper bar 14, a C isolation copper bar 15 and an N isolation copper bar 16, a single isolation copper bar is of a Z-shaped structure, the A isolation copper bar, the B isolation copper bar and one end of the C isolation copper bar respectively cover the A-phase auxiliary contact, the B-phase auxiliary contact, the C-phase auxiliary contact and the outer surface of the N-phase auxiliary contact (when the isolation copper bar is not removed, an insulating cover plate 17 cannot be opened), and two sides of the other end are respectively connected with the main loop copper bar and the outgoing line load main bus copper bar. Wherein, the main loop copper bar is "L" shape structure, for the installation of the isolation copper bar of cooperation "Z" shape structure, the tip of the load main bus copper bar of being qualified for the next round of competitions is equipped with connection copper bar 18, has that safe clearance d is 25mm between connection copper bar and the main loop copper bar.
As shown in fig. 5, the a-phase auxiliary contact, the B-phase auxiliary contact, the C-phase auxiliary contact and the N-phase auxiliary contact are respectively provided with a travel switch therein, each travel switch is provided with a secondary auxiliary contact, which is respectively a secondary auxiliary contact XKA, a secondary auxiliary contact XKB, a secondary auxiliary contact XKC, a secondary auxiliary contact XKN, an intermediate relay 12 is arranged in the low-voltage incoming switch opening and closing circuit, the secondary auxiliary contact XKA, the secondary auxiliary contact XKB, the secondary auxiliary contact XKC, and the secondary auxiliary contacts XKN are connected in parallel with each other and then connected with the contacts of the intermediate relay, so as to realize series connection with the low-voltage incoming switch opening and closing circuit.
The specific principle of the box-type transformer double-loop power supply safety conversion device of the embodiment is as follows: when the box-type substation is in the operation process, the high-voltage main circuit switch and the transformer suddenly stop power due to faults, at the moment, the low-voltage outgoing line load needs to be connected with an emergency power supply to continue supplying power, and the safety conversion from the power supply of the main circuit switch to the power supply circuit of the emergency power supply is carried out according to the following steps:
close low-voltage inlet wire switch and make low-voltage inlet wire switch divide-shut brake circuit be in the branch floodgate position, extract the key of the procedure lock of installation on the cabinet door of the main loop cabinet body, open the cabinet door of the emergency power socket cabinet body, remove unsettled "Z" shape isolation copper bar that covers on the emergency power socket auxiliary contact, expose emergency power socket's insulating cover board 17, the safety clearance that has 25mm between main loop copper bar and the main generating line copper bar of outgoing line load this moment, ensure the main loop outage, then open insulating cover board 17, correspond the plug respectively and insert the emergency power socket auxiliary contact that has travel switch: the A-phase auxiliary contact 8, the B-phase auxiliary contact 9, the C-phase auxiliary contact 10 and the N-phase auxiliary contact 11 are triggered to be connected into a low-voltage incoming switch opening and closing circuit, so that current passing through the low-voltage incoming switch is abnormal, the low-voltage incoming switch is disconnected, a main circuit switch of the high-voltage cabinet is powered off, and safe power supply of the emergency power supply circuit is achieved.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A box-transformer double-loop power supply safety conversion device comprises a transformer, a main loop switch opening and closing loop (19), an outgoing line load switch loop and an emergency power supply socket loop, wherein the main loop switch opening and closing loop is connected with a main loop copper bar (1), the outgoing line load switch loop is connected with an outgoing line load main bus bar (2), the emergency power supply socket loop is provided with an emergency power supply socket auxiliary contact, the box-transformer double-loop power supply safety conversion device is characterized by further comprising an emergency power supply socket cabinet body (3) and a main loop cabinet body (4), the main loop switch opening and closing loop is arranged in the main loop cabinet body, the emergency power supply socket auxiliary contact is arranged in the emergency power supply socket cabinet body, the emergency power supply socket cabinet body and the main loop cabinet body are respectively provided with a cabinet door (5), and program locks (6) for keeping the main loop switch opening and closing loop and the emergency power supply socket loop mechanically interlocked are respectively arranged on the two cabinet doors; a travel switch is arranged in the auxiliary contact of the emergency power socket, and the travel switch and the main loop switch are electrically interlocked; a safety gap d is formed between the main loop copper bar and the outgoing line load main bus copper bar; and a detachable isolating copper bar is arranged between the main loop copper bar and the outgoing line load main bus copper bar.
2. The box-to-box dual-loop power safety switching device according to claim 1, wherein the emergency power socket auxiliary contact is connected in series with the main loop switch opening and closing loop, a socket connecting copper bar (7) is arranged between the emergency power socket auxiliary contact and the outgoing line load main bus copper bar, and the emergency power socket auxiliary contact and the outgoing line load main bus copper bar are connected through the socket connecting copper bar.
3. The box-type transformer double-circuit power supply safety conversion device according to claim 2, characterized in that the emergency power socket auxiliary contact is composed of an A-phase auxiliary contact (8), a B-phase auxiliary contact (9), a C-phase auxiliary contact (10) and an N-phase auxiliary contact (11) which are connected in parallel with each other.
4. The box-type transformer double-circuit power supply safety conversion device as claimed in claim 3, wherein the A-phase auxiliary contact, the B-phase auxiliary contact and the C-phase auxiliary contact are respectively connected with the outgoing line load main bus copper bar through socket connecting copper bars, and the N-phase auxiliary contact is connected with a neutral point of a transformer.
5. The box-type substation double-loop power supply safety conversion device according to claim 3, wherein four travel switches are respectively arranged in the A-phase auxiliary contact, the B-phase auxiliary contact, the C-phase auxiliary contact and the N-line auxiliary contact, a secondary auxiliary contact is arranged in each travel switch, and the secondary auxiliary contacts are connected in parallel and then connected in series with the main loop switch opening and closing loop.
6. The box-type substation double-loop power supply safety conversion device according to claim 5, characterized in that: an intermediate relay (12) is arranged in the main circuit switch opening and closing circuit, and the secondary auxiliary contacts are connected in parallel and then connected with the contacts of the intermediate relay.
7. The box-type substation double-loop power supply safety conversion device according to claim 4, characterized in that: the isolating copper bar is composed of an A isolating copper bar (13), a B isolating copper bar (14), a C isolating copper bar (15) and an N isolating copper bar (16), wherein the A isolating copper bar is connected with one end of the B isolating copper bar and the C isolating copper bar and the other end of the B isolating copper bar and the C isolating copper bar is connected with a main line copper bar of an outgoing line load, and the N isolating copper bar is connected with a neutral point of a transformer.
8. The box-type substation double-loop power supply safety conversion device according to claim 7, characterized in that: the single isolating copper bar is in an L-shaped structure.
9. The box-to-substation dual-loop power supply safety conversion device according to claim 7, characterized in that: an insulating cover plate (17) is arranged outside the auxiliary contact of the emergency power socket; the single isolated copper bar is a Z-shaped structure, one end of the A isolated copper bar, one end of the B isolated copper bar, one end of the C isolated copper bar and one end of the N isolated copper bar are respectively suspended to cover the A-phase auxiliary contact, the B-phase auxiliary contact, the outer surfaces of the C-phase auxiliary contact and the N-phase auxiliary contact of the emergency power socket, the A isolated copper bar, the other end of the B isolated copper bar and the other end of the C isolated copper bar are respectively connected with the main loop copper bar and the outgoing line load main bus copper bar, and the other end of the N isolated copper bar is connected with a neutral point of a transformer.
10. The box-type substation double-circuit power supply safety conversion device according to any one of claims 1 to 9, characterized in that: the main loop switch opening and closing loop is a high-voltage transformer outgoing line switch opening and closing loop or a low-voltage incoming line switch opening and closing loop; the emergency power socket auxiliary contact cabinet body is arranged on the side wall or the top of the main loop cabinet body; the safety clearance d is 20 to 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222972122.XU CN218678539U (en) | 2022-11-04 | 2022-11-04 | Box-type transformer double-loop power supply safety conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222972122.XU CN218678539U (en) | 2022-11-04 | 2022-11-04 | Box-type transformer double-loop power supply safety conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218678539U true CN218678539U (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222972122.XU Active CN218678539U (en) | 2022-11-04 | 2022-11-04 | Box-type transformer double-loop power supply safety conversion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218678539U (en) |
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2022
- 2022-11-04 CN CN202222972122.XU patent/CN218678539U/en active Active
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