CN213989572U

CN213989572U - Quick access type PT ring main unit with protection

Info

Publication number: CN213989572U
Application number: CN202021998808.0U
Authority: CN
Inventors: 王颂锋
Original assignee: Wuhan Lead Electric Power Technology Co ltd; Xiamen Huadian Switchgear Co Ltd
Current assignee: Wuhan Lead Electric Power Technology Co ltd; Xiamen Huadian Switchgear Co Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-08-17
Anticipated expiration: 2030-09-14

Abstract

The utility model relates to a quick access type PT ring main unit with protection, which comprises a cabinet body with an expansion connecting sleeve, an operating mechanism bin, a quick connecting bin, a PT bin, a switch bin, a pressure relief bin and an operating panel; the quick connection bin consists of a bypass quick plug-pull connector, a protection outer panel and a protection inner panel; the PT bin consists of a voltage transformer, a first European connector and a second European connector; the first European connector is electrically connected with the second European connector through a fully insulated connecting wire; the second European-style connector is connected with the voltage transformer; the switch cabin consists of a busbar, a PT switch, a bypass branch circuit breaker, a bypass isolating switch, a PT loop branch bus and a bypass branch bus; PT switch passes through PT return circuit branch generating line and first european style connector electrical connection, bypass branch circuit breaker and bypass isolator electrical connection, and bypass isolator passes through bypass branch generating line and bypass quick plug connector electrical connection.

Description

Quick access type PT ring main unit with protection

Technical Field

The utility model belongs to the technical field of the PT looped netowrk cabinet, concretely relates to quick access formula PT looped netowrk cabinet of area protection.

Background

With the improvement of urbanization level and the development of economy, national economy and resident life put forward higher and higher requirements on power supply service, so how to keep power off or reduce power failure time in the process of maintaining and overhauling operation and equipment of a transformer substation becomes one of the key points of current work. The distribution network maintenance operation should obey the principle that the energy band is not stopped, and in order to further promote the distribution network operation technical level that does not stop, improve the security and the work efficiency of distribution network operation that do not stop, it becomes urgent to develop the research of novel bypass operation equipment technique.

In a traditional ring main unit or a switching station, a standby interval is generally reserved, and when a certain line breaks down and needs to be overhauled, the standby interval is used for supplying power to a load under the line. However, as the urban power load is rapidly increased, the power consumption is more and more tense, and the standby interval has the problems of space occupation and economy. In addition, in many cases, there is not spare interval in looped netowrk cabinet and the switching station, is unfavorable for live working's expansion, must have a power failure during the maintenance, has reduced user's power consumption quality.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who exists among the prior art, provide a quick access formula PT looped netowrk cabinet of area protection, solved and do not have reserve interval and looped netowrk cabinet or the switching land used nervous difficult problem.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a quick access type PT ring main unit with protection comprises a main body with an expansion connecting sleeve, an operating mechanism bin, a PT bin, a switch bin, a pressure relief bin for controlling air pressure of the switch bin and an operating panel, wherein the quick access type PT ring main unit further comprises a quick access bin; the quick connection bin consists of a bypass quick plug-pull connector, a protection outer panel and a protection inner panel;

the PT bin consists of a voltage transformer, a first European connector and a second European connector; the first European-type connector is electrically connected with the second European-type connector through a fully-insulated connecting wire; the second European-style connector is connected with a voltage transformer;

the switch cabin consists of a busbar, a PT switch, a bypass branch circuit breaker, a bypass isolating switch, a PT loop branch bus and a bypass branch bus; the extension connecting sleeve is electrically connected with the PT switch and the bypass branch circuit breaker respectively through a busbar; PT switch passes through PT return circuit branch generating line and first european style connector electrical connection, bypass branch circuit breaker and bypass isolator electrical connection, bypass isolator passes through bypass branch generating line and bypass quick plug connector electrical connection.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the PT switch is provided with a PT switch operating mechanism; the bypass branch circuit breaker is provided with a bypass branch circuit breaker operating mechanism, and the bypass isolating switch is provided with a bypass branch isolating switch operating mechanism.

Further, the protective inner panel is provided with a bypass cable pass-through hole and an interlock protection device.

Furthermore, the extension connecting sleeve is an extension connecting sleeve for ejecting out of the cabinet or laterally out of the cabinet or backwards out of the cabinet.

Further, the bypass quick plug connector is arranged on the front side of the cabinet body.

Further, quick access formula PT looped netowrk cabinet still includes that a plurality of is used for the bearing rings of hoist and mount transport cabinet body.

Further, the pressure relief bin comprises a pressure relief valve for controlling the air pressure of the switch bin.

Furthermore, the operation panel is composed of a bypass branch line schematic diagram, a bypass branch line breaker operation panel, a bypass branch line disconnecting switch operation panel, a PT loop schematic diagram and a PT switch operation panel.

The utility model has the advantages that: the utility model has the advantages that the number of the ring main units is not increased, the space of the ring main units or the switching station is not enlarged, the original function of the PT cabinet is kept, and the standby interval function is provided; the branch circuit is controlled by a breaker and a disconnecting switch, can cut off fault current and has a protection function; the quick access type PT ring main unit can be quickly butted with a bypass quick access type cable to take electricity and conduct current through a bypass quick plug-in connector, so that a temporary power supply and a bypass power supply are protected to realize a quick access function; the cabinet door of the rapid connecting bin has an interlocking function with the switch operating mechanism, meets the requirement of five prevention, and is more convenient and safer to operate.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the operation panel of the present invention;

fig. 3 is a schematic structural view of the operating mechanism chamber of the present invention;

fig. 4 is the structure schematic diagram of the quick connection bin of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a cabinet body, 2, an operating mechanism cabin, 21, a bypass branch circuit breaker operating mechanism, 22, a bypass branch isolating switch operating mechanism, 23, a PT switch operating mechanism, 3, a quick connection cabin, 31, a bypass quick plug connector, 32, a protection outer panel, 33, a protection inner panel, 34, a bypass cable through hole, 35, an interlocking protection device, 4, a PT cabin, 41, a voltage transformer, 42, a first European connector, 43, a fully insulated connecting wire, 44, a second European connector, 5, a bearing hanging ring, 6, an extension connecting sleeve, 7, a switch cabin, 71, a bus bar, 72, a PT switch, 73, a bypass branch circuit breaker, 74, a bypass isolating switch, 75, a PT loop branch bus bar, 76, a bypass branch bus bar, 8, a pressure relief cabin, 81, a pressure relief valve, 9, an operating panel, 91, a bypass branch schematic diagram, 92, a bypass branch circuit breaker operating panel, 93. a bypass branch line isolation switch operation panel, 94, PT loop schematic diagram, 95, PT switch operation panel.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are intended to be construed broadly, as if they were connected either fixedly or removably, or as integrally formed structures. To those of ordinary skill in the art, the specific meaning of such terms in this patent may be understood as appropriate.

As shown in fig. 1-4, the utility model relates to a quick access formula PT looped netowrk cabinet of area protection, including the cabinet body 1 of taking extension adapter sleeve 6, operating device storehouse 2, the storehouse of plugging into 3, PT storehouse 4, switch storehouse 7 fast, be used for controlling the pressure release storehouse 8 of the atmospheric pressure in switch storehouse 7 to and operating panel 9.

As shown in fig. 1 and 3, the operating mechanism magazine 2 is composed of a bypass-branch breaker operating mechanism 21, a bypass-branch disconnector operating mechanism 22, and a PT switch operating mechanism 23.

As shown in fig. 1 and 4, the quick-connect bay 3 is comprised of a bypass quick-connect coupling 31, a protective outer panel 32 and a protective inner panel 33. The bypass quick plugging and unplugging joint 31 is stably connected through a spring bolete clamping structure; the contact fingers are used as conductive media, and the sealed mechanical structure ensures the safety performance of power transmission. The protective inner panel 33 is provided with a bypass cable passing hole 34 and an interlock protection device 35. When the protection inner panel 33 is opened, the bypass breaker operating mechanism 21 and the bypass disconnecting switch operating mechanism 22 are locked, and the closing operation is disabled. When the bypass branch breaker 73 or the bypass isolation switch 74 is closed, the protection inner panel 33 is locked and cannot be opened.

As shown in fig. 1, the PT bin 4 is composed of a voltage transformer 41, a first european connector 42 and a second european connector 44; the first European connector 42 is electrically connected with the second European connector 44 through a fully insulated connecting wire 43; the second european connector 44 is connected with the voltage transformer 41, and can supply power to the whole ring main unit system through the voltage transformer 41, and simultaneously perform voltage measurement monitoring.

As shown in fig. 1, the switch cabin 7 is composed of a busbar 71, a PT switch 72, a bypass branch breaker 73, a bypass isolating switch 74, a PT loop branch busbar 75 and a bypass branch busbar 76; the PT switch 72 is provided with a PT switch operating mechanism 23; the bypass branch breaker 73 controls switching on and off by the bypass branch breaker operating mechanism 21, and the bypass isolation switch 74 performs switching on and off by the bypass branch isolation switch operating mechanism 22.

As shown in fig. 1, the extension connection sleeve 6 is electrically connected with a PT switch 72 and a bypass branch breaker 73 through a busbar 71; the PT switch 72 is electrically connected to the first european connector 42 through a PT loop branch busbar 75, the bypass branch breaker 73 is electrically connected to the bypass isolation switch 74, and the bypass isolation switch 74 is electrically connected to the bypass quick plug connector 31 through a bypass branch busbar 76. Through bypass quick plug connector 31, make quick access formula PT looped netowrk cabinet can get the electricity with the quick butt joint of bypass quick access type cable, drainage, realize the quick access function of interim power, bypass power supply area protection.

The inventor adds a branch control loop on the basis of not changing the original PT cabinet function: the bypass branch breaker 73, the bypass isolating switch 74, the bypass quick plug connector 31 and other accessories. The design of the inventor solves the problems of no standby interval and shortage of the area for the ring main unit or the switching station, the branch loop is controlled by the circuit breaker and the isolating switch, the fault current can be cut off, and the protection function is realized; meanwhile, the bypass quick plugging connector 31 is adopted, so that the bypass operation is conveniently unfolded, and the bypass operation time is shortened. The double-layer cover plate is arranged to protect the bypass quick plug connector 31, and the quick connection cabin 3 is provided with a device which is interlocked with the switch operating mechanism, so that the five-prevention requirement is met.

The extension joint sleeve 6 can be a top-out cabinet or a side-out cabinet or a back-out cabinet extension joint sleeve, and is not limited to a single fixing form. The quick access type PT ring main unit is connected with other ring main units in a combined mode or connected with a bus through the extension connecting sleeve 6.

As shown in fig. 1, the bypass quick-connect/disconnect connector 31 is disposed at the front side of the cabinet 1. It should be noted that the bypass quick-connect/disconnect connector 31 is not limited to be disposed at the front side of the cabinet 1, and may be disposed at an appropriate position such as the rear side of the cabinet 1.

As shown in fig. 1, the quick access type PT ring main unit further includes a plurality of load-bearing lifting rings 5 for lifting the carrying cabinet body 1.

As shown in fig. 1, the decompression chamber 8 includes a decompression valve 81 for controlling the air pressure of the switch chamber 7.

As shown in fig. 2, the operation panel 9 is composed of a bypass branch schematic 91, a bypass branch breaker operation panel 92, a bypass branch disconnector operation panel 93, a PT loop schematic 94, and a PT switch operation panel 95.

The mechanisms, assemblies and components of the present invention that are not described with respect to specific structures are conventional structures that exist in the prior art. Can be purchased directly from the market.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A fast access type PT ring main unit with protection comprises a main body (1) with an expansion connecting sleeve (6), an operating mechanism bin (2), a PT bin (4), a switch bin (7), a pressure relief bin (8) for controlling the air pressure of the switch bin (7), and an operating panel (9), and is characterized in that the fast access type PT ring main unit further comprises a fast access bin (3); the rapid connection bin (3) consists of a bypass rapid plug-in connector (31), a protective outer panel (32) and a protective inner panel (33);

the PT bin (4) consists of a voltage transformer (41), a first European connector (42) and a second European connector (44); the first European connector (42) is electrically connected with the second European connector (44) through a fully insulated connecting wire (43); the second European-style connector (44) is connected with the voltage transformer (41);

the switch bin (7) consists of a busbar (71), a PT switch (72), a bypass branch circuit breaker (73), a bypass isolating switch (74), a PT loop branch bus (75) and a bypass branch bus (76); the extension connecting sleeve (6) is respectively and electrically connected with the PT switch (72) and the bypass branch line breaker (73) through a busbar (71); the PT switch (72) is electrically connected with the first European connector (42) through a PT loop branch bus (75), the bypass branch circuit breaker (73) is electrically connected with the bypass isolating switch (74), and the bypass isolating switch (74) is electrically connected with the bypass quick plug connector (31) through a bypass branch bus (76).

2. The fast access PT ring main unit as claimed in claim 1, wherein the PT switch (72) is provided with a PT switch operating mechanism (23); the bypass branch circuit breaker (73) is provided with a bypass branch circuit breaker operating mechanism (21), and the bypass isolating switch (74) is provided with a bypass branch isolating switch operating mechanism (22).

3. The fast access PT ring main unit as claimed in claim 2, wherein the protection inner panel (33) is provided with a bypass cable pass-through hole (34) and an interlock protection device (35).

4. The fast access PT ring main unit according to claim 1, wherein the extension connecting sleeve (6) is an ejection cabinet or a side-out cabinet or a rear-out cabinet extension connecting sleeve.

5. The quick access type PT ring main unit according to claim 1, characterized in that the bypass quick plug connector (31) is arranged at the front side of the main unit body (1).

6. The quick access type PT ring main unit according to claim 1, further comprising a plurality of bearing rings (5) for hoisting the carrying main unit body (1).

7. The fast access PT ring main unit according to claim 1, wherein the pressure relief cabin (8) comprises a pressure relief valve (81) for controlling the air pressure of the switch cabin (7).

8. The fast access type PT ring main unit according to claim 1, wherein the operation panel (9) is composed of a bypass branch line schematic diagram (91), a bypass branch line breaker operation panel (92), a bypass branch line disconnecting switch operation panel (93), a PT loop schematic diagram (94) and a PT switch operation panel (95).