CN116742518A - Gas-insulated bus PT combined cabinet - Google Patents
Gas-insulated bus PT combined cabinet Download PDFInfo
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- CN116742518A CN116742518A CN202310562340.2A CN202310562340A CN116742518A CN 116742518 A CN116742518 A CN 116742518A CN 202310562340 A CN202310562340 A CN 202310562340A CN 116742518 A CN116742518 A CN 116742518A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0356—Mounting of monitoring devices, e.g. current transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a gas-insulated bus PT combined cabinet, which comprises a front cabinet provided with a control mechanism, an air box, a rear cabinet provided with plug-in voltage mutual inductance and/or plug-in lightning arrester and a cable chamber provided with an outgoing cable, wherein the inner space of the air box is divided into a bus chamber and a circuit breaker chamber by a diaphragm, and a three-phase conductive flange, a three-station switch, a bus inner cone and an auxiliary device which are sequentially connected are arranged in the bus chamber; the circuit breaker is characterized in that a main circuit connection copper bar, a vacuum circuit breaker, a current transformer, a cable inner cone and an electricity inspection cone which are sequentially connected are arranged in the circuit breaker chamber, an outgoing cable is connected with the cable inner cone, and the main circuit connection copper bar is connected with a three-phase conductive flange. The invention can combine the lightning arrester, the voltage transformer, any incoming line cabinet, outgoing line cabinet and bus-bar cabinet into a bus PT incoming line cabinet, a bus PT outgoing line cabinet, a bus PT bus-bar cabinet and the like, and has small product size and small occupied area.
Description
Technical Field
The invention relates to a gas insulated bus PT combined cabinet.
Background
The voltage transformer and the lightning arrester are important in the electric main system because the voltage transformer is required to be used as measurement voltage, instrument and meter voltage, protection voltage and the like in the electric main system and the lightning arrester is arranged to carry out overvoltage and lightning protection. In a normal case, a switchgear in which a main component in a switchgear is a voltage transformer (including a lightning arrester) is called a PT cabinet, however, due to different characteristics of a power grid and different installation and use conditions, the voltage transformer and the lightning arrester may be installed in the switchgear together with other main components, so as to be distinguished from a conventional incoming line cabinet, an outgoing line cabinet and a bus-bar cabinet, which are generally called bus PT combined cabinets (including a bus PT incoming line cabinet, a bus PT outgoing line cabinet and a bus PT bus-bar combined cabinet).
As shown in fig. 1, the scheme is one-time scheme of 35kV switchgear of the existing subway power supply system. The primary scheme can be seen that the main components of the primary part of the 35kV switching equipment of the subway power supply system comprise a three-station switch (GS), a breaker (VCB), a Current Transformer (CT), a voltage transformer (PT), a Lightning Arrester (LA) and the like, and the primary scheme can be used for configuring the voltage transformers (PT) and the Lightning Arresters (LA) in different types and numbers according to specific design parameters of engineering; the function of connecting the voltage transformer on the bus is: providing a measurement voltage, an instrument voltage and a protection voltage in the electrical system; providing a measurement voltage for the power meter; providing operating and control power to the associated devices; meets the relay protection requirement of an electrical system. The effect of connecting the lightning arrester on the bus is: overvoltage protection and lightning protection.
At present, most of subway 35kV power supply systems use gas-insulated metal-enclosed switchgear, so that the design of a bus PT combined cabinet relates to gas operation, gas tank sealing, underground construction requirements and the like, the reasonable design of the bus PT combined cabinet is particularly important, if the structural design is unreasonable, the bus PT combined cabinet is poor in insulation effect, inconvenient to install and maintain, large in product external dimension, large in occupied area, difficult to operate with other switchgear forming systems, poor in engineering adaptability, and safe in construction and the like.
Disclosure of Invention
The invention aims to provide the gas insulated bus PT combined cabinet which is simple in structure, small in occupied space, good in insulation effect, flexible to install, convenient to maintain and high in adaptability.
The aim of the invention is achieved by the following technical scheme: the gas-insulated bus PT combined cabinet comprises a cabinet body and is characterized by comprising a front cabinet provided with a control mechanism, a gas box, a rear cabinet provided with plug-in voltage transformers and/or plug-in lightning arresters and a cable chamber provided with outgoing cables, wherein the gas box is positioned above the cable chamber and between the front cabinet and the rear cabinet, the internal space of the gas box is divided into an upper bus chamber and a lower circuit breaker chamber by a diaphragm, and the bus chamber is internally provided with a three-phase conductive flange, a three-station switch, a bus inner cone and an auxiliary device which are sequentially connected, and a copper bar, a voltage transformer plug-in inner cone for installing the plug-in voltage transformers and/or a lightning arrester plug-in inner cone for installing the plug-in lightning arresters, wherein the three-station switch is installed on the diaphragm, and the voltage transformer plug-in inner cone and/or the lightning arrester plug-in inner cone are arranged on the inner wall of the bus chamber; the circuit breaker is characterized in that a main circuit connection copper bar, a vacuum circuit breaker, a current transformer, a cable inner cone and an electricity testing cone which are sequentially connected are arranged in the circuit breaker chamber, an outgoing cable is connected with the cable inner cone, and the main circuit connection copper bar is connected with a three-phase conductive flange.
The invention can combine the lightning arrester, the voltage transformer, any incoming line cabinet, outgoing line cabinet and bus-connected cabinet into a bus PT incoming line cabinet, a bus PT outgoing line cabinet, a bus PT bus-connected cabinet and the like, has small overall dimension and small occupied area, is especially suitable for subway installation and operation with smaller places, meets the test requirement of the standard GB3906-2020 and the use requirement of users, can reduce the consumption of copper bars, and has the advantages of reasonable structural design, good insulation effect, convenient installation and maintenance and component replacement, unified overall dimension with other switch equipment, no influence on mutual cabinet combination and system operation among the switch equipment, and strong engineering adaptability.
Under the condition that the appearance and the scheme allow, the plug-in type thunder device and the plug-in type voltage transformer can be plugged into one gas insulated bus PT combined cabinet at the same time, and can also be plugged into different gas insulated bus PT combined cabinets according to the convenience of maintenance or the requirement of a user.
The back of the gas tank is provided with the groove, so that the outline of the outer edge of the side face of the gas tank is concave, the plug-in type lightning arrester is positioned in the groove, and the plug-in type voltage transformer is positioned on the top face of the gas tank.
The bus inner cones are uniformly arranged on two opposite side walls of the gas tank, the main circuit connecting copper bars are of parallel bending structures, and a transverse lap joint mode is adopted, one end of each main circuit connecting copper bar is lapped on the lower end of the bus inner cone connecting copper bar, and the other end of each main circuit connecting copper bar is lapped on the upper end of the bus inner cone connecting copper bar.
According to the invention, the top surface of the bus chamber is provided with component mounting holes, the upper part of the back surface is provided with pressure release device mounting holes, the front surface and the back surface of the breaker chamber are provided with component mounting holes, the back surface is provided with pressure release device mounting holes, and each pressure release device mounting hole is provided with a movable cover plate, so that the bus chamber, the breaker chamber and the cable chamber are provided with independent pressure release channels, the upper end of the back surface of the rear cabinet is provided with the pressure release channels, and the back surface of the rear cabinet is outwards protruded corresponding to the outlet part of the pressure release channel so as to increase the pressure release channels. In the invention, the bus chamber, the breaker chamber and the cable chamber are all provided with independent pressure release channels, in order to release pressure from the cabinet top quickly, the upper end of the back plate of the rear cabinet is provided with a raised pressure release channel, if an internal fault arc is generated, the top cover plate is opened quickly under the action of gas pressure, high-pressure gas is discharged from the cabinet top quickly, people and components in the cabinet are not damaged, and the raised pressure release channel does not influence the cabinet combining, mounting and operation of the switch cabinet.
In a wider switch cabinet (for example, the cabinet width is 800 mm), A, B, C phases of auxiliary device connection copper bars are all in a bending straight line connection mode, namely, the plug-in type thunder device and the plug-in type voltage transformer share one auxiliary device connection copper bar which is respectively connected to A, B, C phases of main circuit connection copper bars; in a narrower switch cabinet (for example, the cabinet width is 600 mm), A, C phases of auxiliary device connection copper bars are in a bending oblique line connection mode, namely, the auxiliary device connection copper bars are obliquely extended to be connected with a main circuit connection copper bar and a plug-in type thunder device, and bus bars of the plug-in type voltage transformer are connected with the auxiliary device connection copper bars. As long as the vibration impact of transportation and operation does not affect the electric gap between the auxiliary device and the primary component, the external dimension and the sectional area of the auxiliary device connected with the copper bar can be very small, the requirements of GB3906-2020 can be met, the structural design is reasonable, and the consumption of the copper bar can be reduced.
The front cabinet comprises a front cabinet body and a front door arranged on the front surface of the front cabinet body, wherein the front door consists of an upper door and a lower door, the upper door is used for installing a protection device and secondary components thereof and marking a primary wiring scheme of the gas-insulated bus PT combined cabinet, and the lower door is used for installing the protection device and an electrified display device. The design of the upper door and the lower door of the front cabinet ensures that the components of the upper door and the lower door are reasonably distributed, the door hinge is uniformly stressed, the transportation and the operation are reliable, and the comprehensive cost is lower.
The component mounting holes at the top of the bus chamber and the component mounting holes at the rear part of the breaker chamber have the same opening size, the gas tank is sealed by using a cover plate with the same size, the pressure release device mounting holes at the rear part of the bus chamber and the pressure release device mounting holes at the rear part of the breaker chamber have the same opening size, and the gas tank is sealed by using the pressure release device with the same size.
The widths of the bus chamber and the breaker chamber are the same, and a designer can flexibly select the width of the switch cabinet according to design requirements, so that the use requirements are met, and the occupied area is saved.
Compared with the prior art, the invention has the following remarkable effects:
the invention can combine a lightning arrester, a voltage transformer, any incoming line cabinet, any outgoing line cabinet and any bus connection cabinet into a bus PT incoming line cabinet, a bus PT outgoing line cabinet, a bus PT bus connection cabinet and the like, and combines two switch cabinets into one switch cabinet.
The invention adopts the modularized design, and the front cabinet, the air box, the rear cabinet and the cable chamber are respectively connected with each other and are mutually independent, so that the combined installation is convenient, and the design and assembly efficiency is high.
The invention meets the test requirements of the main circuit of GB3906-2020, 7.6.1, the standards regarding that the wiring to auxiliary devices (e.g. voltage transformers, lightning arresters, auxiliary transformers, pulse capacitors, voltage detection devices and the like) is not part of the main circuit, namely: the copper bar connected to the auxiliary device does not need to be tested for short-circuit current and peak withstand current, the external dimension and the sectional area of the copper bar connected to the auxiliary device can be small, the structural design is reasonable, the use requirement can be met, and the use amount of the copper bar can be reduced.
The invention has reasonable structural design, good insulation effect, convenient installation and maintenance and component replacement, unified external dimension with other switch equipment, no influence on mutual cabinet combination among the switch equipment, system operation, strong engineering adaptability and high serialization degree.
Drawings
The invention will now be described in further detail with reference to the drawings and to specific examples.
FIG. 1 is a schematic diagram of a primary scheme of 35kV switchgear of a conventional subway power supply system;
FIG. 2 is a side view of the present invention;
FIG. 3 is an exploded view of the present invention;
FIG. 4 is one of the schematic structural views of the air box of the present invention;
FIG. 5 is a second schematic view of the structure of the air box of the present invention;
FIG. 6 is a schematic diagram of the bus inner cone arrangement and the main circuit connection copper bar lap joint on both sides of the bus chamber of the gas tank with the width of 600 mm;
FIG. 7 is a schematic diagram of the lapping of copper bars connected to an auxiliary loop of a 600mm wide gas tank of the invention;
FIG. 8 is a schematic diagram of the bus inner cone arrangement and the main circuit connection copper bar lap joint on both sides of the bus chamber of the gas tank with the width of 800 mm;
FIG. 9 is a schematic diagram of the lapping of copper bars connected to an auxiliary loop of an air box 800mm in width;
FIG. 10 is a schematic view of the layout of the front door panel of the cabinet of the present invention with a cabinet width of 600 mm;
FIG. 11 is a schematic view of the layout of the front door panel of the front cabinet of 800mm in width;
fig. 12 is a schematic view of the pressure relief channel of the rear cabinet of the present invention.
The device comprises a 1-vacuum circuit breaker, a 2-main circuit connection copper bar, a 3-three-phase conductive flange, a 4-three-position switch, a 5-bus inner cone, a 6-auxiliary device connection copper bar, a 7-voltage transformer plug-in inner cone (2 # cone), an 8-plug-in voltage transformer, a 9-arrester plug-in inner cone, a 10-plug-in arrester, a 11-current transformer, a 12-electricity testing cone (2 # cone), a 13-cable inner cone (2 # cone/3 # cone) and a 14-outgoing cable; a-front cabinet, A1-primary wiring scheme, A2-upper door, A3-lower door, B-gas tank, C-rear cabinet, C1-raised pressure release channel, C2-top cover plate and D-cable chamber; b1-busbar chamber, B2-breaker chamber, B3-diaphragm; b4-pressure release device, B5-cover plate.
Detailed Description
As shown in fig. 1 to 12, the gas-insulated bus PT combined cabinet of the present invention includes a cabinet body, the cabinet body adopts a modular design, and includes a front cabinet a provided with an operating mechanism, a gas box B, a rear cabinet C provided with a plug-in type lightning arrester 10, a cable chamber D provided with an outgoing cable 14, and a plug-in type voltage transformer 8 provided on the top surface of the gas box B, the gas box B is located above the cable chamber D and between the front cabinet a and the rear cabinet C, and the front cabinet a, the gas box B, the rear cabinet C and the cable chamber D are connected by bolts welded on the gas box and the openings of the front cabinet a, the rear cabinet C and the cable chamber D are respectively connected by corresponding bolts, so as to form the bus PT combined cabinet, see fig. 3. The internal insulation medium of the gas tank B can be C4F7N/C02 mixed gas, SF6 gas or other environment-friendly gas, the internal space of the gas tank B is divided into an upper bus chamber B1 and a lower breaker chamber B2 by a diaphragm B3, a three-phase conductive flange 3, a three-station switch 4, a bus inner cone 5, an auxiliary device connecting copper bar 6, a voltage transformer plug inner cone 7 and a lightning arrester plug inner cone 9 which are sequentially connected are arranged in the bus chamber B1, wherein the three-station switch 4 is arranged on the diaphragm B3 to separate the bus chamber and the breaker chamber, the voltage transformer plug inner cone 7 and the lightning arrester plug inner cone 9 are respectively arranged on the inner wall of the bus chamber B1, the voltage transformer plug inner cone 7 is particularly positioned on the top surface of the bus chamber B1, the voltage transformer plug inner cone 7 is connected with the plug-in voltage transformer 8, and the lightning arrester plug inner cone 9 is connected with the plug-in type lightning arrester 10; the main circuit connection copper bar 2, the vacuum circuit breaker 1, the current transformer 11, the cable inner cone 13 and the electricity testing cone 12 which are sequentially connected are arranged in the circuit breaker chamber B2, the outgoing cable 14 is connected with the cable inner cone 13, and the main circuit connection copper bar 2 is connected with the three-phase conductive flange 3.
The main circuit is connected with a copper bar 2, a three-phase conductive flange 3, a three-station switch 4, a bus inner cone (special) 5, an auxiliary device connected with a copper bar 6, a voltage transformer plug-in inner cone (2 # cone) 7, a plug-in voltage transformer 8, a lightning arrester plug-in inner cone (2 # cone) 9, a plug-in thunder device 10, a current transformer 11, an electricity checking cone (2 # cone) 12, a cable inner cone (2 # cone/3 # cone) 13 and an outgoing cable 14 to form main primary components of the gas insulated bus PT combined cabinet, which is shown in fig. 2.
Referring to fig. 4, the back of the gas tank B is provided with a groove, so that the outline of the outer edge of the side surface of the gas tank is concave, that is, the gas tank is designed to be a concave side structure, the plug-in type lightning arrester 10 is located in the groove, and the plug-in type voltage transformer 8 is located on the top surface of the gas tank B. The air box B is formed by welding stainless steel plates with the thickness of 3.0mm by laser and is a double air chamber with a baffle plate. The top of the bus chamber B1 is provided with a component mounting hole, and the rear part of the bus chamber B1 is provided with a pressure release device mounting hole; the front and rear parts of the breaker chamber B2 are provided with component mounting holes, and are provided with pressure release device mounting holes. After the components are installed, the cover plate B5 is used for sealing the component installation holes of the air chambers, and the pressure release device B4 seals the pressure release device installation holes of the air chambers, so that the sealed air box B of the bus PT combined cabinet is formed. Wherein, the opening sizes of the component mounting holes at the top of the bus bar chamber B1 and the component mounting holes at the rear part of the breaker chamber B2 are the same, the air box B is sealed by a cover plate B5 with the same size, the opening sizes of the pressure release device mounting holes at the rear part of the bus bar chamber B1 and the pressure release device mounting holes at the rear part of the breaker chamber B2 are the same, the air box B is sealed by a pressure release device B4 with the same size, in addition, the opening sizes of the component mounting holes at the top of the bus bar chamber B1 and the component mounting holes at the rear part of the breaker chamber B2 of the air box with different widths are the same, and the opening sizes of the pressure release device mounting holes are the same, so that a unified module is formed.
Referring to fig. 5, a bus room B1 is an independent compartment, and internally provided with a three-phase conductive flange 3, a three-position switch 4, a special bus inner cone 5, a main circuit connection copper bar 2, an auxiliary device connection copper bar 6, a voltage transformer plug inner cone (2 # cone) 7 and a lightning arrester plug inner cone (2 # cone) 9; and has a plug-in voltage transformer 8 and a plug-in lightning arrester 10 assembled from the outside; the connecting inner cones of the plug-in type thunder device 10 and the plug-in type voltage transformer 8 adopt standardized parts (No. 2 cones), the part of the plug-in type lightning arrester 10 exposed out of the gas box is positioned in a rear cabinet C of the switch equipment, and the part of the plug-in type voltage transformer 8 exposed out of the gas box is positioned at the top of the switch equipment; under the condition that the appearance and the scheme allow, the plug-in type lightning arrester 10 and the plug-in type voltage transformer 8 can be plugged into one switch cabinet at the same time, and can also be plugged into different switch cabinets (such as an incoming line cabinet, an outgoing line cabinet and a bus-bar cabinet) according to the convenience of maintenance or the requirements of users; because of the small size, the plug-in type lightning arrester 10 can be used with a narrower switch cabinet (for example, the cabinet width is 600 mm). The plug-in voltage transformer 8 has large volume and large external dimension, and can select a wider switch cabinet (for example, the cabinet width is 800 mm). During product transportation, the plug-in voltage transformer 8 and the plug-in thunder device 10 are transported independently, the plug-in voltage transformer 8, the plug-in thunder device 10 and the connecting cable 14 are installed on a product operation site, and the product can be put into use after on-site acceptance.
Referring to fig. 6, the breaker chamber B2 includes: the vacuum circuit breaker 1, the main circuit is connected with the copper bar 2, the current transformer 11, the electricity testing cone (2 # cone) 12, the cable inner cone (2 # cone/3 # cone) 13 and the outgoing cable 14, a narrower switch cabinet (such as a cabinet with the width of 600 mm) or a wider switch cabinet (such as a cabinet with the width of 800 mm) can be selected according to the requirements and the design requirements of the plug-in type lightning arrester 10 and the plug-in type voltage transformer 8, the widths of the bus-bar chamber B1 and the circuit breaker chamber B2 are the same, and a designer can flexibly select the width of the switch cabinet according to the design requirements, so that the use requirements are met, and the effect of saving the occupied area is achieved.
As shown in fig. 6 to 9, bus inner cones 5 on two sides of a bus chamber B1 of the combined cabinet are uniformly arranged on two side surfaces of a switch device, the bus inner cones 5 on the upper portion of the bus chamber B1 are special inner cones, a main circuit connecting copper bar 2 is transversely overlapped, the main circuit connecting copper bar 2 is designed into a parallel bending structure for balancing an electric gap and avoiding overlarge stress of the bus inner cones 5 when a three-station switch 4 is closed, the left end is overlapped and connected with the lower end of the left inner cone copper bar 5, the right end is overlapped and connected with the upper end of the inner cone copper bar 5, the three-station switch 4 positioned in the bus chamber B1 is of a rotary structure and is longitudinally assembled in the bus chamber, and the combined cabinet has the functions of closing, isolating and grounding. The cabinet width of the combined cabinet has two forms, the A, B, C phase of the copper bar 6 connected by the auxiliary device of the wider switch cabinet (such as the cabinet width of 800 mm) is in a bending straight line connection mode, and the copper bar 6 connected by the auxiliary device shared by the plug-in lightning arrester 10 and the plug-in voltage transformer 8 is respectively connected to the A, B, C phase of the copper bar 2 connected by the main circuit. In narrower cubical switchboard (for example the cabinet width is 600 mm), A, C looks auxiliary device connects copper bar 6 for bending oblique line connected mode, namely: the auxiliary device connection copper bar 6 is firstly connected with the main circuit connection copper bar 2 and the plug-in type lightning arrester 10 in a diagonal way, and the bus of the plug-in type voltage transformer 8 is connected with the auxiliary device connection copper bar 6; as long as the vibration impact of transportation and operation does not affect the electric gap between the auxiliary device and the copper bar 6 and the primary component, the external dimension and the sectional area of the auxiliary device connected with the copper bar 6 can be very small, the requirements of GB3906-2020 can be met, the structural design is reasonable, and the consumption of the copper bar can be reduced.
As shown in fig. 10 and 11, the front cabinet a of the combined cabinet includes a front door and a front cabinet body, and the front door is installed on the front surface of the front cabinet body. The front door comprises an upper door A2 and a lower door A3, the upper door is used for installing a protection device and secondary components thereof, a primary wiring scheme A1 of the combined cabinet is marked, the lower door is used for installing the protection device and an electrified display device, and the design of the upper door and the lower door of the front cabinet A of the switch equipment ensures that the components of the upper door A2 and the lower door A3 of the switch cabinet are reasonably distributed, the door hinge is uniformly stressed, the transportation and the operation are reliable, and the design comprehensive cost is lowest.
As shown in fig. 12, the busbar chamber B1, the breaker chamber B2 and the cable chamber D are all provided with independent pressure release channels, in order to release pressure from the cabinet top quickly, the upper end of the rear panel of the rear cabinet C is provided with a raised pressure release channel C1, if an internal fault arc is generated, the top cover plate C2 is opened quickly under the action of gas pressure to discharge high-pressure gas from the cabinet top quickly, so that people and components in the cabinet are not damaged, and the raised pressure release channel C1 is arranged at the upper end of the rear panel of the rear cabinet C, so that the combination, installation and operation of the switch cabinet are not affected.
Under the general condition, the voltage transformer and the lightning arrester are simultaneously installed in one cabinet, so that the installation is easy, the cost is optimal, and the maintenance is not influenced. There are also cases where only a voltage transformer and no lightning arrester are provided in one cabinet, and at this time, the lightning arrester is not inserted into the inner cone. Of course, the design scheme only has the conditions of a lightning arrester and no voltage transformer, and the voltage transformer is cancelled to be connected with the inner cone. Some users also require that the voltage transformer and the lightning arrester be respectively installed in two cabinets.
Claims (10)
1. The utility model provides a gas-insulated generating line PT sectional bin, includes the cabinet body, its characterized in that: the cabinet body comprises a front cabinet provided with a control mechanism, an air box, a rear cabinet provided with a plug-in voltage transformer and/or a plug-in arrester and a cable chamber provided with an outgoing cable, wherein the air box is positioned above the cable chamber and between the front cabinet and the rear cabinet, the inner space of the air box is divided into an upper bus chamber and a lower circuit breaker chamber by a diaphragm, and the bus chamber is internally provided with a three-phase conductive flange, a three-station switch, a bus inner cone and an auxiliary device which are sequentially connected, a voltage transformer plug-in inner cone for installing the plug-in voltage transformer and/or a arrester plug-in inner cone for installing the plug-in arrester, wherein the three-station switch is arranged on the diaphragm, and the voltage transformer plug-in inner cone and/or the arrester plug-in inner cone are arranged on the inner wall of the bus chamber; the circuit breaker is characterized in that a main circuit connection copper bar, a vacuum circuit breaker, a current transformer, a cable inner cone and an electricity testing cone which are sequentially connected are arranged in the circuit breaker chamber, an outgoing cable is connected with the cable inner cone, and the main circuit connection copper bar is connected with a three-phase conductive flange.
2. The gas insulated bus PT combination cabinet of claim 1, wherein: the plug-in type thunder device and the plug-in type voltage transformer are installed in one gas insulated bus PT combination cabinet or in different gas insulated bus PT combination cabinets.
3. The gas insulated bus PT combination cabinet of claim 2, wherein: the back of the gas tank is provided with a groove, so that the outline of the outer edge of the side face of the gas tank is concave, the plug-in type lightning arrester is positioned in the groove, and the plug-in type voltage transformer is positioned on the top face of the gas tank.
4. A gas insulated busbar PT combination as set forth in claim 3, wherein: the bus inner cones are uniformly arranged on two opposite side walls of the gas tank, the main circuit connection copper bars are of parallel bending structures, a transverse lap joint mode is adopted, one ends of the main circuit connection copper bars are lapped at the lower ends of the bus inner cones connected with the copper bars, and the other ends of the main circuit connection copper bars are lapped at the upper ends of the bus inner cones connected with the copper bars.
5. The gas insulated bus PT switchgear of claim 4, wherein: the bus chamber top surface is opened there is components and parts mounting hole, back upper portion is opened there is pressure release device mounting hole, components and parts mounting hole, back are all opened to the circuit breaker room front and back, install movable apron on each pressure release device mounting hole for bus chamber, circuit breaker room and cable chamber all have independent pressure release passageway the back upper end of back cabinet has set up pressure release passageway, the back of back cabinet is corresponding to the export position outside of its pressure release passageway and is protruding in order to increase pressure release passageway.
6. The gas insulated bus PT switchgear of claim 5, wherein: the plug-in type thunder device and the plug-in type voltage transformer share an auxiliary device connecting copper bar which is respectively connected to A, B, C phases of the main circuit connecting copper bar.
7. The gas insulated bus PT switchgear of claim 5, wherein: the auxiliary device is connected with the copper bar in an inclined extending mode, the main circuit is connected with the copper bar and the plug-in type thunder device, and the bus of the plug-in type voltage transformer is connected with the auxiliary device to be connected with the copper bar.
8. The gas insulated bus PT switchgear of claim 6 or 7, wherein: the front cabinet comprises a front cabinet body and a front door arranged on the front face of the front cabinet body, wherein the front door consists of an upper door and a lower door, the upper door is used for installing a protection device and secondary components thereof and marking a primary wiring scheme of the gas-insulated bus PT combined cabinet, and the lower door is used for installing the protection device and an electrified display device.
9. The gas insulated bus PT combination cabinet of claim 8, wherein: the component mounting hole at the top of the bus chamber is the same as the opening size of the component mounting hole at the rear part of the breaker chamber, the air box is sealed by a cover plate with the same size, the opening size of the pressure release device mounting hole at the rear part of the bus chamber is the same as the opening size of the pressure release device mounting hole at the rear part of the breaker chamber, and the air box is sealed by a pressure release device with the same size.
10. The gas insulated bus PT combination cabinet of claim 9, wherein: the bus bar chamber and the breaker chamber have the same width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310562340.2A CN116742518A (en) | 2023-05-18 | 2023-05-18 | Gas-insulated bus PT combined cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310562340.2A CN116742518A (en) | 2023-05-18 | 2023-05-18 | Gas-insulated bus PT combined cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116742518A true CN116742518A (en) | 2023-09-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119909847A (en) * | 2025-04-02 | 2025-05-02 | 江苏安靠智电股份有限公司 | Structure and manufacturing method of a particle capture device for GIL three-pillar insulator |
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2023
- 2023-05-18 CN CN202310562340.2A patent/CN116742518A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119909847A (en) * | 2025-04-02 | 2025-05-02 | 江苏安靠智电股份有限公司 | Structure and manufacturing method of a particle capture device for GIL three-pillar insulator |
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