CN101345398A

CN101345398A - Central-positioned switch cabinet

Info

Publication number: CN101345398A
Application number: CNA2008100218947A
Authority: CN
Inventors: 赵弘; 李帮林
Original assignee: ANHUI ZHONGANHENGYU ELECTRIC TRANSMISSION Co Ltd
Current assignee: ANHUI ZHONGANHENGYU ELECTRIC TRANSMISSION Co Ltd
Priority date: 2008-08-18
Filing date: 2008-08-18
Publication date: 2009-01-14

Abstract

The invention relates to an intermediate switchgear cabinet comprising a cabinet housing and a diaphragm integrating with the cabinet housing which divides the enclosure space enclosed by the cabinet housing into a busbar room, a handcart room, a relay instrument room and a cable room according to the function. The cabinet housing and the insulation diaphragm of the invention adopt assembly rather than welding, thereby avoiding welding stress. Furthermore the size of the invention is small and the installation and trial run is convenient.

Description

Intermediate switchgear cabinet

Technical field

The present invention relates to a kind of intermediate switchgear cabinet.

Background technology

At present, fixed ac metal closing switch gear cabinet skeleton is welded by angle steel, divides breaker chamber, bus-bar room, cable vault, relay bungalow etc. in the cabinet, separates with steel plate between the chamber.Because this cabinet is Welding Structure, not only the production cycle is long, structural failure is big, welding stress can't be avoided, and cabinet overall dimension is big, and the investment of the switchgear house system of enfeoffment is big, and main components and parts are installed, safeguarded in the cabinet, maintenance is very inconvenient.In addition, the degree of protection of this cabinet type is IP2X only, and degree of protection is low; Five-defence block poor reliability, operating difficulties; Antiseptic property is poor.

Summary of the invention

The object of the present invention is to provide the intermediate switchgear cabinet that a kind of volume is little, can avoid welding stress.

For achieving the above object, a kind of intermediate switchgear cabinet provided by the invention comprises the cabinet shell, and dividing plate is divided into bus-bar room, handcart chamber, relay control room and cable vault with the enclosure space that the cabinet shell surrounds by function, and dividing plate and cabinet shell are assembled into one.

Cabinet shell among the present invention and insulating barrier adopt assembling but not welding stress has been avoided in welding, and in addition, volume of the present invention is little, Installation and Debugging convenient.

Description of drawings

Fig. 1 is circuit theory diagrams of the present invention;

Fig. 2 is an electrical schematic diagram of the present invention.

Embodiment

A kind of intermediate switchgear cabinet; comprise cabinet shell 50; the enclosure space that dividing plate 70 surrounds cabinet shell 50 is divided into four chambers; wherein; the upper left side of cabinet shell 50 is provided with bus-bar room 10; the upper right side of cabinet shell 50 is provided with relay control room 30; various control protective devices are installed in the relay control room 30; measuring component; instrument and low pressure splicing ear row etc.; be handcart chamber 20 between bus-bar room 10 and the relay control room 30; cable vault 40 is set in its complementary space; cabinet the shell 50 and dividing plate 70 that four chambers separate is assembled into one; dividing plate 70 adopts aluminizing zinc steel plate; aluminizing zinc steel plate has very strong anticorrosion and antioxidation, and has the mechanical strength higher than equal steel plate, as shown in Figure 1.

In conjunction with Fig. 1, be provided with three-phase main bus bar 12 in the described bus-bar room 10, three-phase main bus bar 12 is drawn three branch bars 13 and is linked to each other with upper static contact 14 respectively, upper static contact 14 is positioned at upper static contact box 15, three holes are arranged on the cabinet left side wall, be used to install isolated bus sleeve pipe 11, three-phase main bus bar 12 is erected between the bus casing 11, this structure can separate the bus-bar room between cabinet and the cabinet, the accident that can prevent enlarges, and has enough space mounting to be up to the bus of 4000A in the bus-bar room 10 of the present invention.

In conjunction with Fig. 1,2, be provided with handcart 23 in the described handcart chamber 20, circuit breaker 24 and other auxiliary equipment are housed on the handcart 23, in the present invention, circuit breaker 24 adopts vacuum circuit-breaker, the lower end of handcart chamber 20 is provided with guide plate 25, and the both sides of handcart chamber 20 are provided with discharge gate operating mechanism 21, and discharge gate operating mechanism 21 opens or closes with the turnover of handcart 23.What circuit breaker 24 and cabinet adopted is mid-pull-out type, so both has been convenient to operation, has observed, and is convenient to advance and retreat, transhipment, the maintenance of circuit breaker 24 again, and what circuit breaker 24 moved employing in cabinet is the screw mandrel propulsive mechanism, makes circuit breaker 24 very easily reliable when turnover.Handcart skeleton employing sheet metal assembles after the CNC machine tooling, and handcart 23 and cabinet insulation coordination are equipped with safe and reliable interlock in the switch cubicle, satisfies " five is anti-" interlock requirement fully, mechanical interlocking safety, reliable, flexible, and particular content is as follows:

The first, the switch of band key is housed, to prevent that mistake from closing, mistake is divided circuit breaker 24 in 30 of the relay control rooms;

The second, only when experiment or service position, circuit breaker 24 just can close/sub-switching operation handcart 23, and after circuit breaker 24 closed a floodgate, handcart 23 can't move, and has prevented that on-load from drawing mistake to close insulating contact by mistake;

The 3rd, circuit breaker 24 and earthed switch 46 mechanical interlockings, have only when handcart 23 in cabinet test position or withdraw from cabinet after, earthed switch 46 could close a floodgate, while handcart 23 can not enter cabinet (earthed switch can display unit with voltage).During the service position, earthed switch 46 can not close a floodgate handcart 23 in cabinet.Realized like this preventing that charged splice grafting ground switch 46 and earthed switch 46 from not closing circuit breaker 24 before the separating brake;

The 4th, interlocking between cabinet Xiamen and handcart 23 and the earthed switch 46 has only circuit breaker 24 separating brakes and is in when testing position and earthed switch 46 combined floodgates and just can open, and this has just prevented mistakenly entering charged chamber and has realized emergency release;

The 5th, handcart 23 is not in test or service position and when controlling voltage, only manual separating brake;

The 6th, handcart 23 is when the service position, and secondary plug 22 can not be extracted.

In conjunction with Fig. 1,2, in the described cable vault 40 fixed contact box 41 is set down, following fixed contact 42 is positioned at fixed contact box 41 down, the branch bar 13 that following fixed contact 42 is drawn links to each other with the input of current transformer 43, the output of current transformer 43 divides three tunnel outputs, first via 43B connects power consumption equipment by cable 44, and the second road 43A is by lightning arrester 45 ground connection, and Third Road 43C is by earthed switch 46 ground connection.The top of described bus-bar room 10, handcart chamber 20 and cable vault 40 is provided with pressure relief device 60.When breaking down electric arc in handcart chamber 20, bus-bar room 10 or the cable vault 40, follow the appearance of electric arc, the switch cubicle air pressure inside rises, after reaching certain pressure, the pressure of top arrangement discharges metallic plate and will be opened automatically, release pressure and drainage gas are to guarantee the safety of operating personnel and switch cubicle.Be provided with heater 80 in described cable vault 40 and the handcart chamber 20.In order to prevent in the bigger climatic environment of high humility and variations in temperature, to produce the danger that condensation brings, in the cable vault 40 and handcart chamber 20 install heater respectively, and the employing auto-control mode, so that among above-mentioned environment, use, prevent the generation of corroding simultaneously.

If the user has when required, can be provided with the selectable unit that detects the primary circuit operation in the switch cubicle is charged display unit 90.This device is made up of

high pressure sensor

91 and 92 two unit of display.This device not only can be pointed out the high tension loop charged state, but also can cooperate with electromagnetic lock, realize mandatory latch switch handle, net door etc., reach and prevent full splice grafting ground, charged pass switch, prevent mistakenly entering charged chamber, thus the anti-error performance of raising complete sets of products.

In sum, core of the present invention is cabinet shell 50 and dividing plate 70 adopts assembling but not welding stress has been avoided in welding, and in addition, volume of the present invention is little, Installation and Debugging convenient.

Claims

1, a kind of intermediate switchgear cabinet, comprise cabinet shell (50), it is characterized in that: dividing plate (70) is divided into bus-bar room (10), handcart chamber (20), relay control room (30) and cable vault (40) with the enclosure space that cabinet shell (50) surrounds by function, and dividing plate (70) is assembled into one with cabinet shell (50).

2, intermediate switchgear cabinet according to claim 1 is characterized in that: described dividing plate (70) adopts aluminizing zinc steel plate.

3, intermediate switchgear cabinet according to claim 1, it is characterized in that: described bus-bar room (10) is positioned at the upper left side of cabinet shell (50), relay control room (30) is positioned at the upper right side of cabinet shell (50), between bus-bar room (10) and relay control room (30) is handcart chamber (20), and cable vault (40) is set in its complementary space.

4, according to claim 1 or 3 described intermediate switchgear cabinets, it is characterized in that: be provided with three-phase main bus bar (12) in the described bus-bar room (10), three-phase main bus bar (12) is erected between the bus casing (11), three-phase main bus bar (12) is drawn three branch bars (13) and is linked to each other with upper static contact (14) respectively, and upper static contact (14) is positioned at upper static contact box (15).

5, according to claim 1 or 3 described intermediate switchgear cabinets, it is characterized in that: fixed contact box (41) is set down in described cable vault (40), following fixed contact (42) is positioned at fixed contact box (41) down, the branch bar (13) that following fixed contact (42) is drawn links to each other with the input of current transformer (43), the output of current transformer (43) divides three tunnel outputs, the cable (44) of leading up to connects power consumption equipment, lead up to lightning arrester (45) ground connection, another road is by earthed switch (46) ground connection.

6, according to claim 1 or 3 described intermediate switchgear cabinets, it is characterized in that: be provided with handcart (23) in the described handcart chamber (20), handcart (23) is provided with circuit breaker (24), the lower end of handcart chamber (20) is provided with the guide plate (25) that is used to lead, the both sides of handcart chamber (20) are provided with discharge gate operating mechanism (21), and upper and lower moving contact matches with circuit breaker (24).

7, intermediate switchgear cabinet according to claim 1 is characterized in that: the top of described bus-bar room (10), handcart chamber (20) and cable vault (40) is provided with pressure relief device (60).

8, intermediate switchgear cabinet according to claim 1 is characterized in that: be provided with heater (80) in described cable vault (40) and handcart chamber (20).