CN201315435Y - Armored mid-set AC metal closed switch device - Google Patents

Abstract

The utility model relates to an armored middle-mounted AC metal-enclosed switchgear, which includes an armored body cabinet, which is composed of a busbar room, a circuit breaker handcart room, a cable room, and a relay instrument room. Located at the front of the armored cabinet and protruding from the upper end of the cabinet, the busbar room is located at the upper part of the rear of the cabinet where the relay instrument room is located, the cable room is below the relay instrument room, the circuit breaker handcart room is located under the relay instrument room, and the circuit breaker The handcart is located in the handcart room of the circuit breaker, and the cable room is located under the busbar room. Advantages: First, it effectively prevents the extension of the arc, which increases the safety and reliability of the equipment; second, it realizes the maintenance of the whole cabinet without power failure; Brake, and the circuit breaker handcart only in the open state, the circuit breaker can move, to achieve the requirements of the five defenses.

Description

Armored mid-mounted AC metal-enclosed switchgear

technical field

The utility model relates to an armored middle-mounted AC metal-enclosed switchgear, which belongs to the field of electric equipment manufacturing.

Background technique

In the current power system, due to the unreasonable layout of the armored mid-mounted AC metal-enclosed switchgear, it is not only difficult to overhaul, but also lacks sufficient safety guarantees and safety measures, which is not conducive to the safe operation and rapid maintenance of the equipment, nor can it be realized. Quick assembly and debugging, and lack of operability.

Contents of the invention

Design purpose: To avoid the deficiencies in the background technology, and to design an armored center-mounted AC metal-enclosed switchgear that is convenient for quick assembly and maintenance. Design scheme: In order to achieve the above design purpose. 1. The armored body cabinet adopts the design of assembled structure, which is one of the characteristics of the design of the utility model. The purpose of doing this is: not only to improve the matching precision between the handcart and the cabinet, but also to quickly organize production and assembly, and it has the characteristics of beautiful appearance. 2. The main busbar room, the relay instrument room and the cable room are separated by a grounded metal partition, which is the second feature of the design of the utility model. The purpose of doing this is to increase the independence and safety of each chamber, and effectively prevent the extension of the arc, so that the possible faults are limited to a small range. 3. The design of the handcart room, the main busbar room, the relay instrument room and the cable room pressure relief passage is three of the characteristics of the utility model design. The purpose of doing this is: when a certain part needs to be replaced or repaired, there is no need to cut off the power of the whole cabinet, and only need to cut off the power supply at both ends of the component, and the maintenance personnel can safely enter the room. 4. The circuit breaker handcart is placed in the middle of the switchgear and adopts the design of turbine and worm to propel and withdraw by shaking, which is the fourth characteristic of the design of the utility model. The purpose of this is: not only to increase the space of the cable room, but also to facilitate the multi-connection of multiple cables, and to make the operation more convenient. In the working or test position, the circuit breaker is closed and can only be moved when it is opened, which increases the safety of use. 5, the design that the valve and the static contact box are mounted on the valve in the partition between the busbar chamber and the circuit breaker handcart chamber are five of the characteristics of the utility model design. The purpose of doing this is to make the static contact device in the static contact box and the circuit breaker handcart form a switch cooperation. When in use, when the handcart moves from the disconnected and test position to the working position, the valve opens automatically, and when it moves in the opposite direction, the valve automatically closes to cover the static contact box, thereby forming an effective isolation. At the same time, during maintenance, the valve on the live side can be locked to ensure the safety of use. 6. The design that the bus bars of adjacent cabinets are covered by heat-shrinkable sleeves and fixed by sleeves is the sixth feature of the design of the utility model. The purpose of this is to ensure that there is an air buffer between the busbars of adjacent cabinets, and prevent it from penetrating and melting when an internal fault arc occurs, so that the accident can be limited to the compartment and not spread to other cabinets. 7. The design of drawable horizontal partition and loading and unloading partition built into the cable chamber is seven of the design features of the utility model. The purpose of doing this is to ensure that the user can enter the cabinet from the front for installation or maintenance, making the operation and maintenance more convenient. 8. The design that the control circuit is laid in the line groove with a metal cover plate and the top plate of the instrument room can be turned over is the eighth characteristic of the design of the utility model. The purpose of doing this is to isolate the secondary line from the high-voltage chamber to ensure the safety of use, and at the same time combine the flipped cover plate to facilitate the installation of the branch bus. 9. The design of the pressure relief device on the circuit breaker handcart room, busbar room and cable room is the ninth feature of the utility model design. The purpose of this is: when an internal fault arc occurs in the circuit breaker or the busbar, the internal air pressure of the switchgear rises, the special sealing ring installed on the door closes the front of the cabinet, and the pressure relief metal plate on the top opens automatically to release the pressure And exhaust gas, to ensure the safety of operators and switchgear. 10. The design of reliable interlocking device is housed in the switchgear, which is the tenth feature of the utility model design. The purpose of doing this is to prevent the handcart of the circuit breaker from being pushed and pulled under load, to prevent the circuit breaker from being opened and closed by mistake, to prevent the circuit breaker from being closed when the grounding switch is in the closed position, to prevent entering the electrified compartment by mistake, and to prevent the circuit breaker from being mistakenly closed and grounded when it is charged. The interlock function of the switch fully meets the requirements of the five defenses. 11. The design that the connection between the secondary line on the switchgear and the secondary line of the circuit breaker handcart is realized by the secondary plug is the eleventh feature of the utility model design. The purpose of doing this is: the moving contact of the secondary plug is connected with the handcart of the circuit breaker through a nylon corrugated telescopic sleeve, and the secondary static contact seat is installed in the handcart room of the switch cabinet. Only when the handcart of the circuit breaker is in the test and disconnection position can the secondary plug be plugged in or removed. When the handcart of the circuit breaker is in operation, due to the mechanical interlocking effect, the secondary plug is locked and cannot be pulled out, thus ensuring the safety of the user. Safety. 12. Both the circuit breaker room and the cable room are equipped with heaters, which is the twelfth feature of the utility model design. The purpose of doing this is to facilitate the generation of condensation in a climate environment with high temperature and humidity or a large temperature change, prevent corrosion of the equipment, and make it operate normally. 13. The design of the charged display device is housed in the switchgear, which is the thirteenth feature of the utility model design. The purpose of doing this is: the device is composed of a high-voltage sensor and a portable display and is connected with an outdoor conductive wire. It can not only prompt the live state of the high-voltage circuit, but also cooperate with the electromagnetic lock to realize the forced locking of the switch handle and the net door. , to prevent the grounding switch from being charged and to prevent mistaken entry into the charged interval, thereby improving the error-proof performance of supporting products.

Technical solution: Armored middle-mounted AC metal-enclosed switchgear, which includes an armored body cabinet, which is composed of a busbar room, a circuit breaker handcart room, a cable room, and a relay instrument room. The front of the cabinet protrudes from the upper end of the cabinet, the busbar room is located at the upper part of the rear of the cabinet, the relay instrument room is located under the relay instrument room, the circuit breaker handcart room is located under the relay instrument room, and the circuit breaker handcart is located at In the handcart room of the circuit breaker, the cable room is located under the busbar room.

Compared with the background technology, the utility model has two advantages: one is that the busbar room, the relay instrument room and the cable room are separated by a grounded metal partition, which effectively prevents the extension of the arc and increases the safety and reliability of the equipment; The design of the vehicle room, busbar room, relay instrument room and cable room pressure relief channel has realized the maintenance of the whole cabinet without power failure; the third is the design of the circuit breaker trolley, which makes the design of the equipment more modular and integrated, which is convenient for installation, commissioning, maintenance and maintenance. operation; the fourth is the design of the mechanical interlocking machine of the circuit breaker handcart, which ensures that the circuit breaker can only be closed when the circuit breaker handcart is in the working position or test position, and the circuit breaker handcart is only in the open state. The fifth is the design of the interlocking structure between the circuit breaker handcart, the grounding switch and the cabinet door, which meets the requirements of the five defenses.

Description of drawings

Figure 1 is a schematic diagram of armored mid-mounted AC metal-enclosed switchgear.

Detailed ways

Embodiment 1: with reference to accompanying drawing 1. Armored center-mounted AC metal-enclosed switchgear, which includes an armored body cabinet 5, which is composed of a busbar room 1, a circuit breaker handcart room 16, a cable room 11, and a relay instrument room 18. The busbar room 1 , Circuit breaker handcart room 16, cable room 11, and relay instrument room 18 are separated by metal partitions. Busbar room 1, circuit breaker handcart room 16, and cable room 11 are respectively provided with pressure relief channels and circuit breaker handcart rooms. , The busbar room and the cable room are equipped with a pressure relief device 1-1. There is a valve 13 in the partition between the bus room 1 and the circuit breaker handcart room 16, the static contact box 6 is installed on the valve 13 and the static contact device 5 in the static contact box 6 is in the same shape as the circuit breaker handcart 15. switch fit. The relay instrument room 18 is located at the front of the armored cabinet body 5 and protrudes from the upper end surface of the cabinet body 5. The busbar room 1 is located at the upper part of the rear of the cabinet body, and the cable room 11 is below the relay instrument room 18. In the cable room 11. The circuit breaker handcart room 16 is located under the relay instrument room 18 , the circuit breaker handcart 15 is located in the circuit breaker handcart room 16 , and the cable room 11 is located under the busbar room 1 . Both sides of the circuit breaker handcart chamber 16 are equipped with tracks, the circuit breaker handcart 15 is located on the track and adopts turbine and worm to shake and advance and withdraw, and the circuit breaker handcart 15 is equipped with a vacuum circuit breaker. The secondary static contact seat 14 is located on the cabinet wall above the handcart room 16 of the circuit breaker and is connected to the secondary line of the handcart of the circuit breaker through a manual secondary plug. 15 connected handcarts. The bottom plate 17 of the circuit breaker handcart compartment 16 is a withdrawable horizontal partition, and the lower part of the circuit breaker handcart compartment 16 is a small control wire slot 1-2. When using, first put the circuit breaker handcart 15 in the test position, insert the secondary plug on the switchgear, and further confirm the opening state of the circuit breaker handcart by observing the indicator light on the panel of the instrument room (judged by the panel indicator on the handcart or the opening indicator light on the panel of the instrument room), turn the operating rocker until the upper and lower static contact boxes 6 linked with the circuit breaker handcart room 16 in the cabinet The valve 13 of the circuit breaker is automatically opened, the main circuit is connected, the handcart of the circuit breaker is in the working position, and it can be closed and opened through the control circuit. When the handcart is withdrawn from the working position to the test or disconnected position, the valve 13 will automatically close and cover the static contact box 6, forming an effective isolation, and the upper and lower valves are not linked, so that the live valve can be locked, ensuring Personal safety of maintenance personnel. The main busbar 4 in the busbar room 1 is fixed by the branch busbar 2 and the static contact box 6, the main busbar 4 is connected to the static contact box by bolts, and the busbar is covered with heat shrinkable sleeves, insulating sleeves and end caps for connecting bolts, corresponding The adjacent cabinet busbar is fixed with casing 3. Therefore, when the internal fault arc is prevented, it can be prevented from penetrating and melting, and the accident is limited to the compartment without spreading to other cabinets. By moving the handcart and the draw-out horizontal partition 17 and the loading and unloading partition 12, the cabinet can be installed and maintained frontally. The current transformer 7, grounding switch 8, and lightning arrester 10 in the cable room ensure that the use is safer and more reliable. If you need to remove the handcart 15 of the circuit breaker from the cabinet, you must first ensure that the handcart is in the test position, unplug the auxiliary circuit plug, push the transfer cart to the front of the cabinet and pull the handcart out, you must use a specific means of transportation To remove the handcart. When there is an arc fault in the circuit breaker room or the busbar room, the air pressure of the switch cabinet will rise, and the special seal ring installed on the door will seal the front of the cabinet, and the pressure relief device 1-1 equipped on the top will automatically open to release the pressure and discharge the gas. Ensure the safety of operators and switchgear. In this way, the interlocking function is really achieved, and the switchgear is prevented from pushing and pulling the handcart of the circuit breaker under load, preventing the circuit breaker from being opened and closed by mistake, preventing the circuit breaker from being closed when the grounding switch is in the closed position, preventing it from entering the charged compartment by mistake, preventing The interlock function of mistakenly closing the grounding switch when electrified fully meets the requirements of the five defenses.

It should be understood that: although the above-mentioned embodiments have described the utility model in more detail, these text descriptions are only simple text descriptions of the design ideas of the utility model, rather than restrictions on the design ideas of the utility model. The combination, addition or modification of the design idea of the utility model all fall within the protection scope of the utility model.

Claims (10)

1, a kind of armouring middle ac metal closing switch gear, it comprises armouring body cabinet, be provided with bus-bar room, circuit breaker cart chamber, cable vault, relay control room composition in the armouring body cabinet, it is characterized in that: the relay control room is positioned at armouring cabinet front portion and protrudes from the cabinet upper surface, bus-bar room is positioned at the top that the relay control room is positioned at the cabinet rear portion, below, relay control room, cable vault, the circuit breaker cart chamber is positioned at below, relay control room, it is indoor that circuit breaker cart is positioned at circuit breaker cart, and the cable vault is positioned at the bus-bar room below.

2, armouring middle ac metal closing switch gear according to claim 1 is characterized in that: adopt metal partion (metp) to isolate between bus-bar room, circuit breaker cart chamber, cable vault, the relay control room.

3, armouring middle ac metal closing switch gear according to claim 2, it is characterized in that: bus-bar room, circuit breaker cart chamber, cable vault are respectively equipped with pressure release passage.

4, armouring middle ac metal closing switch gear according to claim 1, it is characterized in that: track is equipped with in the indoor both sides of circuit breaker cart, and circuit breaker cart is positioned on the track and adopts turbine, worm screw to shake propelling, withdraw from.

5, according to claim 1 or 4 described armouring middle ac metal closing switch gears, it is characterized in that: circuit breaker cart is equipped with vacuum circuit-breaker.

6, armouring middle ac metal closing switch gear according to claim 1, it is characterized in that: be provided with valve in the dividing plate between in the bus-bar room and circuit breaker cart chamber, fixed contact box-packed on valve and the static contact head device in the fixed contact box be switch with circuit breaker cart and cooperate.

7, armouring middle ac metal closing switch gear according to claim 1 is characterized in that: secondary fixed contact seat is positioned on the cabinet wall of circuit breaker cart chamber top and by manual secondary plug and is connected with the secondary line of circuit breaker cart.

8, armouring middle ac metal closing switch gear according to claim 7, it is characterized in that: the moving contact of secondary plug links by nylon bellows and circuit breaker cart.

9, armouring middle ac metal closing switch gear according to claim 1 is characterized in that: in described circuit breaker cart chamber, bus-bar room and the cable vault pressure relief device is housed all.

10, armouring middle ac metal closing switch gear according to claim 1, it is characterized in that: the base plate of circuit breaker cart chamber is withdrawable horizontal baffle.