CN201699343U - Indoor Metal Armored Withdrawable Switchgear - Google Patents

Abstract

The utility model discloses an indoor metal armor draw-out switchgear, it includes the armor cabinet body, be equipped with generating line room, circuit breaker handcart room, cable chamber and relay instrument room in the armor cabinet body, relay instrument room is located the upper portion of the anterior part of the armor cabinet body, and circuit breaker handcart room is located relay instrument room below, the generating line room is located circuit breaker handcart room rear, the cable chamber is located the generating line room below; a circuit breaker handcart is arranged in the circuit breaker handcart chamber, a heating device is arranged on the circuit breaker handcart, a valve is arranged between the bus chamber and the circuit breaker handcart chamber, a static contact box is arranged on the valve, and a static contact device in the static contact box is in switch fit with the circuit breaker handcart; and a secondary plug is arranged on the cabinet wall above the handcart room of the circuit breaker and is connected with the handcart of the circuit breaker. The utility model discloses novel structure, it is small, both make things convenient for fast assembly, convenient to overhaul again, the while operation safe and reliable satisfies "five prevent" requirements completely.

Description

Indoor Metal Armored Withdrawable Switchgear

technical field

The utility model relates to an electric switchgear, in particular to an indoor metal-clad withdrawable switchgear.

Background technique

At present, as an indoor complete set of power distribution equipment for receiving and distributing electric energy, fixed switchgear is mainly used for power receiving, power transmission, control and control of motors and transformers in power plants, industrial and mining enterprises, and substations in power systems. under protection. The existing fixed switchgear is a box-type fixed structure, which generally has the disadvantages of large volume and large floor space. In particular, there is no pressure relief device between each isolation room. Once an internal failure occurs, it is easy to endanger the personal safety of operating personnel. At the same time, due to the unreasonable layout of the fixed switchgear, it is not only difficult to overhaul, but also lacks sufficient safety guarantees and safety measures. Operability.

Utility model content

The purpose of this utility model is to improve the shortcomings of the existing technology and products, and to provide an indoor metal armored withdrawable switchgear. The indoor metal armored withdrawable switchgear is novel in structure, small in size, convenient and quick to assemble, It is also convenient for maintenance, and at the same time, it is safe and reliable in operation and fully meets the requirements of "five defenses".

In order to achieve the above purpose, the utility model provides an indoor metal armored withdrawable switchgear, the indoor metal armored withdrawable switchgear includes an armored cabinet, and a busbar room is arranged in the armored cabinet , circuit breaker handcart room, cable room and relay instrument room, the relay instrument room is located at the upper part of the front of the armored cabinet, the circuit breaker handcart room is located below the relay instrument room, and the busbar room is located at the Behind the circuit breaker handcart room, the cable room is located below the busbar room; a circuit breaker handcart is arranged in the circuit breaker handcart room, a heating device is arranged on the circuit breaker handcart, and the busbar There is a valve between the room and the handcart of the circuit breaker, and a static contact box is installed on the valve. A secondary plug is arranged on the cabinet wall above the vehicle compartment, and the secondary plug is connected with the handcart of the circuit breaker.

Further, in order to increase the independence and safety of each room, and effectively prevent the extension of the arc, so that the possible faults are limited to the minimum range, the busbar room, circuit breaker handcart room, cable room and The relay instrument rooms are separated by metal partitions.

Further, in order to ensure the safety of operators and switch cabinets, pressure relief devices are installed on the busbar room, circuit breaker handcart room and cable room, so that when an internal fault occurs in the circuit breaker or busbar, the pressure relief at the top The unit opens automatically, releasing pressure and venting gas.

Further, in order to make the operation of the circuit breaker handcart more convenient, so that the circuit breaker can only be moved when it is in the working or test position when the circuit breaker is closed or opened, rails are installed on the cabinet walls on both sides of the circuit breaker handcart room. , the circuit breaker handcart is installed on the track through a turbine and a worm.

Further, the moving contact on the secondary plug is connected to the handcart of the circuit breaker through a nylon corrugated telescopic tube. When the secondary plug and the short-circuit handcart are working, due to the action of the interlock mechanism, the secondary plug is locked and cannot be pulled out, thus ensuring the safety of the user.

Further, in order to allow users to enter the cabinet to install or maintain equipment, the bottom plate of the circuit breaker handcart room is a withdrawable horizontal partition.

Compared with existing products, the utility model has the following positive and beneficial effects:

1. The utility model has a reliable interlocking device, which fully meets the requirements of "five defenses" and ensures the personal safety of operators and equipment safety.

(1) There are prompt buttons or switches on the door of the instrument room to prevent the circuit breaker from being closed or opened by mistake.

(2) When the circuit breaker handcart is in the "test" or "working" position, the circuit breaker can be opened and closed, and after the circuit breaker is closed, the handcart cannot move to prevent the circuit breaker handcart from being pushed and pulled under load.

(3) Only when the grounding switch is in the opening position, the circuit breaker handcart can move from the "test/disconnect" position to the "working" position; only when the circuit breaker handcart is in the "test/disconnect" position, The grounding switch can perform the opening operation (the grounding switch can be equipped with a voltage display device). This prevents the electrified grounding switch from being closed by mistake and prevents the short circuit from being closed when the grounding switch is in the closed position.

(4) When the grounding switch is in the opening position, the lower door and the rear door cannot be opened, which prevents mistaken entry into the electrified compartment.

(5) When the handcart of the circuit breaker is indeed in the "test" or "working" position, and there is no control voltage, it can only be opened manually, but cannot be closed.

(6) When the handcart of the circuit breaker is in the "working" position, the secondary plug is locked and cannot be pulled out.

2. The switchgear has complete metal armor and fully enclosed structure, and the low-voltage chamber and each high-voltage compartment are separated independently

3. Small size, not only convenient and fast assembly, but also convenient for maintenance.

4. Stable performance, reasonable structure, convenient use and wide application range.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing.

As shown in Figure 1, an indoor metal armored draw-out switchgear includes an armored cabinet body 1, and the armored cabinet body 1 is provided with a busbar room 2, a circuit breaker handcart room 3, a cable room 4 and Relay instrument room 5, relay instrument room 5 is located in the upper part of the front of armored cabinet body 1, circuit breaker handcart room 3 is located below relay instrument room 5, busbar room 2 is located behind circuit breaker handcart room 3, and cable room 4 is located in the busbar Below the chamber 2, the busbar chamber 2, the circuit breaker handcart chamber 3, the cable chamber 4 and the relay instrument chamber 5 are separated by a metal partition 6.

The main busbar 7 is arranged in the said busbar room 2, and the main busbar 7 is a single splicing and interpenetrating connection, and is fixed by the branch busbar 8 and the static contact box 9, and the main busbar 7 of the adjacent cabinet is fixed by the busbar bushing 10.

Described cable room 4 comprises current transformer 11, grounding switch 12, cable 13 and lightning arrester 14, and described current transformer 11 and grounding switch 12 are installed on the cabinet rear wall of this cable room 4, and described lightning arrester 14 Installed in the rear lower part of the cable room 4 and connected with the bottom plate of the armored cabinet 1.

The circuit breaker handcart room 3 is provided with a circuit breaker handcart 15, the circuit breaker handcart 15 is provided with a heating device 16, the busbar room 2 and the circuit breaker handcart room 3 are provided with a valve 17, the valve 17 and The static contact box 9 is connected, and the static contact device 18 in the static contact box 9 is in switch cooperation with the circuit breaker handcart 15; the cabinet wall above the circuit breaker handcart room 3 is provided with a secondary plug 19 , the moving contact on the secondary plug 19 is connected to the circuit breaker handcart 15 through the nylon corrugated telescopic tube 20, the control small wire slot 21 is located below the circuit breaker handcart chamber 3, and the two side cabinets in the circuit breaker handcart chamber 3 Rails are installed on the wall, and the circuit breaker handcart 15 is located on the rails to advance and withdraw through the turbine and worm, and the bottom plate of the circuit breaker handcart chamber 3 is a drawable horizontal partition 22 .

A pressure relief device 23 is installed on the busbar room 2 , the circuit breaker handcart room 3 and the cable room 4 .

When in use, first make the circuit breaker handcart 15 in the test position, insert the secondary plug 19 on the switchgear, and further confirm the position of the circuit breaker handcart 15 by observing the indicator light on the relay instrument room 5 ( Judging by the panel indication plate on the circuit breaker handcart 15 or the opening indicator light on the relay instrument room 5), turn the operating rocker until the upper and lower static contact boxes 9 linked with the circuit breaker handcart room 3 in the cabinet The valve 17 on the circuit breaker is automatically opened, the main circuit is connected, the handcart 15 of the circuit breaker is in the working position, and it can be closed and opened through the control circuit.

When the circuit breaker handcart 15 is withdrawn from the working position to the test or disconnection position, the valve 17 will automatically close to block the static contact box 9, forming an effective isolation, and the upper and lower valves 17 are not linked, so that the live valve can be locked 17. The personal safety of maintenance personnel is guaranteed. Since the main busbar 7 in the busbar room 2 is fixed by the branch busbar 8 and the static contact box 9, and the main busbar 7 is covered with heat shrinkable sleeves, connecting bolt insulating sleeves and end caps, the main busbar 7 of the adjacent cabinet is covered with a busbar bushing 10 fixed, so as to prevent the arc from being penetrated and melted when a fault occurs inside the cabinet, and the accident can be limited in the compartment without spreading to the outside of the cabinet. The horizontal partition 22 enters the cabinet for installation and maintenance.

The current transformer 11, grounding switch 12 and lightning arrester 14 in the cable room 4 ensure the safety and reliability of use. If the circuit breaker handcart 15 needs to be removed from the cabinet, it must first be ensured that the circuit breaker handcart 15 is in the test position. Remove the auxiliary circuit plug, push the transfer cart to the front of the cabinet and pull out the circuit breaker handcart 15. When a fault arc occurs in the circuit breaker or the busbar room 2, the air pressure in the switch cabinet rises, and since the sealing ring installed on the door closes the front of the cabinet, the pressure relief device 23 equipped on the top automatically opens to release the pressure and discharge the gas. Thereby the interlocking function is truly realized, and the load-preventing push-pull circuit breaker handcart 15 of the switchgear is realized, which prevents the wrong opening and closing of the circuit breaker, prevents the grounding switch 12 from closing the circuit breaker when it is in the closed position, and prevents accidental opening and closing of the circuit breaker. Entering the charged compartment prevents the interlocking function of mistakenly closing the grounding switch 12 when charged, and fully meets the requirements of the five defenses.

In summary, the embodiment described in the present invention only provides a best embodiment, and the technical content and technical characteristics of the present invention have been disclosed above, but those familiar with this technology may still be based on the content disclosed in the invention. Various replacements and modifications that do not depart from the creative spirit of the present invention are made; therefore, the protection scope of the present invention is not limited to the technical content disclosed in the embodiments, so all equivalent changes made according to the shape, structure and principle of the present invention are valid. covered within the protection scope of the present invention.

Claims (6)

1. indoor metal armoring draw out switchgear, it is characterized in that: described indoor metal armoring draw out switchgear comprises the armouring cabinet, be provided with bus-bar room, circuit breaker cart chamber, cable vault and relay control room in the described armouring cabinet, described relay control room is positioned at the top of armouring cabinet front portion, described circuit breaker cart chamber is positioned at below, described relay control room, described bus-bar room is positioned at rear, described circuit breaker cart chamber, and described cable vault is positioned at described bus-bar room below; Described circuit breaker cart is provided with circuit breaker cart in the chamber, this circuit breaker cart is provided with heater, be provided with valve between described bus-bar room and circuit breaker cart chamber, the fixed contact box is installed on this valve, the static contact head device in this fixed contact box is switch with described circuit breaker cart and cooperates; The cabinet wall of top, described circuit breaker cart chamber is provided with secondary plug, and this secondary plug is connected with described circuit breaker cart.

2. indoor metal armoring draw out switchgear according to claim 1 is characterized in that: adopt metal partion (metp) to isolate between described bus-bar room, circuit breaker cart chamber, cable vault and the relay control room.

3. indoor metal armoring draw out switchgear according to claim 1 is characterized in that: in described bus-bar room, circuit breaker cart chamber and the cable vault pressure relief device is installed all.

4. indoor metal armoring draw out switchgear according to claim 1 and 2 is characterized in that: on the indoor both sides cabinet wall of described circuit breaker cart track is installed, described circuit breaker cart is installed on the described track by turbine, worm screw.

5. indoor metal armoring draw out switchgear according to claim 4 is characterized in that: the moving contact on the described secondary plug links to each other with circuit breaker cart by the nylon bellows.

6. indoor metal armoring draw out switchgear according to claim 5 is characterized in that: the base plate of described circuit breaker cart chamber is withdrawable horizontal baffle.

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