RU2766310C2 - Adaptive equipment complex cad-6 - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and can be used for operation in electrical power units of three-phase alternating current with a frequency of 50 (60) Hz and rated voltage of 6 kV. The technical result is achieved by the adaptive equipment complex CAD-6 for 6 kV electrical cabinets comprising rigid framing in shape of a metal frame, a set of flexible connector bus adapters, a power switch, a voltage transformer and fastening hardware. The power switch includes a pull-out cross-connect module and a fixed counterpart of the power switch, wherein the transformer and the power switch are mounted on the metal frame, wherein the fixed counterpart of the power switch is rigidly attached to the metal frame. A set of connector bus adapters is installed in the upper part of the power switch, said set comprised of a large, a medium and a small buses configured to move between themselves when the set of flexible connector bus adapters is connected by the fastening hardware configuring the connecting dimensions thereof to coincide with the internal dimensions of the 6 kV electrical cabinets.

EFFECT: simplified assembly, adjustment and maintenance of elements of electrical cabinets during modernization and replacement of cross-connect equipment, including the previous power switch.

1 cl, 2 dwg

Description

Description of the invention

The invention relates to the field of electrical engineering and can be used for operation in electric power installations of three-phase alternating current with a frequency of 50 (60) Hz and a rated voltage of 6 kV, namely, it relates to the design of elements of electrical cabinets and devices used in the modernization, reconstruction and replacement of switchgears.

From the existing state of the art, various solutions for the design of draw-out elements of a complete switchgear cabinet /1/ are known. The disadvantages of this technical solution are large overall dimensions and fixed dimensions of the structure, primarily due to the use of the same type of power switches, this design is not universal for any type of electrical cabinets. Designed for use in electrical cabinets previously designed for this equipment, with its overall dimensions.

Also known is the design solution for the drawer element of the cabinet of the complete switchgear /2/. The disadvantages of this technical solution is the location of the power equipment compartment with a switch on a retractable element above the cable compartment, which requires the use of a special additional inventory trolley for servicing the power switch. The design of the drawer has fixed dimensions, which is why it is not universal for any type of electrical cabinets. Designed for use in electrical cabinets, previously designed for this equipment with its overall dimensions.

Known adaptation kits with a power switch /3/ intended for use in existing electrical panels, containing metal structures, frame, busbar elements, power switch, voltage transformers, disconnectors and earthing switches, support insulators; moreover, the power vacuum circuit breaker, busbar elements and frame are supplied separately and installed at the installation site. To carry out the installation of the adaptation kit of the power vacuum circuit breaker, it is necessary to have specially trained specialists and tools, as well as additional time for the assembly of the structure at the installation site.

The disadvantage of this device is the need for additional work at the installation site, namely the assembly of the main components, fitting the tires and the metal frame during the operation of the equipment.

The closest to the proposed device is an adaptation kit for retrofit (modernization) of existing electrical panels /4/, containing a fixed metal structure consisting of a power frame, power equipment (switch, voltage transformer), a busbar kit, a switch (power or load switch), elements fasteners. At the same time, the switch, voltage transformers are installed on the frame, and the busbar is measured, adjusted and adjusted to the connecting dimensions at the installation site.

The disadvantage of this device is the complexity of assembly, adjustment and maintenance of its elements due to the need to select and adjust the geometric connecting dimensions during installation, the need for additional drilling and cutting at the installation site, the difficulty of accessing them when connecting with existing elements of electrical cabinets.

The purpose of the invention is to simplify the assembly, adjustment and maintenance of elements of electrical cabinets during the modernization and replacement of switching equipment, including the old power switch.

This goal is achieved by the fact that in the Adaptation Equipment Complex KAD-6 (hereinafter KAD-6), which consists of a metal structure with a rigid frame in the form of a frame, a set of flexible transitional bus adapters, power equipment (switch, voltage transformer, basket-chassis, handle for circuit breaker racking in and out), a set of fasteners, all elements are assembled together, and the metal structure and a set of flexible adapter busbars are installed and assembled together with the power equipment as a complete set, and are ready for installation and installation at the installation site, requiring no additional assembly. The fixed mating part of the circuit breaker is rigidly attached to the metal frame using frame fasteners. In the upper part of the power switch there is a set of transitional busbar adapters, consisting of large, medium and small busbars, made with the possibility of moving between themselves when articulated by fasteners of a set of flexible transitional busbar adapters, ensuring that their connecting dimensions match the internal dimensions of 6 kV electrical cabinets and ensure a single current-carrying circuit.

At the same time, with the help of flexible transitional busbar adapters, it is possible to adjust the connecting dimensions in relation to existing electrical cabinets. Due to this, the geometrical connecting dimensions of the KAD-6 Adaptation Equipment Complex coincide with the dimensions of 6 kV electrical cabinets.

The execution of the metal frame together with the transitional bus adapters as a single whole and the location on it of all power elements (including the switch) with their control devices greatly simplifies the process of installation, adjustment and maintenance of the KAD-6 elements, since access to these elements becomes significantly lighter and prevents the possibility of assembly errors during installation than if the metal frame and bus adapters were made separately and assembled by each element separately. The installation of bus adapters-transitions on a power switch mounted on a fixed metal frame as part of KAD-6 provides the required rigidity of this structure when it is inside electrical cabinets. The overall rigidity of the Adaptation Equipment Complex KAD-6 is ensured by the articulation of a rigid fixed frame, a power switch and a system of busbar transition adapters. The metal frame itself provides the required degree of rigidity and protection against vibration, as well as against accidental contact with live parts under voltage. The withdrawable switching module of the circuit breaker can be moved to service equipment, including power contacts, in any area of the electrical cabinet.

The essence of the invention is explained with the help of the illustrations shown in Fig. 1-2.

In FIG. Figure 1 shows the Adaptation Equipment Complex KAD-6 in the articulated assembled state of its metal structure with a rigid frame in the form of a frame, a set of flexible transition busbar adapters and a power switch, side and front view.

In FIG. Figure 2 shows the KAD-6 Adaptation Equipment Complex in assembled finished form, as well as a close-up of a set of flexible adapter bus adapters.

In these figures, the numbers indicate:

1. Metal structures with a rigid frame in the form of a frame.

2. Power switch.

3. The tire (tire adapter) is large.

4. Tire (tire adapter) medium.

5. Tire (tire adapter) small.

6. Voltage transformer.

7. Handle for rolling in.

8. Fragment of the fixed body of the cabinet.

9. Fixing elements of a set of flexible transition busbar adapters.

10. Frame fasteners.

11. Withdrawable switching module of the circuit breaker.

12. Fixed counterpart (basket) of the power switch.

The complex of adaptation equipment KAD-6 contains a metal structure with a rigid frame, consisting of a metal frame 1, on which a voltage transformer 6 and a power switch 2 are installed, in the upper part of which a set of flexible adapter bus adapters is installed, consisting of a large bus 3, a medium bus 4, small busbar 5. Power switch 2 includes a handle for rolling out 7, a withdrawable switching module of the power switch 11, a fixed counterpart (basket) 12. Power switch 2 is rigidly attached to the metal frame 1 using frame fasteners 10. The overall rigidity of the CAD- 6 is provided by the articulation of a rigid metal frame 1 and a fixed mating part of the power switch 12 and is sufficient to ensure electrodynamic and arc resistance in case of emergency operation inside them. A set of flexible transition busbar adapters is shown in close-up A, it consists of a large busbar 3, a medium busbar 4, a small busbar 5 and has the ability to adjust and by moving the busbars between themselves when articulated with fasteners of a set of flexible busbar adapters 9, this allows you to adjust the geometry of the connecting dimensions of KAD-6 to achieve coincidence with the internal dimensions of the fixed body of the electrical cabinet 8. In working condition, the fixed counterpart (basket) of the power switch 12 and frame 1 are rigidly articulated with each other using frame fasteners 10. The complex of adaptive equipment KAD-6 is equipped with all the necessary interlocks to ensure the safety of the work of the maintenance personnel and the regulated requirements of the relevant GOST and PUE.

To service the power elements of the circuit breaker, it is necessary to extend the guide supports (not shown in Fig. 1-2), roll out the retractable switching module of the circuit breaker 11 using the roll-out handle 7 outside the fixed mating part (basket) of the circuit breaker 12 and move it to a convenient for maintenance a place. At the same time, almost all elements of the switch are accessible for convenient maintenance due to their location on the retractable module 11. The virtual absence of power elements on the fixed counterpart (basket) of the power switch 11 reduces the requirements for its mechanical strength and makes its design simpler.

List of sources used

1. Patent of the Russian Federation No. 2492562 C1 dated 03/23/2012, MPKN02V 11/127, -- WITHDRAWABLE ELEMENT OF THE CABINET OF THE COMPLETE SWITCHGEAR.

2. Patent of the Russian Federation No. 2285319 C1 dated 05/20/2005, MPKN02V 11/00, - CABINET OF THE COMPLETE DISTRIBUTION DEVICE AND THE PULL-OUT ELEMENT OF THE CABINET OF THE COMPLETE DISTRIBUTION DEVICE.

3. RK "Tavrida Electric". Solutions for modernization. Technical information TER_CBdoc_PG_3 Version 2.7.

4. Catalog of ZAO GK Electroshield TM-Samara. Adaptation kits. Version 1.1.

Claims (1)

The complex of adaptive equipment KAD-6 for electrical cabinets 6 kV, containing a rigid frame in the form of a metal frame, a set of flexible transitional bus adapters, a power switch, a voltage transformer, fasteners, characterized in that the power switch includes a withdrawable switching module with a handle for of the circuit breaker and the fixed counterpart of the circuit breaker, the transformer and the circuit breaker are installed on a metal frame, while the fixed counterpart of the circuit breaker is rigidly attached to the metal frame using frame fasteners, a set of adapter busbar adapters is installed in the upper part of the circuit breaker, consisting of a large, medium and small busbars, made with the possibility of moving between themselves when joined by fasteners of a set of flexible transitional busbar adapters, ensuring that their connecting dimensions match the internal dimensions of 6 kV electrical cabinets.

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