RU2703215C1 - Complex of adaptation equipment kad-0.4 - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used for operation in electric power plants of three-phase alternating current with frequency of 50(60) Hz and rated voltage of 0.4 kV. Technical result is achieved by the fact that complex of adaptation equipment KAD-0.4 for electrical cabinets of 0.4 kV comprises rigid frame in form of metal frame, set of flexible adapter bus adapters, power switch with withdrawable switching module, handle for rolling in and fixed mating part, voltage transformer, fasteners. Transformer and power circuit breaker are installed on metal frame, at that fixed mating part of power switch is rigidly attached to metal frame by means of frame fasteners. In upper part of power circuit breaker there is a set of adapter bus adapters, consisting of large, medium and small buses, made with possibility of movement between each other at connection with fasteners of set of flexible adapter bus adapters with matching of their connecting sizes with internal dimensions of electric cabinets 0.4 kV.

EFFECT: simplified assembly, adjustment and maintenance of elements of electrical cabinets during modernization and replacement of switching equipment, including old power circuit breaker.

1 cl, 2 dwg

Description

The invention relates to the field of electrical engineering and can be used to work in electric power plants of three-phase alternating current with a frequency of 50 (60) Hz with a rated voltage of 0.4 kV, namely, to the design of elements of electrical cabinets used in modernization and reconstruction.

From the existing level of technology there are various solutions for the design of withdrawable elements of the cabinet of a complete switchgear / 1 /. The disadvantages of this technical solution are the large overall dimensions, and the fixed dimensions of the structure due primarily to the use of the same type of circuit breakers, 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.

Known adaptation kits with a power switch / 2 /, intended for use in existing electrical switchboards, containing metal structures, a frame, busbar elements, a power switch, voltage transformers, disconnectors and earthing switches, support insulators; moreover, the power vacuum switch, busbar elements and frame are supplied separately, and are installed at the installation site. To complete the installation of the adaptation kit for the power vacuum circuit breaker, it is necessary to have specially trained specialists and tools, as well as additional time for the assembly time 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 tires and a metal frame during operation with the equipment.

Closest to the proposed device is an adaptation kit for retrofit (modernization) of existing electrical switchboards / 3 /, containing a fixed metal structure, consisting of a power frame, power equipment (switch, voltage transformer), bus kit, switch (power or load switch), elements fasteners. In this case, the circuit breaker, voltage transformers, are mounted on the frame, and the busbar is measured, adjusted and adjusted to the mounting dimensions at the installation site.

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

The aim 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-0.4 (hereinafter KAD-0.4) consisting of a metal structure with a rigid frame in the form of a frame, a set of flexible adapter bus adapters, power equipment (circuit breaker, voltage transformer, chassis basket, handle for rolling in and roll-out of the switch), a set of fasteners, all elements are assembled together, and the metal structure and a set of flexible adapter bus adapters are installed and assembled together with the power equipment completely, and are ready for Installation and Electrical installation on site, requiring no additional assembly. The fixed counterpart of the circuit breaker is rigidly attached to the metal frame using the fasteners of the frame. In the upper part of the power switch, a set of transitional bus adapters is installed, consisting of large, medium and small tires, made with the possibility of moving between each other when connecting fasteners with a set of flexible transitional bus adapters, ensuring that their connecting dimensions coincide with the internal dimensions of 0.4 kV electrical cabinets and ensuring a single current path.

At the same time, with the help of flexible bus adapter adapters, it is possible to adjust the connection dimensions with respect to existing electrical cabinets. Due to this, the geometrically connecting dimensions of the KAD-0.4 Adaptation Equipment Complex coincide with the dimensions of 0.4 kV electrical cabinets.

The execution of the metal frame together with the transitional bus adapters as a whole and the location on it of all power elements (including the circuit breaker) with their control devices greatly simplifies the installation, adjustment and maintenance of KAD-0.4 elements, since access to these elements It becomes much easier and prevents the possibility of errors during assembly during installation than if the metal frame and bus adapter adapters were made separately, and assembled by each element separately. The installation of bus adapter adapters on a circuit breaker mounted on a fixed metal frame as part of KAD-0.4 provides the required rigidity of this design when it is inside electrical cabinets. The total rigidity of the Adaptation Equipment Complex KAD-0.4 is ensured by articulating a rigid fixed frame, a power switch and a bus adapter-transition system. The metal frame itself provides the required degree of rigidity and protection against vibration, as well as from accidental contact with live parts under voltage. The sliding switching module of the power switch can be moved to service equipment, including power contacts, in any area of the electrical cabinet.

The invention is illustrated using the illustrations shown in FIG. 1-2.

In FIG. 1 shows the Complex of adaptive equipment KAD-0.4 with the articulated assembled state of its metal structure with a rigid frame in the form of a frame, a set of flexible adapter bus adapters and a power switch, side and front views.

In FIG. Figure 2 shows the KAD-0.4 adaptation equipment complex in assembled finished form, as well as a close-up view of a set of flexible adapter bus adapters.

In these figures, the numbers denote:

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

2. Power switch.

3. The bus (bus adapter) is large.

4. The bus (bus adapter) is medium.

5. The bus (bus adapter) is small.

6. Voltage transformer.

7. Handle for rolling in.

8. Fragment of a fixed cabinet body.

9. Fasteners for the flexible adapter bus adapter kit.

10. Fasteners for the frame.

11. Withdrawable switching module of the circuit breaker.

12. The fixed reciprocal part (basket) of the power switch.

The complex of adaptive equipment KAD-0.4 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 consisting of a large 3 bus, an average 4 bus, small tires 5. Power switch 2 includes a handle for rolling out 7, withdrawable switching module of power switch 11, a fixed counterpart (basket) 12. Power switch 2 is rigidly attached to m the metallic frame 1 by means of fixing the frame members 10. The overall rigidity of KAD-0.4 is provided at the junction of the rigid metal frame 1 and the fixed mating circuit breaker 12 and is sufficient to provide arc stability and electrodynamic when an inside them emergency operation. A set of flexible adapter bus adapters is shown in closeup A, consists of a large 3 bus, an average 4 bus, a small 5 bus and has the ability to be adjusted by moving the tires together when articulating fasteners with a set of flexible adapter bus adapters 9, this allows you to adjust the geometry of the connecting dimensions KAD-0.4 to achieve a match with the internal dimensions of the stationary casing of the electrical cabinet 8. In working condition, the fixed counterpart (basket) of the power switch 12 and the frame 1 are rigidly interconnected using fasteners of the frame 10. The complex of adaptive equipment KAD-0.4 is equipped with all the necessary interlocks that ensure the safety of the staff, and regulated by the requirements of 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 switching-out switching module of the circuit breaker 11 using the handle 7 to move outside the fixed counterpart (basket) of the circuit breaker 12 and move it to a convenient for maintenance a place. At the same time, almost all circuit breaker elements are accessible for convenient maintenance due to their location on the withdrawable switching module of the circuit breaker 11. The practical absence of power elements on the fixed counterpart (basket) of the circuit breaker 12 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 March 23, 2012, IPC Н02В 11/127, OUTDOOR ELEMENT OF A COMPLETE DISTRIBUTION DEVICE CABINET

2. RK "Tavrida Electric." Modernization solutions. Technical Information TER_CBdoc_PG_3 Version 2.7.

3. Catalog of the company ZAO GC "Electroshield TM-Samara". Adaptation Kits. Version 1.1.

Claims (1)

The complex of adaptation equipment KAD-0.4 for electrical cabinets of 0.4 kV, containing a rigid frame in the form of a metal frame, a set of flexible adapter bus adapters, a power switch, a voltage transformer, fasteners, characterized in that the power switch includes a withdrawable switching module with with a handle for driving in and a fixed response part of the power switch, a transformer and a power switch are mounted on a metal frame, while the fixed response part of the power switch the fir-tree is rigidly attached to the metal frame with the help of the fastening elements of the frame, at the top of the circuit breaker a set of adapter bus adapters is installed, consisting of large, medium and small tires, made with the possibility of moving between each other when connecting fasteners with a set of flexible adapter bus adapters to ensure consistency their connecting dimensions with the internal dimensions of electrical cabinets of 0.4 kV.

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