RU2451375C1 - Electric switchgear - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: electric switchgear is installed on a specialised vehicle and comprises a body 1 arranged with availability of two detachable panels: front one 2 and rear one 3. On the front panel 2 with the help of a bracket 4 there is a unit installed with circuit breakers of power circuits protection (Q1…Q8) 5, a voltage monitoring instrument 6, switching devices 7, a control - indication unit in the form of a set of light indicators 8, electrically connected with the first block of electric elements 9. On the rear panel 3 at the inner side on bushings 10 from a dielectric material in parallel to each other there are two flat buses installed, "+" 11 and "-" 12, between which on the bracket 13 there is a unit of contactors 14 installed. The flat bus "+" 11 is connected with contactors 14 by buses 15 of J-shaped form. At the outer side on the rear panel 3 there is a unit for supply of external devices 16 with the second block of electric elements 17, placed in the body with a developed heat-exchange surface 18. Mounting areas 19 and 20 for attachment of cables with appropriate fittings are installed on the opposite walls of the device body 1. Besides, on one of the walls there is the third and the fourth blocks of electric elements 21 and 22 installed.

EFFECT: improved reliability and simplification of operation.

5 dwg

Description

The invention relates to electrical engineering and can be used in ground-based mobile weapon systems, in particular in mobile topographic systems, as an electrical switchgear when connecting on-board and remote equipment.

Known complete DC switchgear for input, distribution of electricity and control (patent for utility model RU No. 94074, НВВ 11/02, 05/10/2010), adopted as a prototype. A complete DC switchgear for input, distribution of electric power and control comprises at least one cabinet (housing) including a functional equipment compartment, an instrument compartment, a cable connection compartment, a vertical busbar compartment, a bus trunk compartment. The functional equipment compartment is divided into blocks made according to the modular principle. Each block of the functional equipment compartment is separated from the other by a horizontal partition, the front side of which is fixed by screw connection to the vertical racks of the cabinet frame, and the trailing edge is installed in the gap between the mounting plates of the blocks of the functional equipment compartment, while the partition is rectangular in shape with side and front bent edges, and the side edges are bent up, the front down, in the front of each side edge there is a round hole, and on the basis of a burnout There is a group of rectangular holes in the back; in addition, there is a corner cutout in the corners of the rear part of the partition along the contour of which a series of rectangular holes are made, separated from each other by jumpers. A mimic diagram is made on the door of each block of the functional equipment compartment, while the mnemonic diagrams of the blocks form a single mnemonic diagram of the entire device. To the left of the functional equipment compartment is the instrument compartment, which is closed from the facade by a door and is separated from the functional equipment compartment by a vertically oriented duct, the duct being placed along the entire height of the DC switchgear and screwed to the frame. The mounting areas of the cable compartment are modular. The block of the functional equipment compartment and the mounting area of the cable connection compartment are located at the same level and occupy the same number of modules. The busbar compartment contains at least one bus system including a “+” bus and a “-" bus.

The disadvantages of the prototype are:

- high structural complexity of the electrical switchgear;

- the complexity of maintenance and operation, leading to the need to attract highly qualified personnel;

- a high probability of disruption of uninterruptible power supply due to the above factors;

- high cost of manufacturing and installation of the device;

- low resistance to vibration;

- lack of visual means of control and indication of electrical parameters.

The present invention solves the problem of improving the reliability of an electrical switchgear located on the basis of a specialized vehicle, while reducing its structural complexity.

The technical result obtained by the implementation of the invention is to create a reliable and easy-to-use electrical switchgear by optimizing layout solutions aimed at faultless power supply of equipment for various functional purposes located on a specialized vehicle, increasing resistance to vibration.

The specified technical result is achieved by the fact that in the proposed electrical switchgear comprising a housing in which functional equipment is located, divided into blocks, devices, mounting areas for connecting cables, the bus system “+” and “-”, the housing is new made with the presence of two removable panels, on the front panel with the help of the bracket there is a block of circuit breakers for power circuits, a voltage control device, switching devices, a control and indication unit in the form of a set of lights x indicators, electrically connected to the first block of electrical elements, on the back panel on the inner side on the bushings of dielectric material parallel to each other are installed two flat busbars "+" and "-", between which a contactor block is placed on the bracket, the flat bus "+" is connected with contactors ∫-shaped tires, on the outside on the rear panel there is a power supply unit for remote devices with a second block of electrical elements, located in a housing with a developed heat-exchange surface, mounting zones for connection I cables with corresponding fittings are located on opposite walls of the enclosure, in addition, one of the walls installed third and fourth electrical component blocks.

The implementation of the housing with two removable panels allows you to:

- to ensure the convenience of electrical and repair work;

- to ensure the optimal layout of the placed electrical apparatus.

Installation on the front panel with the bracket of a block of power circuit breakers, a voltage control device, switching devices, a control and indicating unit in the form of a set of light indicators allows:

- firstly, to provide visual information about the presence of voltage both in power circuits and directly on the lines of consumers of electric energy;

- secondly, to ensure the reliability of voltage control without significantly complicating the entire system as a whole;

- thirdly, to ensure the operation of electrical equipment without the involvement of highly qualified personnel;

- fourthly, to provide current protection of power circuits against overload and short circuit of all consumers of electricity.

Providing electrical communication of the control-indicating unit in the form of a set of light indicators with the first block of electrical elements allows for the regular functioning of the light indicators.

Installation on the rear panel from the inside on the bushings of dielectric material parallel to each other two flat busbars "+" and "-" allows you to:

- firstly, to ensure the isolation of tires "+" and "-" from the body;

- secondly, to ensure the convenience of supplying voltage to electrical devices.

Placing on the rear panel between the “+” and “-” buses on the bracket of the contactor block allows:

- firstly, to organize the supply of electrical energy from various sources of electrical energy: generator, battery, external source;

- secondly, to provide compact placement of power switching equipment.

Providing the connection of a flat bus "+" with contactors with ∫-shaped buses allows:

- firstly, to ensure minimal losses in the contact joints of the electric line;

- secondly, to provide a compact constructive placement of contactors;

- thirdly, to provide the necessary rigidity and resistance to vibration effects of the contactor block.

Installation from the outside on the rear panel of the power supply unit of external devices with a second block of electrical elements, located in a housing with a developed heat-exchange surface, allows you to:

- firstly, to provide power to remote equipment located on a specialized vehicle;

- secondly, to ensure reliable heat dissipation from power electrical elements.

Placement of mounting zones for connecting cables with appropriate fittings on opposite walls of the device case, in addition, installation on one of the walls of the third and fourth blocks of electrical elements allows you to:

- firstly, to ensure the convenience of supplying cable lines from various functional blocks of a specialized vehicle;

- secondly, to ensure the convenience of internal installation of an electrical switchgear;

- thirdly, place a relay block that provides disconnection of the generator and batteries when connecting an external power source.

Technical solutions with features distinguishing the claimed solution from the prototype are not known and do not follow explicitly from the prior art. This suggests that the claimed solution is new and has an inventive step.

The invention is illustrated by drawings, where figure 1 shows a General view of the device; figure 2 - view A, view of the power supply of remote devices; figure 3 is a view of B, a view of the third and fourth blocks of electrical elements; figure 4 is a General view of the front panel; figure 5 is a view of B, a side view of the front panel.

The electrical switchgear is located on a specialized vehicle and contains a housing 1 made with two removable panels: front 2 and rear 3. On the front panel 2, using the bracket 4, there is a block of circuit breakers for power circuits (Q1 ... Q8) 5, a voltage control device 6, switching devices 7, a control and indicating unit in the form of a set of indicator lights 8, electrically connected to the first block of electrical elements 9. On the rear panel 3 from the inside on the bushings 10 of dielectric material On the series, two flat buses “+” 11 and “-” 12 are installed parallel to each other, between which a contactor block 14 is located on the bracket 13. On the outside, on the rear panel 3, a power supply unit for remote devices 16 with a second block of electrical elements 17 is installed, located in a housing with a developed heat-exchange surface 18. Mounting zones 19 and 20 for connecting cables with the corresponding fittings are located on opposite walls of the housing 1 of the device. In addition, on one of the walls installed third and fourth blocks of electrical elements 21 and 22.

Electrical switchgear operates as follows. During operation of the electrical switchgear, electrical energy is distributed in accordance with transmission lines for specific instrumentation devices. All power electric lines are protected by a block of installed power circuit breakers (Q1 ... Q8) 5, which allows protection against unauthorized shutdown in specific electric power transmission lines. For the rational placement of electrical devices in an electrical switchgear, a functional placement method has been applied, which involves their freely oriented placement in the internal space of building 1. To organize the optimal mode of repair and maintenance work, the convenience of electrical work, building 1 is equipped with removable front 2 and rear 3 panels, dismantling which allows access to all assembly parts of the product. To organize the functioning of the electrical switchgear, all its functional devices: power circuit breakers block (Q1 ... Q8) 5, voltage control device 6, switching devices 7, control and switching unit 8, power supply unit for external devices 16 are connected to electric element blocks 9, 17, 21 and 22. The placement of tires “+” 11, “-” 12 and 15 allows you to organize a compact placement of the block of contactors 14 and to supply electric energy from various sources of electric energy: generator, battery battery, an external power source. The power supply unit of remote devices 16 with a second block of electrical elements 17, placed in a housing with a developed heat-exchange surface 18, provides regular power supply to external electrical equipment of a specialized vehicle. Mounting zones 19 and 20 for connecting cables with appropriate fittings, located on opposite walls of the housing 1 of the device, provide the convenience of connecting cable lines laid from various devices.

Thus, the proposed electrical switchgear solved the problem of achieving a technical result, which consists in creating a reliable and easy-to-use electrical switchgear by optimizing layout solutions aimed at fault-free power supply of equipment for various functional purposes located on a specialized vehicle, increasing vibration resistance impacts.

Claims (1)

An electrical switchgear comprising a housing in which functional equipment is placed, divided into blocks, devices, mounting areas for connecting cables, a bus system “+” and “-”, characterized in that the housing is made with two removable panels on the front panel with the help of the bracket, a block of power circuit breakers, a voltage control device, switching devices, a control and display unit in the form of a set of light indicators, electrically connected to the first block of electric elements s, on the rear panel, on the inside, on the bushings of dielectric material, two flat busbars “+” and “-” are installed parallel to each other, between which a contactor block is placed on the bracket, a flat bus “+” is connected to the contactors by ∫-shaped buses, from the outside on the rear panel there is a power supply unit for remote devices with a second block of electrical elements located in a housing with a developed heat-exchange surface, mounting areas for connecting cables with appropriate fittings are located on opposite x the walls of the housing of the device, in addition, on one of the walls of the installed third and fourth blocks of electrical elements.

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