RU168299U1 - CAMERA COMBINED ONE-SIDED SERVICE - Google Patents

Abstract

The utility model relates to the field of electrical engineering, namely to high-voltage complete distribution devices (switchgear), designed to receive and distribute electrical energy of three-phase alternating current. Single-chamber prefabricated chambers (KSO chambers) with a voltage of 6 and 10 kV belong to the field of electrical engineering and are intended for 50 Hz alternating three-phase switchgears of systems with an isolated neutral or grounded through an arcing reactor. The solution of these problems was achieved in a one-way service precast chamber containing a housing in the form of a parallelepiped having a front and rear wall to which busbars are connected, a low-voltage compartment with an upper housing door and a high-voltage at least one switching device with an earthing switch, main circuit equipment, protection, metering and control devices and interlock systems, as well as auxiliary circuit equipment installed in the low-voltage compartment, that on the front wall on both sides of the lower door there are two front panels: right and left, two disconnectors and an earthing switch are installed in the high-voltage compartment, the disconnectors are installed in a vertical plane bone above the lower upper, disconnectors are connected to the busbars, wherein the lower terminals of the upper switching device connected with the upper contacts of the switching device of the lower webs, and the busbar conductors are connected to these modular peremychkami.V chamber unilateral service can be applied

Description

The utility model relates to the field of electrical engineering, namely to high-voltage complete distribution devices (switchgear), designed to receive and distribute electrical energy of three-phase alternating current. One-way service prefabricated chambers (KSO chambers) with a voltage of 6 and 10 kV belong to the field of electrical engineering and are intended for three-phase alternating current switchgears with a frequency of 50 Hz of systems with isolated neutral or grounded by known methods.

KSO-395 series cameras are known from the existing level of technology (MEL OJSC, the operating manual is published on the website http://www.zavodmel.rn/download/0/RE-KCO-395.pdf), in which the main switching devices are applied:

A. Auto-gas circuit breakers, type VNAP, manufactured by MEL OJSC or similar from other manufacturers;

B. Vacuum switch-disconnectors type VNVR-10 “VOLNA”, manufactured by OJSC “Argon” (Saratov Region) http://oao-argon.ru/:

B. Vacuum circuit breaker BB / TEL-10-20, manufactured by Tavrida Electric CJSC, Moscow http: //www.tavrida.rn.

The disadvantages of the KSO-395 camera are the use of these switching devices and the associated layout and structural solutions, namely:

1. As part of the load switch, a vacuum arcing chamber is used, which only breaks the arc when the load is disconnected, its operation is associated with the operation of the disconnector knives, which affects the reliability of the switching device as a whole.

2. Insulation (insulating partitions, rods) is made of fiberglass-material, the use of which the consumer is negative, because its high hygroscopicity often leads to electrical breakdown on the surface.

3. Fuses are installed separately from the load switch, which significantly increases the space occupied by the main devices in the KSO-395 chamber.

4. Two drives are required to control the main and ground knives of the load switch. As a result of this, in order to exclude incorrect operations (including grounding knives with the main ones turned on and vice versa), an additional locking mechanism is required.

5. The vacuum circuit breaker used in KSO-395 has an electromagnetic drive, the disadvantage of which is the inability to manually turn on in the absence of operating voltage. Since the KSO-395 series cameras are used on small TPs, RTPs, where provided operational power is not provided, this drawback is significant.

6. The load and break switches used in KSO-395 of different manufacturers have a fundamentally different design, which entails additional difficulties for the consumer during their maintenance and operation.

7. When using the BB / TEL switch, it is mandatory to install an additional disconnector to ensure a visible gap (the requirement of regulatory documents).

8. The presence of separately installed circuit breaker and disconnector entails the installation of an additional blocking system between them during assembly of the KSO-395 camera (prohibition of operating the disconnector with the switch on, prohibition of turning on the switch when the disconnector is in the intermediate position).

Known switchgear according to the patent of the Russian Federation for utility model No. 114563, IPC publ. 03/24/2012 g, prototype.

This complete switchgear comprises a box in the form of a parallelepiped having a front and rear wall, to which busbars are connected, a low-voltage compartment with an upper housing door and a high-voltage compartment with a lower door, separated by a partition, installed in the high-voltage compartment, at least one switching device with an earthing switch, main circuit equipment, protection, metering and control devices and interlock systems, as well as auxiliary circuit equipment installed in the low-voltage compartment.

Disadvantages: a relatively low level of safety when working with devices under high voltage, large dimensions and metal consumption with limited functionality (the presence of one energy consumer).

The technical result, the achievement of which this technical solution is aimed, is to ensure the safety of staff when working with high voltage, improve the technical characteristics of the camera, the optimal location of structural elements, ensuring ease of use.

The solution to these problems has been achieved in the chamber of a one-way prefabricated team containing a box in the form of a parallelepiped having a front and rear wall, to which busbars are connected, a low-voltage compartment with an upper housing door and a high-voltage compartment with a lower door, separated by a partition installed in the high-voltage compartment, by at least one switching device with an earthing switch, main circuit equipment, protection, metering and control devices and interlock systems, as well as auxiliary circuit equipment, Indicated in the low-voltage compartment, in that there are two front panels, right and left, on the front wall on both sides of the lower door, two disconnectors and an earthing switch are installed in the high-voltage compartment, the disconnectors are installed in the vertical plane upper above the lower, busbars are connected to the disconnectors, the lower contacts of the upper switching apparatus are connected to the upper contacts of the lower switching apparatus by jumpers, and the busbars of the busbars are connected to these jumpers.

In the chamber of a one-sided service team, interlocks can be applied that do not allow the earthing switch to be switched on with the operating knives of the switching device turned on, a lock that does not allow the switching device to be switched on with the earthing switch turned on, and a lock that does not allow the high-voltage compartment door to open when the switching device is turned on. All locks can be made mechanical, of the same design and contain each mechanical traction connected on the one hand through a hinge to the door of the high-voltage compartment, and on the other, with the contact groups of the disconnector and earthing switch. Switching devices and disconnectors are made with the possibility of manual control without opening the door of the high-voltage compartment. To provide manual control of the disconnectors on the left front panel, two holes are made. To provide manual control of grounding conductors, two holes are made on the right front panel. Inspection windows can be made on the lower door. Protection, metering and control devices can be placed on the upper door. The lower door is equipped with locks. Locks can be made with the possibility of their blocking when switched on switching devices.

The proposed technical solution is illustrated by drawings of FIG. 1 ... 7, where

- in FIG. 1 appearance of the camera team one-way service.

- in FIG. 2 is a rear view,

- in FIG. 3 shows the drawings of the camera team unilateral service,

- in FIG. 4 shows a linear-sectional KSO camera, linear with cable connection to both switching devices,

- in FIG. 5 shows a linear KSO camera with cable connection to both switching devices,

FIG. 6 shows a linear KSO camera with lower cable and upper air connections,

- figure 7 shows the design of the locking devices.

In FIG. 1 illustrates the appearance of a one-way service precast camera.

The camera assembly one-way service (Fig. 1) contains a housing 1 made in the form of a rectangular parallelepiped. Inside the housing 1 there are two compartments: low-voltage 2 and high-voltage 3, separated by a continuous metal partition 4. The housing 1 has a front wall 5 and a rear wall 6. On the side of the front wall 5, the housing 1 has an upper door 7 for a low-voltage compartment 2 and a lower door 8 for high-voltage compartment 3. Protection devices 9, metering devices 10 and control devices 11 are installed on the upper door 7. The lower door 8 is narrower than the front wall 5 and the left and right panels 12 and 13 are respectively made on both sides of the lower door 8. doors 8 you olneny observation window 14. Specifically proposed to apply three viewing windows 14 disposed vertically along the symmetry axis of the lower door 8. This will provide an overview of virtually all high-voltage chamber 3.

A busbar 15, containing electrical wires 16 for supplying high voltage, is brought to the housing 1.

In the high-voltage compartment 3 on the rear wall 6 there are two switching devices upper 17 and lower 18 (Fig. 2 and 3). The busbar 15 is connected between the switching devices 17 and 18 at the rear, while the lower contacts 19 of the upper switching device 17 and the upper contacts 20 of the lower switching device 18 are connected by jumpers 21, and electric wires 16 of the busbar 15 are connected to them. Inside the high-voltage compartment 3 two earthing switches 22 and 23 are also installed (Fig. 3).

For manual control of switching devices 17 and 18 on the front panel 12 of the KSO camera, holes 24 are made for installing a removable handle for operating knives (a removable handle and knives in Figs. 1 ... 7 are not shown). Holes 24 and 25 are made for manual control of grounding conductors 22 and 23. Holes 26 are made to block switching devices 17 and 18. Holes 27 are made to block grounding conductors 22 and 23.

The housing 1 is made of galvanized sheet bent profiles, interconnected by means of blind rivets (not shown).

Inside the high-voltage chamber 3, control drives 28 and 29 (Fig. 3) are installed to control the switching devices 17 and 18 and ground electrodes 22 and 23. Also there are lock actuators 30 and 31 for locking the switching apparatus 17 and 18 and ground electrodes 22 and 23.

In the chamber of the one-sided service team, locks that prevent the inclusion of ground electrodes 22 and 23 when the switching devices 17 and 18 are turned on, a lock that does not allow the inclusion of switching devices 17 and 18 when the ground electrodes 22 and 23 are turned on and a lock that prevents the lower door 8 of the high-voltage compartment from being opened can be applied 3 with switched on devices 17 and 18.

All locks can be made mechanical, of the same design and contain each mechanical rod 32 connected on one side via a hinge 33 to the lower door 8 of the high-voltage compartment 3, and on the other, with contact groups 34 (Fig. 7) of the switching devices 17 and 18 and contact groups 35 of the ground electrodes 22 and 23. To the contact groups 34 are the main circuits 36 of the KSO chamber, and the ground wires 37 connected to the ground 38 are connected to the contact groups 35.

The lower door 8 comprises locks 39. The locks 39 may be lockable. In this case, the lock of the lock 39 can be both mechanical and electrical. In FIG. 7 shows an example of an electrical locking of a lock (s) 39.

The lock 39 contains a housing 40, a deadbolt 41 and a socket 42. A blocking control unit 43 is mounted on the housing 40, to which a low voltage wire 44 is connected.

The equipment of the auxiliary circuits 45 is located in the low-voltage compartment 2 and is mounted on the rear wall 6 (Fig. 1).

On the housing 1 in the lower part there is an earth clamp 46, intended for connection to the grounded housing 1 of the elements temporarily to be grounded. The upper door 7, on which the auxiliary circuit equipment 45 is installed, is grounded by a flexible wire 47 (Figs. 1 and 2).

On the right panel 13 there is a device 48 for installing an internal lighting lamp 49 (36 V incandescent lamp), which makes it possible to safely replace a burned-out internal lighting lamp 49 without removing the voltage and controlling the lighting 50.

The busbars 15 of the KSO chamber have solid barriers from the facade and from above (not shown in FIGS. 1 ... 7). The material of all the walls of the housing 1 and doors 7 and 8 is sheet steel, painted outside and inside with powder dye.

Case 1 consists of prefabricated elements: sidewalls and internal partitions, connecting elements, compartment doors. Elements are assembled through rivet joints.

The CSR camera assignment options: linear-sectional (Fig. 4), linear with cable connection to both switching devices (Fig. 5) and linear with lower cable and upper air connections (Fig. 6).

CAMERA OPERATION

The camera is a one-way service team as follows: switching devices 17 and 18 automatically or by means of a manual drive (in Fig. 1 ... 7 the manual drive is not shown) includes the main power supply circuit with high voltage consumers in the camera.

The earthing switches 22 and 23 and the interlock drive 28 and 29 are used to ensure safety during work in the chamber of the prefabricated one-way service.

The control drives 28 and 29 have mechanical traction 30, which will not allow to open the lower door 8, if the high-voltage equipment is energized.

Manual control of switching devices 17 and 18 of the KSO camera is carried out through openings 24. Manual control of grounding conductors 22 and 23 is performed through openings 24 and 25. Locking of switching devices 17 and 18 is performed through openings 26. Locking of grounding conductors 22 and 23 is performed through openings 27 (Fig. 1 and 3).

Windows 14 allow you to monitor the status of high-voltage equipment without opening the bottom door 7.

Application of the utility model allowed:

1. To increase the level of safety of staff through the use of several types of interlocks eliminating the impact on personnel of high voltage.

2. To simplify the design of the complete switchgear while increasing its functionality: providing power to the high voltage current of two consumers.

Reduce the size of the device and its metal consumption. This is achieved due to the fact that two disconnectors and an earthing switch are installed in the high-voltage compartment, the disconnectors are installed in the vertical plane upper above the lower, busbars are connected to the disconnectors, while the lower contacts of the upper switching device are connected to the upper contacts of the lower switching device by jumpers, and the wires busbars are connected to these jumpers.

3. Improve access to electrical units by placing part of the units on the upper door and arranging switching devices on top of each other.

Claims (12)

1. The camera is a one-way service assembly comprising a box in the form of a parallelepiped having a front and rear wall, to which busbars are connected, a low-voltage compartment with an upper door of the housing and a high-voltage compartment with a lower door, separated by a partition, installed in the high-voltage compartment, at least one switching device with an earthing switch, main circuit equipment, protection, metering and control devices and interlock systems, as well as auxiliary circuit equipment installed in the low-voltage compartment, from characterized by the fact that on the front wall on both sides of the door of the high-voltage compartment there are two front panels: right and left, two disconnectors and an earthing switch are installed in the high-voltage compartment, the disconnectors are installed in the vertical plane upper above the lower, busbars are connected to the disconnectors, while the lower contacts of the upper switching apparatus are connected to the upper contacts of the lower switching apparatus by jumpers, and the busbars of the busbars are connected to these jumpers. 2. The camera team unilateral service according to claim 1, characterized in that it uses locks that do not allow the inclusion of an earthing switch when the operating knives of the switching device are turned on, a lock that does not allow the switching of the switching device when the earthing switch is turned on, and a lock that does not allow the door of the high-voltage compartment to open when the switching device is turned on. 3. The camera team unilateral service according to claim 1, characterized in that all locks are made of mechanical, of the same design and contain each mechanical traction connected on one side through a hinge to the door of the high-voltage compartment, and on the other, with the contact groups of the disconnector and ground electrode. 4. The camera one-way service team according to claim 1, characterized in that the switching devices and disconnectors are made with the possibility of manual control without opening the door of the high-voltage compartment. 5. The camera is a one-way service team according to claim 3, characterized in that two holes are made on the left front panel to ensure manual control of the disconnectors. 6. The camera is a one-way service team according to claim 3, characterized in that two holes are made on the right front panel to ensure manual control of the earthing switches. 7. The camera is a one-way service team according to claim 1, characterized in that the observation windows are made on the lower door. 8. The camera is a one-way service team according to claim 1, characterized in that the protection, metering and control devices are located on the upper door. 9. The camera is a one-way service team according to claim 1, characterized in that the lower door is equipped with locks. 10. The camera is a one-way service team according to claim 1, characterized in that the Locks are made with the possibility of their locking when the switching devices are on.

Images