RU34811U1 - Complete switchgear K-121 series - Google Patents

Description

complete distribution K-121 series

A utility model is a complete distribution device of the K-121 series (hereinafter referred to as K-121 device) relates to electrical engineering, to complete distributed distribution devices (KRU) for rated voltage up to 10 kV, rated current up to 3150 A, rated breaking current up to 50 kA. The device provides for the installation of vacuum, gas-insulated or low-oil switches on withdrawable elements.

It is intended for all types of power plants and substations of urban, rural, communal and other electric networks.

The K-121 device consists of separate switchgear switchgear cabinets, which are assembled at the facility in a switchgear section.

The purpose of creating a utility model is to increase the reliability and safety of cabinets as a result of using the new design and layout of the cabinet, which provides reliable power supply to the application, as well as changing the area of the building part due to one-sided servicing and ease of use with all elements of the electrical circuit.

Known switchgear series K-104M (K-104MS1) double-sided service for rated voltage up to 10 kV, rated current up to 1600 A, rated breaking current 40 kA with low-oil, vacuum or SF6 circuit breakers installed on the high-voltage element, meeting the requirements, also , as the proposed device K-121, GOST 14693-90 (1, 2).

This analogue in terms of features is a prototype.

The PC cabinet with the switch has a prefabricated-welded construction, including (in general) commutation and other equipment of the main electric circuit, upstream, grounding and interlocking

7H02B11 / 00

Device

devices detachable electrical contacts of the main circuit; arc protection of compartments from destruction by an open electric arc.

The cabinet is divided into compartments: a withdrawable element with a busbar breaker, linear, divided by partitions.

The relay cabinet contains switching devices, devices and other auxiliary equipment in accordance with the electrical circuit.

The roll-out element consists of a base assembly on wheels. In the compartment of prefabricated ttttts, which is separated from the linear by a blank horizontal sheet, the lower independent contacts are located with solders from the prefabricated 1 PIN, fixed to the support insulators.

The proposed utility model - the device K-121 has sugars differences and advantages from the analogue.

The line-up is applied, which allows switchgear to position the switchgear enclosures of the open-type switchgear of the unilateral service type. This ensures convenient connection of both three-phase power cables with a maximum cross-section of 4 (3x240) mm, and single-phase multi-ampere power cables with a cross-section of 500 mm, or with a PCB input on top of the pcb.

The housing of the pspsafa is divided into compartments: withdrawable element, prefabricated P1IN, linear, low-voltage equipment, each of which is a separate unit, while the compartment of the vpsatny element with the switch is located: in the middle of the compartment.

The roll-out element is rolled out to an invariant telecass. In the linear compartment, a ground disconnector is installed with a common ground for all three phases, grounding with a novice, which rises when turned on vertically and with a drive device displayed on the front panel of the compartment of the integrated element.

values greater than 0.2 s, thereby preserving the equipment and the device as a whole.

The proposed utility model is illustrated by the drawings shown in FIG. 1-4.

In FIG. Figure 1 shows the P1kaf switchgear for the outgoing line or input, which is a metal assembly kontrstspkdiya, which includes (in the general case) switching equipment of the main electric circuit, pggornye, grounding locking devices, detachable electric main parts of the main circuit, apparatus for auxiliary circuits, arc wiring of Pekaf 1СРУ.

In the housing are located: a compartment of the withdrawable element with a switch 1, a low-voltage apparatus 2, a compartment of prefabricated PPChs 20 with prefabricated pins 3, a linear compartment 19.

The switch unit 1 is located in the middle of the cabinet. It is possible to move the switch from the working position: to the control position and vice versa; it can be carried out without opening the front door, which ensures complete safety of the operator during servicing: living.

The detachable contacts of the main circuit are located in molded-through insulators 4, where the fixed contacts are fixed in the insulator and the movable contacts are sealed on the withdrawable circuit breaker. The lower unsupported contact of the main circuit of the switch is at the same time a measuring current transformer 6.

When the withdrawable element is extended with the switch 1 or another apparatus of the main circuit, the fixed contacts are automatically closed by the shutters 5.

The switch compartment has a discharge valve 16 at the top, and is closed by a door 14 from the facade.

Linear compartment 19 is designed for connecting as many as four cables 9 (see Fig. 1), and for connecting up to 12 single-phase multi-ampere cables 9 (Fig. 2).

On the terminals of the current transformers fixed independent contacts 7 of the grounding disconnector. The drive device of the earthing switch is connected to the front panel inside the switch compartment.

In the linear compartment, it is planned to place three cast measuring transformers 12 of cast design (ZNOL-06; NOL-08, OLS, etc.) and transformers 10 protected from ground faults.

If necessary, enter the exit point into the neighboring switchgear switchgear, these П1ИНИ 21 pass through the bushing installed on the partition of the linear compartment 19.

At the top, the linear compartment has an unloading valve 18, and is closed by the door 15 from the facade.

In FIG. 3 shows a switchgear cabinet with a pin input.

The compartment of prefabricated IPPC 20 has its own unloading valve 17, and the prefabricated PP1NY 3 can be prooyokali through bushing (Fig. 4).

The equipment compartment of auxiliary circuits 2 from the facade closes with door 13. The compartment contains equipment and devices for relay protection, control, signaling, measurement and blocking.

The use of K-121 devices provides increased reliability and safety of operation and allows them to be operated in areas with seismicity of up to 9 points per MSK-64, as well as in any climatic regions.

Bibdiographic data

1. Useful model No. 12294 “Complete distribution device of the K-104M (K-104MS1) series.

2. GOST 14693-90 “Complete distributive gel devices in a metal sheath for voltages up to 10 kV. General specifications.

Claims (4)

1. Complete switchgear device, consisting of separate switchgear cabinets containing a housing, which is a prefabricated design of separate compartments, including switching equipment of the main electric circuit, current and voltage transformers, auxiliary circuit equipment, arc protection of switchgear cabinets, characterized in that the cabinets Switchgear made lean type unilateral service. 2. The device according to claim 1, characterized in that the compartment of the withdrawable element with a switch is located in the middle of the cabinet. 3. The device according to claim 1, characterized in that the earthing switch is installed in the linear compartment with a common earthing knife for all three phases, which rises when turned on vertically and with a drive device displayed on the front panel of the withdrawable element compartment. 4. The device according to claim 1, characterized in that in each compartment of the cabinet there is an unloading valve for arc protection.