RU12294U1 - DEVICE COMPLETE DISTRIBUTION SERIES K-104M (K-104 MS1) - Google Patents

Description

The utility model relates to electrical engineering, to complete switchgears (KRU) with withdrawable elements of bilateral service for rated voltage up to 10 kV, rated current up to 1600 A, rated breaking current 40 kA, designed for all types of power plants and power substations of power systems / including for industrial facilities and nuclear energy.

Switchgear consists of one or is dialed from several cabinets, according to the customer's request.

The purpose of creating a utility model is to increase the reliability and safety of switchgear cabinets as a result of a design modification that provides reliable power supply to the application.

Known switchgear K-104 series for voltages up to 10 kV, rated current up to 1600 A, tripping current 31.5 kA with low oil or vacuum circuit breakers installed on the withdrawable element (1).

The cabinet body with a switch has a prefabricated welded construction and is assembled from pre-welded flat frames: base, vertical, side, front and upper rear.

The casing with metal partitions is divided into three compartments: a withdrawable element, busbars and a linear one.

The switchgear cabinet with a bus input switch consists of three blocks: a housing, a withdrawable element and a relay cabinet. The cable entry cabinet additionally has a busbar for cable entry

at the bottom. The draw-out compartment is separated from the busbar compartment and the linear blank partition of the vertical frame. In this partition in the bushings, fixed pin detachable contacts of the main circuits are mounted.

The busbar compartment is separated from the linear by a blank partition. In the compartment, on the supporting insulators, busbars are arranged in a triangle.

The linear compartment contains: current transformers / earthing switch, limit switch for the discharge valve of the withdrawable element compartment, end switch of the earthing switch, fixed (linear) contacts of the main circuit, input bus and, depending on the electrical circuits of the main circuits, solder buses to adjacent cabinets from input bus.

In the compartment of the withdrawable element there are: a curtain mechanism with a drive device / drive device of the grounding disconnector, auxiliary circuit wires protected by a metal hose and metal casings.

In the upper part of the compartment there are two fixed blocks of the plug connector for communication of auxiliary circuits, an exhaust channel with an unloading valve between the rear wall of the relay cabinet and the partition of the linear compartment.

To protect the busbar compartment from electric arc short circuit at the ends of the switchgear cabinets, arc catchers are installed, which are metal structures with tires fixed inside, which are a continuation of the section busbars.

On top of the arrester are discharge valves with limit switches / connected to the trip circuit of the input switch.

The proposed utility model - The complete distribution device of the K-104M (K-104MS1) series has significant differences and advantages from the analogue.

The design of the withdrawable element compartment, in addition to the use of a low-oil or vacuum circuit breaker, provides for the installation of an SF6 circuit breaker.

Enhanced modification of inputs. In addition to the bus entry and the cable entry from below, the cable entry from above is carried out using the cable block / which is installed on the linear compartment of the switchgear cabinet. The cable block allows you to install four cables with a cross section of 3 x 240 mm each.

A complete electronic device (KEU) / microprocessor device SPAC or BMRZ of relay protection and automation / / or any device of foreign companies (Siemens, Alstom, Merlen Yeren, etc.) is installed in the relay cabinet.

To protect the busbar compartment from electric arc short circuits, they can be used in addition to arcing catchers:

a) photosensors / which are installed every two on the third switchgear cabinet. Photosensors in combination with protection circuits limit the duration of an open electric arc inside the cabinet to 0/2 s;

b) in the compartment of the busbars an additional one is laid - the fourth arc trap bus (antenna). When an electric arc occurs, the signal / appearing on the antenna / moves to the arc protection current transformer / installed in the rightmost cabinet / and through the current relay enters the input switch.

(in general) switching equipment, curtains, grounding and blocking devices (live parts), fixed electrical contacts of the main circuit, arc protection of compartments from destruction by an open electric arc.

The housing contains: a compartment for a vykat element 1 with a switch 2 and a front door b, a relay cabinet 3, a linear compartment 4, a compartment for busbars 5.

The switchgear cabinet body is installed on mortgage bases of channels 7, which fit into the building structures of the switchgear.

Figure 2 shows the cable entry from above made using a cable block 8, which is installed on the linear compartment 4 of the switchgear cabinet.

The use of complete switchgears of the K-104M (K-104MS1) series provides increased reliability and safety of operation and allows them to be operated in areas with seismicity up to 9 points on the MSK-64 (K-104MS1) scale, as well as in areas with a tropical climate.

The enterprise at the switchgear of the K-104M (K-104MS1) series was issued a certificate of conformity No. ROSS RU.MB02.H.00279, valid until March 23, 2004

Claims (5)

1. Complete switchgear series K-104M (K-104 MS1), consisting of separate switchgear cabinets containing a housing divided into compartments: withdrawable element with low oil or vacuum circuit breakers, linear, busbars, separated by partitions, relay cabinet, switching devices and other equipment, instruments and apparatus for measuring, automation and protection, as well as controls, alarms and other auxiliary devices, interconnected in accordance with the electrical circuit, with arc protection, designed to protection of compartments of switchgear cabinets from destruction by an open electric arc, characterized in that an SF6 circuit breaker is installed in the compartment of the withdrawable element.  2. The device according to claim 1, characterized in that the cable entry is made from above and is carried out using a cable block mounted on a linear compartment.  3. The device according to claim 1, characterized in that the relay cabinet has a complete electronic device, a PAC microprocessor device, or BMRZ relay protection and automation, or similar devices of foreign companies.  4. The device according to claim 1, characterized in that every two photosensors are installed on the third cabinet, which in combination with protection circuits limit the duration of the open electric arc inside the cabinet to 0.2 s. 5. The device according to claim 1, characterized in that a fourth arcing bus is installed in the busbar compartment - an antenna connected to an arc protection current transformer, a current relay and an input switch.