Complete transformer substation KTP: manufacture, installation

Complete transformer substations are used in industrial plants and utility networks of settlements. The main advantage is the reliability and relative cheapness. KTP are in two and sometimes three times cheaper than conventional transformers. This equipment is made by special technology with strict observance of the standards prescribed by GOST. So if you need this station you can choose absolutely any line.

Types of KTP

At the place of installation of package transformer substation KTP are classified in fact and EPTS. The blocks of the first type are installed inside the premises. Such substations are typically used in the production. EPTS are often used in utility networks. The dimensions of the substation both types can have different. Under large installation arranged Foundation.

The Substation KTP may have a different power and purpose. On this basis, such equipment is divided into the following categories:

1. KTP with transformers with capacity from 25 to 400 kW. These stations are installed outside.

2. Package transformer substations for industrial enterprises. This variant is equipped with transformers, having a capacity of from 160 to 250 kW.

3. Teams of CTU.

4. CTU special purpose. Such designs can be used in mines, on construction sites, in quarries, etc., In their design includes such an element as the slide for movement.

According to the method of Assembly station of this type are divided into the mast, ground and fitted. The first kind is mounted on the vertical supports. The ground station can be collected in a metal, concrete or sandwich sections.

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Plants for the production of KTP

Manufacturer of KTP substations are manufactured at factories, which structure includes:

1. Metal-working Shop.

2. The Assembly plant.

3. Shop low and medium voltage. There is a section of bus-bar processing, wiring, testing and commissioning.

The Main design elements of KTP

Going to the substation KTP for production using the following basic elements:

• Input devices high voltage;

• Oil or dry power transformer;

• Distribution Cabinet to drain voltage.

The Enclosure of the substation, depending on the assignment and group performance, may be made of metal, concrete or sandwich blocks.

Modern transformer substation KTP: production

Manufacture of equipment of this type includes several basic steps. The most popular build of KTP in a steel housing starts in the metal shop. For their production we use the highest quality material. Body parts are usually manufactured on special machines by bending and punching. Thus obtained the workpiece is first treated with a special anti-corrosion compounds. Then they are painted. This is usually used by means of powder. These dyes are the most resistant to negative environmental factors.

Production of substations KTP continues in the Assembly shop. Here is a riveting all the blanks are joined in the finished building. Finally all the elements of the latter are assembled in the shop for medium and low voltage. Here at the site of bus-bar processing by special technology are made elements of the bus system. Further, the housing is installed with all necessary communication equipment. This operation is carried out at the site of installation. Then you build all the automatics and relay protection.

At the final stage ready station enters the commissioning section. Here it is checked for serviceability and conformity under the GOST standards.

Production stations in the concrete shell

Complete transformer substations KTP of this type are made for a different technology. In this case, the first stage uses a special molding installation. They are required to pour the concrete shell of the substation. In the manufacture of the latter is used in the framework, an appropriate design. Frozen concrete block with holes is processed by special means, which increases its resistance to adverse environmental factors. Cable floor the body gidroizolyatsiya.

The Electrical equipment inside the unit is installed in the same Department. It comes from the area of low and medium voltage. After mounting, as in the first case, tests and commissioning of equipment.

Installation of CTS

The Installation of stations of this type are usually carried out by experts of the same enterprise in which they were made. Area prior to installation, carefully prepared. Next is the marking under the base station-the base or sill. A small substation of KTP can be delivered to the installation site already assembled. Large equipment of this type is brought by part - blocks. Collect them already in place.

After raising start actually installing the station. Wardrobes lift using crane. In the absence of such equipment use of special rollers, made of thick steel tubes. For lifting of the switchgear inverter used slings attached to the ends of supporting channels.

After the CTU substation to be installed on the base, proceed with connecting the electrical equipment. This stage consists of such operations as joining the findings of the transformers to the SWITCHGEAR, an Assembly of overhead and cable lines, etc.

After completing the work compulsorily checked the reliability of all bolted connections, repair of mechanical locking devices and appliances. Also inspects insulation to detect possible damage.

Installation of package transformer substations KTP from several blocks

In this case the installation produces approximately the same methodology. However, when motage KTP, consisting of several main parts, among other things, should respect the order of Assembly of the blocks. The first set extreme. Next, assemble the blocks one by one. Before getting each of them to remove the plugs covering the exposed ends of the bus. After the installation of the blocks of the tyre of grounding system are welded to the support channels.

Features network connectivity

Power Scheme substation KTP may have a radial or trunk. In the first case, when you connect a block — the line — the transformer is allowed to use a blind connection to TM. If the power supply circuit of the main station, pre-set wardrobe of the IOC. With the power transformers in 1000-1200 kW for one line is usually attached 2-3 CTU. If this figure is less used 3-4 of the station.

Rules that must be followed

Be the installation of the substation KTP shall compliance with the following standards:

• Be Installed is at a height of not more than 1000 m above sea level.

• The Temperature of the ambient air should comply with the regulations stipulated for this particular model. This parameter is specified in the manual (usually -40 to +40 gr.).

• In the vicinity of the station, there should be no explosive or chemically active substances.

• The equipment Installed should not be exposed to shaking or vibration.

Operation properties

The Main equipment that requires periodic maintenance of the substation equipment is a switchgear and the power transformer. In the operation of a CTU must comply with the following standards:

• Load Current must not exceed the specified in the user parameters. In the station with two transformers, for example, it should not be above 80% of nominal.

• A periodic monitoring of the normal oil circulation through the filter. Validation is performed according to the degree of heating of the upper case.

• The Oxide film and slurry contact system should be removed at least once a year.

If the manufacture, installation and maintenance of the substation to comply with all specifications, it will be smooth and long. Otherwise, the management company or manufacturing enterprise must have a different kind of problem. So choose the manufacturer you should carefully KTP, focusing primarily on the reputation of companies offering such services.