Power transformers dry TSHL 20 kV

Transformers are three-phase dry power transformers of the TSHL series with cast insulation of the "GEAFOL" type, heat resistance class "F" (155 °С), two-winding, general purpose power from 630 to 2500 kV•A with a voltage of 20 kV. The transformers are completed with SIEMENS windings. They are used in various sectors of the national economy and industry, designed for the conversion of electrical energy in three-phase alternating current electrical networks with a frequency of 50 Hz. They are installed in industrial premises and public buildings, which are subject to increased requirements in terms of fire safety, explosion protection, and environmental cleanliness.

The structure of the conventional designation TSHL-X / 20 U3
T - three-phase transformer;
C- natural air cooling;
GL - windings with molded insulation of the "GEAFOL" type;
X - nominal power, kVA;
UZ - climatic performance and accommodation category according to DSTU 15150-69.

Specifications:

TSHL-type power transformers with capacity from 630 to 2500 kVA with nominal voltages of 20 kV and 0.4 kV. Basic schemes and groups of connection of windings (HV/LV) - D/un-11, U/un-0. Voltage regulation ±2x2.5%, steps of 2.5% from the nominal voltage, switching without excitation (PBZ) using jumpers.

Terms of use

- ambient temperature: from -25 °C to +40 °C;

- relative air humidity - no more than 80% at a temperature of +25 °C;

- installation height above sea level - up to 1000 m;

- environment - non-explosive, not containing conductive dust;

- for seismic impact - up to 9 points on the MSK-64 scale;

- according to the class of resistance to environmental influences: E2;

- according to the class of climatic conditions: C2;

- according to fire hazard class: F1.

Construction of transformers

Transformers consist of the following basic assembly units:

- magnetic circuit;

- windings placed on the magnetic circuit;

- taps, inlets, LV and HV buses;

The magnet wire is made of high-quality electrical steel. Special slotting on the "GEORG" line and charging of the magnetic conductor according to the "Step-Lap" scheme. Assembly of the magnetic circuit is carried out with the use of bandages, fastening pins and special glues that ensure low idle losses and noise level. To protect against corrosion, silicon-organic paints are used.

LV and HV windings are made of aluminum or copper tape. In these transformers, winding insulation of the GEOFOL type is used, which consists of a compound of epoxy resin and quartz filler poured under vacuum. Modern technology of filling under vacuum and baking in electric ovens according to a temperature program guarantees high quality of windings and resistance to short-circuit currents.

Transformers are manufactured with the degree of protection of IROO. At the request of the customer, the manufacturing plant develops and manufactures transformers of individual design or with parameters that differ from the standard ones.

Overload capacity of transformers

Overload is limited only by overheating of the windings. The maximum temperature exceedance of 100°C for insulation class "F" is achieved under the following conditions: ambient temperature of 40°C and operation of the transformer for a long time at nominal load. If the ambient temperature is below 40 °C, and the previous load is less than 100% of the nominal, then the winding temperatures will be below the permissible maximum. This temperature difference can be used for short-term overloading of the transformer. The duration of a possible overload is shown in the following graphs as a function of the previous load and the magnitude of the overload.

Exceeding the permissible temperature causes an alarm signal by the temperature control system, or a signal to disconnect the transformer if the transformer is overloaded for longer than the permissible time.

Delivery completeness

The delivery set includes: a transformer, thermal relay TR-100 with temperature sensors Pt1ОО, movable rollers (rollers), technical documentation (passport, technical description of the condition and instructions for storage, installation and operation). At the request of the customer, it is possible to equip the transformer with vibration supports and flexible connections.

Meet the standards MEK-76, DSTU 3076-95 (GOST 30297-95), TU U3.49-00213440-059-2002, production is certified according to 150 9001: 2008

We deliver orders throughout Ukraine, except temporarily occupied territories and war zones. Delivery is carried out by transport and logistics companies chosen by you.

The terms of delivery of the order depend on the availability of goods in the warehouse. If at the time of placing the order, all the selected goods are available, then we will deliver the order within a few days, depending on the remoteness of your region. If the ordered product is not in stock, the maximum delivery time of the order may be several weeks. But we try to deliver orders to customers as quickly as possible, and 90% of customer orders are shipped within the first almost immediately. In the event that part of the goods from your order did not arrive at the warehouse after the specified period during the discussion with the manager, we will definitely inform you about it.

Payment methods:

• Payment upon receipt
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• Non-cash settlement