TMGF power oil transformer

Transformers of the TMGF type are power oil transformers, flanged, step-down, three-phase, two-winding and sealed. Power from 630 to 2500 kV·A and voltage up to 10 kV are intended for transformer substations of internal and external installation.

Specifications

TMGF power transformers are produced with a nominal voltage of the primary winding (high voltage) up to 10 kV, including the secondary winding (low voltage) - 0.4 or 0.69 kV. To adjust the voltage, the transformers are equipped with a high-voltage switch, which allows you to adjust the voltage in steps of 2.5% by ± 2 x 2.5% of the nominal value when the transformer is disconnected from the network on the LV and HV sides. The switch is connected to the high voltage winding. The maximum deviation of the technical parameters of the transformers are:

  - Short circuit voltage ±10%;

  - Short-circuit losses on the main branch +10%;

  - Idle losses +15%;

  - Full weight +10%.

The structure of the notation TMGF - Х/10 У(ХЛ)1 - Х:

T is a three-phase transformer,

M – oil cooling with natural air and oil circulation, G – sealed,

Ф – flange version

X – rated power, kV·A, 10 – voltage class of HV winding, kV,

У(ХЛ)1 – climatic performance and accommodation category according to DSTU 15150-69;

X is the level of no-load and short-circuit losses.

Terms of use

Height above sea level - up to 1000 m. Ambient air temperature:

  - for a temperate climate - from –45°С to +40°С (execution "U");

  - for cold climates - from –60°С to +40°С (execution "HL"). Relative air humidity is no more than 80% at +25°C.

Transformers are not designed to work:

- in an explosive and aggressive environment (which contains gases, vapors, dust of high concentration, etc.);

- with vibration and shaking.

Construction of transformers:

Rectangular transformer tanks are made with corrugated walls. Hooks located under the upper frame of the tank are used to lift the tank and the transformer assembly. On the lid of the tank there is a tap (plug) for adding oil, at the bottom of the tank there is a plug for draining oil, a tap (plug) for taking a sample, and a grounding bolt. The active part consists of windings, a high-voltage switch and a magnetic circuit, which is made of high-quality electrical steel. Steel is cut on the "GEORG" line, the charging of the magnetic conductor is carried out according to the "Step-Lap" scheme.

Transformer windings are aluminum or copper. Inputs HV and LV of the external installation, removable, through insulators are made of porcelain. At a current of 1000 A and above, a special contact clamp with a blade is attached to the upper part of the current-carrying rod, which ensures the connection of a flat busbar. At the request of the customer, HV inputs can be equipped with contact clamps of the appropriate cross-section. HV and LV inputs are located on the cover. To control the oil level, a float oil indicator is installed on the tank cover. A thermometer is installed on the transformer cover to measure the temperature of the upper layers of oil in the tank.

The volume expansion of the oil, which depends on the temperature of the transformer, is compensated by a change in the pressure inside the tank due to a change in the configuration and volume of the corrugated walls. In hermetic transformers of the TMGF type, the oil does not come into contact with air and does not oxidize. They do not require additional costs during commissioning and have no need for preventive repairs and revisions during the entire service life, and there is no need for oil analysis and regeneration. Rollers are installed in transformers, which serve for longitudinal and transverse movement of the transformer.

Meet the standards IEC-60076, GOST R 52719-2007, TU U3.49-05758084-016-2000, production is certified according to ISO 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.

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