Power transformer type TMG 10 to 2500 kV∙A

Power oil step-down three-phase two-winding hermetic general-purpose transformers with capacity from 10 to 2500 kV·A and voltage up to 35 kV are designed for the needs of the national economy for internal and external installation.

Specifications

Power transformers TMG-10 - 2500 are produced with a nominal voltage of the primary winding (high voltage) up to 35 kV, including the secondary winding (low voltage) - 0.4 kV. Scheme and group of connections - U/UN -0; D/UN -11.

Transformers are produced with different levels of no-load and short-circuit losses:

- level A according to TU U 31.1-00213440-024-2006 with reduced losses;

- level B according to TU U3.49-05758084-016-2000 with standard losses.

The voltage is regulated without excitation. For this purpose, the transformers are equipped with high-voltage switches, which are connected to the high-voltage winding and allow to adjust the voltage in stages when the transformer is disconnected from the network on the LV and HV sides with a range of ±2 x 2.5%.

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 conditional notation

TMG - X/10 U(HL)1 - X

T - three-phase transformer,

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

X - nominal power, kV·A, 10 - HV winding voltage class, kV,

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

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

TMG - X/35 U(HL)1 - X

T - three-phase transformer,

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

X - nominal power, kV·A, 35 - HV winding voltage class, kV,

У(ХЛ)1 - climatic performance and accommodation category according to GOST 15150-69; X is the level of no-load and short-circuit losses.

Terms of use

Height above sea level - up to 1,000 m.

Ambient air temperature:

- for a temperate climate - from -45 ОС to +4 ОС (execution "U");

- for a cold climate - from -60 ОС to +4 ОС ("HL" version). The relative humidity of the air is no more than 8% 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

Tanks of transformers TMG-10-2500 of rectangular shape are made with corrugated walls without an oil expander. Hooks located under the upper frame of the tank are used to lift the tank and transformer. 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 1OOO 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, LV inputs for a current of less than 1000 A and HV inputs can be supplemented 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.

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 TMG type, oil does not come into contact with air and does not oxidize. They do not require additional costs during commissioning.

Rollers are installed in transformers with a capacity from 160 to 2500 kVa, which serve for longitudinal and transverse movement of transformers.

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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