TMZH power oil transformer

Transformers of the TMZh type are power oil, step-down, three-phase, two-winding transformers with a capacity from 25 to 2500 kV·A, intended for powering electrical equipment of railways electrified on alternating current.

Specifications:

TMZH power transformers are produced with a nominal voltage of the primary winding (high voltage) of 27.5 kV and of the secondary winding (low voltage) – 0.4 kV. To adjust the voltage, the transformers are equipped with high-voltage switches that allow 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 structure of a conditional mark

TMJ — X/27.5 U(HL)1

T is a three-phase transformer,

M – oil cooling with natural air and oil circulation,

Ж – for powering electrical equipment of railways,

Х – rated power, kV·A, 27.5 – HV winding voltage class, kV,

У(ХЛ)1 – climatic performance and accommodation category according to DST 1515О-69;

Terms of use

Height above sea level - up to 1000 m. Ambient air temperature - from -45°C to +40°C. The relative humidity of the air is no more than 80% at 25°С.

Transformers are not calculated:

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

Construction of transformers:

Transformer tanks are welded, rectangular. Radiators are used to increase the cooling surface. Lifting of the tank and the transformer as a whole is carried out by hooks located under the upper frame of the tank. On the lid of the tank there is a plug for pouring oil, at the bottom of the tank there is a plug for taking a sample, a plug for draining oil, 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. The HV and LV inputs of the external installation are removable, the insulators are pass-through porcelain, located on the cover. At a current of 1000A 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 equipped with contact clamps of the appropriate cross-section.

The oil expander ensures the presence of oil in all modes of operation of the transformer and fluctuations in the ambient temperature. The oil indicator for controlling the oil level, fixed on the end of the oil expander, has three control marks: -45ОС, +15ОС, +4ОС, corresponding to the oil level in the non-working transformer at different temperatures. A thermometer is installed on the transformer cover to measure the temperature of the upper layers of oil.

They meet the standards IEC-60076, GOST R 52719-2007, TU U3.49-05758084-048-99, the 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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