TMZ power oil transformers (with protection)

TMZ power oil transformers are step-down three-phase two-winding, sealed transformers with oil protection, power from 630 to 2500 kV·A and voltage up to 10 kV, which are mainly intended for transformer substations of internal and external installation.

Specifications:

TMZ 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 conditional notation

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

T is a three-phase transformer,

M – oil cooling with natural air and oil circulation,

C – with protection using a nitrogen cushion,

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

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

Operating conditions:

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°C to +40°C ("HL" version). 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:

Transformer tanks are welded, rectangular. Radiators are used to increase the cooling surface. The tank and transformer are lifted by hooks located under the upper frame of the tank. In the lower part of the tank wall 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.

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. The inputs are located on the narrow walls of the tank. An oil indicator is installed on the wall of the oil nitrogen expander to control the oil level. There are three control marks on the oil indicator corresponding to the oil level in the non-working transformer at different temperatures:

–45°С, +15°С, +40°С - performance "U";

–60°С, +15°С, +40°С - execution of "HL", as well as a control mark corresponding to the oil level at the sealing temperature.

A nitrogen cushion protects the oil from oxidation and compensates for temperature fluctuations of the oil volume.

Thermometer sensors are installed to measure the temperature of the upper layers of oil.

A manovacuumometer is installed to control the internal pressure and signal about the maximum allowable pressure values.

For protection, a safety diaphragm or pressure switch is installed, which activates when a pressure of 0.75 atm is reached in the tank and gases escape.

They meet the standards IEC-60076, DSTU R 52719-2007, TU U3.49-05758084-016-2000, 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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