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Converter transformers are special power transformers that are used to change the value of the mains voltage and match it with the input voltage of the converter. With the help of a converter transformer, the DC network is isolated from the AC network, the number of phases of the valve windings is increased to reduce the ripple of the rectified current, and the shape of the network current is improved. Each converter transformer is a unique development, as it is produced according to the specific requirements of the Customer, taking into account the provided overload schedule, the composition of harmonics and the parameters of the converter.
A harmonic filter reactor is used to reduce or block higher harmonics and pulsating signals in an AC network, both coming from the network and leaving to the consumer, as part of reactive power compensation devices. Reactors are manufactured for voltage classes up to 110 kV. Produced by single phase, 3 single phase units form a three phase group. The design of the reactor may have taps for regulating the inductance. Air-core filter reactors are resistant to short-circuit currents that exceed the rated value.
An air-core three-phase line reactor (choke) is used for operation in converter plants. The reactor protects the network from higher harmonics, provides an increase in power factor, protection from current surges during transients in the supply network and load, reduction of short-circuit current in the converter load circuit, and limiting switching overvoltages of the power supply circuit.
The shunt reactor is designed to operate in power systems for voltages up to 330 kV to compensate for reactive power. An air core shunt reactor is connected directly to the power line (phase to ground, phase to neutral, phase to phase) or to the tertiary winding of a transformer in order to remove the undesirable effect of the capacitive component of energy. The design of the reactor may include switching without excitation in order to improve the regulation of the reactive power consumed depending on the seasonal and daily fluctuations of the load.
Current-balancing reactor is used to equalize the current between the two groups of valves in rectifier circuits. For example, in the scheme two reverse stars. The design of the reactor consists of two inductors. The coils are connected in opposite directions, in which case the opposite magnetic flux extinguishes each other and prevents magnetic reversal when the operating current flows.
Filter reactors are designed to protect reactive power compensation equipment from overloads caused by excessive harmonics in voltage distribution systems. They are used as part of filter compensating installations (FKU) to remove unwanted harmonics from power systems. Reactors are designed to meet specific requirements based on harmonic levels, operating conditions and environmental conditions. All parameters of ELTIZ equipment are calculated according to the customer's requirements. It is possible to manufacture equipment with a change in design, the use of various types of windings.
Damping reactor - a reactor connected in series with shunt capacitors to limit the inrush current when the capacitor is turned on, limit the shutdown current in case of close faults or adjacent switching capacitors and / or separate the capacitor banks to avoid resonance with the power system.
The dry three-phase motor reactor (choke) is used for operation in converter plants. The reactor is connected in series with the engine and limits its starting current. Provides continuous smoothing of the motor current ripple, limiting the short circuit current in the converter load circuit until the protection trips.
Air-core smoothing reactor serves to reduce pulsations in DC circuits. Structurally, the reactor consists of a coil with a steel core. For a closed version, a protective cover is provided. The low resistance of the coil does not affect the DC component, but the alternating current is dissipated by inductive resistance.
A current-limiting reactor is used to limit short-circuit currents. Keeps the voltage level in electrical installations during emergency modes of short circuit. It is used in power systems with voltage up to 330 kV. An air-core current-limiting reactor is resistant to short-circuit currents that exceed the rated value. It does not lose inductive resistance due to saturation.
The current-limiting reactor (type RTT) is designed to operate in power systems for voltages up to 1000 V in order to limit short-circuit currents in electrical networks and to act as a ballast inductance in thyristor converter circuits. An air-core current-limiting reactor is resistant to short-circuit currents that exceed the rated value. It does not lose inductive resistance due to saturation of the magnetic system.
Low-voltage three-phase power transformers of the "TSZ" series are designed to convert electrical energy in electrical networks with three-phase alternating current electrical installations of general purpose (up to 1000 V). The areas of application are various: electric power industry, industrial enterprises in the field of mechanical engineering, ferrous and non-ferrous metallurgy, mining, oil and gas and processing industries, etc.
Three-phase high voltage transformer (TU U 31.1-31624085-005-2010) with natural air cooling included in the 50 Hz AC network, climatic version U, placement categories 2, 3 according to GOST 15150 are designed to work in industrial electrical installations of general purpose and complete transformer substations. In coordination with the customer, transformers with other parameters with power up to 6300 kVA can be manufactured.
Single phase low-voltage transformer of the OSM series with a capacity of 0.063 ÷ 4.0 kVA (TU U 31.1-31624085-002: 2010) are intended for power supply of control circuits, local lighting, signaling and automation. The basis of the magnetic system of transformers with a capacity of 0.063 ÷ 1.6 kVA is based on original design solutions protected by a copyright certificate (patent 46630). Transformers meet all requirements of standards.
Three-phase transformers of the TSZI series (TU U 31.1-31624085-001: 2010) - transformers, in the magnetic system of which a three-phase magnetic field is created, with natural air cooling, included in the AC network of frequency 50-60 Hz, designed to power the power tool, control circuits and low-voltage lighting networks. The basis of the magnetic system of transformers laid original design solutions protected by copyright certificate (patent 2398300). Transformers meet all the requirements of European standards.