High Current Heating Transformer
High current heating transformer is a transformer designed to provide power for various electric furnaces. High current heating transformer can be roughly divided into three categories: resistance furnace transformers, electric arc furnace transformers, and induction furnace transformers. We can provide quotations and technical support for the High current heating transformer.
The primary voltage of this series of products is generally 220, 380 volts, or 650 volts, and their secondary voltage varies depending on the magnitude of the rising current, forming a series for industrial and mining enterprises to use. When using this series of products, it is generally necessary to install a voltage regulator on the front side of the power supply to achieve stepless regulation on the secondary side. Some products are equipped with primary taps, which are only allowed to adjust the voltage after cutting off the power supply.
Product Usage:
The low voltage high current transformer series is suitable for continuous load testing and current boosting of switches, current transformers or other electrical equipment with a rated frequency of 50 Hz.
Structural features:
The primary coil of this series of products is generally cylindrical, and the secondary coil is generally a spiral coil made of bare conductor bending. The primary coil generally does not have a voltage tap, and the voltage transformation of the secondary coil is achieved by series and parallel connections, with coil connection combinations ranging from 1/1 to 12. The transformer iron core is uniformly made of core type iron core, which is stacked with electrical silicon steel sheets, and the iron column adopts a multi-stage stepped circular cross-section; The iron core adopts a rectangular or convex cross-section. Use steel sections as clamps on both sides of the upper and lower iron yokes, and use clamp screws to achieve the purpose of compressing the iron core.
This series adopts air self cooling type, while the rest are exposed to the air and have openings or lifting rings that can lift the entire body.
If this series of products wants to adjust the load current of the tested product, it still needs to be matched with voltage adjustment (induction regulator or mobile voltage regulator) to achieve smooth and stepless adjustment.
Product advantages:
From the initial two-dimensional electric field simulation, three-dimensional electric field measurement, and impulse characteristic measurement, to the later theoretical analysis and simulation tests on the characteristics of the transformer's main insulation, longitudinal insulation, end insulation, lead insulation, and coil under lightning impulse voltage, after years and multiple methods of verification, the reliability of transformer insulation has been ensured.
We specialize in the calculation and measurement of transformer leakage magnetic field, the shielding structure of leakage magnetic field, the calculation of transformer dynamic and thermal stability, and the improvement of transformer dynamic and thermal stability capabilities, in order to ensure the calculation of leakage inductance field and reduce stray losses, and improve transformer dynamic stability.
Our company has collaborated with universities such as Tsinghua University, Beijing University of Science and Technology, and Huazhong University of Science and Technology to jointly develop a calculation program for the temperature field of the coil. By calculating the loss distribution of the coil (including resistance loss, eddy current loss in different directions, and circulating current loss between parallel wires) and the cooling condition of the flow velocity field, we can accurately calculate the temperature distribution of the coil and the temperature rise of the hot spot, so as to take measures to effectively control the temperature rise of the hot spot that affects the life of the transformer.
The electric field strength of each part has been analyzed and strictly controlled during the design phase. The compliance of manufacturing quality, reliability of processing methods, and rationality of operation technology also effectively control the local discharge of transformer alarms.
Advanced production technology ensures the reliability of products:
The transformer body adopts a high-temperature resistant mixed insulation system, which effectively solves the problem of temperature field differences in different types of transformer structures and ensures the safety and reliability of the insulation system.
Made of high-quality conductor winding and reinforced with long and short cut glass fiber felt, it is poured under vacuum using the world-class Heinrich vacuum casting system
The robot is fully automatic in laminating, adopting a fully inclined 45 degree 7-step ladder joint structure, which improves the efficiency and quality of transformer laminating.
All products strictly control the production process and quality links, and undergo strict testing and inspection according to national standards and customer customized requirements before leaving the factory, including partial discharge inspection, lightning impact resistance inspection, noise inspection and other necessary inspection items. Advanced testing equipment and a comprehensive inspection and testing system ensure the high quality and excellence of the products.
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