The foundry industry, as a sawtooth industry in industrial development, is an industry that cannot be separated from the production of daily necessities. With the continuous upgrading and development of our foundry industry, casting equipment is also constantly transforming and upgrading. From the initial blast furnace to the intermediate frequency electric furnace, in the future, it is not the country that forces you to upgrade, but the optimization of production and energy conservation (electricity saving) that forces you to upgrade. The blast furnace has disappeared from the historical stage of the foundry industry, and will be replaced by more energy-efficient and clean medium frequency induction furnaces. The medium frequency induction melting furnace has a fast heating speed, which has significant effects in reducing smoke and dust generation, saving energy, improving productivity, improving working conditions, reducing labor intensity, and purifying workshop environment. Especially for cast iron, induction melting furnaces are advantageous in obtaining low sulfur molten iron, which cannot be compared to cupolas. Casting enterprises should choose intermediate frequency melting furnaces based on transformer capacity, production requirements, investment amount, and other criteria. When selecting transformers for intermediate frequency furnaces (electric furnaces), the following points should be noted.
Previously, SCR full bridge parallel (series) inverter intermediate frequency power supply was commonly used in the intermediate frequency furnace industry.
The numerical relationship between transformer capacity and power supply value is: transformer capacity value=power supply value x 1.2. For example, if the power of the intermediate frequency furnace is 1000KW, the selected intermediate frequency furnace transformer should be 1250KVA.
For IGBT half bridge series inverter intermediate frequency power supply, the numerical relationship between transformer capacity and power supply is: the value of transformer capacity=the value of power supply x 1.1. The transformer is a rectifier transformer. In order to reduce harmonic interference, it is recommended to use a dedicated machine, that is, one intermediate frequency power supply is equipped with one rectifier transformer. For example, a 1000WK intermediate frequency furnace is equipped with a transformer capacity of 1100KVA.
The intermediate frequency induction melting line voltage intermediate frequency power supply generally uses 50HZ industrial electricity, and is equipped with more 12 pulse rectifier intermediate frequency power supplies (commonly known as 12 pulse);
The secondary voltage of intermediate frequency furnaces is currently mostly 400V, 575V, 660V, 750V, 800V, 950V, 1000V, etc.
In the selection of transformers in the foundry industry, it is necessary to adopt * capacity matching. Xingniu Special Transformer * produces and develops medium frequency furnace dedicated transformers, and can customize energy-saving transformers for you free of charge to reduce power consumption, and provide free energy-saving solutions. You can inquire: Mr. Liu, 13700791131.