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What are the two voltage regulation methods for electroslag furnace transformers?

The electric slag furnace is used to remelt the essence of steel made by ordinary exercise methods, and single-phase power supply is used throughout. Production of aviation bearing steel, high temperature alloy, resistance table gold, fine alloys and some non-ferrous metals, etc., can also be used to produce large high-quality alloy steel ingots, large slabs or slabs and other special shaped castings and other electric slag furnace power supply.

Electroslag furnace transformerThere is no reactor. Electroslag metallurgy is different from arc steelmaking. When the slag is directly generated by the method of adding electrodes and auxiliary steel scraps, there is an arc only at the beginning stage. After the slag formation is completed, it is converted into a basic arc-free electroslag process. This process It has continued until the end of melting, and the transformer of the electric slag furnace power supply requires a low no-load voltage and a small impedance voltage. The low-voltage voltage of the transformer of the electroslag furnace must have voltage regulation levels. The voltage regulation methods are: 1, no-excitation and no-load voltage regulation; 2, with excitation and no-load voltage regulation; 3, on-load voltage regulation.

The electroslag furnace transformer is the key equipment of the electroslag furnace and a special power transformer. It is a product designed according to the process requirements of submerged arc remelting high-quality steel and special steel in the electroslag furnace. The design is large and delicate, with smooth external characteristics and stable and reliable work.

Commonly used electroslag furnace transformer voltage regulation methods are divided into two types: no-load or on-load tap-changer for stepped voltage regulation and on-load stepless lubricating voltage regulation.

  1. No-load step-by-step voltage regulation No-load voltage-regulating transformer is a no-load transfer switch, which is a kind of zero-current voltage regulation, which means that the azimuth adjustment voltage of the tap-changer must be changed in the event of a power failure , So the voltage can not be continuously output smooth. No-load voltage regulation generally has a small adjustment range (each tap changes, the voltage adjustment is 2. {{2}% or {{2}}%), and the output voltage quality is poor . However, the transformer of this voltage regulation method has a simple structure, is relatively cheap, and has a small size. This kind of pressure regulation method is suitable for small electric slag furnace (less than 2 t) not controlled by computer. Low cost, reliable performance and low failure rate. However, it has a certain impact on the number of voltage adjustments required during the exercise and the current changes the electroslag remelting process smoothly. No-load level-regulated transformers. In daily work, make sure to manually change gears and high-voltage interlocking maintenance to avoid voltage regulation in the case of closing.

  2. On-load on-stage voltage regulation On-load on-stage voltage regulation is to install the on-load on-stage tap-changer in the transformer. The on-load on-load tap-changer can change the tapping orientation when the transformer is under load Therefore, it is possible to adjust the working voltage by changing the transformation ratio without power failure.