Current Conducting Electrode Arms

Generally speaking, the current conducting electrode arms have the function of supporting high current conduction. In the past, the electrode support function and conductor function of the electrode cross arm were completely separated, and the conductor was generally supported on the electrode cross arm in an insulated manner.

In order to meet the high-performance requirements of the electrode conductive arm, the structure of the conductor part is particularly complex, and because the vibration and induction heating caused by high temperature, dusty gas and electromagnetic force are extremely harsh, the previous conductive copper tube structure has many problems in reliability and maintenance. In addition to solving these problems, the reduction of reactance is often required as a research topic for large furnaces.

The current conducting electrode arms were first used in France in 1960, but it was not popularized. By the early 1980s, steel plate products coated with copper were developed as regular conductive arms. The conductive electrode arm is different from the previous copper tube bus structure. A large current flows directly through the electrode cross arm, which makes the electrode support and conductor function. At present, there are two ways of covering copper arms and aluminum alloy arms, and recently, almost all copper tube buses have been replaced by conductive cross arms.

The structure of the conductive arm is very simple, and the second conductor part is particularly strong and reliable, which can also fully reduce the reactance. In the transformation of existing furnaces, the arc power is increased due to the reduction of conductor resistance and reactance, and the effect of shortening T-T time and improving productivity has been achieved.

The aluminum alloy arm further improves the speed and control performance of electrode lifting due to its light device. Because vibration attenuation can improve the stability of the arc and increase the arc power, this is the reason why an aluminum alloy arm should be used instead of a copper-clad steel arm.

When our existing furnaces use conductive cross arms, the existing relevant equipment, such as the furnace transformer capacity or load impact control device, cannot achieve the expected increase in input power and productivity. Therefore, the effect of the whole system must be evaluated before using the power conductive electrode arm.

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