Users who are familiar with vacuum arc furnaces know their features, applications, working principles, and some precautions. However, during operation, small faults may occur, and the causes are sometimes unclear. Common issues include:
- Arc Generation in Vacuum:
- An arc in a vacuum requires high voltage and low pressure, typically in the kilovolt range and below 1 Pa.
- If the vacuum is too high, an arc cannot form. In atmospheric conditions, arcs form easily, similar to an electric welding machine.
- Arc Dependence on Vacuum and Voltage:
- The characteristics of the vacuum arc depend on the vacuum level, applied voltage, and electrode spacing.
- Mechanical Contact Arcing:
- Mechanical electrodes switching on and off will inevitably produce arcs. Even the smallest contactor will arc; only the size differs.
- Motor Coil Arcing:
- If the furnace’s motor coils generate arcs, the coil may still function, but caution is needed as all coils are insulated.
- Open-Circuit Faults:
- Open circuits are very common in vacuum arc furnaces, primarily seen as a broken circuit.
- In some cases, an open circuit can cause overvoltage. Arcs formed at the break point may lead to electrical fires or explosions.
These are four common problems with vacuum arc furnaces. For more information, please consult the manufacturer Baoji Dingsheng Vacuum Thermal Technology Co., Ltd.